Product Key Parameter Summary: DW8506 is a low dropout linear constant current LED driver IC manufactured by DONGWOON (South Korea). It features 6.5~40V wide input voltage, adjustable constant current up to 100mA with 0.5V dropout voltage @ 50mA, built-in thermal derating protection, and SOT23-5L package. It supports direct pin-to-pin replacement for BCR401W / BCR420U. As an authorized distributor, we provide in-stock products, free samples and full technical support.
DONGWOON DW8506 Low Dropout Linear Constant Current LED Driver IC | 100mA Adjustable | SOT23-5L | Low Power Backlight Solution | Drop-in Replacement for BCR401W/BCR420U
DW8506 is a wide-voltage low dropout linear constant current LED driver IC developed by DONGWOON ANATECH from South Korea. The input voltage range covers 6.5V to 40V, and the output current is adjustable from 0 to 100mA. It integrates internal MOSFET and thermal derating protection circuit. Packaged in SOT23-5L, this device can be used as a pin-to-pin replacement for mainstream models including BCR401W and BCR420U. It is highly suitable for low-power backlight, signage lights, RGB backlight and other applications requiring low EMI performance and low dropout voltage. Compared with traditional solutions, DW8506 achieves an ultra-low dropout voltage of 0.5V @ 50mA and comes with built-in thermal derating protection, which effectively reduces heat generation and improves overall system reliability in 12V/24V power supply systems.
Core Highlights: 6.5~40V Wide Input Voltage | 0~100mA Adjustable Constant Current | 0.5V Low Dropout @ 50mA | Built-in Thermal Derating Protection | SOT23-5L Package | Low EMI Noise | Direct Pin-to-Pin Replacement for BCR401W/BCR420U
DW8506 Ordering Information / Package & Packaging Specifications
| Part Number | Marking Code | Package Type | Packaging Style |
|---|
| DW8506 | DW8506 | SOT23-5L | 2500 pcs / Reel |
DW8506 Key Features & Advantages
● Excellent constant current stability against input voltage and load fluctuation
● Wide input voltage range: 6.5V ~ 40V, compatible with 12V/24V automotive and industrial power systems
● 0~100mA adjustable output current, set by single external resistor, constant current accuracy ±5%
● Ultra-low dropout voltage: Max 0.5V @ 50mA, lower power dissipation and higher conversion efficiency
● Integrated thermal derating protection, output current will be automatically reduced above 140℃ for long-term safe operation
● Minimal external components (only 1 resistor required), simple circuit design, lower BOM cost and easy PCB layout
● Compact SOT23-5L package, ideal for high-density SMT mass production
DW8506 Electrical Characteristics | Datasheet Parameters
| Parameter | Typical Value | Unit |
|---|
| Input Voltage | 6.5~40 | V |
| Output Current | 0~100 | mA |
| Dropout Voltage | 0.5 @ 50mA | V |
| Constant Current Accuracy | ±5% | -- |
| Thermal Derating Threshold | 140 | ℃ |
| Dimming Mode | Not Supported | -- |
| Package | SOT23-5L | -- |
DW8506 Pinout Definition & Package Dimension | Pin Diagram
| Pin No. | Pin Name | Function Description |
|---|
| 1 | N/C | No Connection |
| 2 | GND | Ground |
| 3 | RS | Current Setting Pin, connect external resistor to GND |
| 4 | VDD | Power Supply Input |
| 5 | OUT | LED Constant Current Output |
DW8506 Internal Block Diagram | Internal Structure
DW8506 Typical Application Circuits | Reference Design
The above circuits cover 6.5V/12V/24V standard LED driving, multi-LED series connection and high voltage input step-down expansion solutions. The output current is configured via RS resistor. No extra components are required if dimming function is not needed.
DW8506 Applications | Target Markets
● LED bulbs, mini lighting equipment & portable lighting
● Signage lights, indicator lights & decorative LED lighting
● Panel display, home appliance panel & backlight lighting
● RGB backlight LED driver modules
● Supporting circuit for DC/DC & AC/DC current regulators
● Automotive interior lighting & signal indicator lamps
● General constant current source & industrial control constant current power supply
DONGWOON Linear Constant Current Driver Product Lineup
| Model / Parameters | DW8501 | DW8502 | DW8505A | DW8506 | DW8506A | DW3505A |
|---|
| Input Voltage (V) | 5~40 | 5~40 | 5~40 | 6.5~40 | 6.5~40 | 5~40 |
|---|
| 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 | Max.0.3V @ 300mA | Max.1V @ 1A | Max.0.1V @ 60mA | Max.0.5V @ 50mA | Max.0.6V @ 60mA | Max.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 | SOT89-5L |
|---|
| Typical Circuit |  |  |  |  |  |  |
|---|
DW8506 Cross Reference & Competitive Advantages
DONGWOON DW8506 is a full Pin-to-Pin replacement for: BCR401W, BCR420U
● Wider operating voltage range (6.5~40V) for more application scenarios
● Built-in thermal derating protection, not available on most competing devices
● ±5% constant current accuracy, better than competitors' ±10% tolerance
● Lower dropout voltage for higher efficiency and less heat dissipation
DW8506 vs Competitors Parameter Comparison
| Item | DW8506 | BCR401W | BCR420U | Advantage |
|---|
| Brand | DONGWOON | Infineon | Infineon | Stable long-term supply |
| Operating Voltage | 6.5~40V | Up to 18V | Up to 40V | Broader voltage coverage |
| Package | SOT23-5L | SOT343-4L | SC74-6L | Standard universal package |
| PWM Dimming | Not Supported | Not Supported | Supported | Competitor has dimming function |
| Max Output Current | 100mA | 60mA | 150mA | Stronger driving capability |
| Thermal Protection | Yes | No | No | Higher reliability under high temperature |
| Dropout Voltage | 0.5V @ 50mA | 1.2V | 1.4V | Higher efficiency & lower heat |
| Current Accuracy | ±5% | ±10% | ±10% | Better current consistency |
Evaluation Board (EVB) Comparison
| Item | DW8505A | DW8506 | BCR401W | BCR420U |
|---|
| EVB Photo |  |  |  |  |
| RSET (20mA) | 36KΩ | 6.04KΩ | 80Ω | 100Ω |
Authorized Distributor & Services
GS Micro Semiconductor (Shenzhen) Co., Ltd. is the authorized official distributor of DONGWOON ANATECH (South Korea). We focus on linear constant current drivers and power management ICs, providing complete datasheets, reference designs, free sample testing and professional technical after-sales support to accelerate customers' mass production. We maintain warehouses in Shenzhen and Shanghai to ensure fast worldwide delivery.
Official Website: http://huimai2.com
Frequently Asked Questions (FAQ)
Can DW8506 directly replace BCR401W or BCR420U?
Yes. DW8506 features pin-to-pin compatibility with BCR401W/BCR420U in SOT23-5L package. It supports wider 6.5~40V input voltage and integrates thermal derating protection, so no PCB modification is required for direct replacement.
Does DW8506 support PWM dimming?
No. DW8506 is a pure constant current driver without dimming pins. Please select DW8505A or DW3505A if PWM dimming function is required.
What is the trigger temperature of thermal derating protection?
When the chip junction temperature reaches approximately 140℃, the output current will be automatically reduced to prevent overheating damage and enhance system reliability.
How to request samples or get bulk quotation?
Please contact our sales team via phone: +86 18018703531 (He Long), or send email to
[email protected]. We will provide product samples, technical support and competitive bulk pricing.
