设置
快速交货
免运费
国际贸易术语
支付类型
市场产品
Slide 1
Slide 2
Slide 3
Slide 4
Slide 5
Slide 6
Slide 7
Slide 8
Slide 9
Slide 10
Slide 11
Slide 12
Slide 13
Slide 14
Slide 15
Slide 16
Slide 17
Slide 18
Slide 19
Slide 20
Slide 21
Slide 22
Slide 23
Slide 24
Slide 25
Slide 26
Slide 27
Slide 28
Slide 29
Slide 30
Slide 31
Slide 32
Slide 33
Slide 34
Slide 35
Slide 36
Product List
First, calculate the TON time from the equation shown in this slide. Use the maximum VIN value for the TON calculation. For these parameters, a TON time of 318ns is calculated. An equation for calculating the resistor for setting RTON can be found on the SC417 datasheet. For this example a value of 154.9kΩ is calculated. The closest 1% value of resistor is 154kΩ. To set the output voltage, use the previously presented feedback equation. From this, select 10kΩ for RFB2 and 11kΩ for RFB1. To calculate the ripple current, use the equation found on slide 16 which includes the terms D and T. For D, use VOUT/VIN max and for T, use 1/FSW. Ripple current is then calculated to be 3.9A peak-to-peak.
PTM Published on: 2011-09-27
