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SC802AEVB датащи(PDF) 14 Page - Semtech Corporation

номер детали SC802AEVB
подробное описание детали  Fully Integrated Lithium-Ion Battery Charger System with Timer
PDF  18 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC802AEVB датащи(HTML) 14 Page - Semtech Corporation

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© 2008 Semtech Corporation
SC802/SC802A
14
State Diagram
Shutdown Mode
VOUT off
CHRGB High Z
CPB Low
Soft Start CC Mode
Start Pre-Charge
Yes
IVOUT = IFQ
IVOUT = IFQ
Monitor Mode
VOUT is off
Float Charge Mode
VVOUT = VCV
Soft Start
Yes
Charger
Enabled?
BIPB = Low?
Start Timer
VVOUT > VTPreQ ?
t > TPreQF = TQCOMP / 4 ?
IVOUT < ITERM ?
VVOUT = VCV ?
Start CV
Regulation
CHRGB Low
CHRGB High Z
VVOUT < VCV - VTReQ ?
Pre-Charge
Timeout Fault
CHRGB blinks at 0.5Hz
Cleared by
VVOUT > 2.8V or
Re-cycle EN or VCC
NTC Temperature Fault
CHRGB blinks at 0.5Hz
Timer is frozen
Charge resumes when NTC
Temperature is valid
VEN_NTC < RTNTC_HF × VVCC or
VEN_NTC > RTNTC_CR × VVCC
Yes
Yes
Yes
Yes
Yes
Yes
Start LDO Mode
IVOUT < ITERM ?
CHRGB High Z
Float Charge Mode
t > TQCOMP ?
Timer
Enabled?
t > TQCOMP ?
VVOUT < VCV - VTReQ ?
Yes
Yes
VTUVLO < VVCC < VTOVP
Over Voltage or Under Voltage will
disable (and reset) the SC802/A,
regardless of charger state. Over
Temperature will turn off output
but preserve charger state.
Yes
Yes
VVOUT = VCV
Yes
CC = Constant Current
CV = Constant Voltage
Timer
Enabled?



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