Alberto Dan
Junior Member level 3
Hy,cand someoane explain me what is the role of transistor Q1 and how that circuits work?I try to understand but i can't.Voltage VS is the power supply of a Internal Charge pump of IC.
Out "CP"is out Charge pump who is a Periodic waveform.From datasheet if VBAT is grater than 13.5V then "Vcp" is "VS+11V".If VBAT is grater than 22V then Charge pump is close and "Vcp=0V".
Now i cand understand what is happened there,and what is the role of Q1 transistor,because is a N tipe and the base is connected at the GND throught that resistor,so basicaly don t do anithing,is in BLOCK state.
The Vcp voltage feet the Grill of NFET transistor.From my opinion i understand that,if Vcp is HY than VP=VBAT,and if Vcp is low VP=0V.
I don t understand here what is the role of charge pump,who influences the gate of exernal MOSFET driver,and what is the role of there TBJ,and zenner diode.
Can somebody explain me please??
See atachament for picture!
Out "CP"is out Charge pump who is a Periodic waveform.From datasheet if VBAT is grater than 13.5V then "Vcp" is "VS+11V".If VBAT is grater than 22V then Charge pump is close and "Vcp=0V".
Now i cand understand what is happened there,and what is the role of Q1 transistor,because is a N tipe and the base is connected at the GND throught that resistor,so basicaly don t do anithing,is in BLOCK state.
The Vcp voltage feet the Grill of NFET transistor.From my opinion i understand that,if Vcp is HY than VP=VBAT,and if Vcp is low VP=0V.
I don t understand here what is the role of charge pump,who influences the gate of exernal MOSFET driver,and what is the role of there TBJ,and zenner diode.
Can somebody explain me please??
See atachament for picture!