IRS29831 查看數據表（PDF） - International Rectifier

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IRS29831

LED FLYBACK CONTROL IC

International Rectifier 

IRS29831PBF

Description

The IRS29831 is an integrated LED driver control IC and power MOSFET designed to drive Flyback and Buck-

Boost converter based LED drivers. The IRS29831 includes primary side power regulation allowing a low cost

isolated or non-isolated LED driver to be implemented without the need for an opto-isolator for a fixed LED load.

The IRS29831 is also compatible with converters that include secondary feedback circuitry. Other features of the

IRS29831 include a high voltage startup enabling VCC supply to be derived initially from the high voltage DC bus

until the auxiliary Flyback inductor winding takes over for rapid startup. The IRS29831 typically operates in critical

conduction (CrCM) with full protection against open and short circuit as well as inductor saturation. The IRS29831

may be used in single stage LED drivers with no DC bus smoothing capacitor enabling high power factor and low

THD with minimal component count.

Typical Connection Diagram (non-dimming)

CSNUB RSNUB

DFB

RIN

DVCC

DSNUB

T1

AC

Line

Input

BR1

CDC

CIN

CCOMP

COMP

1

ZX

2

CS

3

COM

4

RDC

RCS

IC1

VDC

8

HV

7

VCC

6

DRN

5

DZVCC

RZX1

RVCC

CVCC

RZX2

CVOUT

ROUT

3 www.irf.com © 2014 International Rectifier

September 10, 2014

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