TPS2836DR

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Gate drivers are essential for power circuit design. The purpose of a gate driver is to provide the necessary current and/or voltage to control the gate of a field effect transistor (FET) switch. This type of switch critically affects the performance of a power converter and, with the ever-increasing requirements for higher switching frequency and higher current capabilities, the choice of the right gate driver is becoming increasingly important. The TPS2836DR is one such advanced gate driver specifically designed for high-performance switching applications.

The TPS2836DR is a dual high-side/low-side MOSFET driver with an output voltage as high as +50V. The device utilizes an advanced control scheme to provide optimized switching performance, including low on-resistance, fast switching up to 100kHz, and full protection against overvoltage and overcurrent. The device also features a fault-protection scheme to provide protection in extreme conditions, helping to ensure system reliability.

In terms of applications, the TPS2836DR is widely applicable for high-performance switch-mode power converters, including DC-DC converters, motor drivers, solenoid drivers, and lamp drivers. Its high-voltage output enables it to drive high-side and low-side gate capacitors with sufficient current, enabling the device to handle current loads of up to 70A.

The TPS2836DR is mainly composed of two driver circuits. The high-side circuit is made up of a high-side DMOS switch and an output driver which can switch up to 1A of current. The low-side circuit consists of a low-side DMOS switch and an output driver which can switch up to 3A of current. Both circuits have under-voltage and over-voltage protection, current-sense amplifier outputs, and soft-start circuitry.

The under-voltage protection (UVP) feature of the TPS2836DR is designed to protect the MOSFETs from being damaged due to low-voltage events. When the input voltage drops below the set voltage threshold, the low output driver will be disabled and the high-side driver will remain enabled until the input voltage is restored. This prevents both MOSFETs from switching at the same time. The over-voltage protection (OVP) feature of the TPS2836DR is designed to protect against over-voltage events. If the input voltage exceeds the set voltage threshold, the high-side and low-side drivers are both disabled, preventing the MOSFETs from switching.

The current-sense amplifier output allows monitoring of the current in the load being supplied by the driver. The amplifier is capable of sensing very small currents, up to 150mA. The soft-start circuitry of the TPS2836DR is designed to limit maximum turn-on current when driving inductive loads. The soft-start feature is initiated by pulling the SS pin low. A capacitor connected to theSS pin determines the soft-start time.

In conclusion, the TPS2836DR is an advanced gate driver specifically designed for high-performance switch-mode power converters. It features an advanced control scheme to provide optimized switching performance, including low on-resistance, fast switching up to 100kHz, and full protection against overvoltage and overcurrent. The device is widely applicable for DC-DC converters, motor drivers, solenoid drivers, and lamp drivers. Its under-voltage and over-voltage protection, current-sense amplifier outputs, and soft-start circuitry make it an ideal choice for high-current, high-capacity switch-mode power applications.

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