SC804 datasheet(15/21 Pages) SEMTECH

Part #	SC804

Description	Fully Integrated Lithium-Ion Battery Charger System with Timer

PDF	21 Pages

Scroll/Zoom	100%

Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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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.

SC804 Datasheet(PDF) 15 Page - Semtech Corporation

SC804 Datasheet(HTML) 15 Page - Semtech Corporation

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