Document Number: MPC17531A
Rev. 10.0, 7/2016
NXP Semiconductors
Technical Data
© 2016 NXP B.V.
700 mA dual H-Bridge motor driver
with 3.0 V compatible logic I/O
The 17531A is a monolithic dual H-Bridge power IC ideal for portable electronic
applications containing bipolar step motors and/or brush DC motors (e.g.,
cameras and disk drive head positioners).
The 17531A operates from 2.0 to 8.6 V using the internal charge pump, with
independent control of each H-Bridge, via a parallel MCU interface. The device
features built-in shoot-through current protection and an undervoltage shutdown
function.
The 17531A has four operating modes: Forward, Reverse, Brake, and Tri-state
(high-impedance). The 17531A has a low total RDS(on) of 1.2 Ω (max at 25 °C).
The 17531A efficiently drives many types of micromotors with low power
dissipation owing to its low output resistance and high output slew rates. The H-
Bridge outputs can be independently pulse width modulated (PWM’ed) at up to
200 kHz for speed/torque and current control.
This device is powered by SMARTMOS technology.
Features
Low total RDS(on) 0.8 Ω (Typ), 1.2 Ω (Max) at 25 °C
Output current 0.7 A (DC)
Shoot-through current protection circuit
PWM control input frequency up to 200 kHz
Built-in charge pump circuit
Low power consumption
Undervoltage detection and shutdown circuit
Power save mode with current draw 2.0 μA
Figure 1. 17531A Simplified application diagram
DUAL H-BRIDGE
EV SUFFIX (PB-FREE)
98ASA10616D
20-PIN VMFP
17531A
EP SUFFIX (PB-FREE)
98ASA00474D
24-PIN QFN
Bottom View
EJ SUFFIX (PB-FREE)
98ASA00887D
20-PIN TSSOP
WITH EXPOSED PAD
C2H
3.0 V
CRES
IN1A
LGND
VM1
VDD
OUT1A
OUT1B
OUT2A
OUT2B
Bipolar
MCU
MPC17531A
IN1B
IN2A
IN2B
PSAVE
C2L
C1H
C1L
5.0 V
N
S
Step
Motor
PGND1,2
VM2
5.0 V
2NXP Semiconductors
17531A
ORDERABLE PARTS
Orderable parts
Table 1. Orderable part variations (1)
Part number Temperature (TA)Package
MPC17531ATEP
-20 °C to 65 °C
24 QFN
MPC17531ATEV/EL (2) 20 VMFP
MPC17531ATEJ 20 TSSOP (exposed pad)
Notes
1. To order parts in Tape & Reel, add the R2 suffix to the part number.
2. Not recommended for new designs.
NXP Semiconductors 3
17531A
INTERNAL BLOCK DIAGRAM
Internal block diagram
Figure 2. 17531A Simplified internal block diagram
VM1
OUT2B
OUT2A
OUT1A
PGND2
IN1A
C2H
IN1B
C1H
C2L
C1L
VDD Shutdown
Charge
Level Shifter
VM2
OUT1B
IN2A
IN2B
PSAVE
LGND
PGND1
Control
Predriver
Pump
Low-voltage
H-Bridge
H-Bridge
Logic
CRES
V
DD
4NXP Semiconductors
17531A
PIN CONNECTIONS
Pin connections
Figure 3. Pin connections
A functional description of each pin can be found in the Functional Pin Description section beginning on page 9.
Table 2. 17531A, pin definitions
Pin number
20-Pin VMFP,
20-Pin TSSOP
Pin number
24-Pin QFN Pin name Formal name Definition
122 VDD Logic Supply Control circuit power supply pin.
223 IN1A Logic Input Control 1A Logic input control of OUT1A (refer to Table 6, Truth table, page 8).
324 IN1B Logic Input Control 1B Logic input control of OUT1B (refer to Table 6, Truth table, page 8).
4 2 PSAVE Power Save Logic input controlling power save mode.
5 3 OUT2A H-Bridge Output 2A Output A of H-Bridge channel 2.
6 4 PGND1 Power Ground 1 High-current power ground 1.
7 5 OUT1A H-Bridge Output 1A Output A of H-Bridge channel 1.
