The ADP1043A is a secondary side power supply controller IC designed to provide all the functions that are typically needed in an ac-to-dc or isolated dc-to-dc control application.
The ADP1043A is a secondary‑side controller designed for isolated power‑supply applications such as AC‑to‑DC and isolated DC‑to‑DC converters. It integrates digital control loops, remote and local voltage sensing, primary and secondary current sensing, PWM generation, current sharing, OrFET control, and an I²C interface for programming and monitoring. The device also provides extensive fault detection, protection features, and a built‑in EEPROM for configuration storage.
The handbook includes detailed specifications, absolute maximum ratings, thermal resistance data, pin configurations, EEPROM password lock procedures, and information on the free software GUI for programming. It also lists typical application circuits, functional block diagrams, and register descriptions to aid designers in implementing the controller in power‑supply designs.
| Supply Voltage (VDD) Typical | 3.3 V |
|---|---|
| Operating Temperature Range | -40°C to +85°C |
| IDD Normal Operation | 20 mA |
| Output Low Voltage (VOL) | 0.4 V |
The controller operates from a single 3.3 V supply, with a VDD range of 3.1 V to 3.6 V.
The EEPROM is password‑locked; the factory default password is 0x00 and it can be changed by writing to specific registers.
Configuration and monitoring are performed via an I²C interface.