Analog Devices EVAL-ADP1653EB User manual

ADP1653 Flash LED Driver
Evaluation Board Manual
EVAL-ADP1653EB
Rev. A
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards as supplied “as is” and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. Information furnished by Analog
Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result
from its use. Analog Devices reserves the right to change devices or specifications at any time
without notice. Trademarks and registered trademarks are the property of their respective owners.
Evaluation boards are not authorized to be used in life support devices or systems.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2006–2007 Analog Devices, Inc. All rights reserved.
FEATURES
Input voltage 2.7 V to 5.5 V
Boost solution supports up to 12 V
Evaluates 1 to 4 LED solutions
Configurable for 2-bit logic or I2C® interface
Jumpers for measurement of flash LED current
and inductor current
TxMask for changing flash current on the fly
Evaluation software included
GENERAL DESCRIPTION
The evaluation system is composed of a motherboard and
a daughterboard. The motherboard provides the I2C signals
from the computer USB port and generates the I/O voltages
and digital high and low signals for the daughterboard. For
temperature measurement, the daughterboard can be either
plugged directly into the motherboard or connected to the
motherboard via the ribbon cable provided with the evaluation kit.
The motherboard features a 3.3 V regulator and a 1.8 V
regulator. The jumpers on the bottom left of the motherboard
set the VIC voltage, which is the I2C voltage for the control pins.
Users can choose among the 1.8 V, 3.3 V, or 5 V USB or the
external VBAT as the supply voltage for the daughterboard.
The daughterboard contains numerous jumpers and test points
for easy evaluation of the board. Also included with the kit are
two current probes that can be plugged directly into jumper
heads to measure currents with current probes.
Warning
For safety reasons, do not look directly into the LEDs at close
range. They are very bright and can cause eye injury.
FUNCTIONAL BLOCK DIAGRAM
GND
VBAT
EN
STR
INT
SCL
SDA
Tx
VIC
REV 0.4.1
GND
J7
J5
J4
J6
SETT
SETF
SETI
J8 J1
J3
JP3
GND
GND
R4
R3
R5
R6
R2
R1
ADP1653
L1
C1
D1
C2
C3
D2
D3
J2
GND
VBAT
OUT
HPLED
D10
SHARP
GND
ANALOG DEVICES
MINI
USB
5V VBAT 1.8V 3.3V
VBAT
5V
JP13 JP12
C19
U4
R25
R24
R22
C14
C11
R50 C10
C51
C8
C30
C31
U3
C5 D8
C12
C13
C7
C9 C18
R31
R30
U2
C6
R64
R63
R62
C17
C15 C16 R66
R65
C21
R27
R26
U5
C20
C50
R21
USB_OK
STROBE
JP10 JP11 JP9
SCL/CTRL1
HLHH
LL
SDA/CTRL0 TxMASK
EN
HL
JP6 R51
EN STR
SCL SDA GP2
GP1
GND
INT GP2 GP1
D5 R19 D6 R20
D7 R23
ADI USB/I2C INTERFACE 0.4
VIC
06298-001
INT
Figure 1.

EVAL-ADP1653EB
Rev. A | Page 2 of 20
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Software Installation......................................................................... 3
USB Driver Installation.................................................................... 5
Using the Software............................................................................ 6
ILED and HPLED Current Programming................................ 6
Software Strobe............................................................................. 7
Clock and Timeout Duration Programming............................ 7
Fault Detection Status.................................................................. 7
Register Values.............................................................................. 7
Auto Range Finder ....................................................................... 7
History ........................................................................................... 8
Evaluation Board Overview .............................................................9
Motherboard..................................................................................9
Motherboard Schematics .......................................................... 10
Daughterboard............................................................................ 11
Daughterboard Schematics....................................................... 13
Test Results Using Evaluation Board ....................................... 14
PCB Layout ................................................................................. 15
FAQs................................................................................................. 17
Ordering Information.................................................................... 18
Bill of Materials........................................................................... 18
Ordering Guide .......................................................................... 20
ESD Caution................................................................................ 20

EVAL-ADP1653EB
Rev. A | Page 3 of 20
SOFTWARE INSTALLATION
1. Insert the setup CD into the CD-ROM and run the file
ADP1653 Setup 0_5.exe. When the dialog box shown in
Figure 2 appears, click Next> to continue.
06298-002
Figure 2. ADP165x Evaluation Software Setup
2. Click Yes to accept the license agreement.
06298-003
Figure 3. License Agreement
3. Click Next> to install the files to the default destination folder
or click Browse… to choose a different file.
0
6298-004
Figure 4. Choose Destination Location
4. Click Next> to continue with the installation.
06298-005
Figure 5. Setup Type

EVAL-ADP1653EB
Rev. A | Page 4 of 20
5. Click Next> to install the program to the default
program folder.
06298-006
Figure 6. Select Program Folder
6. Wait while the program installs.
06298-007
Figure 7. Status Setup
7. Click Finish to complete the installation.
06298-008
Figure 8. InstallShield Wizard Complete

