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CL8801

Supertex
Part Number CL8801
Manufacturer Supertex
Description Sequential Linear LED Driver
Published Apr 10, 2012
Detailed Description Supertex inc. CL8801 Sequential Linear LED Driver Features ►► Minimal component count (base config: CL8801 + 4 resi...
Datasheet PDF File CL8801 PDF File

CL8801
CL8801

Overview
Supertex inc.
CL8801 Sequential Linear LED Driver Features ►► Minimal component count (base config: CL8801 + 4 resistors + diode bridge) ►► No magnetics, no capacitors ►► Up to 7.
5W output (13W w/ heat sink) ►► >110Lm/W using efficient LEDs ►► 85% electrical efficiency ►► >0.
95 power factor ►► <30% 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 General Description The CL8801 is designed to drive a long string of inexpensive, low current LEDs directly from the AC mains.
A basic driver circuit consists of the CL8801, four 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 four locations.
Four linear current regulators sink current at each tap and are sequentially turned on and off, 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.
Crossregulation, as the CL8801 switches from one regulator to the next, 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.
Typical Application Circuit transient protection AC Mains TAP1 BIAS GND SET1 TAP2 TAP3 CL8801 SET2 SET3 TAP4 SET4 Doc.
# DSFP-CL8801 D031914 Supertex inc.
www.
supertex.
com CL8801 Ordering Information Part Number Package Options CL8801K63-G 33-Lead (6x6) QFN CL8801K63-G M935 33-Lead (6x6) QFN -G denotes a lead (Pb)-free / RoHS compliant pack...


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