Texas Instruments Evaluation Module for BQ24172 1.6-MHz Synchronous Switch-Mode Li-Ion and Li-Polymer Battery Charger BQ BQ24172EVM-706-15V Datenbogen
Produktcode
BQ24172EVM-706-15V
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Test Summary
2.7
Procedure
Disconnect the load and power supply. Use diode-function of multimeter to check the resistance between
J1-VIN and J2-VSYS. Pass only if both OPEN for bi-direction (positive J1-VIN and negative on J2-VSYS;
negative J1-VIN and positive on J2-VSYS).
J1-VIN and J2-VSYS. Pass only if both OPEN for bi-direction (positive J1-VIN and negative on J2-VSYS;
negative J1-VIN and positive on J2-VSYS).
2.7.1
Power Supply and VREF
Ensure that
steps are followed.
Disconnect LOAD#1#2. Turn on PS#1 (6 V for 001 and 16 V for 002 / 003).
Measure
→
V(J2(VSYS)) = 6 V ±500 mV (001)
V(J2(VSYS)) = 16 V ±500 mV (002 / 003)
Measure
→
V(J2(VBAT)) = 0.5 V ±500 mV
Measure
→
V(TP(VREF)) = 3.3 V ±200 mV
Measure
→
V(TP(REGN)) = 0.5 V ±500 mV
2.7.2
Charger Enable and Battery Detection
Connect 2-3 of JP1 (Internal TS); short JP4 (Charger Enable)
Measure
→
V(TP(VREF)) = 3.3 V ±200 mV
Measure
→
V(TP(REGN)) = 6 V ±200 mV
Observe
→
V(J2(VBAT)) = 4.2 V ±200 mV (001)
V(J2(VBAT)) = 12.6 V ±200 mV (002 / 003)
Observe
→
D1 (/STAT) BLINK
2.7.3
Charge Current/Voltage Regulation and Battery Temperature Qualification
Reconnect LOAD#2, and turn on. Use the constant voltage mode. Set the output voltage to 2.5 V for 001
and 8 V for 002.
and 8 V for 002.
Measure
→
I(J2(VBAT)) = 0.2 A ±100 mA
Observe
→
D1 (/STAT) ON
Increase the voltage of LOAD#2 to 3.5 V for 001 and 10.5 V for 002 / 003.
Measure
→
I(J2(VBAT)) = 2 A ±200 mA
Observe
→
D1 (/STAT) ON
Open 2-3 of JP1 (External TS)
Measure
→
I(J2(VBAT)) = 0 A ±100 mA
Observe
→
D1 (/STAT) BLINK
Connect 2-3 of JP1 (Internal TS)
Measure
→
I(J2(VBAT)) = 2 A ±200 mA
Observe
→
D1 (/STAT) BLINK
7
SLUU462A – November 2010 – Revised February 2011 bq24171EVM JEITA Compliant and bq24172EVM Stand-Alone Synchronous,
Switch-Mode, Battery-Charge With Integrated N-MOSFETs and Power Path
Selector
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