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SC802 Datasheet(PDF) 11 Page - Semtech Corporation |
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SC802 Datasheet(HTML) 11 Page - Semtech Corporation |
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11 / 16 page  11 © 2005 Semtech Corp. www.semtech.com SC802/SC802A POWER MANAGEMENT PRELIMINARY State Diagram Shutdown Mode Vout/Iout off CHRGB High Z CPB Low Soft Start CC Mode Start Pre-Charge Yes OVP> Vin > UVLO Iout=1500/Rprog SC802:Iout=246/Rterm SC802A:Iout=145/Rterm Over Voltage, Under Voltage, or Over Temperature will force the SC802 into Shutdown Mode from any state. Monitor Mode Vout=off Float Charge Mode Vout = CV Yes Soft Start Vout Yes En=Hi BIPB=Low Timer Enabled? Start Timer Vout>2.8V Time>Tmax/4 Iout<Iterm Vout=CV Start CV Mode CHRGB Low CHRGB High Z Vout< CV-100mV Pre-Charge Timeout Fault CHRGB blinks at 0.5Hz Cleared by Vbat>2.8V or Re-cycle EN or VCC NTC out of Range Fault CHRGB blinks at 0.5Hz Timer is frozen Charge resumes when NTC Temperature is valid 0C > NTC Temp >50C CC=Constant Current CV=Constant Voltage Yes Yes Yes Yes Yes Yes Yes Start LDO Mode Iout<Iterm CHRGB High Z Float Charge Mode Vout = CV Time>Tmax Timer Enabled? Time>Tmax Vout< CV-100mV Yes Yes Yes Shutdown Mode Vout/Iout off CHRGB High Z CPB Low Soft Start CC Mode Start Pre-Charge Yes OVP> Vin > UVLO Iout=1500/Rprog SC802:Iout=246/Rterm SC802A:Iout=145/Rterm Over Voltage, Under Voltage, or Over Temperature will force the SC802 into Shutdown Mode from any state. Monitor Mode Vout=off Float Charge Mode Vout = CV Yes Soft Start Vout Yes En=Hi BIPB=Low Timer Enabled? Start Timer Vout>2.8V Time>Tmax/4 Iout<Iterm Vout=CV Start CV Mode CHRGB Low CHRGB High Z Vout< CV-100mV Pre-Charge Timeout Fault CHRGB blinks at 0.5Hz Cleared by Vbat>2.8V or Re-cycle EN or VCC NTC out of Range Fault CHRGB blinks at 0.5Hz Timer is frozen Charge resumes when NTC Temperature is valid 0C > NTC Temp >50C CC=Constant Current CV=Constant Voltage Yes Yes Yes Yes Yes Yes Yes Start LDO Mode Iout<Iterm CHRGB High Z Float Charge Mode Vout = CV Time>Tmax Timer Enabled? Time>Tmax Vout< CV-100mV Yes Yes Yes |
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