GW Instek SPS Series - Manual (Page 10)

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4. THEORY OF OPERATION (See Figure 4-1)
z Block Configuration of SPS- System
The SPS-Series comprise a Bridge rectifier, a Pulse Width Modulation, a Driver Circuit, a Driver Transformer,
a Rectifier Circuit, a Voltage Control Circuit, a Current Shunt, an Output Filter, a Voltage/Current Adjusting
Circuit, a Buffer Circuit, an Error Amplifier, an Opto-Isolator, and an Auxiliary Switching Supply and etc.
z Component List for each circuit configuration
Bridge Rectifier: BD101.
Pulse Width Modulation: U102.
Driver Circuit: T104, Q105~Q108.
Driver Transformer: T301.
Rectifier Circuit: D301,D3011.
Voltage Control Circuit: Q303.
Current Shunt: R341.
Output Filter: Common Choke L302, C325.
Voltage/Current Adjusting Circuit: U302.
Buffer Circuit: U302, Q301.
Error Amplifier: U301, U303.
Opto-isolator: U304.
Auxiliary Switching Supply: U201, U202, T201.
OVP: U401, U402
Remote Control: RL401, D402