CAT3626HV4-T2 Integrated Circuits (ICs)

The CAT3626HV4-T2 is a high-efficiency switching regulator in the form of a Power Management Integrated Circuit (PMIC). It is classified as a LED driver with its primary application field in the backlight control for small and medium displays, such as mobile phones, portable products, notebooks and LCD/PDP/OLED displays.

The CAT3626HV4-T2 operates with a constant frequency switch mode. This regulator supports both single and dual LED configuration. It allows LED dimming functions with internal or external Pulse Width Modulation (PWM) signals. An internal soft start and output over-voltage protection are also integrated.

The CAT3626HV4-T2 allows a high level of flexibility in the choice of external components. The voltage range of the LDOs can be selected via external resistors. Its power source can be either a Li-Ion/Li-Pol battery or a DC adapter.

The CAT3626HV4-T2 is designed to simplify system-level development and ensure low standby current consumption, efficient operation and high regulatory accuracy. Its wide operating range and high efficiency make it ideal for small-size applications.

Let\'s take a closer look at the working principle of the CAT3626HV4-T2. The device includes an internal oscillator with an internal frequency accuracy of ±2%. This oscillator produces a triangular waveform. The waveform is sent to both the low-side and high-side power FETs, allowing for both the switching of the power FETs and the setting of the PWM duty cycle.

The triangular waveform is also sent to an error amplifier that controls the output voltage. The error amplifier compares the output voltage to a reference voltage and generates a feedback voltage according to the difference between these two voltages. The feedback voltage is then used to adjust the output voltage, ensuring that it remains constant.

The CAT3626HV4-T2 is then able to provide a regulated output voltage. The output voltage is resiliently provided with a frequency of 2MHz and a maximum efficiency of 93%. This ensures that the output voltage is accurately regulated and that the load is well supplied at all times.

In summary, the CAT3626HV4-T2 is a high-efficiency, feature-rich power management IC used in LED driver applications. With its efficient operation and wide operating range, it is suitable for small-size applications. The device allows for LED dimming functions with internal or external PWM signals, and has an integrated soft start and output over-voltage protection. Its working principle is based on a constant frequency switch mode that ensures a regulated output voltage from the device.