MPS EV6551-QB-00A User manual

EV6551-QB-00A
14V, 5A, H-Bridge Motor Driver
Evaluation Board
EV6551-QB-00A Rev. 1.0 MonolithicPower.com 1
3/9/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2021 MPS. All Rights Reserved.
DESCRIPTION
The EV6551-QB-00A is an evaluation board
designed to demonstrate the capabilities of the
MP6551, an H-bridge motor driver.
The MP6551 provides up to 5A of output
current across a wide 2.5V to 14V input voltage
range. Its input control signals are applied via a
connector on the evaluation board (EN1, EN2,
IN1, and IN2).
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Input voltage VIN 2.5 to 14 V
Maximum output
current IOUT_MAX 5 A
Reference voltage VREF 3.3 V
3P3 voltage V3P3 3.3 V
FEATURES
 Wide 2.5V to 14V Input Supply Range
 Up to 5A Output Current (IOUT)
 Integrated Bidirectional Current-Sense
Amplifiers
 Supports 100% Duty Cycle Operation
 Low-Power Sleep Mode
 Over-Current Protection (OCP)
 Over-Temperature Protection (OTP)
 Fault-Indicating Output
APPLICATIONS
 Mini Drones
 Battery-Powered Toys
A
ll MPS parts are lead-free, halogen-free, and adhere to the RoHS
directive. For MPS green status, please visit the MPS website unde
r
Quality Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are
trademarks of Monolithic Power Systems, Inc. or its subsidiaries.
EV6551-QB-00A EVALUATION BOARD
LxW (5.08cmx5.08cm)
Board Number MPS IC Number
EV6551-QB-00A MP6551GQB

EV6551-QB-00A – 14V, 5A, H-BRIDGE MOTOR DRIVER EVALUATION BOARD
EV6551-QB-00A Rev. 1.0 MonolithicPower.com 2
3/9/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2021 MPS. All Rights Reserved.
QUICK START GUIDE
1. Preset the power supply between 2.5V and 14V, then turn off the power supply.
2. Connect the power supply terminals to:
a. Positive (+): VIN
b. Negative (-): GND
3. After making the connections, turn on the power supply.
4. Apply a 3.3V constant voltage to the 3P3 pin.
5. To set the current-sense reference voltage (VREF), apply a 3.3V constant voltage to the VREF pin.
6. Connect the input control signals (generated by the external controller) to the ENx and INx pins.
7. Adjust the HS-FET turn-on/off speed via resistor RV1. The lower the resistance, the faster the HS-
FET turn-on/off speed.

EV6551-QB-00A – 14V, 5A, H-BRIDGE MOTOR DRIVER EVALUATION BOARD
EV6551-QB-00A Rev. 1.0 MonolithicPower.com 3
3/9/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2021 MPS. All Rights Reserved.
EVALUATION BOARD SCHEMATIC
VIN
3P3
GND
4.99kΩ
R2
CM1 CM2
VREF
GND
499Ω
R1
12
LED 1
GND
VIN
12
4
70μF/25V
C3
V
IN
VIN
V
IN_GND
GND
3P3 3P3_GND
GND
V
REF
V
REF_GND
VREF
GND
OUT1
OUT1
OUT2
OUT2 EN1 IN1 EN2 IN2
CM1
CM1
CM2
CM2
2 1
100nF/25V
C8
GND
2 1
100nF/25V
C9
GND
NFAULT
NFAULT
NFAULT
3P3
NS
1 2
D1
GND
VIN
EN1 IN1 EN2 IN2
NFAULT
12
IN1
13
EN1
14
IN2
5
EN2
4
SR
6
GND
9
CM2 7
CM1 11
OUT2 8
OUT2 3
OUT1 10
VIN 2
OUT1 1
N
F
A
U
F
F
L
T
I
N
1
E
N
1
I
N
2
E
N
2
S
R
G
N
D
C
M
2
C
M
1
O
U
T
2
O
U
T
2
O
U
T
1
V
I
N
O
U
T
1
U1
MP6551
OUT1
OUT2
CM1
CM2
IN1
IN2
EN1
EN2
RV1
500kΩ
GND
SR
SR
SR
21
100nF/25V
C2
21
10μF/25V
C1
4.99kΩ
R5
4.99kΩ
R3
4.99kΩ
R4
Figure 1: Evaluation Board Schematic

EV6551-QB-00A – 14V, 5A, H-BRIDGE MOTOR DRIVER EVALUATION BOARD
EV6551-QB-00A Rev. 1.0 MonolithicPower.com 4
3/9/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2021 MPS. All Rights Reserved.
EV6551-QB-00A BILL OF MATERIALS
Qty Ref Value Description Package Manufacturer Manufacturer PN
1 R1 499Ω Film resistor, 1% 0603 Yageo RC0603FR-07499RL
4 R2, R3, R4,
R5 4.99kΩ Film resistor, 1% 0603 Yageo RC0603FR-074K99L
1 RV1 500kΩ Square trimming
potentiometer DIP Bourns 3266W-1-504LF
1 C1 10μF Ceramic capacitor,
25V, X5R 1210 TDK C3225X5R1E106K
3 C2, C8, C9 100nF Ceramic capacitor,
25V, X8R 0603 Murata GCM188R91E104KA37D
1 C3 470μF Electrolytic capacitor,
25V DIP Jianghai CD287-25V470
1 LED Red LED 0805 Bright LED BL-HUE35A-AV-TRB
1 D1 NS
1 U1 MP6551 14V, 5A, H-bridge
motor driver
QFN-14
(2.5mmx3mm) MPS MP6551GQB
4
VIN,
VIN_GND,
OUT1, OUT2
2mm Connector, Φ = 2mm
needle DIP Any
12
SR, EN1, IN1,
EN2, IN2,
NFAULT, 3P3,
CM1, CM2,
VREF, GND,
GND
1mm Connector, Φ = 1mm
needle DIP Any

EV6551-QB-00A – 14V, 5A, H-BRIDGE MOTOR DRIVER EVALUATION BOARD
EV6551-QB-00A Rev. 1.0 MonolithicPower.com 5
3/9/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2021 MPS. All Rights Reserved.
PCB LAYOUT
Figure 2: Top Silk Figure 3: Top Layer
Figure 4: Bottom Layer

EV6551-QB-00A – 14V, 5A, H-BRIDGE MOTOR DRIVER EVALUATION BOARD
Notice: The information in this document is subject to change without notice. Please contact MPS for current specifications.
Users should warrant and guarantee that third-party Intellectual Property rights are not infringed upon when integrating MPS
products into any application. MPS will not assume any legal responsibility for any said applications.
EV6551-QB-00A Rev. 1.0 MonolithicPower.com 6
3/9/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2021 MPS. All Rights Reserved.
REVISION HISTORY
Revision # Revision Date Description Pages Updated
1.0 3/9/2021 Initial Release -