Texas Instruments bq2416063EVM User manual

User's Guide
SLUU668–March 2012
QFN-Packaged bq24160/161/162A/63EVM
Evaluation Modules
The bq24160/161/162A/63EVM evaluation module is a complete charger module for evaluating compact,
flexible, high-efficiency, USB-friendly, switch-mode, charge-management solutions for single-cell, Li-ion
and Li-polymer batteries used in a wide range of portable applications.
Contents
1 Introduction .................................................................................................................. 2
1.1 bq2416x IC Features .............................................................................................. 2
1.2 bq24160/161/163/168EVM Features ............................................................................ 2
1.3 Schematic ........................................................................................................... 3
1.4 I/O Description ...................................................................................................... 4
1.5 Test Points .......................................................................................................... 4
1.6 Control and Key Parameters Setting ............................................................................ 5
1.7 Recommended Operating Conditions ........................................................................... 5
2 Test Summary ............................................................................................................... 6
2.1 Definitions ........................................................................................................... 6
2.2 Recommended Test Equipment ................................................................................. 6
2.3 Recommended Test Equipment Setup .......................................................................... 8
2.4 Recommended Test Procedure ................................................................................ 10
3 Printed-Circuit Board Layout Guideline ................................................................................. 12
4 Bill of Materials and Board Layout ...................................................................................... 13
4.1 Bill of Materials .................................................................................................... 13
4.2 Board Layout ...................................................................................................... 15
List of Figures
1 HPA742A Schematic ....................................................................................................... 3
2 BAT_Load (PR1010) Schematic.......................................................................................... 7
3 Connections of HPA172 Kit................................................................................................ 8
4 Original Test Setup for bq24160/161/163/168EVM (HPA742)........................................................ 9
5 Main Window of bq2416xSW Evaluation Software ................................................................... 10
6 Top Assembly Layer ...................................................................................................... 15
7 Top Layer .................................................................................................................. 16
8 First Internal Layer ........................................................................................................ 17
9 Second Internal Layer .................................................................................................... 18
10 Bottom Layer............................................................................................................... 19
List of Tables
1 Bill of Materials - HPA742 ............................................................................................... 13
I2C is a trademark of Philips Electronics N.V.
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Introduction www.ti.com
1 Introduction
1.1 bq2416x IC Features
The bq24160/161/163/168 integrates a synchronous PWM controller, power MOSFETs, input-current
sensing, high-accuracy current and voltage regulation, charge termination and power path management
into a QFN package. The charge parameters can be programmed through an I2C interface. Key integrated
circuit (IC) features include:
• High-efficiency, fully integrated, NMOS-NMOS, synchronous buck charger with 1.5-MHz frequency
• Integrated power FETs for up to 2.5-A charge rate
• Power path management between battery and system voltages
For details, see the bq24160/161/163/168 data sheet (SLUSAO0).
1.2 bq24160/161/163/168EVM Features
The bq24160/161/163/168EVM evaluation module (EVM) is a complete charger module for evaluating
compact, flexible, high-efficiency, USB-friendly, switch-mode battery charge and power path management
solutions for single-cell, Li-ion and Li-polymer battery-powered systems used in a wide range of portable
applications. Key EVM features include:
• Input power connectors for both USB input and ac adapter
• Programmable battery voltage, charge current, input current, and status via I2C™ interface
• IN operating range of 4.2 V – 10 V (bq24160/161/163EVM) or 4.2 V – 6 V (bq24168)
• USB operating range of 4.2 V – 6 V
• LED indication for status signals
• Test points for key signals available for testing purposes. Easy probe hook-up
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www.ti.com Introduction
1.3 Schematic
Figure 1. HPA742A Schematic
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Introduction www.ti.com
1.4 I/O Description
Header/Terminal Block Description
J1–TS External thermistor positive terminal
J1–GND Ground terminal for external thermistor
J2–BAT Battery positive header
J3-BAT Battery positive terminal
J3-GND Battery negative terminal
J4-IN Adapter positive header
J5-IN Adapter positive terminal
J5-GND Adapter negative terminal
J6-GND Battery negative terminal
J7-GND Adapter negative terminal
J8-USB USB positive header
J9-USB USB positive terminal
J9-GND USB negative terminal
J10-SYS System output positive header
J11-GND USB negative header
J12 USB miniconnector
J13-SYS System output positive terminal
J13-GND System output negative terminal
J14-GND System output negative header
J15-DRV DRV reference voltage positive header
J16-DRV DRV reference voltage positive terminal
J16-GND DRV reference voltage negative terminal
J17 USB-TO-GPIO box connector
1.5 Test Points
Test Point Description
TP1 Kelvin to VIN
TP2 STAT
TP3 Kelvin to BAT
TP4 Kelvin to USB
TP5 DRV
TP6 INT
TP7 Kelvin to SYS
TP8 GND
TP9 GND
TP10 SW
TP11 SCL
TP12 SDA
TP13 TS
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www.ti.com Introduction
1.6 Control and Key Parameters Setting
Jumper Description Default Factory Setting
1-2 (TS = INT): Connects a potentiometer to the TS so that the potentiometer can
emulate a thermistor. The potentiometer has been preset to approximately 3.4 kΩso
that the TS voltage is 0.5 x V (DRV).