8 8 VM1 Motor Drive Power Supply 1 Positive power source connection for H-Bridge 1 (Motor Drive Power Supply).
9 9 CRES Predriver Power Supply Internal triple charge pump output as predriver power supply.
10 10 C2H Charge Pump 2H Charge pump bucket capacitor 2 (positive pole).
11 11 C1H Charge Pump 1H Charge pump bucket capacitor 1 (positive pole).
12 12 C1L Charge Pump 1L Charge pump bucket capacitor 1 (negative pole).
13 13 C2L Charge Pump 2L Charge pump bucket capacitor 2 (negative pole).
14 14 OUT1B H-Bridge Output 1B Output B of H-Bridge channel 1.
15 15 PGND2 Power Ground 2 High-current power ground 2.
16 16 OUT2B H-Bridge Output 2B Output B of H-Bridge channel 2.
17 17 VM2 Motor Drive Power Supply 2 Positive power source connection for H-Bridge 2 (Motor Drive Power Supply).
18 19 IN2B Logic Input Control 2B Logic input control of OUT2B (refer to Table 6, Truth table, page 8).
19 20 IN2A Logic Input Control 2A Logic input control of OUT2A (refer to Table 6, Truth table, page 8).
20 21 LGND Logic Ground Low-current logic signal ground.
N/A 1, 6, 7, 17 NC No Connect
- N/A - - Exposed pad on 20-Pin TSSOP
20-Pin VMFP and 20-Pin TSSOP
1
2
3
4
5
6789101112
13
14
15
16
17
18
192021222324
NC
NC
NC
NC
IN1A
IN1B
PSAVE
OUT2A
PGND1
OUT1A
VM1
CRES
C2H
C1H
C1L
C2L
OUT1B
PGND2
OUT2B
VM2
IN2B
IN2A
LGND
VDD
24-Pin QFN
Transparent
top view
VDD
IN1A
IN1B
PSAVE
OUT2A
PGND1
OUT1A
VM1
CRES
C2H
LGND
IN2A
IN2B
PGND2
OUT1B
C2L
C1L
CIH
VM2
OUT2B
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
NXP Semiconductors 5
17531A
ELECTRICAL CHARACTERISTICS
Electrical characteristics
Maximum ratings
Table 3. Maximum ratings
All voltages are with respect to ground, unless otherwise noted. Exceeding these ratings may cause a malfunction or permanent damage
to the device.
Symbol Ratings Value Unit Notes
VMMotor Supply Voltage -0.5 to 11.0 V
VCRES Charge Pump Output Voltage -0.5 to 14.0 V
VDD Logic Supply Voltage -0.5 to 5.0 V
VIN Signal Input Voltage -0.5 to VDD
+ 0.5 V
IO
IOPK
Driver Output Current
• Continuous
• Peak
0.7
1.4
A(3)
VESD1
VESD2
ESD Voltage
• Human Body Model
• Machine Model
±1200
± 150
V(4)
TJOperating Junction Temperature -20 to 150 °C
TAOperating Ambient Temperature -20 to 65 °C
TSTG Storage Temperature Range -65 to 150 °C
RθJA Thermal Resistance 50 °C/W (5)
PD
Power Dissipation
• WMFP
• QFN
1.0
2.5
W(6)
TSOLDER Pin Soldering Temperature 260 °C(7)
TPPRT Peak Package Reflow Temperature During Reflow Note 8 °C (7), (8)
Notes
3. TA
= 25 °C, 10 ms pulse width at 200 ms intervals.
4. ESD1 testing is performed in accordance with the Human Body Model (CZAP = 100 pF, RZAP = 1500 Ω), ESD2 testing is performed in accordance
with the Machine Model (CZAP = 200 pF, RZAP = 0 Ω).
5. QFN24: 45 x 30 x 1 [mm] glass EPOXY board mount. (See: recommended heat pattern) VMFP16: 37 x 50 x 1.6 [mm] glass EPOXY board mount.
When the exposed pad is bonded, Rsj is not performed.
6. Maximum at TA
= 25 °C. When the exposed pad is bonded, Rsj is not performed.
7. Pin soldering temperature limit is for 10 seconds maximum duration. Not designed for immersion soldering. Exceeding these limits may cause
malfunction or permanent damage to the device.
