BH5511KV-E2

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Power Management ICs (PMICs) are semiconductor components designed to manage the power delivery to the different peripherals of a system. PMICs are divided into various categories, such as Motor Drivers, Controllers, etc. BH5511KV-E2 is one such component belonging to Motor Drivers, Controllers category.

BH5511KV-E2 is an automotive grade Motor Controller with integrated MOSFETS, based on High-Side Driving Technology. It is an advanced solution intended for driving DC brushless motors, with a closed-loop current control. It is capable of providing up to 55A output current, with a continuous output power of up to 11W. The component has been designed to operate in temperatures ranging from -40C to +125C.

BH5511KV-E2 is a highly integrated solution meant for automotive applications such as electric power steering (EPS), window lifts, sunroofs, mirrors, electric fans, etc. It is designed to support a wide range of automotive protocols and is compliant with IEC61508- 2 SIL3 safety standard.

The working principle of BH5511KV-E2, as a brushless DC motor (BLDC) controller, is based on a switched reluctance design. The component works by switching the phase of the motor\'s phase winding to control the speed of the motor. The phase windings are switched on and off in a pulse width modulation (PWM) manner. The component is designed to work with a wide range of interface protocols such as LIN, J1850 and CAN.

The component employs a sensor-less control mechanism which enables the motor to be operated without requiring any additional sensors. It is capable of driving motors with a winding resistance as low as 0.2 ohm, making it suitable for higher efficiency motor applications. The component also incorporates an over- temperature protection feature to protect the motor, in case of an over-temperature condition.

BH5511KV-E2 also has a current sense amplifier built-in to ensure an accurate control of the output current. The current sense amplifier provides a voltage output, which is proportional to the current flowing through the motor. This output is then used to adjust the duty cycle of the PWM signal to regulate the current flowing through the motor. The current sense amplifier is also capable of detecting an over-current condition and can trigger an over-current fault signal.

The component also features an internal bootstrap diode, which is used to boost the gate voltage of the MOSFETs. This ensures a fast switching of the power MOSFETs, making it possible to achieve high efficiency in the motor control system. Additionally, the component has an integrated RF shield, which helps to protect the system from high-frequency noise.

In summary, BH5511KV-E2 is a highly integrated Motor Controller intended for automotive applications such as electric power steering (EPS), window lifts, sunroofs, mirrors and electric fans. It is based on a switched reluctance architecture and is capable of driving a DC brushless motor with a closed-loop current control. Further, it is compliant with IEC61508-2 SIL3 safety standard, has a wide operating temperature range, supports a variety of automotive protocols and features an over-temperature protection.

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