DONGWOON DW8502 2.5A High-Power Linear LED Driver IC | AEC-Q100 Grade | Automotive Headlamp / Industrial Lighting | Replace A711/AMC7140
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Product Description: The DW8502 is a high-power linear LED constant-current driver IC from DONGWOON Korea, AEC-Q100 qualified for automotive applications. It supports 5–40V wide input voltage, delivers up to 2.5A adjustable constant current, integrates a high-current MOSFET and thermal foldback protection, supports 0–100% PWM dimming, requires only one external resistor for current setting, features no EMI interference, and achieves up to 98% efficiency. Designed specifically for automotive grade headlamps, high-power vehicle lighting, industrial lighting, and high-power wall washers. Direct PIN‑TO‑PIN replacement for discontinued models such as A711 and AMC7140, with superior automotive reliability and thermal performance.
DONGWOON DW8502 Ordering Information
| Ordering Code | Marking | Package | Packaging Type |
| DW8502S | DW8502 | TO263-5L | 800 pcs/reel |
| DW8502T | DW8502 | TO220-5L | 100 pcs/tube |
DW8502 Application Description
The DW8502 is a low-dropout linear step-down LED constant-current driver with PWM dimming function, developed by DONGWOON Korea. It requires only one external resistor to form a complete LED constant-current drive circuit. Adjusting this resistor sets the output current, with an adjustable range up to 2500mA. The DW8502 supports instant on/off switching, and the output can drive a wide VF range of LEDs in series. The output current can be adjusted up to 2.5A via an external RS resistor. Customers can also apply a PWM signal to the EN pin for 0%–100% precise LED brightness control. The DW8502 supports a maximum total series LED voltage of 40V, meeting the requirements of multi‑string high‑power LED applications.
The DW8502 features built-in overtemperature protection (thermal foldback): when the chip temperature becomes too high, it automatically reduces the LED output current; after the temperature returns to normal, the set current is restored. This effectively protects both the IC and the LED lamp from overheating damage. The DW8502 has an ultra‑low quiescent current of only 120µA (typical), resulting in lower power consumption and higher efficiency. The DW8502 supports high‑frequency PWM dimming via the EN pin. The TO263‑5L and TO220‑5L packages provide excellent thermal dissipation, making the device suitable for long‑term operation in automotive and high‑power scenarios.
DW8502 Product Core Advantages
● AEC-Q100 qualified – meets stringent automotive reliability requirements, ready for front‑end and after‑market automotive lighting projects
● Ultra‑high output current: up to 2.5A adjustable constant current – perfect for high‑power LEDs and automotive headlamps, no need for paralleling multiple ICs
● 5–40V wide input voltage – compatible with 12V/24V automotive and industrial power systems, stable constant current under voltage fluctuations
● Low dropout: only 1V @1A – lower heat generation and higher efficiency under high current, reducing thermal management burden
● Automotive‑grade thermal foldback protection – automatically reduces current at high temperature, ensuring stable long‑term operation and extending LED lifespan
● Supports high‑frequency PWM dimming – flicker‑free, fast response, meeting automotive lighting dimming requirements
● Single‑resistor current setting – minimal external components, low BOM cost, ideal for automotive and high‑density PCB designs
● TO263/TO220 high‑power packages – superior thermal dissipation, meeting long‑term reliability requirements for automotive and industrial applications
● No EMI interference – simplifies compliance with automotive EMC standards, reducing certification efforts
DW8502 Driver Features
● Stable constant current output even when input supply voltage or load voltage varies – ±3% current accuracy
● Input voltage range: 5V to 40V wide input, covering common automotive and industrial supplies
● Low dropout voltage: 1V @ ILED = 1A – maintains low loss even at high current
● Maximum adjustable output current: 2.5A – satisfies high‑power LED module drive requirements
● Built‑in thermal foldback – automatic over‑temperature protection prevents LED damage
● PWM dimming control – recommended dimming frequency ≤30kHz, flicker‑free operation
● Output current set by external resistor – simple circuit design and convenient tuning
● Standard high‑power packages: TO263‑5L (10.1mm×14.85mm×4.57mm), TO220‑5L (10.10mm×28.85mm×4.57mm)
● Fully compatible pin‑to‑pin replacement for A711, AMC7140, etc. – no PCB redesign required
DW8502 Key Electrical Parameters
| Parameter | Typical Value | Unit |
| Input Voltage | 5~40 | V |
| Output Current | 0~2500 | mA |
| Dropout Voltage | 1.0@1000mA | V |
| Current Accuracy | ±3% | -- |
| Automotive Qualification | AEC-Q100 | -- |
| Thermal Foldback Threshold | 140 | °C |
| Dimming Method | PWM | -- |
DW8502 Pin Configuration & Package Dimensions
| Pin No. (DW8502) | Pin Name | Function Description |
| 1 | VDD | Power supply input, supports 5–40V wide voltage |
| 2 | RS | Output current set input, connect resistor to GND to set LED current |
| 3 | GND | Ground, connect to system ground |
