2010 Microchip Technology Inc. DS22260A-page 1
Features
• 750 mA Continuous Output Current
• Load Voltage Supply: 10V to 40V
• Full Bipolar Stepper Motor Drive Capabi lity
• Bidirectional DC Motor Capability
• Intern al Fixed TOFF Time PWM Current Control
• Internal Prote cti on Diod es
• 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 Comp a tib le w ith Alle gro 6219
Applications
• Stepper Motor Actuators
• DC Motor Actuators
• Automotive HVAC Ventilation
• Automotive Power Seats
Description
The MTS6 2C19A moto r driver i s a CMOS device cap a-
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 s elected us ing two logi c level i nputs. Th e
selectable output current limits are 0%, 33%, 67%, or
100% of the ma xi mum out put current. Eac h brid ge has
a PHASE inp ut signal which is used to control the direc-
tion of current flow through the H-bridge and the load.
The H-bri dge power st age is con trolled by non -overlap-
ping signals which prevent current cross conduction
when switching the directi on of the current flow. Interna l
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 MTS62C19A device is formerly a
product of Advanced Silicon.
SOP-24
Dual Full-Bridge Motor Driver
MTS62C19A
MTS62C19A
DS22260A-page 2 2010 Microchip Technology Inc.
Functional Block Diagram
Logic
One-shot
Current
Sense
Comparator
Under-V
Lockout
Logic
One-shot
Current
Sense
Comparator
Shift Drivers
Thermal
Shutdown
Shift Drivers
Power
Bridge
Power
Bridge
VREF2
I12
I02
PHASE2
I11
I01
PHASE1
VREF1
OUT1A
OUT1B
OUT2A
OUT2B
VLOADVLOGIC
COMPIN1 COMPIN2 RC2 RC1 GND SENSE1 SEN SE2
2010 Microchip Technology Inc. DS22260A-page 3
MTS62C19A
Typical Application
Logic
One -shot
Current
Se nse
Comparator
Under-V
Lockout
Logic
One -shot
Current
Se nse
Comparator
Shift Drivers
Thermal
Shutdown
Shift Drivers
Power
Bridge
Power
Bridge
VREF2
I12
I02
PH ASE2
I11
I01
PHASE1
VREF1
OUT1A
OUT1B
OUT2A
OUT2B
VLOAD
VLOGIC
COMPIN1 COMPIN2 RC2 RC1 GND SENSE1 SEN SE 2
M
100 nF 100 uF
10 to 30V
100 nF
Logic / uP
CtCt RtRt Rt Rt
Cc Rc
Cc Rc
5V
MTS62C19A
DS22260A-page 4 2010 Microchip Technology Inc.
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
Logic Supply Voltage (VLOGIC) ....................... .. -0.3 to + 5 .5V
Load Supply Vo ltage (VLOAD) .. ........................ -0.3 to + 4 0 .0 V
Logic Input V oltage Range (VIN) ....... -0.3 to VLOGIC + 0.3V
VREF Voltage Range (VREF)................... .......... -0.3 to + 1 0 .0 V
Output Current (Peak) ..................................................... ±1A
Output Current (Continuous) ...................................... ±0.75A
Sense Output Voltage ......... .. ...... ...... ...... . .... .... -0.3V to 1.5V
Junction Temperature (TJ).............. ...... ......... -20°C to +150°C
Operating Temperature Range (TOPR)............-20°C to +85°C
Storage Temperature Range (TSTG) .............-55°C to +150°C
† 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 maxi mum rating cond itions for ext ended periods may
affect device reliability.
