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| 型号： | SC804AMLTRT |
| 厂商： | Semtech Corporation |
| 英文描述： | Fully Integrated 4.4V Lithium-Ion Battery Charger System with Timer |
| 中文描述： | 完全集成的4.4V锂离子电池充电器系统的计时器 |
| 文件页数： | 1/21页 |
| 文件大小： | 550K |
| 代理商： | SC804AMLTRT |
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www.semtech.com
SC804A
Fully Integrated 4.4V Lithium-Ion
Battery Charger System with Timer
PRELIMINARY
POWER MANAGEMENT
July 18, 2007
Typical Application Circuit
Applications
Description
Features
The SC804A is a fully integrated full-feature, single cell
constant-current/constant-voltage (CC/CV) 4.4V Lithium-
Ion battery charger.
With an integrated timer and
complete charge control algorithm, the SC804A is ideal for
stand-alone charger applications. The SC804A contains
programmable pre-charge, fast-charge and termination
current settings. The SC804A can be programmed to
terminate charging based on the output current or the
time-out of the programmable timer. The fast charge
current is typically set with an external resistor, but it can
also be adjusted by applying an analog voltage to the AFC
pin. This feature allows use of a microcontroller to set
charging current via a DAC output.
The SC804A’s 14V input voltage range eliminates the
need for additional protection circuitry required by other
5V chargers to protect against faulty adapters.
The
SC804A also incorporates an under-voltage lockout falling
threshold of 3V so that charging will continue if the input
supply goes into a current-limited mode.
Reference ground and battery sense inputs are provided
to eliminate voltage drops during charging due to high
charging currents.
The output voltage to the battery is controlled to within
1% of the programmed voltage. The SC804A can also
function as a general purpose current source or as a
current source for charging nickel-cadmium (NiCd) and
nickel-metal-hydride (NiMH) batteries.
Typical Application Circuit
Fully integrated charger with FET pass transistor,
reverse-blocking diode, sense resistor, timer, and
thermal protection
Battery voltage controlled to 1% accuracy
Programmable precharge, fastcharge & termination
current over wide range, with analog current control
reference input for design exibility
Up to 1.5A continuous charge current
Input voltage range from 3V to 14V
Soft-start reduces start-of-charge adapter
load transients
NTC thermistor sense input and adjustable cold
temperature threshold
Adjustable 2 - 6 hour programmable charge timer
0.1μA battery drain current in shutdown and monitor
modes
Small 4mm x 4mm 16 lead MLPQ package
Over-current protection in all modes
Over-voltage protection
Remote Kelvin sensing at the battery terminals
Status indicators for charger-present, charger-active,
over-voltage fault, and error notication
Cellular phones
PDAs
Handheld meters
Charging stations
Handheld computers
Digital cameras
Programmable current
source
VCC
14
OVPB
13
3
IPRGM
7
NTC
CPB
CHRGB
RTIM
CTO
11
10
12
2
ITERM
4
FLTB
8
6
GND
5
RGND
BSEN
VOUT
AFC
1
16
15
9
SC804A
C1
2.2
μF
R3
Battery
Red
Green
Charger VIN
RT
NTC
R1
R2
DAC ISET
C2
2.2
μF
R4
R5
R6
ERROR
OV_FLT
相关PDF资料 |
PDF描述 |
|---|---|
| SC804A | Fully Integrated 4.4V Lithium-Ion Battery Charger System with Timer |
| SC804EVB | Fully Integrated Lithium-Ion Battery Charger System with Timer |
| SC804IMLTRT | Fully Integrated Lithium-Ion Battery Charger System with Timer |
| SC804 | Fully Integrated Lithium-Ion Battery Charger System with Timer |
| SC805EVB | Miniature Integrated High Current Lithium-Ion Battery Charger |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SC804EVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Fully Integrated 4.4V Lithium-Ion Battery Charger System with Timer |
| SC804IML.TRT | 功能描述:IC LI-ION BATTERY CHRGR 16MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:1 系列:- 功能:充电管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:3.75 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:剪切带 (CT) 产品目录页面:669 (CN2011-ZH PDF) 其它名称:MCP73831T-2ACI/OTCT |
| SC804IMLTRT | 制造商:Semtech Corporation 功能描述:Battery Charger Li-Ion 1500mA 4.2V 16-Pin MLPQ EP T/R |
| SC805 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Miniature Integrated High Current Lithium-Ion Battery Charger |
| SC805A | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Miniature Integrated High Current Lithium-Ion Battery Charger |
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