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Analog Devices / Maxim Integrated MAX25600 Synchronous Buck-Boost LED Controller

Analog Devices MAX25600 Synchronous 4-Switch Buck-Boost LED Controller is ideal as a seamless buck-boost LED driver for applications that require an efficient buck-boost LED driver with synchronous rectification. The device is also a solution for higher-power applications requiring a current source with PWM dimming capability. The Analog Devices MAX25600 Synchronous 4-Switch Buck-Boost LED Controller features a regulated LED current for LED string voltages from 0V to 60V.

The MAX25600 Controller provides a seamless transition between buck, boost, and buck-boost modes depending on the input-to-output voltage ratio. An additional fault flag benefit indicates open-LED, shorted LED, or thermal shutdown conditions. The LED Controller offers analog and digital PWM dimming and built-in analog PWM dimming at a dimming frequency of 200Hz.

Analog Devices MAX25600 Synchronous 4-Switch Buck-Boost LED Controller integrates a high-side p-channel dimming MOSFET driver for PWM dimming applications that require fast rising and falling edges of the LED current. Additionally, the MAX25600 has a robust output open and short protection, is AEC qualified, and is suitable for automotive applications.

Features

  • Integration minimizes BOM for high-brightness LED driver, saving space and reducing cost
    • Wide input voltage range from 5V to 60V
    • H-bridge single inductor buck-boost architecture
    • Constant-current and constant-voltage regulation
    • 28-pin TSSOP with EP pad and 28-pin (5mm x 5mm) TQFN with EP pad packages
  • Wide dimming ratio allows high contrast ratio
    • Analog and PWM dimming
    • Flicker-Free PWM dimming with spread spectrum
    • Integrated pMOS dimming FET gate driver
    • 200Hz on-board ramp simplifies PWM dimming
  • Protection features and wide temperature range increase system reliability
    • Short circuit, overvoltage, and thermal protection
    • LED current monitor and input current limiter
    • -40°C to +125°C operating junction-temperature range
  • AEC-Q100 qualified

Applications

  • Automotive exterior lighting
  • General lighting
  • Commercial lighting
  • Industrial lighting

Simplified Application Circuit

Application Circuit Diagram - Analog Devices / Maxim Integrated MAX25600 Synchronous Buck-Boost LED Controller

Block Diagram

Block Diagram - Analog Devices / Maxim Integrated MAX25600 Synchronous Buck-Boost LED Controller
發佈日期: 2019-06-28 | 更新日期: 2023-04-17