EVAL-ADP1653EB
Rev. A | Page 5 of 20
USB DRIVER INSTALLATION
1. Plug the ADP1653 board into the computer using the USB
cable provided with the evaluation kit. Once the system recog-
nizes the board, the dialog box shown in Figure 9 appears.
2. Click Next> to install the driver.
06298-009
Figure 9. Found New Hardware Wizard
3. Click Continue Anyway and then Finish to complete the
driver installation.
06298-010
Figure 10. Hardware Installation

EVAL-ADP1653EB
Rev. A | Page 6 of 20
USING THE SOFTWARE
1. HISTORY.
2. ILED AND HPLED CURRENT PROGRAMMING.
3. SOFTWARE STROBE FOR FLASHING.
4. CLOCK AND TIME OUT DURATION PROGRAMMING.
5. FAULT DETECTION STATUS.
6. AUTO RANGE FINDER.
7. REGISTER VALUES.
06298-011
2 3
456
7
1
Figure 11. Evaluation Board Software
Before running the software, ensure that the board is plugged
into the computer USB port (the USB-OK LED on the
motherboard should light up).
1. Click START >All Programs > Analog Devices >ADP165x
Evaluation Software0_5 > ADP1653 Rev E.exe. The software
detects the presence of the board’s USB interface and sends the
following message: I2C OK.
2. Click OK to continue.
ILED AND HPLED CURRENT PROGRAMMING
To program the ILED current, slide the ILED Current scroll
bar to the desired setting and click UPDATE!.For the HPLED
current, enter the values of the TxMask voltage and the SETF
resistors (R4 and R5), and then click Update TxMask and SETF
Resistors. The default values are TxMask Voltage = 0 (GND), R4 =
332 kΩ, and R5 = 105 kΩ. As you change the values of the
TxMask voltage and the SETF resistors, the HPLED current
values shown adjust accordingly. Note that changing the values
of the resistors and the TxMask voltage in the software does not
change the actual current of the LEDs. To change the actual
current, replace the physical resistors or change the TxMask voltage
on the board. The Update TxMask and SETF Resistors button
merely calculates the current levels that correspond to the values
of the resistors and the TxMask voltage entered in the text
boxes.
For the given values of the R4, R5, and TxMask voltage, the
HPLED current is
R4
V
R5
ITxMask
REF
−
+= V2.1
V1.2
V2.1
kΩ50
)mA15mA35( REF
HPLED
I
CodeI
×
××+=
where IREF is the reference current at the SETF pin, and Code is
the HPLED register setting, ranging from 0 to 31.

EVAL-ADP1653EB
Rev. A | Page 7 of 20
Applying a TxMask voltage reduces the SETF reference current
and therefore reduces the HPLED current. The maximum
TxMask voltage allowed for R4 and R5 is
⎟
⎠
⎞
⎜
⎝
⎛+×= R5
R4
VTxMask 1V2.1
Using a larger TxMask voltage causes a negative reference
current and triggers the overvoltage protection. The interrupt
LED turns on to indicate the fault.
Table 1 shows the maximum HPLED current (code = 31) for
various values of R4, R5, and TxMask voltage. The first entry
(R4 = 99999, R5 = 50 kΩ, and TxMask = Z) simulates the default
internal reference current obtained by tying the SETF pin high.
R4 = 99999 is equivalent to R4 being any numerical value.
Table 1. Maximum HPLED Currents
R4 (kΩ) R5 (kΩ)
TxMask
Voltage (V)
Maximum
HPLED Current (mA)
99999150 Z 500
50 50 1.8 250
332 105 0 313
150 50 3.3 208
1R4 = 99999 is equivalent to R4 being any numerical value.
Slide the HPLED Current scroll bar to the desired setting and
click UPDATE! to change the HPLED settings. Settings 1 to 11
are torch mode, and settings 12 to 31 are flash mode. All the
settings are indicated next to the HPLED Current scroll bar.
When the device is in flash mode, you must click either the
Physical Strobe button on the motherboard or the STROBE!
button in the software to flash the LEDs. Clicking Reset Fault
clears any interrupts by resetting both ILED and HPLED
settings to 0.
SOFTWARE STROBE
Instead of using the Hardware Strobe button on the motherboard,
an I2C software strobe can be used. When the HPLED register is in
the flash setting, click STROBE! to flash the LEDs.
CLOCK AND TIMEOUT DURATION PROGRAMMING
Oscillator Frequency
Because the timeout duration that the software reports is based
on the default 1.2 MHz, if the oscillator frequency is not exactly
1.2 MHz, the timeout duration shown is incorrect. As a result,
you can enter the exact oscillator frequency measured on a scope
and then click UPDATE! to calculate the correct timeout duration.
Timeout Configuration
The user can choose to run the device in the timed or untimed
mode. In timed mode, the LEDs flash for the programmed timeout
duration even if the strobe button is released prior to the end of
the duration. In untimed mode, the LEDs flash for as long as the
hardware strobe button is pressed until the programmed timeout
duration is reached. The part then issues a timeout fault, and the
interrupt LED lights up.
Timeout Value
The Time Out Value drop-down box is used to program the
timeout duration.
FAULT DETECTION STATUS
The Register 3 – Fault Register section is used to read back the
fault detection status from the ADP1653. When a fault occurs,
the interrupt LED on the motherboard lights up. Click READ! to
view information about the fault. Overvoltage fault occurs when
the output voltage is greater than 10.2 V (nominal). Timeout
fault occurs when the user presses the strobe button longer than
the programmed timeout duration in the untimed mode.
Thermal fault occurs when the device junction temperature is
greater than 155°C. Short-circuit fault occurs if the HPLED pin
remains grounded 820 ms after torch is enabled.
REGISTER VALUES
The register values section displays the value in each register in the
hexadecimal format.
AUTO RANGE FINDER
The Auto Range Finder box is used to simulate the function of
a camera’s auto range finder, which is used to torch the LEDs to
focus on the object in a dark room, for example, and then to
flash the LEDs and take a picture. To use this feature, select the
desired setting for both the torch and flash modes (1 to 11 for
torch, 12 to 31 for flash). Then click Torch Then Flash once to
torch the LEDs and once more to initiate a flash.

