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参数资料
| 型号： | L6902N |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, 287 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封装： | MINI, DIP-8 |
| 文件页数： | 1/7页 |
| 文件大小： | 50K |
| 代理商： | L6902N |
1/7
L6902
January 2001
s
UP TO 1A BATTERY CHARGER
s
OPERATING INPUT VOLTAGE FROM 8V TO 36V
s
PRECISE 3.3V (
±2%) REFERENCE VOLTAGE
s
5% CHARGING CURRENT ACCURACY
s
OUTPUT VOLTAGE ADJUSTABLE FROM
1.235V TO 34V
s
250KHz INTERNALLY FIXED FREQUENCY
s
VOLTAGE FEEDFORWARD
s
ZERO LOAD CURRENT OPERATION
s
INTERNAL CURRENT LIMITING
s
PROTECTION AGAINST FEEDBACK
DISCONNECTION
s
THERMAL SHUTDOWN
APPLICATION
s
CHARGES FOR NiCd, NiMH AND LITHIUM
BATTERIES
s
SIMPLE, SMALLER & EFFICIENT STEP-
DOWN CONVERTERS
s
BATTERY EQUIPPED SYSTEMS
s
DISTRIBUTED POWER SUPPLY
s
MOBILE PC & SUBNOTEBOOK
DESCRIPTION
The L6902 is a complete and simplest IC for batteries
charging application.
Based a voltage mode structure it is a step down
switching converter integrating a current error ampli-
fier to have a constant voltage and constant current
control for a most efficient charging solution of the
modern rechargeable batteries including lithium-ion,
NiMH and NiCd.
By means of 0.1ohm on board current sense resistor
and the availability of the current sense pins (both
compatible to Vcc and for Cs- compatible with GND
too) a charging current programming is very simple
and accurate (
±5%).
The device can charge batteries in a wide range of
outputs voltage (from 1.235 to 34V) from a single cell
till to multiple cells or battery packs.
The internal robust P-Chanel DMOS transistor with a
typical of 250mohm assures high efficiency and a
minimum dropout even at high output current level.
The internal limiting current (latched function) of typ-
ical value of 2.3A protects the device from accidental
output short circuit avoiding dangerous batteries
damage.
SO8
MINIDIP
ORDERING NUMBERS:
L6902D
L6902N
1A CONSTANT CURRENT BATTERY CHARGER
TEST AND APPLICATION CIRCUIT
VIN = 8V to 36V
C1
100
F
40V
D1
1N5819
Vcc
COMP
GND
OUT
FB
VREF
1
3
2
5
6
4
8
7
R3
5.1k
L1
47
H
R1
7.5k
R2
3.3k
C2
22nF
3.3V
C4
100
F
10V
L6902
VOUT=4.2V
C3
220pF
Rsense
100mohm
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6910 | 功能描述:DC/DC 开关控制器 5.0 to 12V Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6910_05 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION |
| L6910A | 功能描述:DC/DC 开关控制器 5.0 to 12V Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6910ATR | 功能描述:DC/DC 开关控制器 5.0 to 12V Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6910G | 功能描述:电压模式 PWM 控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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