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PSC1534 参数 Datasheet PDF下载

PSC1534图片预览
型号: PSC1534
PDF下载: 下载PDF文件 查看货源
内容描述: 锂离子电池线性充电器, [Lithium-Ion Linear Battery Charger]
分类和应用: 电池
文件页数/大小: 8 页 / 1355 K
品牌: AGERE [ AGERE SYSTEMS ]
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Preliminary Data Sheet
April 2003
PSC1534 Lithium-Ion Linear Battery Charger
Features
s
s
Applications
s
Low external component count and small footprint
Charge termination indication and manual shut-
down using PROG pin
Programmable charge current: 200 mA to 800 mA
4.1 V or 4.2 V preset voltages
Automatic trickle charging at I
PROG
/10 for heavily
discharged batteries requires no additional exter-
nal components
Very low quiescent battery current during shut-
down and standby (charger removed)
Charger undervoltage lockout and battery over-
voltage lockout
Overcurrent/overtemperature protection
Low-profile (1 mm) SOT-23 package
Any application that requires a compact, low-cost
solution for Li-Ion battery charging
s
s
s
Typical Application
V
IN
5V
3
1
µF
10 kΩ
2
I
SENSE
1
FMMT549
I
BAT
= 500 mA
+
SINGLE
Li-Ion
BATTERY
V
CC
PSC1534
6
GND DRIVE
BAT 5
s
To A/D
4 PROG
R
PROG
3 kΩ
10
µF
s
s
s
Figure 1. 500 mA Li-Ion Battery Charger
5V
V
BAT
(V)
Description
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 (V
BAT
<2.42 V).
The PSC1534 allows charge current programming
using a single external resistor, R
PROG
. The voltage
on the PROG pin is proportional to the charging cur-
rent at the I
SENSE
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 (V
IN
) is removed, the PSC1534 enters a very low-
current sleep mode, during which BAT input supply
current is <1
µA.
V
BAT
4V
3V
2V
1.5 V
1V
0V
CONSTANT
CURRENT
CONSTANT
VOLTAGE
V
PROG
V
PROG
(V)
CHARGING
BEGINS
CHARGING
COMPLETE
Figure 2. PROG Pin Indicates Charge Status