The ADP1047/ADP1048 are digital power factor correction (PFC) controllers that provide accurate input power metering capability and inrush current control for ac/dc systems. The ADP1047 is designed for single phase PFC applications; the ADP1048 is designed especially for interleaved and bridgeless PFC applications. The digital PFC function is based on a conventional boost PFC with multiplication of the output voltage feedback combined with the input current and voltage to provide optimum harmonic correction and power factor for ac/dc systems.
The ADP1047 and ADP1048 are digital power factor correction (PFC) controllers that provide accurate input power metering and inrush current control for AC/DC systems. ADP1047 targets single‑phase PFC applications, while ADP1048 supports interleaved and bridgeless operation. Both devices convert all signals to the digital domain and expose parameters via a PMBus interface, allowing system designers to optimize efficiency and reduce component count.
Key features include flexible digital PFC control, true‑RMS power metering, programmable fault detection, frequency dithering for EMI reduction, and an 8 kB EEPROM that can be programmed through a graphical GUI. The controllers operate from a 3.3 V supply in a 24‑lead QSOP package and are rated for temperatures from –40 °C to +85 °C, making them suitable for computing, server, networking, industrial, and medical power supplies.
| Operating Supply Voltage (VDD) | 3.0 V – 3.6 V |
|---|---|
| Shutdown Current (IDD_SD) | 100 µA |
| EEPROM Size | 8 kB |
| Switching Frequency Range | 30 kHz – 400 kHz (programmable) |
The devices operate from a 3.0 V to 3.6 V supply voltage (VDD).
Each controller includes an 8 kB EEPROM for storing programmed values.
The switching frequency can be programmed between 30 kHz and 400 kHz.