Overview
The ADD5205ACPZ-RL is a four-channel white LED driver produced by Analog Devices Inc. This device is designed to drive up to four LED strings with adjustable current levels, making it suitable for various lighting applications. It operates using a current mode PWM boost regulator, ensuring efficient and stable output voltage across a wide range of input and output conditions.
Key Specifications
| Parameter | Specification |
|---|---|
| Input Voltage Range | 2.8 V to 18 V |
| Operating Frequency | 1 MHz fixed |
| Overvoltage Protection | 28 V fixed |
| LED Current per Channel | Up to 25 mA (adjustable with external resistor) |
| Number of LED Channels | 4 |
| Package Type | 12-Lead Lead Frame Chip Scale Package (LFCSP) |
| Package Dimensions | 3 mm × 3 mm × 0.75 mm |
| Temperature Range | −25°C to +85°C |
| Soft Start Functionality | Built-in soft start for boost converter |
| PWM Dimming | DC current level brightness control with PWM input |
Key Features
- White LED driver based on inductive boost converter
- Internal compensation and 1 MHz fixed operating frequency
- 28 V fixed overvoltage protection
- Built-in soft start for boost converter to prevent inrush current during startup
- Thermal shutdown protection to prevent thermal damage
- LED current adjustable up to 25 mA for each channel using an external resistor
- DC current level brightness control with PWM input
- LED open fault protection circuit for each channel
- High efficiency due to boost topology
Applications
The ADD5205ACPZ-RL is suitable for a variety of lighting applications, including:
- Automotive lighting systems
- Backlighting for LCD displays
- General lighting solutions requiring adjustable brightness
- Industrial lighting systems
- Consumer electronics with LED lighting
Q & A
- What is the input voltage range of the ADD5205ACPZ-RL?
The input voltage range is from 2.8 V to 18 V.
- How many LED channels does the ADD5205ACPZ-RL support?
The device supports up to 4 LED channels.
- What is the maximum current per LED channel?
The maximum current per LED channel is up to 25 mA, adjustable with an external resistor.
- Does the ADD5205ACPZ-RL have overvoltage protection?
Yes, it has a 28 V fixed overvoltage protection.
- How does the ADD5205ACPZ-RL control LED brightness?
The device controls LED brightness using DC current level with PWM input.
- What type of package does the ADD5205ACPZ-RL come in?
The device comes in a 12-Lead Lead Frame Chip Scale Package (LFCSP).
- What are the dimensions of the ADD5205ACPZ-RL package?
The package dimensions are 3 mm × 3 mm × 0.75 mm.
- What is the operating temperature range of the ADD5205ACPZ-RL?
The operating temperature range is from −25°C to +85°C.
- Does the ADD5205ACPZ-RL have thermal shutdown protection?
Yes, it has thermal shutdown protection to prevent thermal damage.
- How does the ADD5205ACPZ-RL handle LED open faults?
The device has an LED open fault protection circuit that disables the faulty current regulator automatically.
