TC4469EJD

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The TC4469EJD is a dual full-bridge gate driver designed to drive and control various types of power MOSFETs and IGBTs in the application field of power management IC (PMIC). In many switching power-supply designs, the TC4469EJD gate drivers offer excellent gate drive characteristics, high dv/dt immunity, and a wide operating situation range from 4.5V to 18V.

Application Field of TC4469EJD

TC4469EJD is a dual full-bridge gate driver integrated circuit intended for use in DC-DC converter, hard drive, DC motor control, and other power applications. It is mainly used to drive the gate of MOSFETs or IGBTs with high current capability and low minimum Vgs threshold. It supports multiple operation modes, including high speed switching mode, optimized soft-switching mode, and a spread spectrum mode, to reduce EMI and to improve the EMC. It also has short-circuit protection, thermal shut-down protection and low-side FET current sensing, making it ideal for high reliability applications.

Working Principle of TC4469EJD

TC4469EJD implements a two-channel nominal half bridge driver with two independent full bridge gate drivers and can alternately switch the two halves of the bridge, making it ideal for MOSFET or IGBT current control. The TC4469EJD is powered by an integrated low dropout voltage regulator supply from 4.5V to 18V and provides an output voltage up to 20V of peak gate drive current. The channel-to-channel propagation delay is kept to minimum for faster switching times. It also has slewing current limit, pre-charging function and can be used to regulate the body diode of the low side FET for faster recovery time.

TC4469EJD includes a variety of protections and diagnostics features. It has built in thermal protection and contains a temperature warning comparator to protect against overtemperature. It also features supply under-voltage lockout, short circuit protection and a current limit protection. The current limit protection will limit the output current to 2.7Arms/channel and short-circuit protection will limit the output voltage.

Conclusion

To sum up, TC4469EJD is an advanced, dual full-bridge gate driver PMIC IC designed to drive and control various types of power MOSFETs and IGBTs in power management applications. It offers excellent gate drive characteristics, high dv/dt immunity, and wide operating range, and also provides multiple protective functionalities such as thermal protection, supply under-voltage lockout, current limit protection, and short-circuit protection. These features make TC4469EJD ideal for applications requiring high reliability and precise control.

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