TOP223系列开关电源工作原理（国外英文资料）.doc

TOP223系列开关电源工作原理（国外英文资料） Single chip TOP223 series switching power supply principle - - ┊ home page directory ┊ technology abstract ┊ experiment ┊ practical ┊ site production ┊ speed slow down here Single chip TOP223 series of switching power supply works Tudor was in 4-1 10:52:21 Latest edition: 40W digital amplifier - D type theory and production data download (2007.12.26 update) Voltage control-switch power supply full bridge drive PM4040FPDF technology data download (2007.07.17 update) design 220V - 380V to 300W - 5KW switching power supply is simpler and more convenient. The PM4040F utility circuit downloads 2007.07.10 (1) control the source of voltage Control voltage Vc to shunt regulator and the gate driver stage provides the bias voltage, can adjust and control the current Ic  is duty ratio. Theres a 47 out of the c-s pole Mu F by-pass capacitance, which provides current for the door driver level. The total capacity of the control is indicated by the CT, which determines the timing of the automatic restart and the compensation of the loop circuit. The Vc has two modes of work, one is the lag adjustment, which is used to initiate and overload the two cases, and has the delay control effect. The other is a parallel adjustment, which is used to separate error signals from the high voltage current source that controls the circuit. The power source Ic is provided by the high voltage current source between the d-c pole at the beginning of the circuit, so that the control circuit is powered and the CT is charged. (2) the gap reference voltage source Band gap voltage reference source except to provide various internal reference voltage, also produce a temperature compensated and adjustable current source, to ensure the accurate setting oscillator frequency and gate drive current. (3) oscillator Internal oscillation capacitance is set in the upper and lower threshold the VH and VL  periodically between linear charge, discharge, to produce a pulse width modulator ne