Àû²©¡¤(¼¯ÍÅ)ÓÐÏÞ¹«Ë¾¹ÙÍø

General Description

The MAX5069 is a high-frequency, current-mode, pulse-width modulation (PWM) controller (with dual MOSFET drivers) that integrates all the building blocks necessary for implementing AC-DC or DC-DC fixed-frequency power supplies. Isolated or nonisolated push-pull and half/full-bridge power supplies are easily constructed using either primary- or secondary-side regulation. Current-mode control with leading-edge blanking simplifies control-loop design and a programmable internal slope-compensation circuit stabilizes the current loop when operating at duty cycles above 50.

An input undervoltage lockout (UVLO) programs the input-supply startup voltage and ensures proper operation during brownout conditions.

Features

? Current-Mode Control with 47?A (typ) Startup Current

? Oscillator Frequency Programmable to 2.5MHz

? Resistor-Programmable ¡À4.5 Accurate Switching Frequency

? Dual Gate-Drive Output for Half/Full-Bridge or Push-Pull Applications

? Rectified 85VAC to 265VAC, or 36VDC to 72VDC Input (MAX5069A/B)

? Input Directly Driven from 10.8V to 24V (MAX5069C/D)

? Programmable Dead Time and Slope Compensation

? Programmable Startup Voltage (UVLO)

? Programmable UVLO Hysteresis (MAX5069B/C)

? Frequency Synchronization Input (MAX5069A/D)

? -40¡ãC to +125¡ãC Automotive Temperature Range

? 16-Pin Thermally Enhanced TSSOP-EP Package

Applications

?? Universal-Input AC Power Supplies

?? Isolated Telecom Power Supplies

?? Networking System Power Supplies

?? Server Power Supplies

?? Industrial Power Conversion