JP1 1-2 (TS = INT)
2-3 (TS = EXT): Connects the TS pin to an external thermistor. The resistor divider
formed by R1 and R3 has been sized to accommodate a 10-kΩthermistor. If a different
thermistor is used, R1 and R3 must be resized.
1-2 (FET GATE = SYS): External PFET's gate tied to SYS and therefore disabled.
JP2 2-3 (FET GATE = BGATE): External PFET's gate tied to BGATE pin and therefore 2-3 (FET GATE = BGATE)
controlled by IC.
Shorting jumper for USB data lines DM (D-) and DP (D+). When shorted, USB input
JP3 Shorted
current limit defaults to 1.5 A. Otherwise, USB100 mode is selected.
bq24161 and bq24168 only
1-2 (PSEL = LO): Indicates that an ac adapter is connected to the USB input and sets
JP4 the USB input current limit to 1.5 A. 2-3 (PSEL = HI)
2-3 (PSEL = HI): Indicates that a USB source is connected to the USB input and sets
the input current limit to 500 mA.
1-2 (CD = LO): Charge disable low for normal operation
JP5 1-2 (CD = LO)
2-3 (CD = HI): Charge disable high to disable charge and enter Hi-Z mode
1.7 Recommended Operating Conditions
Min Typ Max Unit
Supply voltage, VIN Input voltage from ac adapter (bq24160/161/163) 4.2 10 V
Supply voltage, VIN Input voltage from ac adapter (bq24168) 4.2 6 V
USB voltage, VUSB Input voltage from USB or equivalent supply 4.2 6 V
Battery voltage, VBAT Voltage applied at VBAT terminal of J8 0 3-4.2 4.44 V
Supply current, IIN(MAX) Maximum input current from ac adapter input 1.5 2.5 A
Supply current, IUSB(MAX) Maximum input current from USB input 0.1 0.5 1.5 A
Charge current, Ichrg Battery charge current 1 2.5 A
Operating junction temperature range, TJ0 125 °C
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Test Summary www.ti.com
2 Test Summary
This procedure describes one test configuration of the HPA742 evaluation board for bench evaluation.
2.1 Definitions
This procedure details how to configure the HPA742 evaluation board. The following naming conventions
are followed. See the bq24160/161/163/168 QFN EVM schematic for details.
VXXX : External voltage supply name (VADP, VBT, VSBT)
LOADW: External load name (LOADR, LOADI)
V(TPyyy): Voltage at internal test point TPyyy. For example, V(TP12) means the voltage at
TP12.
V(Jxx): Voltage at header Jxx
V(TP(XXX)): Voltage at test point XXX. For example, V(ACDET) means the voltage at the test
point which is marked as ACDET.
V(XXX, YYY): Voltage across point XXX and YYY
I(JXX(YYY)): Current going out from the YYY terminal of header XX
Jxx(BBB): Terminal or pin BBB of header xx
JPx ON : Internal jumper Jxx terminals are shorted.
JPx OFF: Internal jumper Jxx terminals are open.
