Advance Product Information

This document contains information for a product under development.

Cirrus Logic reserves the right to modify this product without notice.

Copyright

 Cirrus Logic, Inc. 2010

(All Rights Reserved)

Cirrus Logic, Inc.

http://www.cirrus.com

CS1600

Low-cost PFC Controller for Electronic Ballasts

Description

CS1600 is a high-performance Variable Frequency Discontinu-

ous Conduction Mode (VF - DCM), active Power Factor

Correction (PFC) controller, optimized to deliver the lowest PFC

system cost for electronic ballast applications.

A variable ON time / variable frequency algorithm is used to

achieve near unity power factor. This algorithm spreads the EMI

frequency spectrum, which reduces the conducted EMI filtering

requirements. The feedback loop is closed through an integrated

compensation network within the IC, eliminating the need for

additional external components. Protection features such as

overvoltage, overcurrent, overpower, open- and short-circuit pro-

tection, overtemperature, and brownout help protect the device

during abnormal transient conditions.

Pin Assignments

8-lead SOIC

NC

STBY

IAC

FB

NC

VDD

GD

GND

1

2

3

4

8

7

6

5

D6

C1

D5

C2

BR1

BR1

BR1

BR1

AC

Mains

+12V

L1

Q1

R3

CS1600

IAC

NC

FB

STBY

VDD

GND

NC

GD

2

3

1

7

8

6

4

5

R1a

R1b

R2b

R2a

C3a

C3b

R2c

R1c

MAY ‘10

DS904A5