MAX16825
High-Voltage, Three-Channel Linear High-Brightness LED Drivers
Independently Dimmable, Three-Channel LED Drivers for Compact and Simple Driver Circuits
Part Details
- 6.5V to 28V Operating Range
- Outputs Connected to 36V Supply for Long LED Strings
- Three 36V-Rated Output Channels with Independently Adjustable LED Current
- 150mA Output Current Per Channel
- ±5% LED Current Accuracy
- PWM Dimming
- Three Independent Dimming Control Inputs (MAX16824)
- 4-Wire Serial Interface LED Current Chopping (MAX16825)
- +5V (±5%) Regulated Output with 4mA Source Capability
- Fast Transient Dimming Response
- 200mV Current-Sense Reference Reduces Power Loss
- Thermal Shutdown
- -40°C to +125°C Operating Temperature Range
- Thermally Enhanced, 16-Pin TSSOP Exposed Paddle Package
The MAX16824/MAX16825 three-channel LED drivers operate over a 6.5V to 28V input voltage range. These devices provide three open-drain constant-current-sinking outputs that are rated to 36V and deliver up to 150mA of current to each string of high-brightness LEDs (HB LEDs). The current at each output is programmable by means of an external current-sense resistor. The MAX16824 features three PWM inputs that control the duty cycle of the output current, allowing a wide LED dimming range to be implemented. The PWM inputs also function as on/off control for each corresponding output. The MAX16825 offers a 4-wire serial interface, a 3-bit shift register, and a 3-bit transparent latch. The serial interface allows a microcontroller to configure the output channels using four inputs (DIN, CLK, LE, active-low OE) and a data output (DOUT). DOUT allows multiple drivers to be cascaded and operated together.
The MAX16824/MAX16825's on-board pass elements minimize the need for external components, while at the same time, providing ±5% LED current accuracy. Additional features include a +5V (±5%) regulated output with 4mA output current capability and thermal protection.
The MAX16824/MAX16825 are available in a thermally enhanced 16-pin TSSOP-EP package and specified over the -40°C to +125°C temperature range.
Applications
- Architectural and Decorative Lighting
- Automotive Lighting
- Indoor and Outdoor LED Video Displays
- Industrial Lighting
- LCD Display Backlighting
- Mood Lighting
Documentation
This is the most up-to-date revision of the Data Sheet.
Evaluation Kits
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