JPx (-YY-) ON: Internal jumper Jxx adjacent terminals marked as YY are shorted
Measure: →A,B Check specified parameters A, B. If measured values are not within specified limits,
the unit under test has failed.
Observe →A,B Observe if A, B occur. If they do not occur, the unit under test has failed.
Assembly drawings have location for jumpers, test points, and individual components.
2.2 Recommended Test Equipment
2.2.1 Power Supplies
Power Supply #1 (PS#1) capable of supplying 6 V at 3 A is required.
If not using a battery as the load, then power supply #2 (PS#2) capable of supplying 5 V at 5-A is required
to power the circuit shown in Figure 2.
2.2.2 Load #1 Between BAT and GND
Testing with an actual battery as the load is the best way to verify operation in the system. If a batttery is
not available, then a circuit similar to the one shown in Figure 2 can simulate a battery when connected to
a power supply.
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Figure 2. BAT_Load (PR1010) Schematic
2.2.3 Load #2 Between SYS and GND
Although not required, a resistive load capable of sinking up to 3 A can be used.
2.2.4 Meters
Four equivalent voltage meters (VM#) and two equivalent current meters (CM#). The current meters must
be configured to measure 3-A current.
2.2.5 Computer
A computer with at least one USB port and a USB cable. The bq2416x evaluation software must be
properly installed.
2.2.6 HPA172 Communication Kit (USB to GPIO)
A HPA172 USB-to-I2C communication kit.
2.2.7 Software
Download the BQ2416xSW.zip file from the charger's product folder, unzip the file, and double-click on the
SETUP.EXE file. Follow the installation steps.
Because the bq24160, bq24161, and bq24163 have the watchdog timers enabled, it is recommended that
you set the software's Reset Watchdog Timer to reset every 5 seconds. Otherwise, after 30 seconds of
operation, the integrated circuit (IC) enters Default mode. Note that the 27-minute safety timer is not reset
by this function and eventually times out if charging does not complete, unless the Safety Timer Time
Limit is expanded or disabled via the GUI. One way to reset the safety timer is to allow the 30-second
watchdog timer to expire. See Figure 3 in the data sheet for more information about the timers.
Also, it is generally helpful to set the AutoRead and Write On Change functions, in the upper left of the
GUI window, to ON. The AutoRead function periodically updates the GUI with the IC status. The Write On
Change function writes any changes to the GUI check boxes, drop-down boxes, and registers to the IC.
Otherwise, the user is responsible for periodically pressing the READ button to find the IC instantaneous
status and WRITE button to write changes to the IC.
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To
Computer
USB port
USB Interface
Adapter
I/O
USB
Texas Instruments
© 2006
10-pin
Ribbon
Cable
To EVM
Test Summary www.ti.com
2.3 Recommended Test Equipment Setup
1. For all power connections, use short, twisted-pair wires of appropriate gauge wire for the maximum
current amount.
2. Set Power Supply #1 (PS#1) for 6-V ± 100 mVdc, 3-A ± 100-mA current limit, and then turn off supply.
3. If BAT_Load is the circuit shown in Figure 3, connect Power Supply #2 (PS#2) set to approximately 3.6
V to the input side of BAT_Load, and then turn off PS#2.
4. Connect the output side (or battery terminals) of BAT_Load in series with current meter (multimeter) #2
(CM#2) to J2 and J6 or J3 (BAT, GND). Ensure that a voltage meter is connected across J2 or TP3
and J6 or TP9 (BAT, GND).
5. Connect VM#3 across J10 or TP7 and J14 or TP9 (SYS, GND).
6. Connect VM#4 across J15 or TP5 and J14 or TP9 (DRV, GND).
7. Connect J17 to HPA172 kit by the 10-pin ribbon cable. Connect the USB port of the HPA172 kit to the
USB port of the computer. The connections are shown in Figure 3.
