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
STBY
IAC
FB
1
2
3
4
8
7
6
5
NC
VDD
GD
GND
8-lead SOIC
D5
L1
R
AC
D6
R
FB
R1a
BR1
BR1
R1b
R2a
CS1600
1
NC
IAC
VDD
NC
STBY
FB
GD
GND
2
R2b
C3a C
link
R2c
4
C3b
6
5
R3
Q1
AC
Mains
C1
R1c
3
+12V
7
C2
8
BR1
BR1
Advance Product Information
Cirrus Logic, Inc.
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)
MAY ‘10
DS904A5
CIRRUS [ CIRRUS LOGIC ]
