New offline AC/DC primary-side PWM controllers for flyback converters

Elevation Semiconductor has released two high-efficiency power ICs with smaller footprints for fast-charging solutions.

The HL9510 and HL9512 are flyback PWM controller ICs that function in a QR mode to greatly enhance the system efficiency and power density. These ICs provide constant output voltage regulation via the optocoupler feedback controller or shunt regulator and integrate high-voltage startup.

Their protection includes VDD-OVP, Brown-out protection, DMAG-OVP, DMAG-UVP, IC internal OTP, and IC external thermal SD.

The brown-in voltage is programmed by an external DMAG pin resistor and provides a wide VDD operating range to cover variable output mode applications, including USB-PD/PPS or conventional DP/DN protocol communication. Its protection is also implemented with auto-restart mode. The VDD-OVP, DMAG-OVP, and external SD protection may be configured with auto-restart or latch mode, and the DMAG-UVP can be configured with auto-restart or long auto-restart mode.

The HL9510 is created to integrate an internal HV startup circuit, whereas the HL9512 can be done by the external MOS combined IC’s AUX and ST pins.

The HL9510 is offered in a 10-lead SOIC package ideal for USB PD/QC portable device battery chargers, high-efficiency AC/DC power adapters, and a power supply with fixed or variable output voltage. The HL9512 comes in the same package and is perfect for smartphones, tablet PC battery chargers, portable device adapters, and flyback power suppliers with low and/or variable output voltage.

"The new flyback PWM controllers add another dimension to our fast-charging solutions portfolio with their enhanced system efficiency and power density. Their smaller footprint also plays a critical role in key applications with limited board space,” said David Nam, CEO of Elevation Semiconductor.