8. NXP’s Package Reflow capability meets Pb-free requirements for JEDEC standard J-STD-020C. For Peak Package Reflow Temperature and
Moisture Sensitivity Levels (MSL), Go to www.NXP.com, search by part number [e.g. remove prefixes/suffixes and enter the core ID to view all
orderable parts. (i.e. MC33xxxD enter 33xxx), and review parametrics.
6NXP Semiconductors
17531A
ELECTRICAL CHARACTERISTICS
Static electrical characteristics
Table 4. Static electrical characteristics
Characteristics noted under conditions TA = 25 °C, VDD = 3.0 V, VM = 5.0 V, GND = 0 V, unless otherwise noted. Typical values noted
reflect the approximate parameter means at TA = 25 °C under nominal conditions, unless otherwise noted.
Symbol Characteristic Min. Typ. Max. Unit Notes
Power input
VM-CP Motor Supply Voltage (Using Internal Charge Pump) 2.0 5.0 8.6 V(9)
VM-NCP Motor Supply Voltage (VCRES Applied Externally) 10 V(10)
VCRES - VM Gate Drive Voltage - Motor Supply Voltage (VCRES Applied Externally) 5.0 6.0 V (11)
VDD Logic Supply Voltage 2.7 3.0 3.6 V
IQM
IQM-PSAVE
Driver Quiescent Supply Current
• No Signal Input
• Power Save Mode
100
1.0
μA
IQVDD
IQVDD-PSAVE
Logic Quiescent Supply Current
• No Signal Input
• Power Save Mode
1.0
1.0
mA
μA
(12)
I
VDD
ICRES
Operating Power Supply Current
• Logic Supply Current
• Charge Pump Circuit Supply Current
3.0
0.7
mA (13)
(14)
VDDDET Low VDD Detection Voltage 1.0 1.6 2.5 V(15)
RDS(ON) Driver Output ON Resistance 0.8 1.2 Ω(16)
Gate drive
VCRES
Gate Drive Voltage
• No Current Load 12 13 13.5 V(14)
VCRESLOAD
Gate Drive Ability (Internally Supplied)
ICRES = -1.0 mA 8.5 9.2 V
CCP
Recommended External Capacitance (C1L C1H, C2L C2H, CRES
GND) 0.01 0.1 1.0 μF
Control logic
VIN Logic Input Voltage 0 VDD V
VIH
VIL
IIH
IIL
IIL- PSAVE
Logic Inputs (2.7 V < VDD
< 3.3 V)
• High Level Input Voltage
• Low Level Input Voltage
• High Level Input Current
• Low Level Input Current
PSAVE Pin Input Current Low
VDD
x 0.7
-1.0
50
VDD
x 0.3
1.0
100
V
V
μA
μA
μA
Notes
9. Gate drive voltage VCRES is generated internally. 2 x VDD + VM must be < VCRES MAX (13.5 V).
10. No internal charge pump used. VCRES is applied from an external source.
11. RDS(ON) is not guaranteed if VCRES - VM < 5.0 V. Also, function is not guaranteed if VCRES - VM < 3.0 V.
12. IQVDD includes the current to pre-driver circuit.
13. I
VDD includes the current to predriver circuit at fIN = 100 kHz.
14. At fIN = 20 kHz.
15. Detection voltage is defined as when the output becomes high-impedance after VDD drops below the detection threshold. VCRES is applied from
an external source. 2 x VDD + VM must be < VCRES MAX (13.5 V).
16. IO = 0.7 A source + sink.
NXP Semiconductors 7
17531A
ELECTRICAL CHARACTERISTICS
Dynamic electrical characteristics
Timing diagrams
Figure 4. tPLH, tPHL, and tPZH timing
Figure 5. Low voltage detection timing
Table 5. Dynamic electrical characteristics
Characteristics noted under conditions TA = 25 °C, VDD = 3.0 V, VM = 5.0 V, GND = 0 V, unless otherwise noted. Typical values noted
reflect the approximate parameter means at TA = 25 °C under nominal conditions, unless otherwise noted.
