STMicroelectronics

Description

DESCRIPTION. The SG3525A series of pulse width modulator inte- grated circuits are designed to offer improved per- formance and lowered external parts count when used in designing all types of switching power sup- plies. The on- chip + 5.1 V reference is trimmed to . 1 % and the input common-mode range of the error. The SG3525A pulse width modulator control circuit offers improved performance and lower external parts count when implemented for controlling all types of switching power supplies. The on chip +5.1 V reference is trimmed to 1% and the error amplifier has an input common mode voltage range that includes the. Feb 16, 2009 The duty cycle is set by a voltage mode PWM regulator ( SG3525 ) to keep a constant output. DC bus voltage. This voltage is then converted into AC using a standard H-bridge converter implemented with four ultrafast switching IGBTs in PowerMESH technology, switching at. 16 kHz. The switching strategy B. Drive the SG1525A SYNC terminal (pin 3) with the external clock. Input impedance is 2 k . The clock amplitude should be greater than 2 V and less than 5 V. Pulse width should be at least 300 ns. For reliable triggering, but it should not exceed the free-running oscillator clock pulse width by more than 200 ns. 2. 2017 8 14 SG3525 . +5.1V 1% .