SC805AEVB datasheet(15/17 Pages) SEMTECH

Part #	SC805AEVB

Description	Miniature Integrated High Current Lithium-Ion Battery Charger

PDF	17 Pages

Scroll/Zoom	100%

Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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15 / 17 page

 2007 Semtech Corp.

www.semtech.com

SC805A

POWER MANAGEMENT

State Diagram

Shutdown Mode

Vout/Iout off

CHRGB High Z

Soft Start CC Mode

Start Pre-Charge

OVP> Vin > UVLO

Iout=1500/Rprog

Iout =150/Rterm

Under-Voltage will force the

SC805A into Shutdown Mode

from any state.

Over-Voltage will disable

the output, suspend the

timer, and blink CHRGB.

Monitor Mode

Vout=off

Float Charge Mode

Vout = CV

Yes

Soft Start Vout

Yes

En=Hi

Timer

Enabled?

Start Timer

Vout>2.8V

Time>Tmax/4

Iout<Iterm

Vout=CV

Start CV Mode

CHRGB Low

CHRGB High

Timer

Enabled?

Time>Tmax

Vout< CV-100mV

Pre- Charge

Timeout Fault

CHRGB blinks at 1Hz

Cleared by

Vbat >2.8V or

Re - cycle EN or VCC

NTC out of Range Fault

CHRGB blinks at 1Hz

Timer is frozen

Charge resumes when NTC

Temperature is valid

0oC > NTC Temp >50oC

CC=Constant Current

CV=Constant Voltage

Yes

Time=0

Iout<Iterm

CHRGB High

Yes

Time>Tmax

Yes

SC805AEVB Datasheet(PDF) 15 Page - Semtech Corporation

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