Texas Instruments BQ24022 bqTINY-II Evaluation Module BQ24022EVM BQ24022EVM 데이터 시트
제품 코드
BQ24022EVM
SLUU156 – April 2003
4
bq24022 (bqTINY
-II) Evaluation Module
bq24022 (bqTINY
-II) Evaluation Module
Portable Power
Contents
1
Introduction
4
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2
Test Summary
5
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3
Schematic
9
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4
Physical Layouts
10
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5
List of Materials
12
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6
References
12
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1
Introduction
This user’s guide describes the bq24022 (bqTINY
-II) Evaluation Module. The EVM provides a
convenient method for evaluating the performance of a charge management solution for
portable applications using the bq24022 product family. A complete designed and tested charger
is presented. The charger is designed to deliver up to 1.0 A of continuous charge current for
single-cell Li-Ion or Li-Pol applications using a DC power supply. The charger is programmed
from the factor to deliver 0.7-A of charging current.
portable applications using the bq24022 product family. A complete designed and tested charger
is presented. The charger is designed to deliver up to 1.0 A of continuous charge current for
single-cell Li-Ion or Li-Pol applications using a DC power supply. The charger is programmed
from the factor to deliver 0.7-A of charging current.
1.1
Background
The bqTINY
-II series are highly integrated and flexible Li-Ion linear charge and system power
management devices targeted at space limited charger applications. The bqTINY-II series offer
integrated USB-port and ac-adapter supply management with autonomous power-source
selection, power FET and current sensor, high-accuracy current and voltage regulation, charge
status, and charge termination, in a single monolithic device. The bqTINY-II automatically
selects the USB-port or the ac-adapter as the power source for the system. In the USB
configuration, the host can select from the two preset charge rates of 100 mA and 500 mA. In
the ac-adapter configuration an external resistor sets the magnitude of the system or charge
current. The bqTINY-II charges the battery in three phases: conditioning, constant current, and
constant voltage. Charge is terminated based on minimum current. An internal charge timer
provides a backup safety for charge termination. The bqTINY-II automatically restarts the charge
if the battery voltage falls below an internal threshold. The bqTINY-II automatically enters sleep
mode when both supplies are removed.
integrated USB-port and ac-adapter supply management with autonomous power-source
selection, power FET and current sensor, high-accuracy current and voltage regulation, charge
status, and charge termination, in a single monolithic device. The bqTINY-II automatically
selects the USB-port or the ac-adapter as the power source for the system. In the USB
configuration, the host can select from the two preset charge rates of 100 mA and 500 mA. In
the ac-adapter configuration an external resistor sets the magnitude of the system or charge
current. The bqTINY-II charges the battery in three phases: conditioning, constant current, and
constant voltage. Charge is terminated based on minimum current. An internal charge timer
provides a backup safety for charge termination. The bqTINY-II automatically restarts the charge
if the battery voltage falls below an internal threshold. The bqTINY-II automatically enters sleep
mode when both supplies are removed.