ELECTR ICAL CHARACTERISTICS
Electrical Specifications: Unless otherwise specified, all limits are established for VLOGIC = 4.5V to 5.5V,VLOAD = 30V,VREF = 5V,
TA = 25°C
Parameters Sym Min Typ Max Units Conditions
DC Characteristics
Logic Supply Voltage VLOGIC 4.5 5.0 5.5 V
Load Supply Voltage VLOAD 10 30 40 V
Logic Supply Current IVLOGIC —0.81.0mA
VREF Voltage Range VREF 1.5 5.0 7.0 V
Driver Supply Current IVLOAD_ON — 0.55 1.0 mA Both Bridges ON, No Load
IVLOAD_OFF — 0.55 1.0 mA Both Bridges Off
Control Logic Input Current
(VIN = 0V) IIN — — -70 µA I01,I11,I02,I12,PHASE1,PHASE2,
(Note 1)
Logic Low Input Voltage VIL — — 0.8 V I01,I11,I02,I12,PHASE1,PHASE2
Logic High Input Voltage VIH 2.4 — — V I01,I11,I02,I12,PHASE1,PHASE2
Current Limit Threshold
Ratio (VREF ÷ VSENSE)VREF_VSENS
E
9.5 10 10.5 — I0=L,I1=L
13.5 15 16.5 — I0=H,I1=L
25.5 30 34.5 — I0=L,I1=H
Driver Output Saturation
Voltage VCE(SAT)
VONN
(Low Side) — 0.55 0.65 V (Sink) IOUT = +500 mA
— 0.90 1.00 V (Sink) IOUT = +750 mA
VONP
(High Side) — 1.05 1.40 V (Source) IOUT = -500 mA
— 1.85 2.10 V (Source) IOUT = -750 mA
Clamp Diode Forward Volt -
age (Note 2) VF_NDIODE — 0.95 1.30 V IF = 750 mA
VF_PDIODE — 1.00 1.30 V IF = 750 mA
Driver Output Leakage Cur-
rent ILEAK ——-50µAVOUT = 0V
——50 µAV
OUT = VLOAD
Thermal Shutdown Temper-
ature TJ_SHDN — 170 — °C
AC Characteristics
Cut-off Time (one-shot
pulse) TOFF —5058 µsRs=1,Rc=1k,Cc=820pF,
Rt=56k, Ct=820pF
Turn-off Delay TD—1.510 µs
——
Note 1: VIN = 5.0V input current given by internal pull-up to Logic Supply.
2: Clamp/Freewheel diode is the intrinsic body-drain diode of the NMOS and PMOS transistors.
2010 Microchip Technology Inc. DS22260A-page 5
MTS62C19A
TEMPERATURE SPECIFICATIONS
Parameters Sym Min Typ Max Units Conditions
Recommended Temp eratu re Ranges
Junction Temperature Range TJ-20 +125 °C
Operating Temperature Range TA-20 +70 °C
Thermal Package Resistance
Thermal Resistance, SOP-24 JA
JC
—
—76
16 —
—°C/W E IA/JEDEC JESD51-10
MTS62C19A
DS22260A-page 6 2010 Microchip Technology Inc.
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1: MTS62C19A PIN FUNCTION TABLE
2.1 Ground Terminal (GND)
Logic supply ground. Only the driver current flows out
of this pin; there is no high current. Minimize voltage
drops between this pin and the logic inputs.
2.2 Logic Supply Voltage (VLOGIC)
Conne ct VLOGIC t o the logic source voltage . Decouple
the supply with a 0.1 µF ceramic capacitor mounted
close to the VLOGIC and GND terminals.
2.3 Load Supply Volt age (VLOAD)
Connect VLOAD to the motor positive voltage supply.
The motor current is supplied through this pin and the
selected output transistors.
2.4 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 th roug h the low pass f ilt er R c Cc. The pow e r tra n-
sistors 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).
Pin No.
