They are constructed in a low-profile 20-pin QFN package (suffix “ES”) and 20-pin eTSSOP package (suffix “LP”) with exposed thermal pads. Voltage output proportional to load currentīoth the A4955 and A4956 offer commercial and automotive temperature grade models, operating in a wide temperature range from -40 ✬ to 125 ✬.
Other common features these devices offer include: Current magnitude fed into the gates of the external FET bridge is set by an external resistor. Customers can control the slew rate for EM compliance.
#BUNKER HILL SECURITY CAMERA WIRES DRIVER#
Another one is the ability of gate driver ICs to be programmed for flexibility. The voltage is amplified with a gain of 10 and enters to the AIOUT terminal, thus allowing a real-time and precise estimate of current for customers. A sample-and-hold serves to capture and hold the peak value of the voltage across the sense resistor at off time and wait for the next PWM cycle. These gate driver ICs also provide special features including the AIOUT, an analog output proportional to the sense voltage that is capable of monitoring the current together with the external sense resistor. A5957 – controls the bridge in forward and reverse with slow decay SR using Phase, Enable, and SLEEPn inputs.A4956 – controls the bridge in forward, reverse, brake, and fast decay using Phase, Enable, and Mode inputs.A4955 – controls the bridge in forward, reverse, brake and standby using parallel control.Listed below are important interface features of each device. Each device meets customer needs with no or little firmware changes. The A4955, A4956, and A5957 provide distinct interface features.
These devices are perfect for industrial and consumer use including automatic gates and turnstiles, cash dispensing machines, coffee vending machines, robotic vacuums, ticketing machines, sewing machines, and other various vending machines. The A4955, A4956, and A5957 are full-bridge PWM motor gate driver integrated circuits (ICs) suitable for brushed DC motors with up to 50 V of supply voltages and up to 20 A of load currents. Developed for PWM control of brushed DC motors in Industrial and Consumer UseĪllegro MicroSystems, LLC developed a family of interface ICs that drives a different set of brushed DC motors in various applications.
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