Symbol Characteristic Min. Typ. Max. Unit Notes
Input
f
IN Pulse Input Frequency 200 kHz
t
RInput Pulse Rise Time 1.0 (18) μs(17)
t F Input Pulse Fall Time 1.0 (18) μs(19)
Output
t
PLH
t
PHL
Propagation Delay Time
• Turn-ON Time
• Turn-OFF Time
0.1
0.1
0.5
0.5
μs(20)
t
VGON Charge Pump Wake-up Time 1.0 3.0 ms (21)
t
VDDDET Low Voltage Detection Time 10 ms
Notes
17. Time is defined between 10% and 90%.
18. That is, the input waveform slope must be steeper than this.
19. Time is defined between 90% and 10%.
20. Output load is 8.0 Ω DC.
21. CCP = 0.1 μF.
10%
50%
OUTA,
OUTB
90%
tPLH tPHL
IN1,
IN2,
PSAVE
tVDDDET
0%
VDD
IM
50%
tVDDDET
0.8 V
2.5 V
VDDDETon VDDDEToff
90%
(<1.0 μA)
8NXP Semiconductors
17531A
ELECTRICAL CHARACTERISTICS
Figure 6. Charge pump timing
Table 6. Truth table
INPUT OUTPUT
Charge pump and low
voltage detector
PSAVE IN1A
IN2A
IN1B
IN2B
OUT1A
OUT2A
OUT1B
OUT2B
L L L L L RUN
L H L H L RUN
L L H L H RUN
L H H Z Z RUN
H X X Z Z STOP
H = High.
L = Low.
Z = High-impedance.
X = Don’t care.
PSAVE pin is pulled up to VDD with internal resistance.
t
VGON
V
DD
V
C
RES
11 V
NXP Semiconductors 9
17531A
FUNCTIONAL DESCRIPTION
Functional description
Introduction
The 17531A is a monolithic dual H-Bridge ideal for portable electronic applications to control bipolar step motors and brush DC motors,
such as those found in camera lens assemblies, camera shutters, and optical disk drives. The device features an on-board charge pump,
as well as built-in shoot-through current protection and under-voltage shutdown.
The 17531A has four operating modes: Forward, Reverse, Brake, and Tri-state (high-impedance). The MOSFETs comprising the output
bridge have a total source + sink RDS(ON) 1.2 Ω. The 17531A can simultaneously drive two brush DC motors or one bipolar step motor.
The drivers are designed to be PWMed at frequencies up to 200 kHz.
Functional pin description
Logic supply (VDD)
The VDD pin carries the logic supply voltage and current into the logic sections of the IC. VDD has an undervoltage threshold. If the supply
voltage drops below the undervoltage threshold, the output power stage switches to a tri-state condition. When the supply voltage returns
to a level that is above the threshold, the power stage automatically resumes normal operation according to the established condition of
the input pins.
Logic input control (IN1A, IN1B, IN2A, and IN2B)
These logic input pins control each H-Bridge output. IN1A logic HIGH = OUT1A HIGH. However, if all inputs are taken HIGH, the outputs
bridges are both tri-stated (refer to Table 6, Truth table, page 8).
Power save (PSAVE)
The PSAVE pin is a HIGH = TRUE power save mode input. When PSAVE = HIGH, all H-Bridge outputs (OUT1A, OUT1B, OUT2A, and
OUT2B) are tri-stated (High-Z), regardless of logic inputs (IN1A, IN1B, IN2A, and IN2B) states, and the internal charge pump and low
voltage detection current are shut off to save power.
H-Bridge output (OUT1A, OUT1B, OUT2A, and OUT2B)
These pins provide connection to the outputs of each of the internal H-Bridges (see Figure 2, 17531A Simplified internal block diagram,
page 3).
Motor drive power supply (VM1 and VM2)
The VM pins carry the main supply voltage and current into the power sections of the IC. This supply then becomes controlled and/or
modulated by the IC as it delivers the power to the loads attached between the OUTput pins. All VM pins must be connected together on
the printed circuit board.
Charge pump (C1L and C1H, C2L and C2H)
These two pairs of pins, the C1L and C1H, and the C2L and C2H, connect to the external bucket capacitors required by the internal charge
pump. The typical value for the bucket capacitors is 0.1 μF.
Predriver power supply (CRES)
The CRES pin is the output of the internal charge pump. Its output voltage is approximately three times of VDD voltage. The VCRES voltage
is power supply for the internal predriver circuit of H-Bridges.
