TI’s UC3845 is a Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, 0C to 70C. Find parameters, ordering and quality information

TI 的 UC3845 是一款 具有 8.4V/7.6V UVLO 和 50% 占空比、温度范围为 0°C 至 70°C 的单端 500KHz 电流模式 PWM 控制器。 查找参数、订购和质量信息.

The UC3844B, UC3845B series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and dc−dc converter applications offering the designer a cost−effective solution with minimal external components.

The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5mA, oscillator discharge is trimmed to

下载UC3845B中文资料、引脚图、Datasheet数据手册，有AC-DC控制器和稳压器详细引脚图及功能的应用电路图电压和使用方法及教程。

Primary-side current sense pin. Connect to current sensing resistor. The PWM uses this signal to terminate the OUTPUT switch conduction. A voltage ramp can be applied to this pin to run the device with a voltage-mode control configuration. OUTPUT is the …

5 GROUND This pin is the combined control circuitry and power ground. 6 OUTPUT This output directly drives the gate of a power MOSFET. Peak currents up to 1A are sourced and sunk by this pin. 7VCC This pin is the positive supply of the control IC. 8Vref This is the reference output. It provides charging current for capacitor CT through resistor RT.

UC3845 is a high-performance fixed-frequency current-mode controller designed for offline and DC-to-DC converter applications, providing designers with a cost-effective solution that requires minimal external components. This article mainly introduces circuit, pinout, datasheet and other detailed information about ON Semiconductor UC3845.

NORMALLY 8DIP/8SOP PIN NO. ( ) IS 14SOP PINNO. The UC3842/UC3843/UC3844/UC3845 are fixed frequencycurrent-mode PWM controller. They are specially designed for Off-Line and DC to DC converter applications with minimum external components.

2021年5月24日 · This is uc3845 IC which use for control PWM in power supply. I see this set up on datasheet for testing and I want to set up this on breadboard for better understanding how this IC work, but I don’t know VREF voltage.