SA53 Datasheet | Cirrus Logic

.. P r o d u c t IIn rr oo m nn no ovva a t i o n FF m SA53 SA53 DESCRIPTION The SA53 is a fully integrated switching amplifier designed primarily to drive DC brush motors. Two independent half bridges provide over 10 amperes peak output current under microcontroller or DSC control. Thermal and short circuit monitoring is provided, which generates fault signals for the microcontroller to take appropriate action. A block diagram is provided in Figure 1. Additionally, cycle-by-cycle current limit offers user programmable hardware protection independent of the microcontroller. Output current is measured using an innovative low loss technique. The SA53 is built using a multi-technology process allowing CMOS logic control and plementary DMOS output power devices on the same IC. Use of P-channel high side FETs enables 60V operation without bootstrap or charge pump circuitry. The Power Quad surface mount package balances excellent thermal performance with the advantages of a low profile surface mount package. Switching Amplifier Features - Low Cost Intelligent Switching Amplifier - Directly Connects to Most Embedded Microcontrollers and Digital Signal Controllers - Integrated Gate Driver Logic with Dead-time Generation and Shoot-through Prevention - Wide Power Supply Range (8.5 V To 60 V) - Over 10A Peak Output Current per Phase - 3A Continuous Output Current per Phase - Independent Current Sensing for each Output - User Programmable Cycle-by-cycle Current Limit Protection - Over-Current and Over-Temperature Warning Signals APPLICATIONS - Bidirectional DC Brush Motors - 2 Unidirectional DC Brush Motors - 2 Independent Solenoid Actuators - Stepper Motors Figure 1. BLOCK Diagram VS + VDD Vs 1 Vs 2 SC TEMP ILIM/D IS 1 I1 I2 Fault Logic I1' I2' D IS 2 1t 1b PWM Signals 2t 2b SGND Gate Control P ha se...