Analog Devices ADP1650 User manual

Evaluation Board User Guide
UG-139
One Technology Way •P. O. Box 9106 •Norwood, MA 02062-9106, U.S.A. •Tel: [phone] •Fax: [phone] •www.analog.com
ADP1650 Evaluation Board
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.Rev. A | Page 1 of 16
FEATURES
Input voltage: 2.7 V to 5.0 V
Evaluates single LED flash driver performance
I2C interface
Jumpers for measurement of flash LED current and supply
current
Evaluation software CD with measurement report included
GENERAL DESCRIPTION
The evaluation system is composed of a motherboard, daughter-
board, and LED subboard. The motherboard provides the I2C
signals from the PC USB port and generates the I/O voltages
and digital high and low signals for the daughterboard. For
overtemperature measurement, the daughterboard can be either
plugged directly into the motherboard or connected to the
motherboard via a ribbon cable.
The motherboard features a 3.3 V regulator and 2.8 V/1.8 V
regulators for VDDIO. The daughterboard contains jumpers
and test points for easy evaluation of the flash driver integrated
circuit (IC).
Operating details are provided in the ADP1650 data sheet,
which should be consulted in conjunction with this evaluation
board user guide.
Figure 1 shows the contents of the ADP1650-EVALZ kit, which
includes
•Cables: power (red/black), USB, 2× current measurements
•Samples: five ADP1650 devices, two FDSD3012 inductors
•LED boards: OSRAM LUWF65N, LumiLEDs PWF-4
The ADP1650-EVALZ is intended for very detailed evaluation.
Contact a local sales office at Analog Devices, Inc., to request it.
ADP1650 EVALUATION BOARD KIT
09024-001
Figure 1.

UG-139 Evaluation Board User Guide
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TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
ADP1650 Evaluation Board Kit...................................................... 1
Revision History ............................................................................... 2
Evaluation Board Software .............................................................. 3
Installing the LabVIEW Run-Time Engine .............................. 3
Installing ADP1650 Evaluation Software.................................. 3
USB Driver Installation ............................................................... 4
Using the Software GUI................................................................... 5
Hardware Configuration and Monitors .................................... 5
LED Current Programming........................................................ 6
Indicator LED Mode .................................................................... 6
Flash LED Programming............................................................. 6
Software or Hardware Strobe for Flash ......................................6
Software or Hardware Torch........................................................6
Timeout Duration Programming................................................6
Fault Detection Status...................................................................7
Low VBAT ......................................................................................7
DC Current Limit..........................................................................7
Evaluation Board Overview .............................................................8
Motherboard ..................................................................................8
Demo Daughterboard...................................................................9
Power Board from USB Port Only ........................................... 10
Evaluation Board Schematics........................................................ 11
Ordering Information.................................................................... 14
Bill of Materials........................................................................... 14
REVISION HISTORY
9/10—Rev. 0 to Rev. A
Added Installing the LabVIEW Run-Time Engine Section ....... 3
Changes to Installing ADP1650 Evaluation Software Section ... 3
Changes to Using the Software GUI Section ................................ 5
Deleted ADC Mode Section............................................................ 7
Deleted ADP1650 EVALZ for Detailed Evaluation Section ..... 11
Changes to Evaluation Board Schematics Section ..................... 11
Changes to Bill of Materials Section ............................................ 14
5/10—Revision 0: Initial Version

Evaluation Board User Guide UG-139
Rev. A | Page 3 of 16
EVALUATION BOARD SOFTWARE
INSTALLING THE LABVIEW RUN-TIME ENGINE
The LabVIEW™ run-time engine must be installed on the PC
first unless LabVIEW 2009 is already installed. Insert the
ADP1650-EVALZ setup CD into the CD-ROM and run
LVRTE90STD.exe.
INSTALLING ADP1650 EVALUATION SOFTWARE
1. Insert the ADP1650-EVALZ setup CD into the CD-ROM
and run Setup.exe. When the dialog box shown in Figure 2
appears, click Next.
09024-002
Figure 2. ADP1650 Evaluation Software Setup
2. When the box shown in Figure 3 is displayed, click Ye s to
accept the license agreement.
09024-003
Figure 3. License Agreement
3. In the box shown in Figure 4, click Next to install the files
to the default destination folder, or click Browse… to
choose a different location.
09024-004
Figure 4. Installation Summary
4. Click Finish to complete the installation.
09024-005
Figure 5. Installation Complete

