UCC28633D datasheet(8/79 Pages) TI

Part #	UCC28633D

Description	High-Power Flyback Controller with Primary-Side Regulation and Peak-Power Mode

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Manufacturer	TI [Texas Instruments]

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UCC28630

UCC28631

UCC28632, UCC28633

SLUSBW3C – MARCH 2014 – REVISED MARCH 2015

www.ti.com

Electrical Characteristics (continued)

over operating junction temperature range (unless otherwise noted) and VDD = 12 V

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VSENSE Pin (MAGNETIC SENSE)

Required positive voltage at

Internal output voltage sense

VOUT(ref)

VSENSE pin during off-time (at

7.425

7.500

7.575

V

reference level

25°C)

tOUT(smp)

Vsense sample delay for VOUT

Measured w.r.t. DRV falling edge

1.7

µs

Internal output voltage sense OVP

Measured w.r.t. regulation level,

VOUT(ovp)

120%

level

tracking

CURRENT SENSE (CS) Pin

VCS(max)

Peak CS pin voltage level

At maximum modulator demand

800

mV

VCS(min)

Peak CS pin voltage level

At minimum modulator demand

172

mV

VSLOPE

Slope compensation ramp

30

mV/µs

OVER TEMPERATURE PROTECTION

Thermal protection shutdown

Default internal setting, latch-off

TEMPTRIP

125

°C

temperature

protection

TEMPHYST Thermal protection hysteresis

10

°C

GATE DRIVE OUTPUT (DRV)

ROH

High level source resistance

IOH = 100 mA

22

35

Ω

ROL

Low level sink resistance

IOL = –100 mA

1.2

2.5

Ω

8

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