V35PWM12HM3/I Discrete Semiconductor Products

The V35PWM12HM3/I is a single-phase, low-frequency voltage-controlled switching mode power supply (SMPS) rectifier from ROHM Semiconductor. This device features a wide input voltage range of 85 V to 265 V, a fast switching frequency of up to 1 MHz and a wide operating temperature range of -40°C to +105°C. The V35PWM12HM3/I is designed to meet safety agency requirements such as CE, UL, and VDE.

The V35PWM12HM3/I devices are widely used in a variety of applications, such as notebook computers, LED lighting and motor drives. They are also used in consumer audio and video applications, such as audio power amplifiers, portable electronics, digital cameras and camcorders. The V35PWM12HM3/I devices are also suitable for power conversion from high power alternating current (AC) sources, such as solar energy or grid-scale power.

The V35PWM12HM3/I devices are based on a single-phase, full-bridge, zero-voltage switching (ZVS) topology. This topology is similar to the ZVS buck type converter, but uses two transistors instead of one. The two transistors act as floating switches and allow for independent control of the output waveform. This configuration increases efficiency in high-frequency applications by reducing switching losses.

The power conversion process in the V35PWM12HM3/I device involves an input voltage and the current waveform of the inductor connected to the output voltage. The voltage supplied to the device is converted by the switching of the transistors to form an output voltage waveform. The waveform is determined by the duty cycle of the transistor switching, and can be adjusted by adjusting the gate-to-source voltage of the transistor. The duty cycle of the transistor switching is controlled by an external voltage, typically 5V.

The V35PWM12HM3/I device also includes additional features for improved efficiency and system integration, such as over-voltage protection, over-current protection, thermal protection and a reset function. In addition, the device features a low standby power consumption, a low start-up current, a wide operating voltage range and a low output ripple.

The V35PWM12HM3/I offers high performance and reliable operation for a range of power conversion applications, making it an ideal choice for designers looking for a cost-effective and efficient solution.