TL3843DRG4-8

TL3843DRG4-8 is a pulse width modulation switch controller manufactured by Texas Instruments. The integrated circuit belongs to the PMIC – Voltage Regulators – DC DC Switching Controllers category, and its purpose is to control the output of a switched mode power supply using pulse width modulation (PWM) technology. This device is designed for use in applications such as desktop computers, laptop computers, chargers, AC to DC converters, batteries, SMPS (switched mode power supply) and other high power devices.

The TL3843DRG4-8 features an adjustable operating frequency range of between 1kHz to 100kHz and a programmable PWM ramping frequency range of between 50kHz to 500kHz. It is also capable of controlling the output voltage of a power supply between 0.85V and 5V and can achieve a full-load efficiency of up to 98%. The device has an input voltage range of between 3V and 32V and can support load currents up to 1A.

The TL3843DRG4-8 is operated in an open-loop control mode, where it measures the output voltage of the power supply using an integrated voltage/current sensing circuitry. The device then implements a Pulse Width Modulation technique to adjust the duty cycle of its output to maintain the output voltage at its desired level. This is accomplished by adjusting the duty cycle of the output pulses, which is generated by the built-in oscillator.

The device also features the ability to detect overload and over-temperature conditions and will automatically shut down the power supply to prevent damage. Additionally, the user has the ability to adjust the operating parameters of the device via an integrated onboard potentiometer, and the integrated pulse generator has adjustable pulse width and slope compensation.

The TL3843DRG4-8 is well suited for applications requiring efficient, reliable and cost-effective control of switched mode power supplies. Its wide-range input voltage, adjustable frequency range and built-in protections make it ideal for use in a variety of high power applications such as desktop computers, laptop computers, chargers, AC to DC converters, batteries and SMPS.