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stspin32g4 buck converter for Vbat 15V (4s)

frankers
Associate II

hello comunity,

i want design a motor controller with the stspin32g4.

i have a question about the build in buck converter:

i want use the stspin32g4 just with a 4s battery ca 15V and a 2 wire control ifc (servo pwm + ground).

I want the stspin32g4 generate the power Vdd and Scref for the internal gate drivers with the internal buck converter.

some body told me I not need the diode D1 and also not need the inductor 18uH what we see in the datasheet. because the used Vcc = 15V is so low. is this true? or should I add the diode and 18uH inductor? similar what we see in datasheet Figure 9 : 3.3 V LDO regulator supplied through VCC

 

maybe some body can explain it. or even can add a pdf or picture with the circuit for stspin32g4 power management.

thank you 

Frank

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