Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsPMICsPMIC - motor controllers Half-bridge (4) Parallel SOP 24

 2010-2013 Microchip Technology Inc. DS22259C-page 1

Features

• 750 mA Continuous Output Current

• Load Voltage Supply: 10V to 40V

• Full Bipolar Stepper Motor Drive Capability

• Bidirectional DC Motor Capability

• Internal Fixed T

OFF

Time PWM Current Control

• Internal Protection Diodes

• Internal Thermal Shutdown

• Under Voltage Lockout

• LS-TTL Compatible Logic Inputs with Pull-Up

Resistors

•Low R

Output Resistance

• Low Quiescent Current

• Operating Temperature Range: -40°C to +105°C

• Pin Compatible with Allegro 2916

Applications

• Stepper Motor Actuators

• DC Motor Actuators

• Automotive HVAC Ventilation

• Automotive Power Seats

Description

The MTS2916A motor driver is a CMOS device

capable of driving both windings of a bipolar stepper

motor or bidirectionally control two DC motors. Each of

the two independent H-bridge outputs is capable of

sustaining 40V and delivering up to 750 mA of

continuous current. The output current level is

controlled by an internal pulse-width modulation

(PWM) circuit that is configured using two logic inputs,

a current sense resistor and a selectable reference

voltage. The H-bridge outputs have been optimized to

provide a low output saturation voltage drop.

Full, half, and micro-stepping operations are possible

with the PWM current control and logic inputs. The

maximum output current is set by a sensing resistor

and a user selectable reference voltage. The output

current limit is selected using two logic level inputs. The

selectable output current limits are 0%, 33%, 67%, or

100% of the maximum output current. Each bridge has

a PHASE input signal which is used to control the direc-

tion of current flow through the H-bridge and the load.

The H-bridge power stage is controlled by non-overlap-

ping signals which prevent current cross conduction

when switching the direction of the current flow. Internal

clamp diodes protect against inductive transients.

Thermal protection circuitry disables the outputs when

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

Note: The MTS2916A device is formerly a

product of Advanced Silicon.

GND

OUT2A

LOAD

I02

I12

PHASE2

REF2

RC2

GND

COMPIN1

OUT1A

SENSE1

GND

LOGIC

OUT2B

RC1

REF1

SENSE2

COMPIN2

MTS2916A

SOP-24

PHASE1

I11

OUT1B

I01

Dual Full-Bridge Motor Driver

MTS2916A

Summary of content (20 pages)

