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  Microchip Technology Semiconductor Electronic Components Datasheet  

CL8800 Datasheet

Sequential Linear LED Driver

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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 inexpen-
sive, 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 compo-
nents are optional for various levels of transient protec-
tion. No capacitors, EMI filters, or power factor
correction circuits are needed.
A string of series/parallel LEDs is tapped at six loca-
tions. 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, provid-
ing high efficiency. Output current at each tap is individ-
ually resistor-adjustable. Cross-regulation, as the
CL8800 switches from one regulator to another, pro-
vides smooth transitions. The current waveform can be
tailored to optimize for input voltage range, line/load
regulation, output power/current, efficiency, power fac-
tor, THD, dimmer compatibility, and LED utilization.
With the addition of an RC network, the driver is com-
patible with phase dimming.
2015 Microchip Technology Inc.
DS20005357A-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

CL8800 Datasheet

Sequential Linear LED Driver

No Preview Available !

CL8800
Package Type
33
GND 1
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
See Table 2-1 for pin information
Typical Application Circuit
AC
Mains
Transient Protection
100 - 120VAC additional
components
for 230VAC
TAP1
BIAS
GND
SET1
TAP2
SET2
TAP3
TAP4
CL8800
SET3
SET4
TAP5
SET5
TAP6
SET6
DS20005357A-page 2
2015 Microchip Technology Inc.


Part Number CL8800
Description Sequential Linear LED Driver
Maker Microchip
PDF Download

CL8800 Datasheet PDF






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