Figure 3. Connections of HPA172 Kit
8. Ensure jumpers are at the default factory settings per Section 1.6
9. After the preceding steps have been performed, the test setup for HPA742 is configured as is shown in
Figure 4
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AV
VM#2
CM#2
ICHRG
PS#1
A
V
VM#3
CM#1
IIN
V
+ -
VM#1
+
-
+
-
-
-+
+
VM#4
V+
-
Windows
PC
USB-TO-
GPIO
BAT_Load
PS#2
www.ti.com Test Summary
Figure 4. Original Test Setup for bq24160/161/163/168EVM (HPA742)
10. Turn on the computer.
• Open the bq2416x evaluation software. The main window of the software is shown in Figure 5.
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Test Summary www.ti.com
Figure 5. Main Window of bq2416xSW Evaluation Software
2.4 Recommended Test Procedure
The following test procedure is useful for evaluating the charger IC outside of a real system, especially
when no battery is available to connect to the output (i.e., Load #1).
2.4.1 Charge Voltage and Current Regulation of IN
1. Ensure that the Section 2.3 steps are followed.
2. Connect the output of Power Supply #1 (PS #1) in series with current meter (multimeter) #1 (CM #1) to
J4 and J7 or J5 (IN, GND).
3. Connect voltage meter 1 (VM #1) across J4 or TP1 and J7 or TP8 (IN, GND).
4. Move JP5 to HI.
5. Turn on PS #1 and PS #2 if used.
6. Return JP5 to LO.
7. Software setup:
• Press the READ button to obtain the current settings.
• Set Write On Change to ON if not already set.
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• Set Reset Watchdog Timer to update every 5 seconds.
• Set Supply Precedence to IN if not already set.
• Uncheck Disable Charging if checked.
• Check Enable STAT/INT Outputs.
• Set Battery Regulation Voltage to 4.20 V.
• Set IN Input Current Limit to 2.5 A.
• Set Charge Current to 1000 mA.
• Click the READ button at the top of the window and confirm that the previous settings remain.
8. Enable PS #2 and adjust PS #2 so that the voltage measured by VM #2, across BAT and GND,
measures 3.3 V ± 50 mV.
9. Adjust the power supply so that VM #1 still reads 6 V ± 100 mV, if necessary, then
Measure on CM#2 →ICHRG = 1000 mA ± 100 mA
Measure on CM#1 →IIN = 700 mA ± 70 mA
10. Turn off PS #1 and PS #2.
2.4.2 Charge Voltage and Current Regulation of USB
1. Be sure to follow Section 2.3 steps .
2. Connect the output of Power Supply #1 (PS #1) in series with current meter (multimeter) #1 (CM #1) to
J8 and J11 or J9 (USB, GND).
3. Connect a voltage meter 1 (VM #1) across J8 or TP4 and J11 or TP8 (USB, GND).
4. Move JP5 to HI.
5. Turn on PS #1 and PS #2 if used.
6. Return JP5 to LO.
7. Software setup:
• Press the READ button to obtain the current settings.
• Set Write On Change to ON if not already set.
• Set Reset Watchdog Timer to update every 5 seconds.
• Set Supply Precedence to USB if not already set.
• Uncheck Disable Charging if checked.
• Check Enable STAT/INT Outputs.
• Set Battery Regulation Voltage to 4.20 V.
• Set USB Input Current Limit to 1500 mA.
• Set Charge Current to 1000 mA.
• Click the READ button at the top of the window, and confirm that the previous settings remain.
8. Enable PS #2 and adjust PS #2 so that the voltage measured by VM #2, across BAT and GND,
measures 3.3 V ± 50 mV.
9. Adjust the power supply so that VM #1 still reads 6 V ± 100 mV if necessary then
Measure on CM#2 →ICHRG = 1000 mA ± 100 mA
Measure on CM#1 →IIN = 700 mA ± 70 mA
10. Turn off PS #1 and PS #2.
2.4.3 Helpful hints
1. To observe the taper current as the battery voltage approaches the set regulation voltage, allow the
battery to charge or, if using BAT_Load (PR1010), slowly increase the PS #2 voltage powering
BAT_Load (PR1010). Use VM #2 across BAT and GND to measure the battery voltage seen by the IC.
2. To observe the VINDPM function, lower the current limit on PS #1.
3. To observe battery supplement mode, apply a resistive load across SYS and GND that is higher than
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Printed-Circuit Board Layout Guideline www.ti.com
the maximum charge current.
