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參數(shù)資料
| 型號(hào)： | SC806EVB |
| 廠商： | Semtech Corporation |
| 英文描述： | Miniature High Current Lithium-Ion Battery Charger |
| 中文描述： | 微型大電流鋰離子電池充電器 |
| 文件頁數(shù)： | 1/13頁 |
| 文件大?。?/td> | 405K |
| 代理商： | SC806EVB |
1
www.semtech.com
SC806
Miniature High Current
Lithium-Ion Battery Charger
POWER MANAGEMENT
Description
August 10, 2005
Features
Fully integrated charger with FET pass transistor,
reverse-blocking diode, sense resistor and thermal
protection
High Accuracy Charge Current*
Tiny 3mm x 3mm 10 lead MLP package
Programmable precharge, fastcharge and termina-
tion current
Battery voltage controlled to 1% accuracy
Battery Charge Current accurate to 5% at 800mA
Soft-start for step load and adapter plug-in
Up to 1A continuous charge current
Input voltage range from 3V to 6V allows seamless
charging from current limited adapter
0.1
μ
A battery drain current in shutdown and
monitor modes
Over current protection in all charging modes
Automatic loss of battery detection
Adapter Present, Charge Status, and No Battery
output LED drivers
Applications
Cellular phones
PDAs
Handheld meters
Charging stations
USB chargers
Digital cameras
GPS Handhelds
Programmable current source
Typical Application Circuit
*Patent Pending
The SC806 is a fully integrated, single cell, constant-cur-
rent (cc)/constant-voltage (cv) Lithium-Ion battery charger
in a tiny 3x3 mm thermally enhanced MLP package. The
SC806 can operate as a stand-alone charger or in con-
junction with a Power Management Controller (PMIC).
The SC806 has a pre-charge function for trickle charging
deeply discharged batteries. The fast charge current is
enabled automatically when the battery voltage reaches
the required threshold. When the battery reaches the
constant voltage or CV portion of the charge curve the
SC806 switches to CV regulation mode. In this mode
the output current decays until the termination current is
reached. At this point the SC806 signals the charge cycle
is complete and turns off the output and enters the moni-
tor mode. If the battery voltage drops by 100mV from
the CV voltage a new charge cycle will begin.
The SC806 can also function as a general purpose cur-
rent source or as a current source for charging Nickel-
Cadmium (NiCd) and Nickel-Metal-Hydride (NiMH) batter-
ies.
R2
1k
BATTERY
D2
LED
R3
3.01k
NOBAT Indicator
R1
1k
C2
2.2uF
Charging
Indicator
R4
3.01k
SC806 Typical Application Circuit
NTC Voltage
Adapter
Present
Indicator
C1
.1uF
D1
LED
SC806
3
7
2
8
4
6
5
10
1
9
VCC
CHRGB
DIS
CPB
NOBAT
IPRGM
GND
ITERM
VOUT
NTC
CHARGER VIN
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