TB62771FTG datasheet(15/29 Pages) TOSHIBA

Part #	TB62771FTG

Description	Step-up DC/DC controller built in 4-channel sink driver for white LED

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Manufacturer	TOSHIBA [Toshiba Semiconductor]

Direct Link	http://www.semicon.toshiba.co.jp/eng

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15 / 29 page

TB62771FTG

2013-05-23

15

3) Example3 (DIM signal is inputted after soft-start)

EN

VIN

DIM

VCC

VLED

IOUT1

IOUT2

IOUT3

IOUT4

NDRV

FLT

Start function

･UVLO(VIN)

･UVLO(VCC)

･OVP

･TSD

･VCC

4V

1ms

Unused channel

detection

VLED reachs “OVP detection level×0.95"

→Soft-start finishs

DIM outputs “H” for 5clks or more.

→Feedback object change to minimum OUT terminal.

Natural discharge

Soft-start

（Feedback object:

OVP×0.95）

Phase shift function

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TB62771FTG Datasheet(PDF) 15 Page - Toshiba Semiconductor

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