High Power LED Driver DW8501 for GENERAL DESCRIPTION：
The DW8501 is an instant On/Off LED driver for high power LED applications. At DW8501 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. DW8501 easily provides users a consistent current source. User may adjust the output current from up to 1.5A 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. DW8501 also guarantees that LEDs can be cascaded to maximum 40V at the output port.
DW8501 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
DW8501 Features：
● Constant output current invariant to supply and load voltage change
● 5V to 40V supply voltage
● Up to1.5A adjustable regulated output current
● Built-in thermal derating circuit
● Available PWM dimming control
● Output current adjusted through an external resistor
● TO-252, SOT-223 Package
DW8501 Pin placement and IC dimension ：
DW8501 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
|
DW8501 Block Diagram
DW8501 Typical Operating Characteristics
DONGWOON-DW8501 Driver IC analog dimming typical application circuit
DONGWOON-DC-DC linear constant current IC-DW8501 advantages:
●If the output voltage of the AC/DC switch is similar to that of the LED total Vf voltage, the linear constant current IC efficiency can be as high as 95%.
●Super-stable, non-stroboscopic LED linear constant current drive IC scheme DW8501, circuit components are very few and low cost, circuit wiring is simple;
●There is only one wiring for each lamp bar and driving board. The wiring arrangement is few and easy to assemble. It can be directly welded and pasted on the LED lamp board to achieve the integration of power lamp board, easy to assemble and produce, and reduce the production cost.
●DW85010 VDD withstands 41V voltage, 23V output voltage, and is encapsulated in TO252-5L (the power consumption of differential * drive current is controlled within 1.5W, the differential voltage near may be small power consumption, higher reliability);
●DW8501 EN pin can be used for various turn-off protection measures, and Iset pin can be used for various temperature or optical coupling components, with switching components to adjust the current changes, PWM dimming without stroboscopic.
DONGWOON-DC-DC Linear Constant Current IC-DW8501 is suitable for LED advertising lamp box products for constant brightness and dimming applications. LED desk lamp, LED car lamp, LED car lamp driving, LED lamp bar, LED light module, LED flat lamp, LED stage lamp and LED wall washing lamp can also be used for TV backlight driving.
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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