| 4 | EN | Output enable control, active high; supports PWM dimming, recommended frequency ≤30kHz |
| 5 | OUT | LED constant current output; reverse current determined by external resistor |
| 6 | HS | Heat sink tab, usually connected to ground for enhanced thermal dissipation |
Internal Block Diagram
Typical Application Circuits
Multiple DW8502 in Parallel
DW8502 Applications
● AEC-Q100 automotive grade: automotive LED headlamps, fog lights, DRLs, turn signals, welcome lights
● Autonomous vehicle lighting, construction vehicle lights, special vehicle lighting
● High-power LED wall washers, floodlights, stage lights, landscape lighting
● Industrial lighting, high-power LED modules, mining lamps, searchlights
● High-power LED street lights, tunnel lights, square lights, architectural lighting
● Automotive grade constant current sources, DC/DC high-current current regulation companion solutions
● Channel signage or landscape lighting, RGB backlighting
● Stable current DC/DC or AC/DC, general constant current sources
Compatible Replacement Models & Advantage Comparison
DONGWOON DW8502 AEC-Q100 automotive grade is a direct PIN‑TO‑PIN replacement for: A711, A711PGT, A711VGT, AMC7140, AMC7140DLGT, AMC7140DLGT-A, AT7316, AT7316T
● Advantage 1: AEC-Q100 qualified – ready for front‑end and after‑market automotive lighting projects, meets automotive reliability standards
● Advantage 2: Output current increased to 2.5A – meets high‑power and automotive headlamp requirements, no need for multiple ICs in parallel
● Advantage 3: Automotive‑grade high‑power package – superior thermal dissipation, far more reliable than standard industrial‑grade ICs
● Advantage 4: DONGWOON Korea original stable supply – eliminates obsolescence and automotive supply shortage issues
● Advantage 5: Optimized for automotive and high‑power applications – flicker‑free PWM dimming at high current, more stable response
DONGWOON Linear Constant Current Solutions Recommendation
| DW8501 | DW8502 | DW8505A | DW8506 | DW8506A | DW3505A | |
| Input Voltage (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) | ≤1.5A adjustable | ≤2.5A adjustable | ≤100mA adjustable | ≤100mA adjustable | Fixed 60mA | ≤300mA adjustable |
| Dropout | 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 | Thermal foldback | Thermal foldback | Thermal foldback | Thermal foldback | Thermal foldback | Thermal foldback |
| Package | SOT223-5L TO252-5L | TO263-5L TO220-5L | SOT23-5L | SOT23-5L | WLCSP | SOT-89-5L |
| Typical Circuit |  |  |  |  |  |  |
Brand Distribution & Services
GSMicro Semiconductor (Shenzhen) Co., Ltd. (formerly LUMENCHIP founded in 2010, rebranded as GSMicro in 2023) is an official authorized distributor of DONGWOON Korea, specializing in mixed-signal ICs and power management solutions. We provide high‑reliability LED driver solutions to our customers.
GSMicro offers a rich portfolio of distributed brands including DONGWOON Korea, China Resources Micro, Huajing Micro, Yongyuan Micro, and Gongcheng Semiconductor, providing one‑stop services for automotive lighting, industrial lighting, and consumer electronics.
GSMicro adheres to the corporate values of "Striver‑oriented, customer‑centric, value‑driven", focusing on technology and product realization of distributed ICs to promote the sustainable development of green intelligent technologies.
Official Website: https://www.gs-micro.com
Frequently Asked Questions (FAQ)
Can DW8502 directly replace A711 or AMC7140?
What is the difference between DW8502S and DW8502T? How to choose?
What does AEC-Q100 qualification mean for DW8502?
What is the maximum efficiency of DW8502? Does it cause EMI issues?
How to request samples, get pricing, or receive technical support for DW8502?
DONGWOON DW8502 Benefits & Application Conditions.pdf
♦ DONGWOON DW8502 Benefits & Required Application Conditions
Key Benefits:
a. Eliminate one DC/DC stage to save cost and improve efficiency; module efficiency up to 93%~98%
b. Easily pass EMC compliance testing
c. Extremely low component count, low cost, simple PCB layout
d. Only one wire per LED string between strip and driver, easy assembly
e. DW8502 VDD 40V, Output 23V voltage rating; TO-220 package with heatsink mounting for high reliability
f. DW8502 features EN pin for shutdown protection and Rs pin for current adjustment via temperature, photocoupler or switching devices
Required Operating Conditions:
a. LED Vf values must be sorted to narrow variation range, e.g. 3.1~3.3V, 3.5~3.6V
b. AC/DC output voltage must be adjusted to: Total max LED Vf + 0.5Vdrop (ILED=350mA). Example: 10S LED 3.1~3.3V → Input = 3.3×10+0.5=33.5V → Set to 35V±1V
c. Series resistor between VDC and VDD to limit surge voltage; parallel capacitor on EN pin for soft start (not required if PWM signal is applied)
d. Use TO-220 package with proper heatsink (metal housing) at high temperature; keep IC heatsink temperature between 50~75℃ during operation
Efficiency Calculation Example (48V Input):
At Vdrop = 3V, after 1 hour burn-in, DW8502 (TO263 package) temperature is only 42.0℃ (Ambient 28℃)
♦ DONGWOON DW8502 Parallel Application Schematic for High Current
- Grade And Comment
- Question And Answer
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