CGCAP20162

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CGCAP20162 is an integrated chip that gathers power, non-isolated AC/DC/DC digital control switch series necessary for power conversion. It is widely used in the fields of communication, office automation, consumer electronics, smart home, power supply, industrial control, etc. This paper will discuss the application field and working principle of CGCAP20162.

The CGCAP20162 integrates a switching regulator, a high-frequency PWM modulation, a motor driver, a linear voltage regulator and a current detection comparator. It supports a wide range of input voltages from 1.7V to 24V, which is suitable for various kinds of applications. In addition, it is equipped with low-noise and low-ripple-carrier frequency control, and integrates intelligent functions such as current mode control, voltage mode control, synchronous rectification, etc. Based on these features, CGCAP20162 can provide power solutions for office automation, consumer electronics, communications and industrial control fields.

CGCAP20162 is a non-isolated AC/DC/DC digital control switch, but also a multifunction control switching regulator. It has a functional network, which can controll output current, temperature, voltage and fan speed. Besides, multiple protections can be implemented, which can effectively protect the output devices from over-voltage monitoring, over-temperature monitoring, over-current monitoring, short-circuit protection and other special protections.

Furthermore, the working principle of CGCAP20162 is mainly based on the pulse width modulation (PWM) method. The basic working mode is that the integrated circuit receives the input signal from the outside chip, and the built-in closed-loop-control unit compares the input signal with the command voltage, and then converts the comparison result into a duty cycle signal. This pulse width modulated signal will drive the switching element 2. At the same time, the feedback signal is sent back to the closed-loop-control unit to complete a simple cycle.

The output voltage of CGCAP20162 is determined by the duty cycle of the PWM signal. When the duty cycle is 0%, the output current is 0, and the output voltage is equal to the input voltage. When the duty cycle is 100%, the output voltage is equal to the differentials pressure (output voltage of VD plus the forward voltage of the switching element). The output current is controlled by comparing the input voltage with the feedback voltage and regulating the duty cycle.

In addition, the CGCAP20162 is also able to support synchronous rectification and efficiency improvement. The synchronous rectification technique is based on the shorting of the switch element, that is, when the switching element is on (active), it is connected to the output, and when it is off (inactive), it is connected to the low-resistance path, so as to achieve the effect of rectifying the current.

To sum up, CGCAP20162 is an integrated chip that integrates power, non-isolated AC/DC/DC digital control switch series necessary for power conversion. It supports a wide range of input voltages, integrates various protection measures and is capable of supporting synchronous rectification and efficiency improvement. Its working principle is based on pulse width modulation, and the output voltage is determined by the duty cycle of the PWM signal. Therefore, CGCAP20162 are most widely used in the fields of communication, office automation, consumer electronics, smart home, power supply, industrial control, etc.

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