TC4421VPA

Logic Voltage - VIL, VIH:	0.8V, 2.4V
Base Part Number:	TC4421
Supplier Device Package:	8-PDIP
Package / Case:	8-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 150°C (TJ)
Rise / Fall Time (Typ):	60ns, 60ns
Input Type:	Inverting
Current - Peak Output (Source, Sink):	9A, 9A
Series:	--
Voltage - Supply:	4.5 V ~ 18 V
Gate Type:	IGBT, N-Channel, P-Channel MOSFET
Number of Drivers:	1
Channel Type:	Single
Driven Configuration:	Low-Side
Part Status:	Active
Packaging:	Tube

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TC4421VPA is an integrated power supply circuit, which belongs to the PMIC (Power Management ICs) series of gate transistor driver chips. This type of integrated circuit can be widely used in DC/DC converters which are used to produce a variety of different voltages from a single DC power source. It has the advantages of fast switching speed, low power consumption and low voltage overshoot.The TC4421VPA is a dual-channel gate driver chip with two channels. Each channel consists of an independent single-ended open drain Darlington output stage and a low impedance invertor level translation stage. The Darlington output stage uses a combined power transistor as the output device, which is suitable for high power applications. This combined output transistor amplifies the input current enough to drive the output transistor, achieving an output current of 4A. The low impedance invertor stage uses a low impedance P-MOSFET transistor to control the output of the external power transistor, which helps to reduce the power consumption of the input signal and reduce the level shift of the output voltage.The TC4421VPA also has a built-in under-voltage lockout (UVLO) circuit to protect itself from accidental overloads and transients. It also includes a built-in thermal protection circuit to protect it from overheating. The device can also be set to shutdown mode, if necessary.The TC4421VPA is suitable for use in a wide range of applications, such as AC/DC power converters, switch-mode power supplies, motor drivers, and lighting control systems. It can also be used in audio/video electronics, telecommunications/networking systems, automotive electronics, as well as a variety of other industrial and consumer electronics.The working principle of the TC4421VPA is relatively simple. It uses the input signal to control the output power transistor, which in turn controls the output voltage. The input signal can be either a low voltage digital signal or a higher voltage PWM signal. When the input signal is a low voltage digital signal, it causes the output power transistor to transition from non-conducting mode to conducting mode. The transition causes the output voltage to increase as the current is supplied to the load. On the other hand, when the input signal is a higher voltage PWM signal, it causes the output power transistor to transition from conducting mode to non-conducting mode. The transition causes the output voltage to decrease as the current is diverted away from the load.In summary, the TC4421VPA is a dual-channel, integrated power supply circuit which is suitable for high power applications. It has the advantages of fast switching speed, low power consumption, low voltage overshoot and built-in protection circuits. This makes it ideal for a wide range of applications.

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