3 Printed-Circuit Board Layout Guideline
1. To obtain optimal performance, the power input capacitors, connected from the PMID input to PGND,
must be placed as close as possible to the bq2416x.
2. Place a 4.7-µF input capacitor as close to PMID pin and PGND pin as possible to make the high-
frequency, current-loop area as small as possible. Place 1-µF input capacitor GNDs as close to the
respective PMID capacitor GND and PGND pins as possible to minimize the ground difference
between the input and PMID_.
3. The local bypass capacitor from SYS to GND must be connected between the SYS pin and PGND of
the IC. The intent is to minimize the current path loop area from the SW pin through the LC filter and
back to the PGND pin.
4. Place all decoupling capacitors close to their respective IC pins and as close as possible to PGND (do
not place components such that routing interrupts power stage currents). All small control signals must
be routed away from the high-current paths.
5. The printed-circuit board must have a ground plane (return) connected directly to the return of all
components through vias (two vias per capacitor for power-stage capacitors, one via per capacitor for
small-signal components). It is also recommended to put vias inside the PGND pads for the IC, if
possible. A star ground design approach is typically used to keep circuit block currents isolated (high-
power/low-power small-signal) which reduces noise-coupling and ground-bounce issues. A single
ground plane for this design gives good results. This small layout and a single ground plane eliminates
ground-bounce issues, and having the components segregated minimizes coupling between signals.
6. The high-current charge paths into IN, USB, BAT, SYS, and from the SW pins must be sized
appropriately for the maximum charge current in order to avoid voltage drops in these traces. The
PGND pins must be connected to the ground plane to return current through the internal low-side FET.
7. For high-current applications, the balls for the power paths must be connected to as much copper in
the board as possible. This allows better thermal performance because the board conducts heat away
from the IC.
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www.ti.com Bill of Materials and Board Layout
4 Bill of Materials and Board Layout
4.1 Bill of Materials
Table 1. Bill of Materials - HPA742
Count RefDes Value Description Size Part Number MFR
160 161 168 163
2 2 2 2 C1, C3 1 µF Capacitor, Ceramic, 25V, X5R, 10% 603 Std Std
2 2 2 2 C2, C5 1 µF Capacitor, Ceramic, 6.3V, X5R, 10% 402 Std Std
2 2 2 2 C4, C12 47uF Capacitor, Ceramic, 6.3V, X5R, 20% 1206 Std Std
0 0 0 0 C6, C10 Open Capacitor, Ceramic 1206 Std Std
2 2 2 2 C7, C8 4.7 µF Capacitor, Ceramic, 25V, X5R, 10% 805 Std Std
1 1 1 1 C9 0.01 µF Capacitor, Ceramic, 16V, X7R, 10% 603 Std Std
1 1 1 1 C11 10 µF Capacitor, Ceramic, 10V, X5R, 10% 603 Std Std
2 2 2 2 D1, D2 Green Diode, LED, Green, 2.1-V, 20-mA, 6-mcd 603 LTST-C190GKT Liteon
6 6 6 6 J1, J3, J5, J9, J13, J16 ED555/2DS Terminal Block, 2-pin, 6-A, 3.5mm 0.27 x 0.25 ED555/2DS OST
0 0 0 0 J12 UX60-MB-5ST Connector, Recpt, USB-B, Mini, 5-pins, SMT 0.354 X 0.303 Inches UX60-MB-5ST Hiroise Electrical Co
1 1 1 1 J17 N2510-6002-RB Connector, Male Straight 2x5 pin, 100mil spacing, 4 0.338 x 0.788 inch N2510-6002-RB 3M
Wall
10 10 10 10 J2, J4, J6, J7, J8, J10, J11, PEC02SAAN Header, Male 2-pin, 100mil spacing 0.100 inch x 2 PEC02SAAN Sullins
J14, J15, J18
3 3 3 3 JP1, JP2, JP5 PEC03SAAN Header, Male 3-pin, 100mil spacing, 0.100 inch x 3 PEC03SAAN Sullins
1 1 1 1 JP3 PEC02SAAN Header, Male 2-pin, 100mil spacing, 0.100 inch x 2 PEC02SAAN Sullins
0 1 1 0 JP4 PEC03SAAN Header, Male 3-pin, 100mil spacing, 0.100 inch x 3 PEC03SAAN Sullins
1 1 1 1 L1 1.5µH Inductor, SMT, 3.5A, 70 mW 4.1x4.4 mm SPM4012T-1R5M TD Alternate: Toko
Alternate: FDSD0415-
H-1R5M
1 1 1 1 Q1 CSD25401Q3 MOSFET, PChan, -20V, 60A, 8.7 mΩQFN3.3X3.3mm CSD25401Q3 TI
1 1 1 1 R1 1870 Resistor, Chip, 1/16W, 1% 603 Std Std
1 1 1 1 R2 50.0k Potentiometer, 3/8 Cermet, 12-Turn 0.25x0.17 inch 3266W-1-503LF Bourns
