MTS2916A
Dual Full-Bridge Motor Driver
Features
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•
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•
•
•
•
•
•
•
•
•
•
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
ON
Output Resistance
Low Quiescent Current
Operating Temperature Range: -20°C to +85°C
Pin Compatible with Allegro 2916
Description
The MTS2916A motor driver is a CMOS device capa-
ble 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 sus-
taining 40V and delivering up to 750 mA of continuous
current. The output current level is controlled by an
internal 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.
Applications
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•
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Stepper Motor Actuators
DC Motor Actuators
Automotive HVAC Ventilation
Automotive Power Seats
Note:
The MTS2916A device is formerly a
product of Advanced Silicon.
Package Types
SOP-24
2010 Microchip Technology Inc.
DS22259A-page 1
MTS2916A
Functional Block Diagram
VLOGIC
VLOAD
PHASE1
I01
I11
VREF1
Current
Sense
Comparator
Logic
Shift
Drivers
OUT1A
Power
Bridge
OUT1B
One-sh ot
Under-V
Lockou t
Thermal
Shutdown
PHASE2
I 02
I 12
VREF2
Current
Sense
Comparator
Logic
Shift
Drivers
OUT2A
Power
Bridge
OUT2B
One-sh ot
COMPIN1 COMPIN2
RC2
RC1
GND
SENSE1 SENSE2
DS22259A-page 2
2010 Microchip Technology Inc.
MTS2916A
Typical Application
5V
1 0 to 30V
100 nF
100 nF
100 uF
VLOGIC
PHASE1
I01
I11
VREF1
Logic / uP
Current
Sense
Comp arator
Logic
VLOAD
Shift
Drivers
OUT1A
Power
Bridge
OUT1B
One-shot
Under-V
Lockout
PHASE2
I02
I12
Current
Sense
Comp arator
COMPIN2
Thermal
Sh utdown
Shift
Logic
Drivers
OUT2A
Power
Bridge
M
OUT2B
VREF2
One-shot
COMPIN1
RC2
RC1
GND
SENSE1
SENSE 2
Rt
Ct Ct
Rt
Rt
Rt
Rc
Cc
Rc
Cc
2010 Microchip Technology Inc.
DS22259A-page 3
MTS2916A
1.0
ELECTRICAL
CHARACTERISTICS
† Notice:
Stresses above those listed under “Maximum Rat-
ings” 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. Expo-
sure to maximum rating conditions for extended periods may
affect device reliability.
Absolute Maximum Ratings †
Logic Supply Voltage (V
LOGIC
) ......................... -0.3 to +5.5V
Load Supply Voltage (V
LOAD
) .......................... -0.3 to +40.0V
Logic Input Voltage Range (V
IN
) ....... -0.3 to VLOGIC + 0.3V
V
REF
Voltage Range (V
REF
) ............................. -0.3 to +10.0V
Output Current (Peak) ..................................................... ±1A
Output Current (Continuous) ...................................... ±0.75A
Sense Output Voltage ...................................... -0.3V to 1.5V
Junction Temperature (T
J
).............................-20°C to +150°C
Operating Temperature Range (T
OPR
)............-20°C to +85°C
Storage Temperature Range (T
STG
) .............-55°C to +150°C
ELECTRICAL CHARACTERISTICS
Electrical Specifications:
Unless otherwise specified, all limits are established for V
LOGIC
= 4.5V to 5.5V,V
LOAD
= 30V,V
REF
= 5V,
T
A
= 25°C
Parameters
DC Characteristics
Sym
Min
Typ
Max
Units
Conditions
Logic Supply Voltage
Load Supply Voltage
Logic Supply Current
V
REF
Voltage Range
Driver Supply Current
Control Logic Input Current
(V
IN
= 0V)
Logic Low Input Voltage
Logic High Input Voltage
Current Limit Threshold
Ratio (V
REF
÷ V
SENSE
)
Driver Output Saturation
Voltage V
CE(SAT)
V
LOGIC
V
LOAD
I
VLOGIC
V
REF
I
VLOAD_ON
I
VLOAD_OFF
I
IN
V
IL
V
IH
V
REF
_V
SENS
E
4.5
10
—
1.5
—
—
—
—
2.4
9.5
13.5
25.5
—
—
—
—
—
—
—
—
—
5.0
30
0.8
5.0
0.55
0.55
—
—
—
10
15
30
0.55
0.90
1.05
1.85
0.95
1.00
—
—
170
5.5
40
1.0
7.0
1.0
1.0
-70
0.8
—
10.5
16.5
34.5
0.65
1.00
1.40
2.10
1.30
1.30
-50
50
—
V
V
mA
V
mA
mA
µA
V
V
—
—
—
V
V
V
V
V
V
µA
µA
°C
Both Bridges ON, No Load
Both Bridges Off
I01,I11,I02,I12,PHASE1,PHASE2,
(Note 1)
I01,I11,I02,I12,PHASE1,PHASE2
I01,I11,I02,I12,PHASE1,PHASE2
I0=L,I1=L
I0=H,I1=L
I0=L,I1=H
(Sink) IOUT = +500 mA
(Sink) IOUT = +750 mA
(Source) IOUT = -500 mA
(Source) IOUT = -750 mA
I
F
= 750 mA
I
F
= 750 mA
VOUT = 0V
V
OUT
= V
LOAD
V
ONN
(Low Side)
V
ONP
(High Side)
Clamp Diode Forward Volt-
age
(Note 2)
Driver Output Leakage Cur-
rent
Thermal Shutdown Temper-
ature
V
F_NDIODE
V
F_PDIODE
I
LEAK
T
J_SHDN
AC Characteristics
Cut-off Time (one-shot
pulse)
Turn-off Delay
T
OFF
T
D
—
—
50
1.5
—
58
10
—
µs
µs
Rs=1
,Rc=1k
,Cc=820pF,
Rt=56k
, Ct=820pF
Note 1:
2:
V
IN
= 5.0V input current given by internal pull-up to Logic Supply.
Clamp/Freewheel diode is the intrinsic body-drain diode of the NMOS and PMOS transistors.
DS22259A-page 4
2010 Microchip Technology Inc.
MTS2916A
TEMPERATURE SPECIFICATIONS
Parameters
Recommended Temperature Ranges
Sym
Min
Typ
Max
Units
Conditions
Junction Temperature Range
Operating Temperature Range
Thermal Package Resistance
T
J
T
A
JA
JC
-20
-20
—
—
76
16
+125
+70
—
—
°C
°C
Thermal Resistance, SOP-24
°C/W
EIA/JEDEC JESD51-10
2010 Microchip Technology Inc.
DS22259A-page 5
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