ADI公司的ADP1053是三路数字电源控制器,基于电压模式PWM架构,能对三路单独输出提供控制,监视和保护,其它两路带反馈控制,另一路带固定占空比而未调整电压,三路的开关频率从50kHz到625kHz可单独编程,适用于隔离和非隔离的DC/DC转换器,AC/DC转换器.本文介绍了ADP1053主要特性, 功能方框图, 简化应用电路图以及两种典型应用电路图.
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. 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 (UVP), overvoltage protection (OVP), and overtemperature protection (OTP).
ADP1053主要特性:
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应用:
AC-to-DC power supplies
Isolated dc-to-dc power supplies
Intermediate rail power supplies
Nonisolated dc-to-dc power converter
图1.ADP1053功能方框图
图2.ADP1053简化应用电路图
图3.ADP1053应用电路(1):降压预调整+固定PWM全桥拓扑和同步整流
图4.ADP1053应用电路(2):一路全桥整流两路输出
