CS1600_1007 Datasheet, PDF (1/18 Pages) Cirrus Logic – LOW-cost PFC Controller for Electronic Ballasts

CS1600
Low-cost PFC Controller for Electronic Ballasts
Features & Description
 Lowest PFC System Cost for Electronic Ballasts
 Variable Frequency Discontinuous Conduction Mode
 Improved Efficiency Due to Variable Switching Frequency
 EMI Signature Reduction from Digital Noise Shaping
 Integrated Feedback Compensation
 Overvoltage Protection with Hysteresis
 Overpower Protection with Shutdown
 UVLO with Wide Hysteresis
 Thermal Shutdown with Hysteresis
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
NC 1
8 NC
STBY 2
7 VDD
IAC 3
6 GD
FB 4
5 GND
8-lead SOIC
D5
L1
BR1 BR1
R1a ^RAC
R1b
CS1600
AC
Mains
1
R1c
NC
C1
3
IAC
2
STBY
4
FB
+12V
7
VDD
6
R3
GD
BR1 BR1
C2 8
NC
5
GND
D6
R_FB
R2a
R2b
R2c
Q1
C3a ^Clink
C3b
Advance Product Information
This document contains information for a product under development.
Cirrus Logic reserves the right to modify this product without notice.
Cirrus Logic, Inc.
http://www.cirrus.com
Copyright  Cirrus Logic, Inc. 2010
(All Rights Reserved)
JUL ‘10
DS904A7