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PDF SC806 Data sheet ( Hoja de datos )
| Número de pieza | SC806 | |
| Descripción | Miniature High Current Lithium-Ion Battery Charger | |
| Fabricantes | Semtech | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SC806 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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POWER MANAGEMENT
Description
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.
Typical Application Circuit
SC806
Miniature High Current
Lithium-Ion Bwawtwt.DeartaySheCeth4Ua.cormger
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
0.1µA 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
*Patent Pending
Applications
Cellular phones
PDAs
Handheld meters
Charging stations
USB chargers
Digital cameras
GPS Handhelds
Programmable current source
CHARGER VIN
C1
.1uF
SC806 Typical Application Circuit
D2
LED
R2
1k
Charging
Indicator
SC806
D1
3
10
2
8
7
VCC
VOUT
CHRGB NTC
CPB
ITERM
NOBAT IPRGM
DIS GND
1
9
5
4
6
LED
R1
1k Adapter
Present
Indicator
NOBAT Indicator
R4
3.01k
R3
3.01k
NTC Voltage
BATTERY
C2
2.2uF
August 10, 2005
1 www.semtech.com
1 page  
POWER MANAGEMENT
Block Diagram
SC806
www.DataSheet4U.com
VCC
3
GND
6
CPB
2
NOBAT
8
Reference
Voltages
Vout Ref
Fast Charge Ref
Pre-Charge Ref
Control
Pre-Charge On
Fast-Charge On
Over Temp
Under Voltage
Over Voltage
DIS
7
NTC
9
CHRGB
10
NTC
Interface
VOUT
Vout Ref
Fast Charge Ref
Pre-Charge Ref
VOUT
1
IPRGM
4
ITERM
5
SC806 6V Charger Block Diagram
2004 Semtech Corp.
5
www.semtech.com
5 Page 
POWER MANAGEMENT
SC806 State Diagram
SC806
www.DataSheet4U.com
Under Voltage will force the
SC806 into Shutdown Mode
from any state.
OVP> Vin > UVLO
CPB=Low
Shutdown Mode
Vout/Iout off
CHRGB High Z
Dis=Hi
Yes
CHRGB Low
CC=Constant Current
CV=Constant Voltage
Start Pre-Charge
Soft Start CC Mode
Iout=1500/Rprog
Yes
Vout>2.8V
Iout=150/Rterm
Vout=CV
Yes
Start CV Mode
Iout<Iterm
Yes
CHRGB High Z
Monitor Mode
Vout=off
Vout< CV-100mV
OV or OT forces the
output off and
CHRGB blinks at 1Hz
Charge resumes when the
Fault is removed
2004 Semtech Corp.
11
www.semtech.com
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet SC806.PDF ] | |
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