modified 1 week ago

Negative Voltage Generator - Dual Pump

00:38:34

Although ICL7660 IC can ganerate negative voltage
But, it only supplys small power,current (Recommand < 25mA)

This dual charge pump circuit supplys huge power, current
Dual charge pump has low ripple (Max load : 2 ~ 5mV)

Input Power : DC 15V @ 500mA (Max load average : 500mA, Start circiut : 3A)
Output Power : DC -9V @ Max 200mA (No load : -9.3V, Max load : -8.8V)

Charge Pump Transistor : 2SD882 x6

Signal Inverter 
| - Transistor : 2SC1815
| - Rectifier Diode : 1N4004 x3

Negative Rectifier Diode : 1N4004 x2

Output Voltage Regulator 
| - Transistor : BD231
| - Zener Diode : 1N4740

published 1 week ago

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