ADIADP1053 three-way digital power supply control solution

The ADP1053, based on a voltage mode PWM architecture, is a flexible, application dedicated digital controller designed for isolated and nonisolated dc-to-dc power supply applications. The ADP1053 enables highly efficient power supply design and facilitates the introduction of intelligent power management techniques to improve energy efficiency at a system level. The ADP1053 provides control, monitoring, and protection of up

to

three independent channel outputs. The eight flexible PWM outputs can be configured as three independent channels: two regulated channels with feedback control plus one additional unregulated channel with a fixed duty cycle and no voltage adjustment. cycle. The frequency of these three channels can be programmed individually from 50 kHz to 625 kHz; all channels can be synchronized internally or to an external signal.

All eight PWM outputs can also be assigned to enable a single-channel solution, which may be required in high power, high efficiency applications.

Features include differential voltage sensing, fast current sensing, flexible start-up sequencing and tracking, and synchronization between devices to reduce low frequency system noise. Protection and monitoring features include overcurrent protection (OCP), undervoltage protection (duty UVP), overvoltage protection (OVP), and overtemperature protection (OTP).

ADP1053 main features:

Configurable 8-PWM engine with up to 3 channels

2 independent digitally controlled channel outputs

Voltage mode PWM control with 625 ps resolution

Remote voltage sensing on both channels

Programmable compensation filters

Voltage feedforward option

Flexible start-up sequencing and tracking

Switching frequency: 50 kHz to 625 kHz

Frequency synchronization

Independent channel protections : OVP and OCP

2 independent OTP circuits

Programmable fault protection sequence

Volt-second balance and dual-phase current balance for interleaved configurations

On-board EEPROM

PMBus-compliant

Graphical user interface (GUI) for ease of programming

Available in a 40-lead, 6 mm × 6 mm LFCSP

ADP1053 Applications:

AC-to-DC power supplies

Isolated dc-to-dc power supplies

Intermediate rail power supplies

Nonisolated dc-to-dc power converter

Figure 1. ADP1053 functional block diagram

Figure 2. ADP1053 simplified application circuit diagram

Figure 3. ADP1053 application circuit (1): buck pre-regulation + fixed PWM full-bridge topology and synchronous rectification

Figure 4. ADP1053 application circuit (2): one full-bridge rectification and two outputs
For details, please see:
http://www.analog.com/static/imported-files/data_sheets/ADP1053.pdf