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SA57A-FHZ Datasheet(PDF) 8 Page - Cirrus Logic |
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SA57A-FHZ Datasheet(HTML) 8 Page - Cirrus Logic |
8 / 14 page SA57 8 SA57U P r o d u c t I n n o v a t i o n F r o m 2.SA57OPERATION The SA57 is designed primarily to drive DC brush motors. However, it can be used for any application requiring two high current outputs. The signal set of the SA57 is designed specifically to interface with a DSP or microcontroller. A typical system block diagram is shown in the figure below. Over-temperature, Short-Circuit and Current Limit fault signals provide important feedback to the system controller which can safely disable the output drivers in the pres- ence of a fault condition. High side current monitors for both phases provide performance information which can be used to regulate or limit torque. FIgURE4.SYSTEmDIAgRAm SA57 Switching Amplifier DC BRUSH MOTOR Vs 1 PGND 1 Current monitor Signals 1 2 OUT 1 OUT 2 PGND 2 GND Vs 2 Vs + GND SGND Gate Control Control Logic Fault Logic TEM P I LIM/D IS 1 SC I1 I2 V DD PWM Signals DIS2 SG ND 1t 1b 2t 2b M icrocontroller or DSC |
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