LED Driver IC (PT6971)

Manufacturer

Princeton Technology Corp.

PT6971 is a boost DC/DC converter with one channel constant current regulator, which provides 10mA to 30mA current for up to 8 LEDs in series. The power supply is from 4V to 15V and the max output voltage is 28V. PT6971 provides both PWM dimming and analog dimming functions. The minimum PWM dimming on time is 125ns, which means 0.25% dimming duty-cycle at 20KHz is available.

 

PT6971  also   provides  much  protections,   such  as under  voltage lockout,  cycle  by cycle input  current limit,  output  over voltage protection,  flywheel diode open  protection,  feedback  over  voltage  protection, thermal shutdown protection and so on.

 

PT6971 operates at fixed 600KHz, allowing the use of tiny external components to save space and cost.

FEATURES
• 4~15V Input Voltage
• 10mA~30mA LED Current with ±3% matching
• Drive Up to 8 LEDs
• 600kHz Switching Frequency
• Typical less than 1uA Standby Current
• 28V Output Over Voltage Protection
• LED Open/Short Protection
• Flywheel Diode Open Protection
• Output Short to GND Protection
• 20kHz 0.25% PWM Dimming Available
• DFN8 Package