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PDF CL8800 Data sheet ( Hoja de datos )
| Número de pieza | CL8800 | |
| Descripción | Sequential Linear LED Driver | |
| Fabricantes | Microchip | |
| Logotipo |  |
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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
1 page  
CL8800
2.0 PIN DESCRIPTION
The locations of the pins are listed in Package Type.
TABLE 2-1: PIN DESCRIPTION
Pin #
Function Description
1-8
9
10
11
12
13
14
15
16
17
GND
SET1
NC
SET2
NC
SET3
NC
SET4
NC
SET5
18 SET6
19 - 20
GND
21 GND
22 - 26
GND
27 TAP6
28 TAP5
29 TAP4
30 TAP3
31 TAP2
32 TAP1
33 BIAS
Underside plate
(GND)
Circuit common (use for heat sink ground plane pass through).
Current sense for linear current regulators for each tap. Resistors on these pins
sets the tap currents.
No internal connection.
Current sense for linear current regulators for each tap. Resistors on these pins
sets the tap currents.
No internal connection.
Current sense for linear current regulators for each tap. Resistors on these pins
sets the tap currents.
No internal connection.
Current sense for linear current regulators for each tap. Resistors on these pins
sets the tap currents.
No internal connection.
Current sense for linear current regulators for each tap. Resistors on these pins
sets the tap currents.
Current sense for linear current regulators for each tap. Resistors on these pins
sets the tap currents.
Circuit common (use for heat sink ground plane pass through).
Circuit common. Connect to bridge rectifier return (use for heat sink ground plane
pass through).
Circuit common (use for heat sink ground plane pass through).
Current regulator outputs. Connect to taps along the LED string.
Provides bias for driver. Connect to rectified AC.
For heat sinking purposes, it should be soldered to a 4.0cm2 exposed copper
area. It should also be electrically connected to circuit common (GND).
2015 Microchip Technology Inc.
DS20005357A-page 5
5 Page 
APPENDIX A: REVISION HISTORY
Revision A (January 2015)
• Update file to new format
CL8800
2015 Microchip Technology Inc.
DS20005357A-page 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet CL8800.PDF ] | |
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