ISL6614IB

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The ISL6614IB is a PMIC - Gate Driver that comes with a range of integrated features that are intended to simplify design and reduce board space. It is a low-voltage floating-gate device that is capable of driving two channels of high-side, low-side and dual-channelmosfets with two integrated configurable logic drivers for external logic controls. It offers a wide input voltage range of 6.5V to 18V, adjustable dead time logic and adjustable current-protection thresholds.

The ISL6614IB is mainly used in multiplexed LED lighting systems, automotive H-bridge applications, active switching controllers and DC motor controllers. It can work in a wide temperature range of -40°C to +125°C and has an adjustable dead time setting logic based on driving MOSFETs of various loads.

Working Principle

The ISL6614IB effectively operates as an H-bridge driver which allows for the control of two MOSFETs switches from a single control signal. The ISL6614IB utilizes the principles of non-overlapping gate driving, eliminating gate ringing and protection against conduction shoot-through in order to drive MOSFETs efficiently and reliably. The non-overlapping gate driving system consists of two timing signals, V(gate1) for driving the low-side switch and V(gate2) for driving the high-side switch.

Furthermore, the integrated circuit offers adjustable current protection thresholds, while the adjustable dead-time setting logic allows the circuit to drive MOSFETS of different loads. The adjustable dead-time setting logic also provides protection against inrush and turn-on current surges. Finally, the circuit also features protection against cross-conduction by disabling the outputs if a deliberate fault is detected after the comparison of V(gate1) and V(gate2).

The ISL6614IB also features two integrated configurable logic drivers for external logic controls, allowing the user to implement low-power control of their H-bridge circuits. The two configurable logic drivers can be used in several different ways; they can be used to generate independent events depending on voltage/current and/or temperature, or they can be used to directly control and sequence the driver’s outputs or other devices on the system.

Conclusion

The ISL6614IB Gate Driver is a useful and highly versatile device designed for multiple H-bridge motor control applications. It offers a wide input voltage range, adjustable dead time logic and adjustable current-protection thresholds. It also has an adjustable dead-time setting logic, allowing the circuit to drive MOSFETs of varying loads, and two integrated configurable logic drivers for external logic controls. The ISL6614IB can be used in multiplexed LED lighting systems, automotive H-bridge applications, active switching controllers and DC motor controllers.

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