DW8502 High Power LED Driver General Description：
The DW8502 is an instant On/Off LED driver for high power LED applications. At DW8502 output stage, one regulated current port is designed to provide a uniform and constant current sink for driving LEDs within a large range of VF variations. DW8502 easily provides users a consistent current source. User may adjust the output current from up to 2.5A through an external resistor ,RS, which gives users flexibility in controlling the light intensity of LEDs. In addition, users can precisely adjust LED brightness from 0% to 100% via output en-able (EN) with Pulse Width Modulation. DW8502 also guarantees that LEDs can be cascaded to maximum 40V at the output port.
DW8502 Applications :
● LED light bulbs
● Signage and decorative LED lighting
● General lighting of flat panel displays
● RGB backlighting LED driver
● Current stabilizer with DC/DC or AC/DC
● General purpose constant current source
DW8502 Features：
● Constant output current invariant to supply and load voltage change
● 5V to 40V supply voltage
● Up to2.5A adjustable regulated output current
● Built-in thermal derating circuit
● Available PWM dimming control
● Output current adjusted through an external resistor
● TO263-5L(10.1mm0x14.85mmx4.57mm)，TO220-5L(10.10mmx28.85mmx4.57mm) Package
● PIN to PIN A711
DW8502 Pin placement and IC dimension ：
DW8502 Pin Description
No.
| Pin Name | Description |
1
| VDD
| Supply Voltage input
|
| 2 | RS
| Output current set input. Connect a resistor from RS to GND to set the LED bias current |
| 3 | GND
| Ground |
| 4 | EN
| Output stage enable control pin. High enable the OUT pin. Dimming control is possible by PWM(Pulse width modulation). Typically, It operates under 30KHz. |
| 5 | OUT
| Output pin. Sink current is decided by the current on RSET connected to RS |
| 6 | HS
| Heat sink, normally connected GND
|
DW8502 Block Diagram
DW8501 Typical Operating Characteristics
DONGWOON- large current linear constant current drive IC- multiple DW8502 parallel drive：
DONGWOON Linear constant current solution recommend：
| DW8501
| DW8502
| DW8505A
| DW8506
| DW8506A
| DW3505A
|
Vin (min/max(V)) | 5V to 40V
| 5V to 40V
| 5V to 40V
| 6.5V to 40V
| 6.5V to 40V
| 5V to 40V
|
Output Current(mA) | Up to 1.5A adjustable
| Up to 2.5A adjustable
| Up to 100mA adjustable
| Up to 100mA adjustable
| Fixed 60mA
| Up to 300mA adjustable
|
Dropout Voltage
| Max.0.3V @ ILED=300mA
| Max. 1V @ ILED=1A
| Max. 0.1V @ ILED=60mA
| Max. 0.5V @ ILED=50mA
| Max. 0.6V @ ILED=60mA
| Max. 0.2V @ ILED=60mA
|
Dimming
| PWM
| PWM
| PWM
| -- | -- | PWM
|
Protection Function | Thermal derating
| Thermal derating
| Thermal derating
| Thermal derating
| Thermal derating
| Thermal derating
|
Package Options | SOT223-5L (6.5 x 3.5 x 1.8) TO252-5L (6.5 x 5.5 x 2.3) | TO263-5L (10.16x15.35x4.57) TO220-5L (10.1x28.85x4.57) | SOT23-5L (2.9 x 2.8 x 1.45) | SOT23-5L (2.92 x 2.8 x 1.3) | WLCSP (0.94 X 0.85 X 0.45) | SOT-89-5L (4.5 x 2.45 x 1.5) |
Typical application circuit | 
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