SOP-24 Type Name Function
1 Output OUT1A Output 1 ‘A’ Side of Motor Winding
2 Output OUT2A Output 2 ‘A’ Side of Motor Winding
3 Input SENSE2 Current Sense for Output 2
4 Input COMPIN2 Current Sense Comparator Input for Output 2
5 Output OUT2B Output 2 ‘B’ S ide of Motor Winding
6 Power GND Negative Logic Supply (Ground)
7 Power GND Negative Logic Supply (Ground)
8 Input I02 Output 2 Current Selection Bit 0
9 Input I12 Output 2 Current Selection Bit 1
10 Input PHASE2 Output 2 Phase
11 Input VREF2 Output 2 Current Reference
12 Input RC2 Output 2 RC Time Constant
13 Power VLOGIC Positive Logic Supply Voltage
14 Input RC1 Output 1 RC Time Constant
15 Input VREF1 Output 1 Current Reference
16 Input PHASE1 Output 1 Phase
17 Input I11 Output 1 Current Selection Bit 1
18 Power GND Negative Logic Supply (Ground )
19 Power GND Negative Logic Supply (Ground )
20 Input I01 Output 1 Current Selection Bit 0
21 Output OUT1B Output 1 ‘B’ Side of Motor Wi nding
22 Input COMPIN1 Current Sense Comparator Input for Output 1
23 Input SENSE1 Current Sense for Output 1
24 Power VLOAD Positive Load Supply Voltage
2010 Microchip Technology Inc. DS22260A-page 7
MTS62C19A
2.5 Current Flow Direction Selection
(PHASE1, PHASE2)
Logic input to select the direction of current flow
through the load. A “HIGH” logic signal level causes
load current to flow from OUTxA to OUTxB. A “LOW”
logic level causes load current to flow from OUTxB to
OUTxA.
2.6 Current Sense Reference (VREF1,
VREF2)
Reference voltage for current sense comparator.
Determines the level of output current detection
together with sensing resistor and inputs I0x, I1x.
2.7 Current Sense Input (SENSE1,
SENSE2)
Connection to lower sources of output stage for inser-
tion of current sense resistor.
2.8 Current Sense Comparator Input
(COMP IN1, COMPIN2)
Current sense comparator input.
2.9 Outp u t Stage OFF Time (RC1,
RC2)
A parallel RtCt network connected to this pin sets the
OFF tim e of the pow er transi stors. The pulse generator
is a monostable triggered by the output of the current
sense comparator.
2.10 Output S tage (OUT1A, OUT2A,
OUT1B, OUT2B)
Output connection to “A” side and “B” side of motor
windings.
MTS62C19A
DS22260A-page 8 2010 Microchip Technology Inc.
3.0 FUNCTIONAL DESCRIPTION
The circuit is designed to drive the two windings of a
bipolar stepper motor and can be divided in two identi-
cal channels (channel 1 and channel 2) and protection
circuitry for over temperature and undervoltage. The
functionality of a channel and protection circuitry is
presented on ne xt sections.
3.1 Power Bridge Operation
Each motor winding is driven by an H-type bridge
consis tin g o f two N an d t wo P t rans is tors th at all ow th e
current to flo w in both windi ng dire cti on s de pe ndi ng o n
the value of the PHASE signal (Table 3-1). The H-
bridg e c an be se t i n 5 co nfiguratio ns tha t a r e re lat ed to
the digital inputs PHASE, I0 and I1 and to the current
sensed. These configurations are given in Table 3-2.
FIGURE 3-1: Power bridge control (PHASE = H / forward): (a) bridge ON, (b) source OFF, and (c)
all OFF / coasting (for PHASE = L / reverse: invert A and B in drawings)
VLOAD
SENSE
Rs
H
H
L
L
OUTA OUTB
Na Nb
Pa Pb
VLOAD
SENSE
Rs
H
H
H
L
OUTA OUTB
Na Nb
Pa Pb
VLOAD
SENSE
Rs
H
L
H
L
OUTA OUTB
Na Nb
Pa Pb
a) b) c)
TABLE 3-1: CURRENT DIRECTION
CONTROL
Phase Output Current
L Current flows from OUTxB
to OUTxA
H Current flows from OUTxA
to OUTxB
TABLE 3-2: POWER BRIDGE GATE CONTROL TRUTH TABLE
I0I1 PHASE overi TOFF Case/Mode gna gpa gnb gpb
00/01/1 0 1 0 0 Forward ON L LHH
00/01/10 1 x 1 Forw ard OFF L H HH
00/01/10 0 0 0 Reverse ON HHLL
00/01/10 0 x 1 Reverse OFF HHLH
11 x x x No Current/
Coasting LHLH
Legend: Bold = Active MOS Transistors, Overi = Overcurrent flag, TOFF = Channel TOFF State Flag
2010 Microchip Technology Inc. DS22260A-page 9
MTS62C19A
3.2 PWM Current Contr ol
The curre nt level in each motor windi ng is co ntrolled b y
a PWM ci rc uit w ith a f ix e d 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.
