ADM00308 Microchip

MTS2916A Dual Full-Bridge Motor Driver Features Description 750 mA Continuous Output Current The MTS2916A motor driver is a CMOS device capable of driving both windings of a bipolar stepper Load Voltage Supply: 10V to 40V motor or bidirectionally control two DC motors. Each of Full Bipolar Stepper Motor Drive Capability the two independent H-bridge outputs is capable of Bidirectional DC Motor Capability sustaining 40V and delivering up to 750mA of Internal Fixed T Time PWM Current Control OFF continuous current. The output current level is Internal Protection Diodes controlled by an internal pulse-width modulation Internal Thermal Shutdown (PWM) circuit that is configured using two logic inputs, a current sense resistor and a selectable reference Under Voltage Lockout voltage. The H-bridge outputs have been optimized to LS-TTL Compatible Logic Inputs with Pull-Up provide a low output saturation voltage drop. Resistors Full, half, and micro-stepping operations are possible Low R Output Resistance ON with the PWM current control and logic inputs. The Low Quiescent Current maximum output current is set by a sensing resistor Operating Temperature Range: -40C to +105C and a user selectable reference voltage. The output Pin Compatible with Allegro 2916 current limit is selected using two logic level inputs. The selectable output current limits are 0%, 33%, 67%, or Applications 100% of the maximum output current. Each bridge has a PHASE input signal which is used to control the direc- Stepper Motor Actuators tion of current flow through the H-bridge and the load. DC Motor Actuators The H-bridge power stage is controlled by non-overlap- Automotive HVAC Ventilation ping signals which prevent current cross conduction Automotive Power Seats when switching the direction of the current flow. Internal clamp diodes protect against inductive transients. Note: The MTS2916A device is formerly a Thermal protection circuitry disables the outputs when product of Advanced Silicon. the junction temperature exceeds the safe operating limit. No special power-up sequencing is required. Undervoltage Lockout circuitry prevents the chip from operating when the load supply is applied prior to the logic supply. The device is supplied in a 24-pin SOP package. Package Types MTS2916A SOP-24 I02 1 24 V LOAD I12 2 23 OUT2B PHASE2 3 22 COMPIN2 SENSE2 V 4 21 REF2 RC2 5 20 OUT2A GND 6 19 GND GND 7 18 GND V OUT1A 8 17 LOGIC RC1 9 16 SENSE1 V 10 15 COMPIN1 REF1 11 14 PHASE1 OUT1B I11 12 13 I01 2010-2013 Microchip Technology Inc. DS22259C-page 1MTS2916A Functional Block Diagram V V LOGIC LOAD PHASE1 Shift Drivers Logic I01 OUT1A Power I11 Bridge OUT1B Current V REF1 Sense One-shot Comparator Thermal Under-V Shutdown Lockout PHASE2 Shift Drivers Logic I02 OUT2A Power I12 Bridge OUT2B Current V REF2 Sense One-shot Comparator COMPIN1 COMPIN2 RC2 RC1 GND SENSE1 SENSE2 DS22259C-page 2 2010-2013 Microchip Technology Inc.