EVAL-ADP1653EB
Rev. A | Page 8 of 20
HISTORY
Whenever you issue a command (both read and write), it is
recorded in the History dialog box shown in Figure 12.
To displ ay t he History dialog box, click the History menu on
the main software dialog box or the Windows® History tab on
the bottom. To clear the history, click Clear History.
You can copy and paste the history into a file for future
evaluation purposes.
06298-012
Figure 12. History

EVAL-ADP1653EB
Rev. A | Page 9 of 20
EVALUATION BOARD OVERVIEW
MOTHERBOARD
MINI
USB
5V VBAT1.8V 3.3V
VBAT
VIC
5V
JP13 JP12
C19
U4
R25
R24
R22
C14
C11
R50 C10
C51
C8
C30
C31
U3
C5 D8
C12
C13
C7
C9 C18
R31
R30
U2
C6
R64
R63
R62
C17
C15 C16 R66
R65
C21
R27
R26
U5
C20
C50
R21
USB_OK
STROBE
JP10 JP11 JP9
SCL/CTRL1
HLHH
LL
SDA/CTRL0 TxMASK
EN
HL
JP6 R51
EN STR
SCL SDA GP2
GP1
GND
GP2 GP1
D5 R19
D6 R20
D7 R23
ADI USB/I2C INTERFACE 0.4
STROBE: USE PUSHBUTTON FOR FLASH
FOR I
2
C MODE CODES >12 -31
(HPLED > 200mA FOR DEFAULT SETF RESISTOR)
ADP3300: 3.3V 500mA LDO
SUPPLY FOR CY68013A
VIC: USE HEADER TO SET
INTERFACE VOLTAGE,
AND SUPPLY FOR EEPROM
CY68013A MICROCONTROLLER:
PROVIDES USB TO I
2
C CONVERSION.
3.3V
1.8V
1.8V EEPROM M24C64R:
HOLDS USB ID CODES
GND
INT LED: INDICATES FAULT CONDITIONADP1715 1.8V 500mA LDO
HARDWARE MODE: USE 3-WAY SWITCH TO SELECT OPERATION.
I
2
C MODE: TIE SCL AND SDA TO H POSITION.
CONNECT MOTHER BOARD TO DAUGHTER BOARD
DIRECTLY AT HEADER OR WITH RIBBON
CABLE FOR TEMP MEASURMENTS
06298-013
INT
INT
Figure 13. Motherboard
The ADP1653 motherboard provides the interface signals to the
ADP1653 flash driver IC. These include the CTRL0/SDA and
CTRL1/SCL lines for I2C or the control line voltages for the HW
interface modes (strobe, enable, and TxMask).
The Cypress Semiconductor Corporation CY68013A provides
the USB interface and I2C signals. The selected I2C frequency is
100 kHz. The Motorola M24C64R provides the USB address of
the board. The interface voltage is selected with the VIC header
on the board and is set to 3.3 V by default.
Typically, the daughterboard is inserted directly into the 20-pin
header of the motherboard. For temperature measurements,
however, the ribbon cable provided with the evaluation kit must
be used to connect the motherboard and the daughterboard
because the Cypress CY68013A is not rated at −40°C. The 8-pin
header on the top of the motherboard can be used to connect
external signals. A no connect state is selectable on all signals
generated by the motherboard.
The INT red LED located at the top right of the board lights up
when a fault is detected on the ADP1653. However, with the
daughterboard connected and no VDD supply to the ADP1653, the
INT red LED also lights up even though this is normal
operation. Table 2 shows the recommended settings when the
device is first powered up.
Table 2. Recommended Settings
Control
Hardware Mode
INTF = 1
I2C Mode
INTF = 0
EN High High
CTRL0/SDA See Table 3 Must be high
CTRL1/SCL See Table 3 Must be high
STR X = don’t care For HPLED setting > 12,
enables flash
In the hardware mode, CTRL0 and CTRL1 determine the mode
of operation. Tabl e 3 shows the combinations of settings for the
control pins and the corresponding modes.
Table 3. Control Pins
Mode of Operation CTRL1 CTRL0
Disabled 0 0
ILED 0 1
Torch 1 0
Flash 1 1