FIGURE 3-2: PWM Current Control Circuit Principle (Channel 1 Shown)
The voltage across Rs is compared to a fraction of the
reference voltage VREF, chosen with the logic input
bits I0 and I1 (Table 3-3). The power bridge and thus
the load current can also be switched off completely
when both logic inputs are high. Note that any logic
input left unconnected will be treated as a high level
(pull-up resistor).
The max imum trip c urre nt fo r regu lation, gi ven for I0 I1
= 00 is calcu la ted in Equation 3-1.
EQUATION 3-1:
When the maximum allowed current is reached, the
bridge source is turned off during a fixed period TOFF
(typica lly 50u s) given by a non-r etriggerabl e pulse gen-
erator and the external timing components Rt (20k-
100 k range) and Ct (100 pF-1000 pF range):
toff = 1.1*(Rt*Ct)
During TOFF the winding current decreases. When the
driver is re-enabled, the winding current increases
again until it reaches the threshold, and the cycle
repeats itself maintaining the load current at the desired
level.
VLOAD
SENSE
Rs
OUTA
OUTB
Na Nb
Pa Pb
Pow er
Br idg e
One-Shot
RtCt
RC
COMPIN
Cc Rc
Source
Disable
I0
I1
VREF
÷10
S
REF
MAX R
V
I*10
TABLE 3-3: CURRENT LEVEL CONTROL TRUTH TABLE
I0 I1 Comp. Trip Voltage Output Current
0 0 Vtr ip = 1/10*Vref Imax = Vref/ 10RS
1 0 Vtrip = 1/15*Vref 2/3*Imax = Vref/15RS
0 1 Vtrip = 1/30*Vref 1/3*Imax = Vref/30RS
1 1 x 0 (no current)
MTS62C19A
DS22260A-page 10 2010 Microchip Technology Inc.
FIGURE 3-3: PWM Output Curr ent
Waveform
3.3 Circuit Protection
A th ermal pr otec tion cir cui try tur ns off all driv ers when
the junc tion tempe rature ex ceeds a safe operati ng limit
of 170°C (typ.). This protects the devices from failure
due to excessive heating. Despite this thermal protec-
tion, output short circuits are not permitted. The output
drivers are re-enabled once junction temperature has
dropped below 145°C (typ.).
FIGURE 3-4: Thermal Shutdown Output
vs. Temperature Showing Hysteresis
An undervoltage lockout circuit protects the
MTS62C19A from potential shoot-through currents
when the load supply voltage is applied prior to the
logic supply voltage. The power bridge and all outputs
are disabled if VLOGIC is smaller than 4V.
With this protection feature, the circuit will withstand
any order of turn-on or turn-off of the supply voltages
VLOGIC and VLOAD. Normal dV/dt values are
assumed.
PHASE
Iout +
0
-
IMAX
td toff
ton
0
1
145°C 170°C
thshtd_en
2010 Microchip Technology Inc. DS22260A-page 11
MTS62C19A
4.0 APPLICATION CIRCUITS &
ISSUES
4.1 Typical Application
The MTS62C19A circuit with external components for
a typical application is shown in Figure 4-1. Typical
pas siv e c om po nen t values a re: R s = 1, Rc = 1k, Cc
= 820pF, Rt = 56k and Ct = 820pF.
FIGURE 4-1: Typical App li ca tio n Circui t
During PWM operation, when the output stage is
turned-on, large voltage peaks might appear across
Rs, which can wrongly trigger the input comparator. To
avoid an unstable current control, an external RcCc fil-
ter should be used that delays the comparator action.
Depending on load type many applications will not
require this filter (SENSE connected to COMPIN).
