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MAX5069A Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX5069A Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 19 page 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-fre- quency 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 program- mable 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 opera- tion during brownout conditions. A single external resistor programs the oscillator frequen- cy 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 auto- motive 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. Applications Universal-Input AC Power Supplies Isolated Telecom Power Supplies Networking System Power Supplies Server Power Supplies Industrial Power Conversion Features ♦ Current-Mode Control with 47µA (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 High-Frequency, Current-Mode PWM Controller with Accurate Oscillator and Dual FET Drivers ________________________________________________________________ Maxim Integrated Products 1 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 RT REG5 IN VCC NDRVA NDRVB PGND AGND CS TOP VIEW MAX5069 TSSOP-EP SYNC(HYST*) SCOMP FB DT UVLO/EN COMP FLTINT *MAX5069B/C. Pin Configuration Ordering Information 19-3175; Rev 1; 7/04 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. *EP = Exposed pad. PART TEMP RANGE PIN-PACKAGE MAX5069AAUE -40°C to +125°C 16 TSSOP-EP* MAX5069BAUE -40°C to +125°C 16 TSSOP-EP* MAX5069CAUE -40°C to +125°C 16 TSSOP-EP* MAX5069DAUE -40°C to +125°C 16 TSSOP-EP* Selector Guide appears at end of data sheet. |
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