CRD1600 Cirrus Logic Inc, CRD1600 Datasheet - Page 3

• Manufacturer Part Number: CRD1600
• Description: High-efficiency PFC + Fluorescent Lamp Driver Reference Design
• Manufacturer: Cirrus Logic Inc

Specifications of CRD1600

• Silicon Manufacturer: Cirrus Logic
• Application Sub Type: Power Factor Correction (PFC)
• Kit Application Type: Power Management
• Silicon Core Number: CS1600
• Utilized Ic / Part: CS1600
• Main Purpose: Lighting, Ballast Control
• Secondary Attributes: Power Factor Corrected (PFC)
• Embedded: No
• Primary Attributes: Input 108 ~ 305 VAC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

CRD1600-120W
1. INTRODUCTION
The CS1600 is a high-performance Variable Frequency Discontinuous Conduction Mode (VF-DCM), ac-
tive Power Factor Correction (PFC) controller, optimized to deliver the lowest PFC system cost for elec-
tronic ballast applications
The CS1600 uses a digital control algorithm that is optimized for high efficiency
.
and near unity power factor over a wide input voltage range (108-305 VAC).
The CS1600 uses an adaptive digital control algorithm. Both the ON time and the switching frequency are
varied on a cycle-by-cycle basis over the entire AC line to achieve close to unity power factor. The varia-
tion in switching frequency also provides a spread frequency spectrum, thus minimizing the conducted
EMI filtering requirements.
The feedback loop is closed through an integrated digital control system within the IC. Protection features
such as overvoltage, overcurrent, overpower, open circuit, overtemperature, and brownout help protect
the device during abnormal transient conditions. Details of these features are provided in the CS1600 data
sheet.
The CRD1600-120W board demonstrates the performance of the CS1600 over a wide input voltage
range. This board has been designed to generate 460V from the PFC stage, which is then processed by
the resonant driver, to power up to two T5 lamps connected in series, for a total output of 108W.
Extreme caution needs to be exercised while handling this board. This board should be energized by
trained professionals only.
Terminal block J1 is used to connect the AC line. The lamp is connected to terminal J2 as shown in the
schematic.
J1
J2
AC Line
Output
Input
Terminals
Figure 1. Board Connections
WARNING
High Voltage Hazard
ONLY QUALIFIED PERSONNEL SHOULD HANDLE THE CRD1600-120W.
CAUTION:
Heatsinking is required for Q1.
The end product should use tar pitch or an equivalent compound for this purpose.
For lab evaluation purposes, a fan is recommended to provide adequate cooling.
DS904RD4
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