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USB DRIVER INSTALLATION
1. Plug the ADP1650 board into the computer using the USB
cable provided with the evaluation kit. When the system
recognizes the board, the Found New Hardware Wizard
dialog box appears.
09024-006
Figure 6. New Hardware Wizard
2. Click Next to install the USB driver.
3. Click Continue Anyway and then Finish to complete the
driver installation.
09024-007
Figure 7. New Hardware Installation

Evaluation Board User Guide UG-139
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USING THE SOFTWARE GUI
HARDWARE CONFIGURATION AND MONITORS
Complete the following steps to load the ADP1650 evaluation
software:
1. Before running the software, ensure that the motherboard
is plugged into the computer USB port (the 3.3 V OK LED
on the motherboard should light up).
2. Ensure that the daughterboard is supplied with a source
that can supply 3 A.
3. Click the Start button at the bottom left on your desktop.
4. Select All Programs, then the Analog Devices folder, and
then ADP1650 Evaluation Software v1.0 to load the
software.
The user registers window shown in Figure 8 is displayed.
6
5
3
4
2
7
1
OUTPUT ENABLE MUST
BE HIGH TO TURN ON FLASH LED
8
ENABLE MUST BE HIGH
TO ACTIVATE I
2
C
09024-008
Figure 8. ADP1650 Evaluation Software GUI: User Registers Window

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LED CURRENT PROGRAMMING
Before changing settings in the ADP1650 registers, you must
enable the I2C interface by clicking the EN button in Section 8
of the user registers window (the button turns green and the EN
LED on the motherboard lights up). This sets the EN pin of the
ADP1650 high.
INDICATOR LED MODE
Using the indicator LED can be a quick way to verify
communication between the software and the ADP1650.
1. Set GPIO2 Config in Section 3 of the user registers
window to Indicator. Then update Register 0x02 by
pressing Refresh 0x02. The red indicator LED on the
motherboard should turn on.
2. Ensure that Header J12 on the demo board has Pin 2 and
Pin 3 shorted with a jumper to connect the GPIO2 pin to
the red LED on the motherboard.
3. To change the indicator LED current, use Section 3 of the
user registers window.
4. Ensure a write to the ADP1650 by clicking the appropriate
refresh button in Section 6 on the right side of the user
registers window. The refresh button turns red to indicate
that a setting has changed for a register and must be
updated.
5. Turn of f the indicator LED by setting GPIO2 Config to
Hi-Z before performing the flash/assist light evaluation.
FLASH LED PROGRAMMING
1. To program the LED current, set Torch/Assist Current
and Flash Current in Section 2 of the user registers
window, and click the Refresh 0x03 button.
2. For USB-only powered demonstrations, use a maximum
Flash Current setting of 300 mA to avoid exceeding the
USB current source capability of 500 mA.
SOFTWARE OR HARDWARE STROBE FOR FLASH
There are three ways to initiate flash.
I2C Enabled Flash
1. Set EN in Section 8 of the user registers window.
2. In Section 1 of the window, set LED Mode to Flash,set
Output Enable to ON, and set Strobe Mode to S/W.
Refresh 0x04 should turn red to indicate that the front
panel settings must be written to the ADP1650.
3. Click the Refresh 0x04 button to initiate flash.
4. To program the length of the flash event, set the value
under S/W Flash Timer in Section 2 of the window and click
the Refresh 0x02 button.
Strobe Enabled Flash – Using the STROBE Button on the
Motherboard (Most Common)
1. Set EN in Section 8 of the user registers window.
2. In Section 1 of the window, set LED Mode to Flash, set
Strobe Mode to H/W, and set Output Enable to ON.
3. Click the Refresh 0x04 button.
4. In Section 8 at the top left of the window, set Strobe pin
Source to Push Button on Demo Board.
5. Press the STROBE button on the motherboard to initiate
flash.
Strobe Enabled Flash – Using the User Registers Window
1. Set EN in Section 8 of the user registers window.
2. In Section 1 of the window, set Output Mode to Flash, set
Strobe Mode to H/W, and set Output Enable to ON.
3. Click the Refresh 0x04 button.
4. In Section 8 of the window, set Strobe pin Source to
Micro-controller Driven.
5. Click the STROBE button in Section 8 of the window to
initiate flash.
6. Program the length of the flash event by setting the value
under S/W Flash Timer in Section 2 and clicking the
Refresh 0x02 button.
7. To initiate flash again, click Refresh 0x04 and click
STROBE again. STROBE can be enabled either from the
user registers window by clicking STROBE in Section 8 or
from the hardware by pressing the STROBE button on the
motherboard.
SOFTWARE OR HARDWARE TORCH
The torch can be activated in two ways: by pressing the TORCH
button on the motherboard or by completing the following
steps in the user registers window:
1. Set EN high (green) in Section 8 of the user registers
window.
2. In Section 1 of the window, set LED Mode to Assist.
3. Set Output Enable = 1 by clicking the Output Enable
button (green = 1).
4. Click the Refresh 0x04 button.
TIMEOUT DURATION PROGRAMMING
Timeout is hardware limited to a maximum of 1600 ms.
1. To set the desired flash timeouts, change the setting under
the Flash Timer box in Section 2, and click the Refresh
0x02 button. The timeout doubling bit is set by default by
the software.
2. To get 50 ms resolution, contact your Analog Devices field
applications engineer (FAE).