1 1 1 1 R3 4120 Resistor, Chip, 1/16W, 1% 603 Std Std
0 1 1 0 R4 0 Resistor, Chip, 1/16W, 1% 603 Std Std
2 2 2 2 R5, R6 1.50K Resistor, Chip, 1/16W, 1% 603 Std Std
2 2 2 2 R7, R8 200 Resistor, Chip, 1/16W, 1% 603 Std Std
7 7 7 7 TP1, TP2, TP3, TP4, TP6, 5000 Test Point, Red, Thru Hole Color Keyed 0.100 x 0.100 inch 5000 Keystone
TP7, TP10
2 2 2 2 TP8, TP9 5001 Test Point, Black, Thru Hole Color Keyed 0.100 x 0.100 inch 5001 Keystone
4 4 4 4 TP5, TP11, TP12, TP13 5002 Test Point, White, Thru Hole Color Keyed 0.100 x 0.100 inch 5002 Keystone
1 0 0 0 U1 BQ24160RGE IC, 2.5A, Dual-Input, Single Cell Switch-mode Li-Ion QFN3.3X3.3mm BQ24160RGE TI
BATTERY CHARGER with
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Bill of Materials and Board Layout www.ti.com
Table 1. Bill of Materials - HPA742 (continued)
Count RefDes Value Description Size Part Number MFR
160 161 168 163
0 1 0 0 U1 BQ24161RGE IC, 2.5A, Dual-Input, Single Cell Switch-mode Li-Ion QFN3.3X3.3mm BQ24161RGE TI
BATTERY CHARGER with
0 0 1 0 U1 BQ24168RGE IC, 2.5A, Dual-Input, Single Cell Switch-mode Li-Ion QFN3.3X3.3mm BQ24168RGE TI
BATTERY CHARGER with
0 0 0 1 U1 BQ24163RGE IC, 2.5A, Dual-Input, Single Cell Switch-mode Li-Ion QFN3.3X3.3mm BQ24163RGE TI
BATTERY CHARGER with
4 5 5 4 — Shunt, 100-mil, Black 0.100 929950-00 3M
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4.2 Board Layout
Figure 6. Top Assembly Layer
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Figure 7. Top Layer
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Figure 8. First Internal Layer
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Figure 9. Second Internal Layer
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Figure 10. Bottom Layer
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Evaluation Board/Kit Important Notice
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES
ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have
electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental
measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does
not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling
(WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.
Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from
the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER
AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive.
TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or
services described herein.
Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. This
notice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/or
safety programs, please contact the TI application engineer or visit www.ti.com/esh.
No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or
combination in which such TI products or services might be or are used.
FCC Warning
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES
ONLY and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radio
frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules, which are
designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may
cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may
be required to correct this interference.
EVM Warnings and Restrictions
It is important to operate this EVM within the input voltage range of 4 V to 6 V and the output voltage range of 0 V to 4.44 V .
Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions
concerning the input range, please contact a TI field representative prior to connecting the input power.
Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM.
Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification,
please contact a TI field representative.
During normal operation, some circuit components may have case temperatures greater than 65°C. The EVM is designed to operate
properly with certain components above 125°C as long as the input and output ranges are maintained. These components include but are
not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified
using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation,
please be aware that these devices may be very warm to the touch.
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