L9856-TR

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The L9856-TR is part of STMicroelectronics\' Electric Vehicle (EV) BMS Control IC family. It is a gate driver IC that can operate from a single-supply voltage of up to 50V and provides up to 4 independent gate driver outputs which are controlled by a selectable slew rate regulator (SRR). The L9856-TR can be used in a wide range of applications, including automotive inverters and DC-DC converters.

When it comes to gate driving, the L9856-TR acts as an interface between the main power electronics driver and the external low-voltage DC/DC converter power devices. It has a high-side driver with an adjustable current limit and supports both static (not adjustable) voltage and dynamic (adjustable) voltage drive modes. It also provides protection features like under-voltage lockout (UVLO), over-voltage protection (OVP), short-circuit protection (SCP), and temperature shutdown (TSD).

The L9856-TR is a dual-channel gate driver IC. Each channel has two control channels: one for high side and one for low side. The low side channel is responsible for controlling the gate driver for the output side of a power device. It can be programmed to deliver a high drive voltage up to 50V and a low drive voltage up to 10V. This makes the L9856-TR ideal for a wide range of automotive applications. The high side channel is responsible for controlling the gate driver for the input side of a power device. It has an adjustable current limit which can be programmed to deliver a maximum output current up to 4A. This allows the L9856-TR to interface with a wide range of devices.

The L9856-TR also has two SRRs that can be used to control the slew rate of the gate drivers. The SRRs are controlled by the digital inputs, HV and LV, and the analog input, SSR. The HV and LV inputs control the rise and fall time of the driver, respectively. The SSR input controls the current limit setting of the driver from a programmed minimum to a maximum value. This makes the L9856-TR suitable for applications that require adjustable voltage and current limiting.

In summary, the L9856-TR is a robust gate driver IC that can be used in a variety of automotive and other applications. It features adjustable current and voltage limits, over and under voltage protection, and temperature shutdown. The SRRs enable fast and accurate control of the gate driver slew rates. The L9856-TR makes it easy to interface with a range of power devices and ensures that they are driven correctly and safely.

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