PAGE 1
MTS2916A Dual Full-Bridge Motor Driver Features Description • • • • • • • • • The MTS2916A motor driver is a CMOS device capable of driving both windings of a bipolar stepper motor or bidirectionally control two DC motors. Each of the two independent H-bridge outputs is capable of sustaining 40V and delivering up to 750 mA of continuous current.
PAGE 2
MTS2916A Functional Block Diagram VLOGIC VLOAD PHASE1 I01 Drivers Shift Logic OUT1A Power Bridge I11 Current Sense Comparator VREF1 OUT1B One-shot Thermal Shutdown Under-V Lockout PHASE2 Shift Logic I02 Drivers Power Bridge I12 Current Sense Comparator VREF2 COMPIN1 DS22259C-page 2 COMPIN2 OUT2A OUT2B One-shot RC2 RC1 GND SENSE1 SENSE2  2010-2013 Microchip Technology Inc.
PAGE 3
MTS2916A Typical Application 5V 10 to 30V 100 µF 100 nF VLOGIC 100 nF VLOAD PHASE1 I01 I11 Shift Logic Drivers Power Bridge OUT1A Logic/µP OUT1B VREF1 Current Sense Comparator One-shot Under-V Lockout PHASE2 I02 Shift Drivers OUT2A Logic I12 VREF2 Thermal Shutdown Power Bridge Current Sense Comparator M One-shot RC2 COMPIN1 COMPIN2 RC1 Ct Rt  2010-2013 Microchip Technology Inc.
PAGE 4
MTS2916A 1.0 ELECTRICAL CHARACTERISTICS † Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. Absolute Maximum Ratings † Logic Supply Voltage (VLOGIC) ......................... -0.
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MTS2916A TEMPERATURE SPECIFICATIONS Parameters Sym Min Junction Temperature Range TJ Operating Temperature Range Typ Max Units -40 +125 °C TA -40 +105 °C JA — 76 — — 16 — Conditions Recommended Temperature Ranges Thermal Package Resistance Thermal Resistance, SOP-24  2010-2013 Microchip Technology Inc.
PAGE 6
MTS2916A 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 2-1. TABLE 2-1: MTS2916A PIN FUNCTION TABLE Pin No.
PAGE 7
MTS2916A 2.1 Current Detection Selection (I01, I02, I11, I12) Comparator input for current threshold detection. The voltage across the sense resistor is fed back to this input through the low pass filter RcCc. The power transistors are disabled when the sense voltage exceeds the reference voltage of the selected comparator. When this occurs, the current decays for a time set by RtCt (TOFF = 1.1 RtCt). 2.
PAGE 8
MTS2916A 3.0 FUNCTIONAL DESCRIPTION 3.1 Each motor winding is driven by an H-type bridge consisting of two N- and two P-transistors that allow the current to flow in both winding directions, depending on the value of the PHASE signal (Table 3-1). The H-bridge can be set in five configurations that are related to the digital inputs PHASE, I0 and I1, and to the current sensed. These configurations are shown in Table 3-2.
PAGE 9
MTS2916A 3.2 PWM Current Control The current level in each motor winding is controlled by a PWM circuit with a fixed TOFF time. The load current flowing in the winding is sensed through an external sensing resistor RS connected between the power bridge's source pin SENSE (sources of transistors Na and Nb) and GND. VLOAD Power Bridge VREF Pa Pb One-Shot OUTA ÷10 Source Disable OUTB I0 I1 FIGURE 3-2: Na RC COMPIN CC RC Ct SENSE RS Rt PWM Current Control Circuit Principle (Channel 1 Shown).
PAGE 10
MTS2916A When the maximum allowed current is reached, the bridge source is turned off during a fixed period TOFF (typically 50 µs) given by a non-retriggerable pulse generator and the external timing components Rt (20k-100 k range) and Ct (100 pF-1000 pF range): EQUATION 3-2: T OFF = 1.1   R t  C t  3.3 Circuit Protection A thermal protection circuitry turns off all drivers when the junction temperature exceeds a safe operating limit of +170°C (typical).
PAGE 11
MTS2916A 4.0 APPLICATION CIRCUITS AND ISSUES 4.1 Typical Application The MTS2916A circuit, with external components for a typical application, is shown in Figure 4-1. Typical passive component values are: RS = 1, RC = 1 k, CC = 820 pF, Rt = 56 k and Ct = 820 pF.
PAGE 12
MTS2916A 4.2 Stepping Examples The MTS2916A control modes are full-step, half-step, modified half-step and microstepping control of the motor, as shown in Figure 4-2. Half-Step Full-Step 1 2 3 4 1 2 3 4 5 6 7 8 Modified Half-Step 1 2 3 4 5 6 7 8 Micro-Stepping (1/8th) 1... ...32 I01 I11 PHASE1 I02 I12 PHASE2 5V VREF1 VREF2 0V 5V 5V 5V 5V 0V +500 mA Motor Current in Phase 1 0 -500 mA +167 mA Motor Current in Phase 2 FIGURE 4-2: 4.
PAGE 13
MTS2916A 5.0 PACKAGING INFORMATION 5.1 Package Marking Information 24-Lead SOP Example YYWWNNN Legend: XX...X Y YY WW NNN e3 * Note: MTS2916A e3 GC1 ^^ 1240256 Customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week ‘01’) Alphanumeric traceability code Pb-free JEDEC designator for Matte Tin (Sn) This package is Pb-free.
PAGE 14
MTS2916A SOP 24L Package Outline Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging. 24 13 1 0.016 typ 12 0.05 typ D L GAUGE PLANE SEATING PLANE Note: The package drawing dimensions are expressed in inches. Symbol Minimum Typical A — — Note 1: 2: 3: A1 0.102 (0.004) D 15.545 (0.612) Maximum 2.642 (0.104) — 15.697 (0.618) — Unit mm (inch) mm (inch) 15.850 (0.624) mm (inch) E 7.417 (0.
PAGE 15
MTS2916A APPENDIX A: REVISION HISTORY Revision C (March 2013) The following is the list of modifications: 1. 2. Corrected one dimension in the package drawing. Added a note mentioning the unit type used in the drawing. Minor editorial changes. Revision B (December 2012) The following is the list of modifications: 1. 2. 3. 4. Updated Operating Temperature Range throughout the document. Corrected Typical Application diagram. Added Section 5.1, Package Marking Information.
PAGE 16
MTS2916A NOTES: DS22259B-page 16  2010-2013 Microchip Technology Inc.
PAGE 17
MTS2916A PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO.
PAGE 18
MTS2916A NOTES: DS22259B-page 18  2010-2013 Microchip Technology Inc.
PAGE 19
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
PAGE 20
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