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參數資料
| 型號： | SC804A |
| 廠商： | 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鋰離子電池充電器系統的計時器 |
| 文件頁數： | 1/21頁 |
| 文件大小： | 550K |
| 代理商： | SC804A |
1
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
相關PDF資料 |
PDF描述 |
|---|---|
| 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 |
| SC805IMLTRT | Miniature Integrated High Current Lithium-Ion Battery Charger |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SC804AMLTRT | 功能描述:IC LI-ION BATT CHARGER 16-MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:1 系列:- 功能:充電管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應商設備封裝:SOT-23-5 包裝:剪切帶 (CT) 產品目錄頁面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
| SC804EVB | 制造商:SEMTECH 制造商全稱: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 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:1 系列:- 功能:充電管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應商設備封裝:SOT-23-5 包裝:剪切帶 (CT) 產品目錄頁面:669 (CN2011-ZH PDF) 其它名稱: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 制造商全稱:Semtech Corporation 功能描述:Miniature Integrated High Current Lithium-Ion Battery Charger |
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