CHL8112A-01CRT

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CHL8112A-01CRT is a low-cost monolithic integrated DC-DC buck switching controller that features low component count, low ripple, and low operating temperature. The device operates up to 500kHz switching frequency and has a wide input voltage range of 4.5V to 24V.

The CHL8112A-01CRT is designed to concurrently provide maximum efficiency and superior transient response, making it ideal for both low-cost and high-performance applications. The OVLO and UVLO thresholds are factory-programmed to provide maximum accuracy. This controller provides a constant frequency, current-mode eC the digital PWM control with fixed 128-clock cycle dead-time (1 clock cycle = 0.8uS).

The CHL8112A-01CRT is housed in a SOP-8 package, which offers both performance and affordability. The device is also equipped with a hardware shutdown mode feature and complete under-voltage lockout protection, making it suitable for any type of power supply application. In addition, the CHL8112A-01CRT features an external soft-start mode, which can be used to regulate the voltage during startup. The controller also provides a slew-rate control pin and an on-off control pin, allowing for easy control and configuration. The operating temperature range of the CHL8112A-01CRT is -40°C to 85°C.

The CHL8112A-01CRT is commonly used in high-end, high-density wall-mounted and mobile communication power supplies. The device is also suitable for notebook computer and gaming console power supplies and also for industrial, medical, automotive, battery-operated and personal electronics applications. This device is designed for both isolated and non-isolated applications.

The working principle of the CHL8112A-01CRT is based on the DC-DC buck converter topology. The device utilizes a synchronous rectifier MOSFET to switch the conduction of the power flow from the input voltage to the output voltage. During the on-time, the buck switch is enabled, and energy is transferred from the input voltage source to the output voltage load. During the off-time, the buck switch is disabled and the MOSFET is turned off, so no energy is allowed to be transferred.

The current-mode, high-frequency switching technology inside the CHL8112A-01CRT allows for high power efficiency and low output voltage ripple. The device utilizes an external sense resistor to sense the inductor current and compare it with an internal reference voltage. The error amplifier then adjusts the turn-on time of the switch to maintain the desired output voltage. This ensures a high power efficiency and a low output voltage ripple.

In conclusion, the CHL8112A-01CRT DC-DC buck switching controller is a low-cost and high-performance solution for various power supply applications. The device features wide input voltage range, low ripple and low operating temperature. It provides maximum efficiency and superior transient response and comes with a slew-rate control pin, on/off control pin, hardware shutdown mode and external soft-start mode features, making it suitable for any type of power supply application. Additionally, the CHL8112A-01CRT offers affordable and reliable performance.

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