max5015esat Maxim Integrated Products, Inc., max5015esat Datasheet
max5015esat
Related parts for max5015esat
max5015esat Summary of contents
Page 1
Rev 0; 7/01 Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies General Description The MAX5014/MAX5015 integrate all the building blocks necessary for implementing DC-DC fixed-fre- quency isolated power supplies. These devices are current-mode controllers with an ...
Page 2
Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies ABSOLUTE MAXIMUM RATINGS V+ to GND ……………………………………...……-0.3V to +120V V to GND.………………………………….……….-0.3V to +40V GND.………………….……………………-0.3V to +12.5V CC OPTO, NDRV, SS_SHDN GND .……-0.3V to ...
Page 3
Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies ELECTRICAL CHARACTERISTICS (continued 13V, a 10µF capacitor connects V DD cuit, OPTO = GND -40°C to +85°C, unless otherwise noted. Typical values are at T ...
Page 4
Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies (V+ = 48V 13V, NRDV is open circuit MAX5015 MAXIMUM DUTY CYCLE vs. TEMPERATURE 48 GND OPTO 47.6 47.4 ...
Page 5
Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies (V+ = 48V 13V, NRDV is open circuit NDRV FREQUENCY vs 271.0 270.5 270.0 269.5 269.0 268 4V GND ...
Page 6
Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies 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 ...
Page 7
Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies HIGH- VOLTAGE GND REGULATOR EN OUT MAX5014 ONLY SLOPE COMPENSATION 26mV/µs 26mV/µs ∑ PWM OPTO SS_SHDN 2.4V 0.4V Figure 1. Functional Diagram _______________________________________________________________________________________ IN BIAS ...
Page 8
Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies 1N4148 (36V TO 72V 47µF MAX5015 SS_SHDN C SS 0.1µF Figure 2. Forward Converter Optocoupled Feedback Isolated voltage feedback is ...
Page 9
Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies MAX5014 SS_SHDN C SS Figure 3. Flyback Converter To reduce power dissipation the high-voltage regulator is disabled when the V voltage reaches 12.7V. ...
Page 10
Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies ms = × startup nF where C is the soft-start capacitor as shown in Figure 2. SS Operation begins when V SS_SHDN When soft-start ...
Page 11
Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies V R REF OUT 1 where V is the reference voltage of the shunt REF regulator, and R and R are the resistors ...
Page 12
Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies ing equation to calculate the tertiary winding turns ratio DDMIN × ≤ IN_MIN + DDMAX × N ...
Page 13
Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies Table 1. Component Manufacturers Power FETS Current-Sense Resistors Diodes Capacitors Magnetics Selector Guide MAXIMUM PART DUTY CYCLE MAX5014CSA 85% MAX5014ESA 85% MAX5015CSA 50% MAX5015ESA 50% ______________________________________________________________________________________ International Rectifier Fairchild ...
Page 14
Current-Mode PWM Controllers with Integrated Startup Circuit for Isolated Power Supplies 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 ...