Power ground (PGND)
Power ground pins. They must be tied together on the PCB.
Logic ground (LGND)
Logic ground pin.
10 NXP Semiconductors
17531A
TYPICAL APPLICATIONS
Typical applications
Figure 7 shows a typical application for the 17531A. When applying the gate voltage to the CRES pin from an external source, be sure to
connect it via a resistor equal to or greater than RG = VCRES / 0.02 Ω.
The internal charge pump of this device is generated from the VDD supply; therefore, care must be taken to provide sufficient gate-source
voltage for the high side MOSFETs when VM >> VDD (e.g., VM = 5.0 V, VDD = 3.3 V), in order to ensure full enhancement of the high side
MOSFET channels.
Figure 7. 17531A typical application diagram
CEMF snubbing techniques
Care must be taken to protect the IC from potentially damaging CEMF spikes induced when commutating currents in inductive loads.
Typical practice is to provide snubbing of voltage transients via placing a capacitor or zener at the supply pin (VM) (see Figure 8).
PCB layout
When designing the printed circuit board (PCB), connect sufficient capacitance between power supply and ground pins to ensure proper
filtering from transients. For all high current paths, use wide copper traces and the shortest possible distances.
Figure 8. CEMF snubbing techniques
MCU
17531A
3.3 V
GND
C1L
C1H
C2L
C2H
CRES
IN1B
IN2A
IN2B
PSAVE
VM
VDD
OUT1B
OUT2B
OUT1A
IN1A
OUT2A
5.0 V
NC
NC
NC
NC
VCRES < 14 V
RG > VCRES/0.02 Ω
0.01 μF
RG
NC = No Connect
17531A
GND
C1L
C1H
C2L
C2H
CRES
VM
VDD
OUT
OUT
17531A
3.3 V
GND
C1L
C1H
C2L
C2H
CRES
VM
VDD
OUT
OUT
5.0 V
3.3 V 5.0 V
NXP Semiconductors 11
17531A
PACKAGING
Packaging
Package dimensions
For the most current package revision, visit www.NXP.com and perform a keyword search using the “98A” drawing number listed.
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17531A
REVISION HISTORY
Revision history
Revision Date Description of changes
2.0 9/2005 Implemented Revision History page
Converted to Freescale format
3.0 2/2008 Corrected Table 2, Pin Definitions on page 4
4.0 5/2009 Corrected Note 7, in Static Electrical Characteristics table
5.0 10/2013
Updated package drawings
Corrected ordering information table to MPC17531ATEP and MPC17531ATEV/EL
Added new back page and document properties
6.0 10/2013 Corrected packaging information on page 1
7.0 11/2014 Changed the QFN 98A to 98ASA00474D per PCN 16331
Corrected errors in ordering information
8.0 3/2015 Corrected unit typo for Logic Quiescent Supply Current
9.0
7/2015
Added 98ASA00887D package information and updated tables where applicable
Added MPC17531ATEJ to the ordering information
Updated as per PCN # 16724
8/2015 Corrected the 98A package information for 20-pin TSSOP
10.0
10/2015
Added EP notation for TSSOP package.
Fixed notations for TSSOP in Orderable parts and Pin connections.
Updated Packaging 98A drawing for TSSOP
7/2016 Updated to NXP document form and style
Information in this document is provided solely to enable system and software implementers to use NXP products.
There are no expressed or implied copyright licenses granted hereunder to design or fabricate any integrated circuits
based on the information in this document. NXP reserves the right to make changes without further notice to any
products herein.
NXP makes no warranty, representation, or guarantee regarding the suitability of its products for any particular
purpose, nor does NXP assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation, consequential or incidental damages. "Typical"
parameters that may be provided in NXP data sheets and/or specifications can and do vary in different applications,
and actual performance may vary over time. All operating parameters, including "typicals," must be validated for each
customer application by the customer's technical experts. NXP does not convey any license under its patent rights nor
the rights of others. NXP sells products pursuant to standard terms and conditions of sale, which can be found at the
following address:
http://www.nxp.com/terms-of-use.html.
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© 2016 NXP B.V.
Document Number: MPC17531A
Rev. 10.0
7/2016