MTS62C19A
DS22260A-page 12 2010 Microchip Technology Inc.
4.2 Stepping Examples
The MTS62C19A allows to control a motor in full-step,
half-step, modified half-step and microstepping mode,
as shown in Figure 4-2.
FIGURE 4-2: Examples of Stepping Modes Achievable with Typical Application Circuit
4.3 PCB Design Guidelines
Unused inputs should be connected to fixed voltage
levels in order to get the highest noise immunity. Typi-
cal PCB layou t guid eli ne s for pow e r appl ic ati on sh oul d
be followed. These include separate power ground
planes, supply decoupling capacitors close to the IC,
short connections and use of maximized copper areas
to improve thermal dissipat ion.
Moto r Curre nt
in Phase 1
Moto r Curre nt
in Phase 2
I01
I11
PHASE1
I02
I12
PHASE2
Full-Step
1234
Half-Step
12345678
M od ified Half-Ste p
123
4
5
6
7
8
+500mA
-500mA
+500mA
-500mA
+333mA
-333mA
+167mA
-167mA
0
0
5V
Mi cro-Stepping (1/8th)
VREF1
VREF2 5V 5V
1...
...32
0V
0V
5V
5V
2010 Microchip Technology Inc. DS22260A-page 13
MTS62C19A
5.0 MECHANICAL DIMENSIONS
SOP 24L Package Outline
E
H
112
1324
0.016 typ
0.5 typ
0.020X45°
D
A
A1
0.010
L
GAU G E PLANE
SEAT I NG PLANE
Symbol Minimum Typical Maximum Unit
A — — 2.642 (0.104) mm (inch)
A1 0.102 (0.004) — — mm (inch)
D 15.545 (0.612) 15.697 (0.6 18) 15.850 (0.624) mm (inch )
E 7.417 (0.292) 7. 518 (0.296) 7.595 ( 0.299) mm (inch)
H 10.287 (0.405) 10.464 (0.412) 10.643 (0.419) mm (inch)
L 0.533 (0.021) 0.787 (0.031) 1.041 (0.041) mm (inch)
J048°
Note 1: JEDEC outline: M0-119 AA
2: Dimensions “D” does not include mold flash, protrusions or gate burrs. Mold flash, protrusions
and gate burrs should not exceed 0.25mm (0.010inch) per side.
3: Dimensions “E” does not include inter-lead flash, or protrusions. Inter-lead flash and protrusions
shall not exceed 0.25mm (0.010 inch) per side.
MTS62C19A
DS22260A-page 14 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. DS22260A-page 15
MTS62C19A
APPENDIX A: REVISION HISTORY
Revision A (September 2010)
• Original Release of this D ocument.
MTS62C19A
DS22260A-page 16 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. DS22260A-page 17
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appli ca tions and t he like is provided only for your convenience
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Printed on recycled paper.
ISBN: 978-1-60932-535-0
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 f amily of products is one of t he m ost secure famili es of it s kind on t he m arket 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. All of these methods, to our
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DS22260A-page 18 2010 Microchip Technology Inc.
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Fax: 86-27-5980-5118
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Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
ASIA/PACIFIC
India - Bangalore
Tel: 91-80-3090-4444
Fax: 91-80-3090-4123
India - New Delhi
Tel: 91-11-4160-8631
Fax: 91-11- 4160-8632
India - Pune
Tel: 91-20-2566-1512
Fax: 91-20-2566-1513
Japan - Yokohama
Tel: 81-45-471- 6166
Fax: 81-45-471-6122
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
Taiwan - Hsin Chu
Tel: 886-3-6578-300
Fax: 886-3-6578-370
Taiwan - Kaohsiung
Tel: 886-7-213-7830
Fax: 886-7-330-9305
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
Thailand - Bangko k
Tel: 66-2-694-1351
Fax: 66-2-694-1350
EUROPE
Austria - Wels
Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
Denmark - Cop e nha gen
Tel: 45-4450-2828
Fax: 45-4485-2829
France - Paris
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-14 4-44
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08 -91
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
Worldwide Sales and Service
08/04/10