EVAL-ADP1653EB
Rev. A | Page 10 of 20
MOTHERBOARD SCHEMATICS
5V USB
IC_VDD
VBAT_M
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
IC_VDD
3.3V
GPIO1
GPIO2
INT
GPIO2 GPIO1
IC_VDD
SCL1
SDA1
IC_VDD
EN
IC_VDD
SCL1
STR
3.3V
5V USB
1.8V
VBAT_M
IC_VDD
SCL1
STR
SDA1
IC_VDD
IC_VDD
1.8V
3.3V
3.3V
5V USB
VBAT_M
I
2
C CONTROL LINES
STROBE ! SWITCH BRINGS STR HIGH
FOR FLASH !
SW PUSHBUTTON
STROBE !
ENABLE
GPIO1
2 HEADERS USED FOR MECHANICAL STABILITY 1 ON MOTHER, DAUGHTER
GPIO2
JP21
HEADER 10
1 2 3 4 5 6 7 8 9
10
1 2 3 4 5 6 7 8 9 10
JP20
HEADER 10
1 2 3 4 5 6 7 8 9
10
1 2 3 4 5 6 7 8 9 10
TP14
SCL
C18
100nF
C14
1nF
C9
6.2pF
U5
ADP1715-1.8
EN IN OUT SS GND1
GND2 GND3 GND4
JP8
HEADER LARGE 10 × 2
12 34 56 78 910
1112 1314 1516 1718 1920
C21
2.2µF
S1
34
2 1
D6* LED
D5
LED
C13
100nF
C6 100nF
Y1
CRYSTAL14
2 3
1 4
C10 10nF
U4 M24LC64
A0
A1
A2
VSS SDA
SCL
WP
VCC
R63*
C31
47µF
C17
100nF
R51*
TP15
SDA
JP6
EN
11 22 33
R20*
R24
2.2kΩ
R25
2.2kΩ
R22
10kΩ
R23*
C15
100nF
R19*
R34* 105kΩ
R30 100kΩ
R65*
C5
100nF
JP9
SETF
D8 LED
R64*
U2
CY7C68013A
RDY0/SLRD RDY1/SLWR AVCC1 XTALOUT XTALIN AGND1 AVCC2 D+ D– AGND2 VCC1 GND1 IFC LK RES
1 2 3 4 5 6 7 8 9
10 11 12 13 14
SCL
SDA
VCC2
PB0/FD0
PB1/FD1
PB2/FD2
PB3/FD3
PB4/FD4
PB5/FD5
PB6/FD6
PB7/FD7
GND2
VCC3
GND3
15
16
17
18
19
20
21
22
23
24
25
26
27
28
CTL0 29 CTL1 30 CTL2 31
VCC4 32
PA0/INT1 33 PA1/INT1 34
PA3/*WU2 36
PA4/FIFOADR0 37 PA5/FIFOADR1 38
PA6/*PKTEND 39
PA7/*FLAG 40
GND4 41
RESET 42
PA2/*SLOE 35
VCC5 43
*WAKEUP 44
PD0/FD8 45
PD1/FD9 46
PD2/FD9 47
PD3/FD10 48
PD4/FD11 49
PD5/FD12 50
PD6/FD13 51
PD7/FD14 52
GND5 53
CLKOUT 54
VCC6 55
GND6 56
PAD PAD
JP5
USB MINI B
VDD
D–
D+
ID
GND
SHELL
1 2 3 4 5 6
C11 2.2uF
D7* LED
R32 105kΩ
JP10
SCL/CTRL1
JP7 HEADER LARGE 8
87654321
C50
2.2µF
R62*
R35*
0Ω
R31 1kΩ
R66*
U3
ADP3303- 3.3
OUT1 OUT2
NR
GNDSD
ERR IN2 IN1
C30 100nF
R27
100kΩ
R26
220kΩ
C8 6.2pF
C16
100nF
3.3V
EN
INT
INT
3.3V
C7 10µF
R21 100kΩ
SDA1
R33* 105kΩ
JP11
SDA/CTRL0
1
1
2
2
3
3
TP21
GND
TP20
1.8V
TP19
VBAT
TP18
IC_VDD
TP17 USB
TP16 3.3V
C19 100nF
3.3V
1.8V
JP12
IC_VDD1
11 22 33
JP13
IC_VDD2
11 22 33
IC_VDD
C12 1µF
3.3V
C51
100nF
C20
2.2µF
0
6298-014
1
1
2
2
3
3
1
1
2
2
3
3
*NOT POPULATED NOTES 1. DECOUPLING FOR EACH OF 6 68013A DIGITAL INPUTS, 0402 CAPS PLACED AS CLOSE AS POSSIBLE TO EACH PIN. GROUND IS COMMON GROUND TO AGND AT 1 POINT. NO GROUND DISTINCTION IN SCHEMATIC. 2. IC_VDD IS THE DIGITAL INTERFACE SUPPLY VOLTAGE—IC_VDD SHOULD BE CONNECTED TO EITHER 5V, 3.3V, 1.8V OR VBATT USING J4, J5. 3. R33, R34, R35 CAN BE ADDED IN HW MODE TO ALLOW FAST TRANSITIONS BETWEEN STATES
Figure 14. Motherboard Schematics

