MAX5069

Features:

♦ Current-Mode Control with 47A (typ) Startup Current
♦ Oscillator Frequency Programmable to 2.5MHz
♦ Resistor-Programmable ±4.5% 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°C to +125°C Automotive Temperature Range
♦ 16-Pin Thermally Enhanced TSSOP-EP Package


Application

Universal-Input AC Power Supplies
Isolated Telecom Power Supplies
Networking System Power Supplies
Server Power Supplies
Industrial Power Conversion


Pinout




Specifications

IN to PGND .............................................................-0.3V to +30V
IN to AGND..............................................................-0.3V to +30V
V_CC to PGND............................................................-0.3V to +13V
V_CC to AGND............................................................-0.3V to +13V
FB, COMP, CS, HYST, SYNC, REG5 to AGND ...............-0.3V to +6V
UVLO/EN, RT, DT, SCOMP, FLTINT to AGND ...............-0.3V to +6V
NDRVA, NDRVB to PGND................................-0.3V to (V_CC + 0.3V)
AGND to PGND.........................................................-0.3V to +0.3V
Continuous Power Dissipation (T_A = +70°C)
   16-Pin TSSOP-EP (derate 21.3mW/°C above +70°C)..1702mW
Operating Temperature Range..........................-40°C to +125°C
Maximum Junction Temperature .......................................+150°C
Storage Temperature Range ............................-60°C to +150°C
Lead Temperature (soldering, 10s) ..................................+300°C


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 pushpull 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) of MAX5069 programs the input-supply startup voltage and ensures proper operation during brownout conditions.

A single external resistor programs the oscillator frequency from 50kHz to 2.5MHz. The MAX5069A/D provide a SYNC input for synchronization to an external clock. The maximum FET-driver duty cycle for the MAX5069 is 50%. Programmable dead time allows additional flexibility in optimizing magnetic design and overcoming parasitic effects. Programmable hiccup current limit provides additional protection under severe faults.

The MAX5069 is specified over the -40°C to +125°C automotive temperature range and is available in a 16-pin thermally enhanced TSSOP-EP package. Refer to the MAX5068 data sheet for single FET-driver applications.

Warning: The MAX5069 is designed to work with high voltages. Exercise caution.