Primary-Side Regulator LED Controller With Active PFC for LED Drivers :DW8551
DONGWOON-DW8551 Order information
ORDERING PART NUMBER
| MARKING
| PACKAGE
| TRANSPORT MEDIA |
DW8551
| DW8551
xxxxxX
| SOP8
| 2500/Tape and Reel
|
PWM Dimming LED Driver -Isolated LED constant current drive-DW8551 General Description:
The DW8551 is a primary-side control offline flyback controller with active power factor correction. It is especially designed for LED lighting system. The DW8551 controls the LED current accurately without using an opto-coupler, which can significantly simplify the design of LED lighting system. Utilizing an on-chip multiplier, the DW8551 achieves high power factor over wide line and load ranges.
The multi-protection function largely enhances the safety and reliability of the system, including over voltage protection; short circuit protection, LED open protection, cycle-by-cycle current limit, VCC UVLO and over-temperature protection.
PWM Dimming LED Driver -Isolated LED constant current drive-DW8551 Features:
●Real current control without secondary feedback circuit；
●High current accuracy of line regulation（±2.5%）；
●Active power factor correction（PF>0.9)；
●Low harmonic content(<10%)
●DW8551 External PWM dimming(5%~100%)
●High efficiency over wide operating range
●Cycle by cycle current limit
●Input over-voltage protection
●LED short protection
●LED open protection
●Over-temperature protection
●8-Pin SOP package
PWM Dimming LED Driver -Isolated LED constant current drive-DW8551 Applications:
●Isolated type LED driver applications
●PAR30、PAR38 Bulb light
●General lighting of flat panel displays
●RGB backlight
●General purpose constant current source
●In/Outdoor Lighting, Street, Roadway, Parking, Construction Lamp
PWM Dimming LED Driver -Isolated LED constant current drive-DW8551 Pin Information
PIN No.(DW8551)
| DW8551Pin Name | DW8551 Description |
1
| DPWM
| Apply a PWM signal on this pin for external PWM dimming.
|
| 2 | FB
| Voltage Loop Feedback Pin. VFB is used to detect open LED conditions by sampling the third winding voltage. |
| 3 | REC
| Rectified Voltage Sense Pin. The pin is used for sensing the AC line voltage to perform power factor correction. |
| 4 | COMP
| Compensation Pin for Internal Error Amplifier. Connect a capacitor between the pin and GND to compensate the internal feedback loop. |
| 5 | SNP
| Primary current sense Pin. The pin is used for cycle-by-cycle peak current control and limit. |
6
| GATE
| Gate Driver for the External Main MOSFET Switch.
|
| 7 | GND
| Power Ground.
|
| 8 | VCC
| Power Supply Pin. This pin supplies current to the internal start-up circuit. This pin must be bypassed with a capacitor nearby. |
PWM Dimming LED Driver -Isolated LED constant current drive-DW8551 Block Diagram:
PWM Dimming LED Driver -Isolated LED constant current drive-DW8551 Typical Application Circuit:
Key words of this article：PWM Dimming LED Driver,DW8551,DONGWOON,PWM dimmer,PWM dimming power driver IC