EVAL-ADP1653EB
Rev. A | Page 11 of 20
DAUGHTERBOARD
GND
VBAT
EN
STR
INT
SCL
SDA
Tx
VIC
REV 0.4.1
GND
J7
J5
J4
J6
SETT
SETF
SETI
J8 J1
J3
JP3
GND
R4
R3
R5
R6
R2
R1
L1
C1
D1
C2
C3
D2
D3
J2
GND
VBAT
OUT
HPLED
D10
SHARP
GND
ADP1653 EVAL BOARD
ANALOG DEVICES
V
IN
I
IN
2.7V TO 5.5V, 2.0A SUPPLY
OR BATTERY
USE THICK SHORT CABLES
A
MEASURE I
L
WITH
CURRENT PROBE
MEASURE I
HPLED
WITH
CURRENT PROBE
USE JP3
TO SET HW
OR I
2
C MODE
HW
I
2
C
ILED
CLOSE J2 FOR 1 LED
EVALUATION
USE JP6 TO CONNECT
VIC (MOTHER BOARD) TO VBAT
(USEFUL WHEN NO SUPPLY
AVAILABLE MAX 300mA)
R1 CAN BE USED TO MEASURE
I
HPLED
OR INCREASE BOOST VOLTAGE
TO SIMULATE HIGH V
F
LED
ADP1653
0
6298-015
Figure 15. Daughterboard
The ADP1653 evaluation daughterboard is designed to quickly
evaluate key parameters of the ADP1653 IC. The board layout
footprint is extended so that parts can be exchanged easily, and
headers are available to measure currents using a current probe
or ammeter.
Connect a power supply or Li-Ion battery with 2 A capability
to VBAT. Up to 1.8 A (nominal) can be drawn from the battery;
therefore, short thick cables are recommended to minimize the
IR drops. A high current can cause a big IR drop, and VBAT can be
low enough to put the part into UVLO.
IQ
IQis the supply current and can be measured by using an
ammeter across J8.
IL
ILis the inductor current and can be measured by using a current
loop across J1.
ILED
ILED is the LED current and can be measured by using an
ammeter or current loop across JP3.
High VFLEDs
By default, R1 is 0 Ω. It can be replaced with another resistor
for current measurement or for increasing the OUT voltage (to
simulate a higher boost ratio for a high VFLED).
One-LED Evaluation
The J2 jumper can be placed to short D3 for the evaluation of
the one-LED solution.
HW Mode or I2C
JP3 is used to select the hardware mode or I2C mode. Shorting
the INTF pin to VBAT selects the hardware mode, whereas
shorting it to GND selects the I2C mode.
Power Board from USB Port Only
To power the board via the USB without using an external
supply, short Jumper J6 on the daughterboard and short VIC to
5 V on JP13 on the motherboard. Figure 16 illustrates these two
jumpers. Ensure that the LED current is less than 200 mA to
avoid exceeding the 500 mA current limit of the USB.

EVAL-ADP1653EB
Rev. A | Page 12 of 20
GND
VBAT
EN
STR
INT
SCL
SDA
Tx
VIC
REV 0.4.1
GND
J7
J5
J4
J6
SETT
SETF
SETI
J8 J1
J3
JP3
GND
GND
R4
R3
R5
R6
R2
R1
ADP1653
L1
C1
D1
C2
C3
D2
D3
J2
GND
VBAT
OUT
HPLED
D10
SHARP
GND
ANALOG DEVICES
MINI
USB
5V VBAT 1.8V 3.3V
VBAT
5V
JP13 JP12
C19
U4
R25
R24
R22
C14
C11
R50 C10
C51
C8
C30
C31
U3
C5 D8
C12
C13
C7
C9 C18
R31
R30
U2
C6
R64
R63
R62
C17
C15 C16 R66
R65
C21
R27
R26
U5
C20
C50
R21
USB_OK
STROBE
JP10 JP11 JP9
SCL/CTRL1
HLHH
LL
SDA/CTRL0 TxMASK
EN
HL
JP6 R51
EN STR
SCL SDA GP2
GP1
GND
GP2 GP1
D5 R19
D6 R20
D7 R23
ADI USB/I
2
C INTERFACE 0.4
VIC
SHORT VI
C
TO 5V
SHORT J6
06298-016
INT
INT
Figure 16. Evaluation Board Setup to Run from USB Power

