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MAX5974BETE Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX5974BETE Datasheet(HTML) 11 Page - Maxim Integrated Products |
11 / 27 page Active-Clamped, Spread-Spectrum, Current-Mode PWM Controllers 11 Pin Configuration Pin Description 15 16 14 13 5 6 7 8 1 3 EN 4 12 10 9 DCLMP SS CSSC GND FB COMP EP MAX5974A MAX5974B MAX5974C MAX5974D 2 11 IN THIN QFN TOP VIEW + PIN NAME FUNCTION 1 DT Dead-Time Programming Resistor Connection. Connect resistor RDT from DT to GND to set the desired dead time between the NDRV and AUXDRV signals. See the Dead Time section to calculate the resistor value for a particular dead time. 2 DITHER/ SYNC Frequency Dithering Programming or Synchronization Connection. For spread-spectrum frequency operation, connect a capacitor from DITHER to GND and a resistor from DITHER to RT. To synchronize the internal oscillator to the externally applied frequency, connect DITHER/SYNC to the synchronization pulse. 3 RT Switching Frequency Programming Resistor Connection. Connect resistor RRT from RT to GND to set the PWM switching frequency. See the Oscillator/Switching Frequency section to calculate the resistor value for the desired oscillator frequency. 4 FFB Frequency Foldback Threshold Programming Input. Connect a resistor from FFB to GND to set the output average current threshold below which the converter folds back the switching frequency to 1/2 of its original value. Connect to GND to disable frequency foldback. 5 COMP Transconductance Amplifier Output and PWM Comparator Input. COMP is level shifted down and connected to the inverting input of the PWM comparator. |
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