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TCL2129彩电采用三洋单片机心(LA7685),其开关电源电路如图1所示。属于它激式并联型开关电源。该电源采用 TDA4601集成电路(IC801),输出+112V、+18V、+8V 三组直流电压,其交流电输入适应范围为 AC165～250V。采用此电源电路的彩电还有:TCL2021、TCL9621、TCL2128、TCL9641等机型。1.电路启动及工作过程AC220V 电压经低通滤波和桥式整流,在 C808上产生约300V 直流电压,同时,AC 电压经 R802、
TCL2129 color TV using Sanyo single-chip heart (LA7685), the switching power supply circuit shown in Figure 1. It belongs to its exciting parallel switching power supply. The power supply using TDA4601 integrated circuit (IC801), output +12 V, +18 V, +8 V three sets of DC voltage, the AC input to adapt to the range of AC165 ~ 250V. Using this power supply circuit TV also: TCL2021, TCL9621, TCL2128, TCL9641 and other models. 1. Circuit start and work process AC220V voltage low-pass filter and bridge rectifier, the C808 to produce about 300V DC voltage at the same time, AC voltage by R802,