The AP3108L from Diodes Inc is a current-mode PWM DC-DC converter controller which supports high- voltage start-up operation. The device is intended for use in offline power supplies that require very low stand-by power consumption, high power density and a comprehensive set of protection functions.
When used in secondary-side USB Power Delivery and rapid charger controllers, it provides a versatile solution which supports a wide dynamic output- power range.
The AP3108L integrates a high- voltage start-up function through its HV pin, which removes the need for an external start-up resistor and reduces losses in stand-by mode. An X-CAP discharge function is also available through this HV pin, saving power by automatically discharging a connected X-CAP when the AC line voltage is off.
The AP3108L includes a 100V low drop-out regulator, which helps to provide for high output-voltage accuracy in applications which produce a wide range of output voltages.
The AP3108L offers versatile system- protection functions. These include constant output-current limitation, to maintain the same over-current limit over a wide output-voltage range.
The AP3108L is available in an SSOP-9 package, which has a small footprint.
- Secondary-side over- and under-voltage protections
- Cycle-by-cycle primary current limiting
- Brown-out protection
- Programmable external over-temperature protection
- 1.5μA start-up current
- 500mA maximum gate output current
- USB Power Delivery circuits
- Rapid chargers
- AC-DC power adaptors