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PT16753 - Constant Current Buck LED Driver

Description

The PT16753 is buck topology switching regulator with constant current output for high-power LEDs driving purpose.

It integrates a 50V high side Nchannel MOSFET switch for step down conversion.

Features

  • AEC-Q100 Grade 1, operating temperature range TA = -40°C ~ 125°C.
  • 6 to 48 V supply voltage.
  • Asynchronous rectifier buck regulator with average output current mode control.
  • 2.5 Amps continue output current on a 2- layer PC board.
  • 3 Amps maximum output current in TA=25°C on a 4-layer PC board with additional heatsink.
  • Cycle-by-cycle current limit.
  • Integrated high side MOSFET switch.
  • PWM dimming controlled by logic level signa.

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Datasheet Details

Part number PT16753
Manufacturer PTC
File Size 577.09 KB
Description Constant Current Buck LED Driver
Datasheet download datasheet PT16753 Datasheet

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Full PDF Text Transcription

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Preliminary PT16753 Constant Current Buck LED Driver DESCRIPTION The PT16753 is buck topology switching regulator with constant current output for high-power LEDs driving purpose. It integrates a 50V high side Nchannel MOSFET switch for step down conversion. The output current control loop operating in average current mode and the switch current is controlled cycle-by-cycle with an adaptive on-time structure. Output current is user-defined by an external current sense resistor and output voltage depends on numbers of total series LEDs in a single string. This ensures the optimal system efficiency. LED dimming is accomplished by a direct logic input pulse width modulation (PWM) signal at the EN pin. The device has thermal pad on the bottom side for enhanced thermal dissipation.
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