EVAL-ADP1653EB
Rev. A | Page 13 of 20
DAUGHTERBOARD SCHEMATICS
VBAT
OUT
VBAT
OUT
POWER SECTION
LX NODE
TP1
CAPACITOR/TVS DIODES CAN BE PLACED HERE FOR ESD PROTECTION.
INTF = GND, I
2
C MODE
INTF = HI, HW MODE
D4 INDICATOR LED
JP3
INTF
1
1
2
2
3
3
HPLED
PGND
D1
12
L1 2.2
µ
H
1 2
D10 WHITE-LED
D9
SHARP LED
C11 A12 A23 C24C3 5
A3 6 A4 7 C4 8
D2 WHITE-LED
C1
4.7
µ
F
C2 4.7
µ
F
U1
ADP1653
SETT
1
SETF
2
CTRL1/SCL
3
CTRL0/SDA
4
SETI
5
ILED
6
OUT
7
GND
8
HPLED
9
INTF
10
INT
11
PGND
12
LX 13
VDD 14
EN 15
STR 16
PAD
17
VBAT
J1J8
J2
TP2
J3
OUT
TP3
PGND
VBAT
VIC_D
VIC_D
EN STR INT CTRL1/SCL CTRL0/SDA TxMASK
JP1
1 3 5 7 9 11 13 15 17 19
2 4 6 8
10 12 14 16 18 20
JP2
88 77 66 55 44 33 22 11 99
10 10
J6
RANDOM AGND TESTPOINTS FOR DIGITAL SIGNALS.
TP10 AGND
TP11 AGND
TP12 AGND
TP13 AGND
VBAT
VIC_D
VIC_D
CTRL1/SCL
J7
TP4CTRL0/SDA
R4
332kΩ
R5
105kΩ
R6 47kΩ
TP5
R1
0Ω
R2
10kΩ
R3
47.5kΩ
VIC_D
J5
VIC_D
J4
D3 WHITE-LED
C3 *
VBAT
06298-017
*NOT POPULATED ON THE BOARD. NOTES 1. GND (IC), PGND SHOULD BE CONNECTED AT A SINGLE POINT.
Figure 17. Daughterboard Schematics

EVAL-ADP1653EB
Rev. A | Page 14 of 20
TEST RESULTS USING EVALUATION BOARD
Table 4. Current Limit—Typical Part, OUT = 6.9 V
VBAT (V) Temp (°C) Current Limit (A)
Maximum Output
Current (mA),
Two LEDs
−40 2.1 500
0 2.08 486
+25 2.03 470
+85 1.93 440
2.9
+125 1.86 415
−40 N/A 500
0 N/A 500
+25 N/A 500
+85 N/A 500
3.6
+125 N/A 500
06298-018
CH1 1.00V M40.0µs A CH1 4.76V
1
Δ: 2.76V
@: 6.38V
Δ: 143µs
@: 74.4µs
Figure 18. Soft Start Ramp, Two LEDs, VBAT = 3.6 V, TA= 25°C
06298-019
CH1 2.00V M100ms A CH1 4.76V
1
Δ: 760mV
@: 6.64V
Δ: 412ms
@: 412ms
Figure 19. OUT Voltage—Timed Flash Mode, STR Glitch (Write 0 × 10 to Reg 1,
Glitch STR, Capture Transient on Scope and Measure Period) TA= 25°C
(Design = 410 ms, Measure = 412 ms)
06298-020
CH1 5.00V CH2 5.00V
CH3 1.00A ΩCH4 200mA Ω
M200µs A CH4 272mA
2
1
3
4
T8µs
Figure 20. Tx Masking—0 V to 3.3 V
Channel 1— Input Voltage
Channel 2—Output Voltage
Channel 3—Input (Inductor) Current
Channel 4—Output Current
06298-021
CH1 5.00V CH2 5.00V
CH3 1.00A ΩCH4 200mA Ω
M200µs A CH4 272mA
2
1
3
4
T8µs
Figure 21. Tx Masking—3.3 V to 0 V
Channel 1—Input Voltage
Channel 2—Output Voltage
Channel 3—Input (Inductor) Current
Channel 4—Output Current
06298-022
LED CURRENT (mA)
EFFICIENCY (%)
70
72
74
76
78
80
82
84
86
100 150 200 250 300 350 400
V
IN
= 3.0V
V
IN
= 3.2V
V
IN
= 3.6V
V
IN
= 4.2V
Figure 22. Efficiency Measurements, L = D2812C-2R0 (Toko America, Inc.)
Efficiency = PLED/PIN

