AC-DC Lighting


PT1919

PT1919 is an ultra-high voltage linear LED driver with constant power function. It has high input voltage range which is from 20~400V, and the current drive capability up to 200mA. PT1919 can drive several LEDs from rectified AC voltage, applied for high forward voltage LED strings. With a few external components and compact layout, It can be easily and flexibly applied to various small or flat LED lightings.

PT1919 integrates multiplier, greatly improve the power factor and achieve ultra-low THDi (compatible with IEC61000-3-2). The linear LED driver need no magnetic components, which avoids EMI interference issues.

PT1919 employs proprietary closed-loop mode control to achieve the output current constant. It has excellent line regulation and load regulation. PT1919 monitors the rectified AC voltage, to keep the input power constant.PT1919 LED current can be modulated using PWM dimming function, The PWM dimming ratio is over 100:1.

Integrates smart thermal protection to prevent the driver damage. When the junction temperature rises to 142°C, the output current linearly decreases. When the junction temperature reaches approximately 160°C, the driver will shut down.

FEATURES


● Input voltage: 20V~400V

● Integrated 700 V Mosfet

● Proprietary closed-loop control, no external capacitor for compensation network

● Excellent line regulator

● Constant input power and output power

● Maximum 200mA peak output current

● Output current accuracy: better than ±5%

● VDD can output 5V 1 mA

● Supports multiple drivers parallel application, meet high current design.

● Higher power factor and lower THDi

● High efficiency

● Integrated PWM dimming function; Over 100:1(800Hz) PWM dimming ratio

● Fewer external components

● LED open-circuit and short-circuit protection

● Low standby power dissipation, Psb<0.04W @ PWM at low level

● Smart thermal protection

- TJ>142°C，Output current decreases

- TJ>160°C，Driver shut down

● Package Type- ESOP 8

APPLICATIONS


● LED bulb

● LED tube

● General LED lighting

資源下載

Documentation

TitleFileVersionDate
DatasheetPT1919c.pdfV1.02022/12/1

Tools

Application Note

TitleFileVersionDate
PT1919