参数资料
型号: SC804
厂商: Semtech Corporation
英文描述: Fully Integrated Lithium-Ion Battery Charger System with Timer
中文描述: 完全集成的锂离子电池充电器系统的计时器
文件页数: 7/21页
文件大小: 548K
代理商: SC804
15
2007 Semtech Corp.
www.semtech.com
SC804
PRELIMINARY
POWER MANAGEMENT
State Diagram
Soft Start CC Mode
Yes
IOUT =IFAST
Yes
IOUT <ITERM
VOUT <VCV -VReQ
low temp> NTC Temp> high temp
Yes
Start Timer
Start CV Mode
Timer
Enabled?
CC = Constant Current
CV = Constant Voltage
Yes
OVP > VCC > UVLO
En = Hi
Soft Start Vout
CHRGB Low
Timer
Enabled?
Start Pre-Charge
IOUT =IPREQ
Time >TMAX/4
Pre- Charge
Timeout Fault
FLTB goes low.
Cleared by
VBAT > VTPreQ
or Re- cycle VCC
Yes
VOUT =VCV
CHRGB High Z
Monitor Mode
VOUT off
Time >TMAX
Float Charge Mode
VOUT =VCV
NTC out of Range Fault
FLTB goes active low
Timer is frozen
Charge resumes when NTC
Temperature is valid
VOUT > VTPreQ
Shutdown Mode:
VOUT &IOUT off,
CHRGB High Z,
CPB Low.
Over-Voltage, Under-Voltage or
Over-Temperature will force the
SC804 into Shutdown Mode
from any state.
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