SA57AHU Apex Microtechnology

SA57A RoHS Switching Amplifier COMPLIANT FEATURES Low Cost Intelligent Switching Amplifier Directly Connects to Most Embedded Micro-Controllers and Digital Signal Controllers Integrated Gate Driver Logic with Dead-Time Generation and Shoot-Through Prevention Wide Power Supply Range (8.5V to 60V) Over 15A Peak 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 DESCRIPTION The SA57A is a fully integrated switching amplifier designed primarily to drive DC brush motors. Two independent half bridges provide over 15 amperes peak output current under micro-controller or DSC con- trol. Thermal and short circuit monitoring is provided, which generates fault signals for the micro-controller to take appropriate action. Additionally, cycle-by-cycle current limit offers user programmable hardware protection independent of the micro-controller. Output current is measured using an innovative low loss technique. The SA57A is built using a multi-technology process allowing CMOS logic control and complementary 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 HSOP surface mount package balances excellent thermal performance with the advantages of a low profile surface mount package. Apex Microtechnology Inc. Mar 2019 www.apexanalog.com All rights reserved SA57U Rev GSA57A Figure 1: Block Diagram V + S V DD V 1 S V 2 S SC TEMP I1 Fault V V DD DD I /DIS1 LIM I2 Signal I1 I2 Gate DIS2 Control Out 1 1t Phase 1 1b Control PWM Logic Out 2 Signals 2t Phase 2 2b SGND PGND 1 PGND 2 GND 2 SA57U Rev G