SIP11206 datasheet(2/19 Pages) VISHAY

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Document Number: 69232

S-81795-Rev. C, 04-Aug-08

Vishay Siliconix

SiP11206

TECHNICAL DESCRIPTION

SiP11206 is a switching controller on the primary side of a

half-bridge intermediate bus converter. With 100 V depletion

mode MOSFET in the chip, the SiP11206 is capable of being

powered directly from the high voltage bus to VCC through an

external PNP pass transistor, or may be powered by an

external supply directly to the VCC pin.

Without the use of an external pass transistor, failure of the

converter output to power VCC above the VREG level will

result in over temperature protection activating hiccup

operation whenever the pre-regulator power dissipation

becomes excessive. The external high- and low-side

N-Channel power MOSFETs are driven by a built in driver

with ± 1.6 A peak current capability.

SiP11206 is available in the MLP44-16 PowerPAK® package

and TSSOP-16 PowerPAK® package and is specified over

the ambient temperature range of - 40 °C to + 85 °C

SIP11206 BLOCK DIAGRAM

Level

Shift

Pre Reg

Driver

Control

OSC

PWM Comp

Hi-side driver

Low-side driver

OTP

VIN

VCC

ROSC

VREF

PGND

Ramp

BST

UVLO

Over Current protection

AGND

VINDET

VCC

0.13 V

COSC

DSS

ISS

0.85 V

4.8 V

VREF

ISS

250 mV

IDSS

IBIAS

DMAX

COMP

RDB

VREF

IBIAS

VSD

0.200 V

VUV

SS Comp

VREG

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