Datasheet > VPSC1534-41

VPSC1534-41

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
杰尔 - AGERE		电池
页数	文件大小	规格书
8页	1355K
描述
Lithium-Ion Linear Battery Charger

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VPSC1534-41 数据手册

Preliminary Data Sheet

April 2003

PSC1534 Lithium-Ion Linear Battery Charger

Features

Applications

■ Low external component count and small footprint

■ Any application that requires a compact, low-cost

solution for Li-Ion battery charging

■ Charge termination indication and manual shut-

down using PROG pin

Typical Application

■ Programmable charge current: 200 mA to 800 mA

■ 4.1 V or 4.2 V preset voltages

VIN

5 V

■ Automatic trickle charging at IPROG/10 for heavily

discharged batteries requires no additional exter-

nal components

ISENSE

VCC

1 µF

PSC1534

GND DRIVE

FMMT549

IBAT = 500 mA

10 kΩ

■ Very low quiescent battery current during shut-

down and standby (charger removed)

PROG

BAT

To A/D

SINGLE

Li-Ion

BATTERY

10 µF

RPROG

3 kΩ

■ Charger undervoltage lockout and battery over-

voltage lockout

■ Overcurrent/overtemperature protection

■ Low-profile (1 mm) SOT-23 package

Figure 1. 500 mA Li-Ion Battery Charger

5 V

Description

VBAT

4 V

The PSC1534 is a constant-current/constant-voltage

Li-Ion battery charger controller that is functionally

equivalent and performance equivalent to the

LTC^®1734. As an enhancement, the PSC1534 also

includes automatic detection and trickle charging of

deeply discharged batteries (VBAT <2.42 V).

3 V

CONSTANT

CURRENT

CONSTANT

VOLTAGE

2 V

1.5 V

1 V

VPROG

The PSC1534 allows charge current programming

using a single external resistor, RPROG. The voltage

on the PROG pin is proportional to the charging cur-

rent at the ISENSE pin, allowing the user to use an

external A/D to monitor charging progress. A low bat-

tery drain (BAT pin) manual shutdown state can be

forced by floating the PROG pin. When the input sup-

ply (VIN) is removed, the PSC1534 enters a very low-

current sleep mode, during which BAT input supply

current is <1 µA.

0 V

CHARGING

COMPLETE

CHARGING

BEGINS

Figure 2. PROG Pin Indicates Charge Status

12 3 4 5 6 7 8

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