RDK-193 Power Integrations, RDK-193 Datasheet - Page 5

• Manufacturer Part Number: RDK-193
• Description: KIT REF DESIGN FOR LNK403EG
• Manufacturer: Power Integrations
• Type: Power Factor Correctionr

Specifications of RDK-193

• Current - Output / Channel: 330mA
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 21V
• Features: Dimmable with Standard TRIAC Dimmer, Power Factor Correction
• Voltage - Input: 90 ~ 265VAC
• Utilized Ic / Part: LNK403EG
• Input Voltage: 90 V to 265 V
• Output Voltage: 21 V
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: LNK403EG
• Other names: 596-1307

09-Jun-10
RDR-193 7 W PAR20 LED Driver Using LNK403EG
1 Introduction
The document describes a high power-factor corrected dimmable LED driver designed to
drive 21 V at 0.33 A from an input voltage range of 90 VAC to 265 VAC. The LED driver
utilizes the LNK403EG from Power Integrations.
LinkSwitch-PH ICs allow the implementation of cost effective and low component count
LED drivers which both meet power factor and harmonics limits but also offer enhanced
end user experience. This includes ultra-wide dimming range, flicker free operation (even
with low cost with AC line TRIAC dimmers) and fast, clean turn on.
The topology used is an isolated Flyback operating in continuous conduction mode.
Output current regulation is sensed entirely from the primary side eliminating the need for
secondary side feedback components. No external current sensing is required on the
primary side either as this is performed inside the IC further reducing components and
losses. The internal controller adjusts the MOSFET duty cycle to maintain a sinusoidal
input current and therefore high power factor and low harmonic currents.
The LNK403EG also provides a sophisticated range of protection features including auto-
restart for open control loop and output short-circuit conditions. Line overvoltage provides
extended line fault and surge withstand, output overvoltage protects the supply should
the load be disconnect and accurate hysteretic thermal shutdown ensures safe average
PCB temperatures under all conditions.
In any LED luminaire the driver determines many of the performance attributes
experienced by the end customer (user) including startup time, dimming, flicker and unit
to unit consistency. For this design a focus was given to compatibility with as wider range
of dimmers and as large of a dimming range as possible, at both 115 VAC and 230 VAC.
However simplification of the design is possible for both single input voltage operation, no
dimming or operation with a limited range of (higher quality) dimmers.
This document contains the LED driver specification, schematic, PCB diagram, bill of
materials, transformer documentation and typical performance characteristics.
Power Integrations
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