Evaluation Board User Guide UG-139
Rev. A | Page 7 of 16
FAULT DETECTION STATUS
Section 7 of the user registers window is used to read back the
fault detection status from the ADP1650. Click Read 0x05 to
view information about the fault. EN in Section 8 of the window
must be high (green) to be in read mode. An overvoltage fault
occurs when the output voltage is greater than 5.3 V (typical).
A timeout fault occurs when the STROBE button on the
evaluation board is pressed longer than the programmed
timeout duration in strobe level-sensitive mode. A thermal fault
occurs when the device junction temperature is greater than
150°C. A short-circuit fault occurs when the LED_OUT pin
remains grounded during startup. If the DC Current Limit
feature is enabled in Section 4 of the user registers window, and
the dc current programmed is exceeded, the input dc current
limit bit [IL_DC] is set and the DC-Current indicator in
Section 7 of the user registers window lights up.
The TxMask2/ILED bit is set depending on the mode of GPIO2
set in Section 3 of the window. If GPIO2 is set to Indicator
(ILED mode) and there is a fault with the ILED, the TxMask2/
ILED bit is set. If GPIO2 is set to TxMASK2 and a TxMaSK2
event occurs during a flash, the TxMask2/ILED bit is set high.
Faults that are indicated by lighted LEDs in Section 7 of the
user registers window are cleared after you click the Read 0x05
button.
LOW VBAT
Set the low VBAT threshold and the desired current setting in
Section 4 of the user registers window. The battery voltage can
be reduced during a flash event, which causes the flash current
to be reduced to the programmed level and the low battery
status bit to be set to indicate that the part has entered low
battery mode and the current is reduced.
DC CURRENT LIMIT
The dc current limit feature prevents the battery current from
exceeding the programmed level set in Section 4 of the user
registers window. Set DC-Current Limit to Enabled in Section 4,
and set the maximum current level using DC Current Limit.
During a flash event, if the DC current limit is reached, the DC
current limit status bit is set in the fault register. Click the Read
0x05 button at the bottom right of the user registers window to
check the status after a flash event. The flash current shown in
Section 2 of the window is updated with the actual current into
the LED during the flash event. For example, the user may
program 1.5 A for the flash current but the Flash Current bar
shows 1.3 A at the end of the Flash event. 1.3 A is the actual
current delivered to the LED. Bits I_FL in Register 0x03 are
automatically read back during a flash event to update the user
registers window.

