Output by the CS3843 and CS5101 composed of 5V 3.3V switching DC power supply circuit

The CS3843 and CS5101 are components of a 5V/3.3V switching DC power supply circuit. The CS3843 is a fixed frequency PWM controller characterized by a set oscillator that precisely controls the duty cycle. It features a temperature-compensated reference voltage, a high-gain error amplifier, a current sensing comparator, and a suitable driving power MOSFET for high current push-pull output. The CS5101 serves as a bipolar secondary stage regulator, achieving an accuracy of up to 1.0%. It operates with a gate drive voltage ranging from 8.0V to 75V and an operating voltage (Ucc) of 8.0V to 45V, with a peak output current of 1.5A. The precision of the compensated voltage reference and error amplifier chip is 2.0%.

The CS3843 PWM controller operates by generating a fixed frequency signal that modulates the duty cycle, allowing for efficient power conversion. The integrated temperature-compensated reference voltage ensures stable operation across varying temperatures, enhancing the reliability of the power supply. The high-gain error amplifier continuously monitors the output voltage, comparing it against the reference voltage, and adjusts the duty cycle accordingly to maintain a stable output. The current sensing comparator plays a crucial role in protecting the circuit from overcurrent conditions by monitoring the output current and providing feedback to the PWM controller.

In the secondary stage, the CS5101 regulates the output voltage with high precision, making it suitable for sensitive electronic applications. The versatility of the gate drive voltage allows for compatibility with various power MOSFETs, while the specified operating voltage range provides flexibility in design. The peak output current capability of 1.5A supports applications requiring higher current loads, ensuring that the power supply can meet demanding performance criteria. The overall design of this power supply circuit emphasizes efficiency, reliability, and precision, making it ideal for modern electronic devices that require stable power sources. CS3843 and CS5101 constituted by the output of 5V/3.3V switching DC power supply circuit as shown in FIG. CS3843 is a fixed frequency PWM controller. The IC is characterized by a set-oscillator, used to precisely control the duty cycle, there is a temperature-compensated reference voltage, a high-gain error amplifier, current sensing comparator and a suitable driving power tube MOSFE high current push-pull output. CS5101 is a bipolar secondary side of the final stage of the regulator, the regulator accuracy up to 1.0%, the gate drive voltage of 8.0 ~ 75V, operating voltage (Ucc) is 8.0 ~ 45V, has a peak output current of 1.5A.

There is a precision of 2.0% over the compensated precision voltage reference and error amplifier chip.