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CL8800

Microchip
Part Number CL8800
Manufacturer Microchip
Description Sequential Linear LED Driver
Published Sep 22, 2016
Detailed Description CL8800 Sequential Linear LED Driver Features • Minimal component count (base config: CL8800 + 6 resistors + diode bridg...
Datasheet PDF File CL8800 PDF File

CL8800
CL8800

Overview
CL8800 Sequential Linear LED Driver Features • Minimal component count (base config: CL8800 + 6 resistors + diode bridge) • No magnetics, no capacitors • Up to 7.
5W output (13W w/ heat sink) • >110Lm/W using efficient LEDs • 85% typical electrical efficiency • >0.
95 power factor • <20% THD line current • Low conducted EMI w/o filters • 85% LED luminous utilization • Phase dimmer compatible with an RC network Applications • Fluorescent tube retrofit • Incandescent & CFL bulb replacement • General LED lighting Description CL8800 is designed to drive a long string of inexpensive, low-current LEDs directly from the AC mains.
A basic driver circuit consists of CL8800, six resistors, and a bridge rectifier.
Two to four additional components are optional for various levels of transient protection.
No capacitors, EMI filters, or power factor correction circuits are needed.
A string of series/parallel LEDs is tapped at six locations.
Six linear current regulators sink current at each tap and are sequentially turned on and off.
Thereby tracking the input sine wave voltage.
Voltage across each regulator is minimized when conducting, providing high efficiency.
Output current at each tap is individually resistor-adjustable.
Cross-regulation, as the CL8800 switches from one regulator to another, provides smooth transitions.
The current waveform can be tailored to optimize for input voltage range, line/load regulation, output power/current, efficiency, power factor, THD, dimmer compatibility, and LED utilization.
With the addition of an RC network, the driver is compatible with phase dimming.
 2015 Microchip Technology Inc.
DS20005357A-page 1 CL8800 Package Type 33 GND 1 GND GND GND GND GND GND GND GND BIAS TAP1 TAP2 TAP3 TAP4 TAP5 TAP6 GND GND GND GND GND GND GND GND SET1 NC SET2 NC SET3 NC SET4 NC SET5 SET6 See Table 2-1 for pin information Typical Application Circuit AC Mains Transient Protection 100 - 120VAC additional components for 230VAC TAP1 BIAS GND SET1 ...


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