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noname

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  1. Thanks a lot. I knw sg3524 is for voltage mode control. Actually i would like to use average current mode control as my buck converter feedback control. But i hav no experience in doing electronic project, i think it is better to start familiar with the PWM first so my friend recomend me try to use this sg3524. What u means 'pins 12&13 tied to drain'?? What difference if i connect it to Vin? My converter specification: input: 10-15V output: 5V switching freqquency: 100kHz output ripple: 1% As u say bootstrap circuitry is onboard, can u please kindly suggest me which PWM it is?
  2. here is the test circuit i refer from the datasheet
  3. ya the RT & CT are not shorted, is my careless. thanks 4 ur remind. because i am using n channel mosfet then the emiter pin should go ir2117 input; if use p channel then is collector go the input pin right? is it correct nw?
  4. i am using sg3524 to do my buck converter. i use ir2117 to drive my high side power mosfet (irf540). can anyone help me to check my open loop test circuit. to obtain duty cycle more than 50% pin11 & 14 were shorted is it? how about pin12 & 13? thanks 4 ur help. ;)
  5. i am using sg3524 to do my buck converter. i use ir2117 to drive my high side power mosfet (irf540). can anyone help me to check my open loop test circuit. to obtain duty cycle more than 50% pin11 & 14 were shorted is it? how about pin12 & 13?
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