DW8501 is a wide-voltage linear constant current LED driver IC developed by DONGWOON ANATECH from South Korea. It supports an input voltage range from 5V to 40V with a maximum output current of 1.5A. The device integrates internal MOSFET and thermal derating protection circuit. Available in SOT223-5L and TO252-5L packages, it serves as a pin-to-pin alternative for mainstream models including AMC7140 and AT7316, and is ideally applied to automotive headlamps, stage lights, wall washers and other EMI-sensitive lighting equipment. Featuring an ultra-low dropout voltage of 0.3V and PWM dimming capability, DW8501 effectively reduces heat generation and enhances overall system reliability in 12V and 24V power supply systems.

DW8501 Ordering Information / Package & Packaging Specifications

Key Features & Advantages

• ● Wide input voltage range 5V~40V, compatible with 12V/24V/36V automotive and lighting systems

• ● Adjustable constant current output up to 1.5A with ±3% current accuracy

• ● Low dropout design: only 0.3V dropout at 1A output, lower power dissipation and higher efficiency

• ● Built-in thermal derating protection, output current reduces automatically under over-temperature to protect IC and LED lamps

• ● High-frequency PWM dimming supported, flicker-free performance and fast response

• ● Minimal external components, current set by single resistor, low BOM cost and easy for mass production

• ● Low EMI emission, easily compliant with automotive and lighting industry safety standards

Key Electrical Characteristics

Pinout Definition

Internal Block Diagram

Typical Application Circuits

The circuits above show the typical connection of DW8501 for automotive headlamps. The LED operating current is configured via RS resistor, and stepless dimming is realized by feeding PWM signal to the EN pin. This solution requires no external MOSFET and uses very few peripheral components, which greatly reduces overall system cost.

Application Fields

• ● Automotive headlamps, fog lamps, turn signal lights, logo lights & welcome lights

• ● LED wall washers, stage lights, flood lights & linear lights

• ● LED strips, advertising light boxes, lighting modules & panel lights

• ● Flashlights, desk lamps, mining lamps & plant grow lights

• ● Autonomous vehicle lamps & automotive interior lights

• ● General constant current sources & supporting circuits for DC/DC current regulators

DONGWOON Linear Constant Current Driver Product Portfolio

Model / Parameters	DW8501	DW8502	DW8505A	DW8506	DW8506A	DW3505A
Input Voltage (V)	5~40V	5~40V	5~40V	6.5~40V	6.5~40V	5~40V
Output Current	Adjustable up to 1.5A	Adjustable up to 2.5A	Adjustable up to 100mA	Adjustable up to 100mA	Fixed 60mA	Adjustable up to 300mA
Dropout Voltage	0.3V @ 300mA	1V @ 1A	0.1V @ 60mA	0.5V @ 50mA	0.6V @ 60mA	0.2V @ 60mA
Dimming	PWM	PWM	PWM	—	—	PWM
Protection	Thermal Derating	Thermal Derating	Thermal Derating	Thermal Derating	Thermal Derating	Thermal Derating
Package	SOT223-5L TO252-5L	TO263-5L TO220-5L	SOT23-5L	SOT23-5L	WLCSP	SOT-89-5L
Typical Circuit

Cross Reference & Competitive Advantages

This IC is a direct pin-to-pin replacement for the following parts: AMC7140, AMC7140DLGT, AMC7140DLGT-A, AT7316, AT7316T, DD311, SM1506, NU511.

• ● Broader voltage range 5~40V, no PCB modification required for existing vehicle designs

• ● Lower dropout voltage, less heat generation and higher working efficiency

• ● Integrated thermal derating protection, while most competing products have no temperature control function

• ● Stable original manufacturer supply, free from risks of part discontinuance

• ● PWM dimming supported with flicker-free performance, ideal for automotive and general lighting applications

Authorized Distributor & Services

GS Micro Semiconductor (Shenzhen) Co., Ltd. is a tier-one authorized distributor of DONGWOON ANATECH from South Korea. We focus on mixed-signal ICs and power management solutions, and rank as a leading supplier of linear constant current driver ICs in China. Our product lineup covers full range DONGWOON devices including DW8501, DW8502 and DW8505A, delivering high-reliability LED driving solutions for automotive lamps, stage lights, wall washers and other industries. Warehouses are located in Shenzhen, Shanghai and Beijing to support fast domestic and international delivery.