EVAL-ADP1653EB
Rev. A | Page 15 of 20
PCB LAYOUT
The evaluation kit contains two boards. One board is for easy evaluations and contains a large footprint and layout size. The other is a reference
design that shows a small layout solution. Both boards utilize a 4-layer design with minimum traces.
Evaluation Board Layout
06298-023
Figure 23. Evaluation Daughterboard, Top Layer
06298-024
Figure 24. Evaluation Daughterboard, VDD Plane
06298-025
Figure 25. Evaluation Daughterboard, GND Plane
06298-026
Figure 26. Evaluation Daughterboard, Bottom Layer

EVAL-ADP1653EB
Rev. A | Page 16 of 20
Reference Board Layout
06298-027
Figure 27. Reference Daughterboard, Top Layer
06298-028
Figure 28. Reference Daughterboard, VDD Plane
06298-029
Figure 29. Reference Daughterboard, GND Plane
06298-030
Figure 30. Reference Daughterboard, Bottom Layer

EVAL-ADP1653EB
Rev. A | Page 17 of 20
FAQS
Why does the solution size seem bigger than was expected?
This board (4.0.1) is intended as an evaluation board, with easy
access to test points and current measurements and the ability
to switch components easily. The LFCSP and all other pads are
extended so that parts can be exchanged and hand-soldered
easily. The 0 Ω resistor between the diode and the LEDs can be
replaced with either a current-sensing resistor to measure
current or a larger resistor to simulate a system with a larger
HPLED VF.
The evaluation kit includes a 9 mm × 9 mm reference (including
the two LEDs), but several alternative reference designsare
available.
Why is the logic level of INTF equal to VBAT/2, whereas all
others are 1.8 V?
It is not envisaged that customers will change between HW and I2C
modes during operation; therefore, 1.8 V logic levels are not
necessary on this pin.
Can I use an ammeter to measure HPLED currents?
Yes, but it is not recommended due to the internal resistance of
the ammeter. It can be used in the torch mode. However,
measuring the battery current with an ammeter causes the part
to hit undervoltage lockout (UVLO) at a lower battery voltage
due to the IR drop. If an ammeter is used, ensure that its range
is not set to auto, because the resistance can change during the
measurement and result in a perturbation of the control loop.

