LM2576 Step-Down Voltage Regulator
Pin Configuration
Pin Number
Pin Name
Description
1
VIN
Power Electronics
1N4734A - 5.6V Zener Diode
Pin Configuration
Pin No.
Pin Name
Description
1
Anode
UC3843 - PWM Controller IC (8-Pin)
Note: This IC also comes in 14-Pin, 16-Pin and 20-Pin packages. This article covers only on the 8-Pin version of the IC.
Pin Configuration
Pin Number
PCR406 Sensitive Gate Thyristor
Features and Specifications
Blocking voltage to 600 V
High performance planner diffused PNPN devices
On-state RMS current is 0.8 A
Repetitive peak off-state voltage is 400 V
Ultra-low gate triggering gate current: 200uA
LM7905 Voltage Regulator
Pin Description
Pin Number
Pin Name
Description
1
Ground (Gnd)
18650 Lithium Ion Battery
18650 Cell Features and Technical Specifications
Nominal Voltage: 3.6V
Nominal Capacity: 2,850 mAh
Minimum Discharge Voltage: 3V
Maximum Discharge current: 1C
Charging Voltage: 4.2V (maximum)
Charging current: 0.5C
1N4148 Diode
1N4148 Pin Configuration
LM7912 Negative Voltage Regulator
Pin Configuration
Pin Number
Pin Name
Description
1
Ground (Gnd)
2N3904 - NPN Transistor
2N3904 Pin Configuration:
Pin Number
Pin Name
Description
1
Emitter
