MAX5069 19-3175 Rev 1 7/04 High-Frequency, Current-Mode PWM Controller with Accurate Oscillator and Dual FET Drivers General Description Features Current-Mode Control with 47A (typ) Startup The MAX5069 is a high-frequency, current-mode, Current pulse-width modulation (PWM) controller (with dual MOSFET drivers) that integrates all the building blocks Oscillator Frequency Programmable to 2.5MHz necessary for implementing AC-DC or DC-DC fixed-fre- Resistor-Programmable 4.5% Accurate quency power supplies. Isolated or nonisolated push- Switching Frequency pull and half/full-bridge power supplies are easily Dual Gate-Drive Output for Half/Full-Bridge or constructed using either primary- or secondary-side Push-Pull Applications regulation. Current-mode control with leading-edge Rectified 85VAC to 265VAC, or 36VDC to 72VDC blanking simplifies control-loop design and a program- Input (MAX5069A/B) mable internal slope-compensation circuit stabilizes the Input Directly Driven from 10.8V to 24V current loop when operating at duty cycles above 50%. (MAX5069C/D) An input undervoltage lockout (UVLO) programs the Programmable Dead Time and Slope input-supply startup voltage and ensures proper opera- Compensation tion during brownout conditions. Programmable Startup Voltage (UVLO) A single external resistor programs the oscillator frequen- Programmable UVLO Hysteresis (MAX5069B/C) cy from 50kHz to 2.5MHz. The MAX5069A/D provide a SYNC input for synchronization to an external clock. The Frequency Synchronization Input (MAX5069A/D) maximum FET-driver duty cycle for the MAX5069 is 50%. -40C to +125C Automotive Temperature Range Programmable dead time allows additional flexibility in 16-Pin Thermally Enhanced TSSOP-EP Package optimizing magnetic design and overcoming parasitic effects. Programmable hiccup current limit provides additional protection under severe faults. The MAX5069 is specified over the -40C to +125C auto- Ordering Information motive temperature range and is available in a PART TEMP RANGE PIN-PACKAGE 16-pin thermally enhanced TSSOP-EP package. Refer to the MAX5068 data sheet for single FET-driver applications. MAX5069AAUE -40C to +125C 16 TSSOP-EP* Warning: The MAX5069 is designed to work with high MAX5069BAUE -40C to +125C 16 TSSOP-EP* voltages. Exercise caution. MAX5069CAUE -40C to +125C 16 TSSOP-EP* MAX5069DAUE -40C to +125C 16 TSSOP-EP* *EP = Exposed pad. Applications Universal-Input AC Power Supplies Pin Configuration Isolated Telecom Power Supplies Networking System Power Supplies TOP VIEW Server Power Supplies RT 1 16 REG5 Industrial Power Conversion SYNC(HYST*) 2 15 IN SCOMP 3 14 V CC MAX5069 4 DT 13 NDRVA UVLO/EN 5 12 NDRVB FB 6 PGND 11 COMP 7 10 AGND FLTINT 8 9 CS TSSOP-EP *MAX5069B/C. Selector Guide appears at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.High-Frequency, Current-Mode PWM Controller with Accurate Oscillator and Dual FET Drivers ABSOLUTE MAXIMUM RATINGS IN to PGND ............................................................-0.3V to +30V AGND to PGND.....................................................-0.3V to +0.3V IN to AGND.............................................................-0.3V to +30V Continuous Power Dissipation (T = +70C) A V to PGND..........................................................-0.3V to +13V 16-Pin TSSOP-EP (derate 21.3mW/C above +70C)...1702mW CC V to AGND..........................................................-0.3V to +13V Operating Temperature Range..........................-40C to +125C CC FB, COMP, CS, HYST, SYNC, REG5 to AGND ........-0.3V to +6V Maximum Junction Temperature .....................................+150C UVLO/EN, RT, DT, SCOMP, FLTINT to AGND .........-0.3V to +6V Storage Temperature Range .............................-60C to +150C NDRVA, NDRVB to PGND..........................-0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C CC Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +12V for the MAX5069C/D, V = +23.6V for the MAX5069A/B at startup, then reduces to +12V, C = C = 0.1F, IN IN IN REG5 C = 1F, R = 100k , NDRV = floating, T = T to T , unless otherwise noted. Typical values are at T = +25C.) (Note 1) VCC RT A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS UNDERVOLTAGE LOCKOUT/STARTUP Bootstrap UVLO Wake-Up Level V V rising, MAX5069A/B 19.68 21.6 23.60 V SUVR IN Bootstrap UVLO Shutdown Level V V falling, MAX5069A/B 9.05 9.74 10.43 V SUVF IN UVLO/EN Wake-Up Threshold V UVLO/EN rising 1.205 1.230 1.255 V ULR2 UVLO/EN Shutdown Threshold V UVLO/EN falling 1.18 V ULF2 MAX5069B/C only, sinking 50mA, HYST FET On-Resistance R 10 D S ( ON) H V = 0V UVLO/EN HYST FET Leakage Current I V = 2V, V = 5V 3 nA LEAK H UVLO/EN HYST IN Supply Current In I V = +19V, V < V 47 90 A START IN UVLO/EN ULF2 Undervoltage Lockout IN Range V 10.8 24.0 V IN INTERNAL SUPPLIES (V and REG5) CC V Regulator Set Point V V = + 10.8V to +24 V, V sourci ng 1A to 25mA 7.0 10.5 V CC CCSP IN C C REG5 Output Voltage V I = 0 to 1mA 4.85 5.00 5.15 V REG5 REG5 REG5 Short-Circuit Current Limit I 18 mA REG5 SC f = 1.25MHz 7 SW IN Supply Current After Startup I V = +24V mA IN IN f = 100kHz 3 SW Shutdown Supply Current I 90 A VIN SD GATE DRIVER (NDRVA, NDRVB) Z NDRVA/NDRVB sinking 100mA 2 4 OUT(LOW) Driver Output Impedance Z NDRVA/NDRVB sourcing 25mA 3 6 OUT(HIGH) Sinking 1000 Driver Peak Output Current I mA NDRV Sourcing 650 PWM COMPARATOR Comparator Offset Voltage V V > V 1.30 1.60 2.00 V OS PWM COMP CS Comparator Propagation Delay t V = 0.1V 40 ns PD PWM CS Minimum On-Time t Includes t 110 ns ON(MIN) CS BLANK CURRENT-LIMIT COMPARATOR Current-Limit Trip Threshold V 298 314 330 mV CS 2 MAX5069