EVAL-ADP1653EB
Rev. A | Page 18 of 20
ORDERING INFORMATION
BILL OF MATERIALS
Table 5.
Description Reference Designator Qty Manufacturer/Vendor Vendor P/N
Daughterboard
Capacitor, MLCC, 4.7 μF, 6.3 V, 0603, X5R C1 1 Murata Manufacturing
Co., Ltd.
GRM188R60J475K
Capacitor, MLCC, 4.7 μF, 16 V, 0805, X5R1C2 1
Murata Manufacturing
Co., Ltd.
GRM219R61A475K or
GRM21BR61C475K1
Capacitor, MLCC, 06032C3 1
Diode, Schottky D1 1 Diodes, Inc. BAT20J
White LED D2, D3 2 Philips Lumileds Lighting
Company
LXCL-PWF3
Red LED, 0402 SMD D4 (ILED) 1 Lumex Inc. SML-LX0402SIC-TR
White LED2D10 1
SharpLED2D9 1 Sharp Corporation GM5BW05340AC
Inductor, 2.2 μH L1 1 Toko America, Inc. FDSE0312-2R2
Resistor, 0 Ω, 1%, 0402 R1 1 Vishay Dale CRCW04020R00F
Resistor, 10 kΩ, 1%, 0402 R2 1 Vishay Dale CRCW04021002F
Resistor, 47.5 kΩ, 1%, 0402 R3, R6 2 Vishay Dale CRCW04024752F
Resistor, 332 kΩ, 1%, 0403 R4 1 Vishay Dale CRCW04023323F
Resistor, 105 kΩ, 1%, 0404 R5 1 Vishay Dale CRCW04021053F
ADP1653, 16-Lead LFCSP, 3 mm × 3 mm U1 1 Analog Devices, Inc. ADP1653
Header 0.100, Single, STR, 2 Pins J1 to J8 8 Sullins Electronics Inc./3M S1012-36-ND
Header 0.100, Single, STR, 2 Pins GND, VBAT, HPLED, OUT 4 Sullins Electronics Inc./3M S1012-36-ND
Header 0.100, Single, STR, 1 Pins GND (4), TP (close to D1) 6 Sullins Electronics Inc./3M S1012-36-ND
Header 0.100, Single, STR, 3 Pins JP3 1 Sullins Electronics Inc./3M S1012-36-ND
Header 0.100, Single, STR, 10 Pins Mounting Header 1 Sullins Electronics Inc./3M S1012-36-ND
Header, Female 0.100, Single, STR, 20 Pins GND, left bottom side 1 Samtec, Inc./3M SSW-110-03-G-D
Header, Female 0.100, Single, STR, 10 Pins Mounting Header 1 3M 929974-01-36-ND
Motherboard
Capacitor, MLCC, 100 nF, 10 V, 0402, X5R C5, C6, C13, C15 to C19,
C30, C51
10 Murata Manufacturing
Co., Ltd.
GRM155R61A104K
Capacitor, MLCC, 10 μF, 6.3 V, 0805, X5R C7 1 Murata Manufacturing
Co., Ltd.
GRM21BR60J106K
Capacitor, MLCC, 6.2 pF, 0402, NP0 C8, C9 2 Vishay/Panasonic ECJ-OEC1H0600
Capacitor, MLCC, 10 nF, 0402 C10 1 Vishay Vitramon or
equivalent
VJ0402Y103KXXA
Capacitor, MLCC, 2.2 μF, 10 V, 0603, X5R C11, C20, C21, C50 4 Murata Manufacturing
Co., Ltd.
GRM188R61A225K
Capacitor, MLCC, 1 μF, 25 V, 0805, X7R C12 1 Murata Manufacturing
Co., Ltd.
GRM21BR71E105K
Capacitor, MLCC, 1 nF, 0402 C14 1 Vishay Vitramon or
equivalent
VJ0402Y102KXXA
Capacitor, MLCC, 47 μF, 6.3 V, 1206, X5R C31 1 Murata Manufacturing
Co., Ltd.
GRM32ER61C476K
Red LED, 0402, SMD2D5, D7 2 Lumex Inc. SML-LX0402SIC-TR
Green LED, 0402, SMD2D8, D6 2 Lumex Inc. SML-LX0402SUGC-TR
Resistor, 0402, SMD2R20, R23, R33 to R35, R51,
R62 to R66
11
Resistor, 1 kΩ, 1%, 0402, SMD R19, R20, R31 3 Vishay Dale or equivalent CRCW04021001F
Resistor, 100 kΩ, 1%, 0402, SMD R21, R27, R30 3 Vishay Dale or equivalent CRCW04021003F
Resistor, 105 kΩ, 1%, 0402, SMD R32 1 Vishay Dale or equivalent CRCW04021053F

EVAL-ADP1653EB
Rev. A | Page 19 of 20
Description Reference Designator Qty Manufacturer/Vendor Vendor P/N
Resistor, 10 kΩ, 1%, 0402, SMD R22 1 Vishay Dale or equivalent CRCW040210022F
Resistor, 2.2 kΩ, 1%, 0402, SMD R24, R25 2 Vishay Dale or equivalent CRCW040222021F
Resistor, 220 kΩ, 1%, 0402, SMD R26 1 Vishay Dale or equivalent CRCW0402203F
SW Push Button S1 (STROBE) 1 ITT Industries KT11P3JM
IC MCU USB Periph High SPD-56QFN U2 1 Cypress Semiconductor
Corporation
CY7C68013A
Microchip Serial EEPROM-64K, MSOP8 U4 1 Nu Horizons Electronics
Corp.
M24LC64 or 24AA64
IC LDO Regulator, SO-8 U3 1 Analog Devices, Inc. ADP3303-3.3
IC LDO Regulator, 500 mA, 8-Lead
MSOP
U5 1 Analog Devices, Inc. ADP1715-1.8
CRYSTAL14 Y1 1 CTS Corporation CTX651CT
USB Connector USB Mini B, 5p JP5 1 Delphi Corporation/
Molex
15430262-110 or 5679-0588
SW SPDT On-Off-On JP6, JP9 to JP11 4 ITT Industries, Cannon TS03CBE
Header, Male 0.100, Dual, STR, 20 Pins JP8 on schematic (no silk),
location: center top side
1 3M S1012-36, S2012-36-ND
Header 0.100, Single, STR, 10 Pins JP2 1 3M S1012-36
Header 0.100, Single, STR, 3 Pins JP12 1 3M S1012-36
Header 0.100, Single, STR, 3 Pins JP13 1 3M S1012-36
Header 0.100, Single, STR, 8 Pins JP7 (EN, STR, INT, SCL,
SDA, GP2, GP1, GND)
8 3M S1012-36
1For one-LED applications or higher current two-LED applications, a 16 V output capacitor is recommended to achieve good stability. See the ADP1653 data sheet for
more information.
2Not inserted.

EVAL-ADP1653EB
Rev. A | Page 20 of 20
ORDERING GUIDE
Model Description
ADP1653-EVALZ1Evaluation Board
1Z = RoHS Compliant Part.
ESD CAUTION
©2006–2007 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
EB06298-0-3/07(A)