ISL8488IPZ

Introduction

The ISL8488IPZ is an integrated power stage IC designed to drive three high-sidePower MOSFETs, or two Power MOSFETs and one N-channel MOSFET in three-phase motor control applications. It has a small package size that reduces its footprint and costs, and is suitable for a wide variety of motor control applications, ranging from automotive powertrain systems to medical device, HVAC and industrial motor control. The ISL8488IPZ integrates three high-side driver stages for driving three 10A Power MOSFETs or two 10A Power MOSFETs and one N-channel MOSFET in three-phase configurations. It includes voltage and current limits that protect the bus voltage and the load from over current and short circuit, and helps to reduce the power dissipation for the device. Additionally, it supports overvoltage protection in all phases to protect the device from over voltage from the load.

Application Field

The ISL8488IPZ is designed to drive three high-side Power MOSFETs, or two Power MOSFETs and one N-channel MOSFET in three-phase motor control applications. This device is ideal for use in motor control applications such as automotive powertrain systems, medical device, HVAC, industrial motor control and motion control applications. The device can be used to drive three-phase brushless DC (BLDC) motors, permanent magnet synchronous motors (PMSM) and induction motors, up to a few hundred watts, with very high efficiency. The chip also features advanced features such as integrated over current and short circuit protection, under-voltage lockout, multi-phase and multi-level protection and over temperature protection. The ISL8488IPZ is also suitable for driving in non-motor control applications such as smart lighting, lighting controllers and other types of power conversion applications.

Working Principle

The ISL8488IPZ uses a three-phase driver topology that consists of three independent driver stages, each comprised of a driver, an over voltage monitor circuit and two current limit circuits. Each driver stage is capable of providing up to 10A of current in switching a pair of power MOSFETs, or a single N-channel MOSFET. The typical architecture of the ISL8488IPZ is shown in figure 1.

The ISL8488IPZ has two separate 4-channel PWM signal inputs, one for the high-side driver and one for the low-side driver. There are also input and output pins for voltage feedback and current limit feedback. The three channels have independent enable signals, as well as independent enable pins for the PWM signal inputs. The enable and PWM inputs are coupled together, allowing for the flexibility to enable or disable one or more of the channels independently. The device also features integrated thermal protection, under-voltage lockout, over-temperature protection, and over-current and short circuit protection.

Conclusion

The ISL8488IPZ is an integrated power stage IC designed to drive three high-side Power MOSFETs, or two Power MOSFETs and one N-channel MOSFET in three-phase motor control applications. It has a small package size that reduces its footprint and costs, and is suitable for a wide variety of motor control applications, ranging from automotive powertrain systems to medical device, HVAC and industrial motor control. The device uses a three-phase driver topology that consists of three independent driver stages, each comprised of a driver, an over voltage monitor circuit and two current limit circuits. The ISL8488IPZ is ideal for use in motor control applications such as automotive powertrain systems, medical device, HVAC, industrial motor control and motion control applications. The device also features advanced features such as integrated overcurrent and short circuit protection, under-voltage lockout, multi-phase and multi-level protection and over temperature protection.