Texas Instruments Evaluation Module for BQ24620 Multi Cell Synchronous Switch-Mode Charger BQ24620EVM BQ24620EVM 데이터 시트
제품 코드
BQ24620EVM
Introduction
www.ti.com
1
Introduction
1.1
EVM Features
•
Evaluation Module for bq24600/bq24620/bq24640
•
High Efficiency Synchronous Buck Charger
•
User-programmable up to 26V Battery Voltage
•
AC Adapter Operating Range 5V–28V
•
LED Indication for Control and Status Signals.
•
Test Points for Key Signals Available for Testing Purpose. Easy Probe Hook-up.
•
Jumpers Available. Easy to Change Connections.
1.2
General Description
The bq24600 is a highly integrated Li-ion or Li-polymer switch-mode battery charge controller. The
bq24620 is highly integrated switch-mode battery charge controller designed specifically to charge Lithium
Phosphate battery chemistries. The bq24640 is highly integrated super capacitor switch-mode charge
controller.
bq24620 is highly integrated switch-mode battery charge controller designed specifically to charge Lithium
Phosphate battery chemistries. The bq24640 is highly integrated super capacitor switch-mode charge
controller.
The devices offer a constant-frequency synchronous PWM controller with high accuracy charge current
and voltage regulation, adapter current regulation, termination, charge preconditioning, and charge status
monitoring, The bq24600/bq24620 charges the battery in three phases: preconditioning, constant current,
and constant voltage. Charge is terminated when the current reaches a minimum user-selectable level. A
programmable charge timer provides a safety backup for charge termination.
and voltage regulation, adapter current regulation, termination, charge preconditioning, and charge status
monitoring, The bq24600/bq24620 charges the battery in three phases: preconditioning, constant current,
and constant voltage. Charge is terminated when the current reaches a minimum user-selectable level. A
programmable charge timer provides a safety backup for charge termination.
The bq24600/bq24620 automatically restarts the charge cycle if the battery voltage falls below an internal
threshold, and enters a low-quiescent current sleep mode when the input voltage falls below the battery
voltage.
threshold, and enters a low-quiescent current sleep mode when the input voltage falls below the battery
voltage.
For details, see bq24600 (
); BQ24620 (
) and bq24640 data sheet.
1.3
I/O Description
Table 1. I/O description
Jack
Description
J1 – ACPWR
AC adapter, positive output
J1 – GND
AC adapter, negative output
J2 – BATDRV_EXT
External BATDRV signal
J2 – ACDRV_EXT
External ACDRV signal
J2 – GND
Ground
J3 – VSYS
Connected to system
J3 – VBAT
Connected to battery pack
J3 – GND
Ground
J3 – TS
Temperature Qualification Voltage Input
J4 – GND
External power supply, negative output
J4 – ISET1
Charge Current Program Pin
J4 – VEXT
External power supply, positive output
J5 – PG
Power Good (active low)
J5 – CHGEN
Charge-enable active-HIGH logic input.
J5 – VREF
IC reference voltage VREF
J5 – GND
Ground
JP1 – BATDRV_EXT
External BATDRV signal
JP1 – BATDRV
BATDRV net
JP1 – BATDRV_IN
Internal BATDRV signal
JP2 – ACDRV_EXT
External ACDRV signal
2
bq24600/20/40 EVM (HPA421) Multi Cell Synchronous Switch-Mode Charger
SLUU410 – February 2010
Copyright © 2010, Texas Instruments Incorporated