Full-Bridge Power Amplifier

This full-bridge power Amplifier is rated for continuous output current of 0.8 Am- peres and is intended for use in demanding servo applications such as head positioning for high-density disk drives. The device includes a precision current sense Amplifier that provides accurate control of load current. Current is sensed with a single resistor in series with the load. The power Amplifier has a very low output saturation voltage and will operate down to 4V supply levels. Power output stage protection includes current limiting and thermal shutdown. Auxiliary functions on this device include a dual-input under-voltage compara- tor, which CAN monitor two independent supply voltages and force a built-in head park function when either is below minimum. When activated by either the UV Comparator or a command at the separate PARK input, the park circuitry will override the Amplifier inputs to convert the power outputs to a programma- ble constant voltage source which will hold regulation as the supply voltage falls to below 3.0 Volts. Added features include a POWER OK flag output, a LIMIT input to force the drive output to its maximum level in either polarity, and a over-riding INHIBIT input to disable all Amplifiers and reduce quiescent sup- ply current. This device is packaged in a power PLCC surface mount configuration which maintains a standard 28-pin outline, but with 7 pins along one edge allocated to ground for optimum thermal transfer. And is also available in a 24-pin surface mount SOIC package. By Texas Instruments
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UC3175B Pinout, Pinouts
UC3175B pinout,Pin out
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