BA6424AFS-E2

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Power management integrated circuits (PMICs) are essential components in today\'s electronic systems, from smartphones to high-end server farms. Focused on high-accuracy power optimization and advanced integration, PMICs enable efficient, reliable and cost-effective solutions for embedded applications. One such device is the BA6424AFS-E2, an ultra-low-power integrated motor driver for electric bicycles and other small motor applications.

The BA6424AFS-E2 is a highly integrated, low-power, two-channel integrated motor driver IC specifically designed for electric bicycle applications. It supports two Hall-sensor based brushed DC motors with peak current ratings up to 1.2A and is powered by a 5V supply. The IC features a power-save (PS) mode and uses a N-channel MOSFET driver architecture that contributes to a very low power consumption of only 1.05µA in PS mode. Furthermore, it can operate with high efficiency in a wide input voltage range (3.2V - 5V).

The BA6424AFS-E2 features an integrated charge pump and two open-drain high-side FET drivers. It also has an auto-startup and inactive mode, which prevents over-current operation in the absence of an external Hall sensor signals. The IC has a high precision current offset compensation circuit to minimize the off-state current of the FETs. On-chip analog controls include an internal resistor to set the torque limit and a saw-wave generator for PWM frequency control.

In its application field, the BA6424AFS-E2 is quite versatile, being suitable for a variety of small motor applications such as electric motors, windshield wipers, seat-adjustment motors, air cleaners, and window-glass lifters. Furthermore, its low power consumption makes it an ideal choice for applications where energy efficiency is paramount. The device allows for flexibility and scalability in terms of motor control, with the ability to program the motor\'s position and speed using external Hall sensors.

Regarding its working principle, the BA6424AFS-E2 features an N-channel MOSFET driver architecture that supports both open-drain and push-pull drivers. The device has two channels, each consisting of two MOSFET drivers and a current offset-compensation circuit to reduce the off-state current. The driver can support the full range of Hall sensor signals for controlling the motor\'s speed, and the on-chip saw-wave generator can be used for PWM frequency control. The device also has an auto-startup and inactive mode, which helps prevent over-current operation in the absence of an external Hall sensor signal. Furthermore, it has an integrated charge pump, as well as a built-in protection circuit that protects the IC from over-currents.

In summary, the BA6424AFS-E2 is an ultra-low-power integrated motor driver IC specifically designed for small motor applications such as electric bicycles. Its low-power consumption, high efficiency, integrated charge pump, and built-in protection circuits make it the perfect choice for energy-conscious applications. The device features a N-channel MOSFET driver architecture, two external Hall-sensors, and on-chip analog controls, allowing for precise control of small motors by external Hall sensor signals.

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