SIP11205DLP-T1-E3 Просмотр технического описания (PDF) - Vishay Semiconductors

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SIP11205DLP-T1-E3

Feed-Forward Controller with Primary MOSFET Drivers for Intermediate Bus Converters

Vishay Semiconductors 

SiP11205

Vishay Siliconix

TECHNICAL DESCRIPTION

SiP11205 is a feed-forward controller on the primary side of

a half-bridge intermediate bus converter. With 100 V

depletion mode MOSFET in the chip, the SiP11205 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

SIP11205 BLOCK DIAGRAM

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. SiP11205 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.

COMP

VINDET

VREF

AGND

SS

CS

VIN

VCC

Pre Reg UVLO

VREG

+ VSD

-

+ VUV

-

BG

VCC

ISS

1.2 V+V INDET /2

IDSS

+

-

0.85 VSS

-

+

250 mV

SS Comp

+

Driver

Control

-

Over Current protection

EN

0.13 V

Le

EN

VREF

EN

D MAX

EN

+

-

PWM Comp

Ramp

OSC

EN

IBIAS

VINDET /2

VREF

OTP

Level

Shift

VUV

Hi-side driver

EN

Le

Low-side driver

I DSS

I SS

I BIAS

BST

DH

LX

DL

PGND

0.200 V

ROSC RDB COSC

www.vishay.com

2

Document Number: 69233

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

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