max5020csat Maxim Integrated Products, Inc., max5020csat Datasheet
max5020csat
Related parts for max5020csat
max5020csat Summary of contents
Page 1
Rev 0; 7/01 Current-Mode PWM Controllers with Integrated General Description The MAX5019/MAX5020 integrate all the building blocks necessary for implementing DC-DC fixed-fre- quency power supplies. Either primary- or secondary- side regulation may be used to implement isolated or nonisolated ...
Page 2
Current-Mode PWM Controllers with Integrated Startup Circuit ABSOLUTE MAXIMUM RATINGS V+ to GND ……………………………………...……-0.3V to +120V V to GND.………………………………….……….-0.3V to +40V GND.………………….……………………-0.3V to +12.5V CC FB, NDRV, SS_SHDN GND .……-0. and V ...
Page 3
Current-Mode PWM Controllers with Integrated ELECTRICAL CHARACTERISTICS (continued 13V, a 10µF capacitor connects open circuit 3V -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL ...
Page 4
Current-Mode PWM Controllers with Integrated Startup Circuit (V+ = 48V 13V GND, NRDV is open circuit MAX5020 MAXIMUM DUTY CYCLE vs. TEMPERATURE 48.0 47 GND 47.6 47.4 47.2 47.0 46.8 -40 -20 ...
Page 5
Current-Mode PWM Controllers with Integrated (V+ = 48V 13V GND, NRDV is open circuit NDRV FREQUENCY vs 271.0 270.5 270.0 269.5 269.0 268 GND 268.0 267.5 267 ...
Page 6
Current-Mode PWM Controllers with Integrated Startup Circuit PIN NAME High-Voltage Startup Input. Connect directly to an input voltage between 18V to 110V. Connects 1 V+ internally to a high-voltage linear regulator that generates the Input of the ...
Page 7
Current-Mode PWM Controllers with Integrated HIGH- VOLTAGE GND REGULATOR EN MAX5019 ONLY SLOPE COMPENSATION 26mV/µs 26mV/µs 1MΩ 50kΩ FB ERROR AMP SS_SHDN 2.4V 0.25V Figure 1. Functional Diagram _______________________________________________________________________________________ IN BIAS WINDING REGULATOR EN OUT OUT ...
Page 8
Current-Mode PWM Controllers with Integrated Startup Circuit V IN (36V TO 72V 4.7µ 10µ 0.1µF Figure 2. Forward Converter vantage to this is that the MOSFET voltage rating must be higher and that slope ...
Page 9
Current-Mode PWM Controllers with Integrated V IN Figure 3. Nonisolated Flyback Converter Figure 4. Isolated Flyback Converter to 2.4V, the internal voltage reference. Pull V below 0.25V to disable the controller. Undervoltage lockout shuts ...
Page 10
Current-Mode PWM Controllers with Integrated Startup Circuit pass filter (Figures 2, 3). Select the current-sense resis- tor, R according to the following equation: SENSE = 0 465 SENSE LimPrimary where I is the maximum peak ...
Page 11
Current-Mode PWM Controllers with Integrated 1) 36V ≤ V ≤ 72V 5V OUT OUT 50mV 2) To set the output voltage calculate the values of resistors R1 and R2 according to the following equation: ...
Page 12
Current-Mode PWM Controllers with Integrated Startup Circuit 14 ≥ × DSMAX 14 Choose MOSFETs with appropriate avalanche power ratings. 5) Choose the tertiary winding turns ratio (N that the minimum input ...
Page 13
Current-Mode PWM Controllers with Integrated Table 1. Component Manufacturers Power FETS Current-Sense Resistors Diodes Capacitors Magnetics Selector Guide MAXIMUM PART DUTY CYCLE MAX5019CSA 85% MAX5019ESA 85% MAX5020CSA 50% MAX5020ESA 50% ______________________________________________________________________________________ International Rectifier Fairchild Vishay-Siliconix Dale-Vishay IRC On Semi General ...
Page 14
Current-Mode PWM Controllers with Integrated Startup Circuit Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and ...