MAX5014 MAXIM [Maxim Integrated Products], MAX5014 Datasheet
MAX5014
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MAX5014 Summary of contents
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... The switching frequency is internally trimmed to 275kHz ±10%, thus reducing magnetics and filter com- ponent costs. The MAX5014/MAX5015 are available in 8-pin SO packages. An evaluation kit (MAX5015EVKIT) is also available. Warning: The MAX5014/MAX5015 are designed to operate with high voltages. Exercise caution. ...
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... falling 11V, (externally forced 11V, (externally forced 11V, externally forced NDRV sourcing 50mA V = 11V, externally forced NDRV sinking 50mA V V OPTO = SS_SHDN MAX5014 = +70° +25°C.) A MIN TYP MAX 0.85 1.3 1.4 2.6 11 0.9 1 1.9 2.7 190 290 110 ...
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... TEMPERATURE (°C) = +25°C.) A MIN TYP MAX 150 25 419 465 510 - 180 70 247 275 302 75 44 2.0 4.6 1.0 2.331 2.420 2.500 0.25 0.37 0.41 0.53 0.59 0.65 MAX5014 MAXIMUM DUTY CYCLE vs. TEMPERATURE 81 4V GND OPTO 80.9 80.8 80.7 80.6 80.5 80.4 -40 - TEMPERATURE (°C) UNITS °C ° µ kHz 6.5 µA ...
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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 ...
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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 ...
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... RMS currents through the MOSFET switch and in most cases a smaller output filter inductor. The major disad- vantage to this is that the MOSFET voltage rating must be higher and that slope compensation must be provid stabilize the inner current loop. The MAX5014 provides internal slope compensation. DD receives ...
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... 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 WINDING REGULATOR EN OUT 0.7V UVLO 6.6V 275kHz OSCILLATOR ...
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... Internal Regulators The internal regulators of the MAX5014/MAX5015 enable initial startup without a lossy startup resistor and regulate the voltage at the output of a tertiary (bias) winding to provide power for the IC. At startup V+ is ...
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... CC OPTO OPTOCOUPLER TLV431 Undervoltage Lockout (UVLO), Soft-Start, The soft-start feature of the MAX5014/MAX5015 allows the load voltage to ramp controlled manner, thus eliminating output voltage overshoot. While the part is in UVLO, the capacitor connected to the SS_SHDN pin is discharged. Upon coming out of UVLO an internal current source starts charging the capacitor to initiate the soft-start cycle ...
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... NDRV switches the external MOSFET off after the maxi- mum duty cycle has been reached, regardless of the feedback. The MAX5014 uses an internal ramp generator for slope compensation. The internal ramp signal is reset at the beginning of each cycle and slews at 26mV/µs. The PWM comparator uses the instantaneous current, ...
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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 ...
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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 ...
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... 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 Vishay-Siliconix Dale-Vishay IRC On Semi General Semiconductor ...
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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 ...