Features

Preliminary Data Sheet No. PD60169-D

DIMMING BALLAST CONTROL IC

Typical Connection

Description

Description: The IR2159/IR21591 are complete dimming ballast controllers and 600V

half-bridge drivers all in one IC. The architecture includes phase control for trans-

former-less lamp power sensing and regulation which minimizes changes needed to

adapt non-dimming ballasts for dimming. Externally programmable features such as

preheat time and current, ignition-to-dim time, and a complete dimming interface with

minimum and maximum settings provide a high degree of flexibility for the ballast

design engineer. Protection from failure of a lamp to strike, filament failures, thermal

overload, or lamp failure during normal operation, as well as an automatic restart

function, have been included in the design. The heart of this control IC is a voltage-

controlled oscillator with externally programmable minimum frequency. The IR2159/

IR21591 are available in both 16 pin DIP and 16 pin narrow body SOIC packages.

16

15

14

13

4

3

2

1

5

6

7

11

10

8

9

12

VDC

VCO

IPH

FMIN

MIN

MAX

DIM

CPH

CS

LO

COM

VCC

VB

VS

HO

SD

+ DC Bus

+ Rectified AC Line

- DC Bus

R

MIN

C

PH

C

VCO

R

CS

R

MAX

R

FMIN

R

IPH

0.5 to 5VDC

R

DIM

C

VDC

R

VDC

R

VAC

R

PULL-UP

Single Lamp Dimmable

Packages

16 Lead PDIP

16 Lead SOIC

(narrow body)

Parameter

IR2159

IR21591

Deadtime

1.8us

1.0us

Frequency

Range

See

Graph 3

See

Graph 4

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