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EVALUATION BOARD OVERVIEW
MOTHERBOARD
SET I/O VOLTAGE
2.8V (DEFAULT) OR 1.8V
TORCH AND STROBE: USE PUSH-BUTTONS FOR
EXTERNAL TORCH OR FLASH. BUTTONS MUST
BE ENABLED FROM SOFTWARE GUI.
CY68013 A MICROCONTROLLER:
PROVIDES USB-TO-I
2
C CONVERSION
USB MINI B TYPE
CONNECTOR
ADP3303: 3.3V, 200mA
LDO SUPPLY FOR
CY68013A
USB SUPPLY
FOR DAUGHTERBOARD
(FOR DEMONSTRATION)
ADP1712 LDOs FOR VDDIO
2.8V OR 1.8V
CONNECTS MOTHERBOARD
SIGNALS TO DAUGHTERBOARD
09024-009
Figure 9. Motherboard
The ADP1650 motherboard provides the interface signals to the
ADP1650 flash driver IC. These signals are controlled via the
evaluation software GUI.
The Cypress Semiconductor Corporation CY68013A provides
the USB interface and I2C signals. The selected I2C frequency is
400 kHz. The EEPROM U5 M24C64 provides the USB address
of the board.
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.

Evaluation Board User Guide UG-139
Rev. A | Page 9 of 16
DEMO DAUGHTERBOARD
LED SUBBOARD
2.7V – 5.0V
3A
MEASURE I
BAT
WITH SCOPE
AND CURRENT PROBE
MEASURE I
LED
WITH SCOPE
AND CURRENT PROBE
SHORT
THICK
CABLES
GPIO2 FUNCTION
GPIO2 > I
LED
GPIO2 > TxMASK2
NO JUMPER
GPIO2 > USED FOR EXTERNAL
VOLTAGE MODE OF ADC
R3 = 0Ω
09024-010
Figure 10. Demonstration Daughterboard
The ADP1650 evaluation daughterboard is designed to quickly
evaluate key parameters of the ADP1650 IC. Headers are
available to measure currents using a current probe (preferred)
or ammeter.
Connect a power supply or Li-Ion battery with >3 A capability
to J5. Up to 2.5 A can be drawn from the battery; therefore,
short thick cables (provided) are recommended to minimize the
IR drops. A high current can cause a big IR drop, and VIN of
ADP1650 can be low enough to put the part into UVLO.
IBAT
IBAT is the battery current and can be measured by using an
ammeter or current loop across J1.
ILED
ILED is the LED current and can be measured by using an
ammeter or current loop across J2.
VIN
A VIN sense point is provided at TP21. This should be used to
sense the true voltage at the ADP1650 supply for measuring
LED power efficiency.
High VFLEDs
The LED subboard (at U2 in Figure 10) can be replaced with a
different subboard containing various LEDs with higher VFto
test the performance over the full range of LEDs used in a
production environment.

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POWER BOARD FROM USB PORT ONLY
To power the motherboard via the USB for demonstration
purposes without using an external supply, short Pin 1 and
Pin 2 on both of the LK3 jumpers on the motherboard. Short
Pin 1 and Pin 2 of J5 on the daughterboard. Figure 11 illustrates
jumper settings for USB powered operation. Ensure that the
LED current is less than 200 mA to avoid exceeding the 500 mA
current limit of the USB.
TORCH AND STROBE: USE PUSH-BUTTONS FOR
EXTERNAL TORCH OR FLASH. BUTTONS MUST
BE ENABLED FROM SOFTWARE GUI.
CY68013 A MICROCONTROLLER:
PROVIDES USB-TO-I2C CONVERSION
USB SUPPLY
FOR DAUGHTERBOARD
(FOR DEMONSTRATION)
USB MINI B TYPE
CONNECTOR
09024-011
Figure 11. Powering the ADP1650 from a USB Port