The PT16753 is buck topology switching regulator with constant current output for high-power LEDs driving purpose. It integrates a 50V high side N-channel 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.

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 signal

● Internal loop compensation

● Under voltage lockout (UVLO) and thermal shutdown protection

● Low power shutdown (1μA typical)

● Robust protection against:

- Adjacent pin-to-pin short

- Pin-to-GND short

- LED open/short faults

● Spread-Spectrum switching frequency reduces EMI conduction emission.

● Operation switching frequency from 200KHz to 2MHz

● Package Type- HSOP 8 (with exposed thermal pad)

APPLICATIONS


● Daytime running lights

● Front and rear fog lights

● Turn signal lights

● Decoration spot light

● Dimmable interior lights

資源下載

Documentation

TitleFileVersionDate
DatasheetPT16753.pdfV1.02024/11/1
DEMO test reportPT16753 DEMO test report_20240830.pdfREV1.02024/8/30
DEMOPT16753_DEMO_20240830.pdf  

Tools

Application Note