Texas Instruments Evaluation Module for BQ24172 1.6-MHz Synchronous Switch-Mode Li-Ion and Li-Polymer Battery Charger BQ BQ24172EVM-706-15V 데이터 시트
제품 코드
BQ24172EVM-706-15V
Introduction
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1
Introduction
1.1
EVM Features
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Evaluation module for bq24171 and bq24172
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Stand-alone synchronous switch-mode, battery-charge
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Integrated N-MOSFETs and power path selector
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Resistor-programmable up to 12.6-V battery voltage
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Input operating range: 4.5 V–16 V
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LED indication for charge status
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Test points for key signals available for testing purposes; easy probe hook-up.
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Jumpers available; easy-to-change setting
1.2
General Description
The bq24171 and bq24172 are highly integrated stand-alone Li-ion and Li-polymer switch-mode,
battery-charge with two integrated N-channel power MOSFETs and power path selector gate driver. They
offer a constant-frequency synchronous PWM controller with high-accuracy regulation of input current,
charge current and voltage. They also provide battery detection, preconditioning, charge termination, and
charge status monitoring. Additionally, the bq2471 monitors the battery pack temperature and allows
change only in a JEITA profile compatible window with lower change current at a low temperature and a
lower change voltage at a high temperature.
battery-charge with two integrated N-channel power MOSFETs and power path selector gate driver. They
offer a constant-frequency synchronous PWM controller with high-accuracy regulation of input current,
charge current and voltage. They also provide battery detection, preconditioning, charge termination, and
charge status monitoring. Additionally, the bq2471 monitors the battery pack temperature and allows
change only in a JEITA profile compatible window with lower change current at a low temperature and a
lower change voltage at a high temperature.
The bq24171 and bq24172 automatically enter a low-quiescent-current sleep mode when the input voltage
falls below the battery voltage. The bq24171 and bq24172 are adjustable for up to three series Li+ cells,
supporting up to a 4-A charge current. The bq24171 and bq24172 are available in a 24-pin, 3.5-mm x
5.5-mm
falls below the battery voltage. The bq24171 and bq24172 are adjustable for up to three series Li+ cells,
supporting up to a 4-A charge current. The bq24171 and bq24172 are available in a 24-pin, 3.5-mm x
5.5-mm
2
, thin QFN package.
For details, see the bq24171 data sheet (
1.3
I/O Description
Table 1. I/O Description
Jack
Description
J1–VIN
Positive input
J1–PGND
Negative input
J2–VSYS
Connected to system
J2–VBAT
Connected to charger output
J2–PGND
Ground
J2–TS_EXT
Temperature qualification voltage Input
2
bq24171EVM JEITA Compliant and bq24172EVM Stand-Alone Synchronous, SLUU462A – November 2010 – Revised February 2011
Switch-Mode, Battery-Charge With Integrated N-MOSFETs and Power Path
Switch-Mode, Battery-Charge With Integrated N-MOSFETs and Power Path
Selector
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