iw1688 transformer selection
Post on 19-Jan-2022
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Transformer Selection for iW1688 Solution
Transformer Selection for iW1688 Solution
iWATT China Applications & Supports
2
VOUT (V)
NsNp
1. Confirm the transformer turns ratio
从横坐标找出所要设计电源的输出电压(VOUT),就可以依据红色曲线查到变压器的匝比(NP/NS)。
Read :20.2Read :20.2
Example :Example :The output voltage is 5V.The output voltage is 5V.
3
2. Confirm primary winding turns
Ae(mm2)
NP(Turns)
根据所用的磁芯的Ae,就可以依据红色曲线查到变压器初级的匝数(NP)。
Read : 214 TurnsRead : 214 Turns
Example :Example :A EE16 core, its A EE16 core, its AeAe is 18.5mmis 18.5mm22
4
3. Confirm the primary inductance
OPP(W)
LM (mH)
根据电源的最大功率点(OPP),就可以依据红色曲线查到变压器初级电感量(LM)。
Read : 2.4 Read : 2.4 mHmH
Example :Example :A Adapter with 5W output, its A Adapter with 5W output, its OPP will set at 130% or 6.5WOPP will set at 130% or 6.5W
5
4. Input voltage protecting according to RIN
RIN(Ω)
VIN(VDC)
Input Over-Voltage Protection (OV) - DCV
Input Under-voltage Protection (UV) - DCV
Example :Example :The total RThe total RININ is set to 6Mis set to 6MΩΩ..
Read: The UV is 70VDCRead: The UV is 70VDC
Read: The UV is 443VDCRead: The UV is 443VDC
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