DER-41

5V and 22V LCD TV Standby PS

November 18, 2004

4 Schematic

Figure 2 – Schematic

Note: R9 is placed on the topside of the PCB and soldered in series with R6.

L1, L2, R13, R14, C1 and C2 form an EMI filter. C1 and C2 form the bulk capacitance.

In the actual system, the standby supply can be connected to the EMI filter and bulk

capacitor of the main power supply; it may be possible to simplify the input circuit to take

advantage of the main power supply filter and bulk capacitor. If the main PSU bulk

capacitor is far from the standby supply, other configurations of simplified filtering may be

possible for optimal noise and cost performance.

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