Rohm BD16950EFV-EVK-001 User manual

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© 2021 ROHM Co., Ltd.
No. 63UG103E Rev.002
2023.12
User’s Guide
Automotive Power and Motor Drive
Evaluation Kit for Automotive 2-Channel
Half-Bridge Gate Driver IC
BD16950EFV-EVK-001
The ROHM BD16950EFV-C is an AEC-Q100 automotive qualified 2-channel Half-Bridge Gate Driver IC, suitable for DC motor drive
in Automotive applications such as Power Window Lifter, Sunroof Module, Wiper, Seat belt tensioner, Seat positioning, 2H motors etc.
This EVK enables the performance evaluation of this IC in research and development laboratories.
ٴ Description
This EVK consists of an evaluation board for the Automotive 2-
channel Half-Bridge Driver IC and USB cable. Also a GUI can be
provided by ROHM for easy SPI register configuration.
The key component of the evaluation board is the ROHM
BD16950EFV-C which is an AEC-Q100 automotive qualified 2-
channel Half-Bridge Gate Driver, controlled by an external MCU
through a 16-bit Serial Peripheral Interface (SPI). Independent
control of low-side and high-side N-MOSFETS allows for several
MCU controlled modes. A programmable drive current is
available to adjust slew-rates, in order to meet EMI and power
dissipation requirements. Diagnostics can be read and reset by
an external MCU.
Besides this motor driver IC the evaluation board contains all
external components necessary for operation including a full
bridge created by discrete FETs, an LDO for logic supply, SPI
interface and various test points for signal monitoring.
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䖃 BD16950EFV-C Key Specifications
¾ Wide Input voltage range…………………...5.5 to 40V
¾ Gate Drive Voltage (Half Bridge) …..………..…….11V
¾ VS quiescent㻌supply current...............................0 μA
¾ VCC quiescent supply current …………….……..2 μA
¾ Integrated Charge Pump Frequency ……..…500 kHz
¾ Programmable Parameters..…...…..SPI (7 MHz max)
䖃 EVK Features
¾ Plug & Play DC Motor Evaluation Kit
¾ No need for driver installation due to GUI design as
Human Interface Device
¾ Single Power Supply with Reverse Polarity Protection
¾ On Board Logic Supply by LDO or USB
¾ Discrete H-Bridge FETs with high current capability
¾ Test pins for easy signal monitoring

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© 2021 ROHM Co., Ltd.
No. 63UG103E Rev.002
2023.12
User’s Guide
BD16950EFV-EVK-001
Contents
1. Introduction .............................................................................................................................................. 3
2. Safety Instructions ..................................................................................................................................... 3
2.1 Warnings .............................................................................................................................................. 3
2.2 Instructions for Safe Use........................................................................................................................... 4
3. Hardware Description ................................................................................................................................. 5
3.1 Schematic ............................................................................................................................................. 5
3.2 PCB Layout and Component Placement ....................................................................................................... 6
3.3 Bill of Materials....................................................................................................................................... 7
4. Operating Instructions ................................................................................................................................. 8
4.1 Hardware.............................................................................................................................................. 8
4.2 Software ............................................................................................................................................... 9

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© 2021 ROHM Co., Ltd.
No. 63UG103E Rev.002
2023.12
User’s Guide
BD16950EFV-EVK-001
1. Introduction
This evaluation kit (EVK) manual describes the usage of ROHM’s BD16950EFV-EVK-001. The purpose of the EVK is to allow the test
and evaluation of the motor driver IC BD16950EFV-C in professional research and development environments. This document
provides guidelines to quickly setup the hardware and software for fast and easy motor driver IC performance evaluation.
•BD16950EFV-C evaluation board
•USB cable
For operation of the EVK the following additional items will be required:
•BD16950EFV-C GUI control software (MS Windows)
•PC with operating system Windows 7 or higher
•Laboratory DC power supply
•Load (e.g. Brush DC motor)
•Connecting cables
For receiving the BD16950EFV-C GUI control software please get in touch with your local ROHM sales office or use the general
ROHM customer support system.
2. Safety Instructions
2.1Warnings
▪This evaluation kit must only be operated by trained professionals.
▪This evaluation kit should be operated in a well ventilated environment and, if used inside a case, the case should not
be covered.
▪This evaluation kit should be placed on a stable, flat, non-conductive surface in use and should not be contacted by
conductive items.
▪All peripherals used with the evaluation kit should comply with relevant standards for the country of use and be marked
accordingly to ensure that safety and performance requirements are met.
▪Where peripherals are connected that do not include the cable or connector, the cable or connector used must offer
adequate insulation and operation in order that the requirements of the relevant performance and safety are met.
▪The connection of incompatible devices to the evaluation kit may affect compliance or result in damage to the unit and
invalidate the warranty.

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User’s Guide
BD16950EFV-EVK-001
2.2Instructions for Safe Use
▪Do not expose the evaluation kit to water, moisture or place on a conductive surface whilst in operation.
▪Take care whilst handling to avoid mechanical or electrical damage to the printed circuit board and components.
▪Avoid handling the printed circuit board while it is powered. Only handle by the edges to minimize the risk of electrostatic
discharge damage.
▪Do not short any outputs to each other, to the supply or to GND.
▪Do not operate the evaluation kit outside its specified ratings.
▪Take care to monitor the PCB and IC temperatures in particular when operating with high power loads and do not exceed
the absolute maximum ratings of all components.

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2023.12
User’s Guide
BD16950EFV-EVK-001
3. Hardware Description
3.1Schematic
Figure 1: Evaluation Board Schematic
BD16950EFV-C

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BD16950EFV-EVK-001
3.2PCB Layout and Component Placement
Please note that the layout of this EVK is not optimized in terms of thermal performance or signal routing.
The focus is more on enabling easy test by adding test points to each signal.
Figure 2: TOP side PCB layout pattern Figure 3: TOP side component placement
Figure 4: BOTTOM side PCB layout pattern Figure 5: BOTTOM side component placement
(as seen from TOP side) (as seen from TOP side)

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3.3Bill of Materials
Comp. Name
Description
Type
Quantity
C1, C4, C5, C6, C7,
C9, C10, C13, C14,
C15
100 nF, 50 V 0805 X7R
Capacitor, Surface Mount
10
C2
330 µF, 50 V 5x10
Aluminum Electrolytic Capacitor
1
C3
1 µF, 50V 1206 X7R
Capacitor, Surface Mount
1
C8
220 µF, 50 V 10x16
Aluminum Electrolytic Capacitor
1
C11, C12
1 µF
Capacitor, Surface Mount
2
C16
10 µF
Capacitor, Surface Mount
1
C17
100 µF
Capacitor, Surface Mount
1
CN2, CN3
Blue Connector
Connector
2
CN4
TAG_Connect
Connector
1
CN5
MINI_USB
Connector
1
D1
EDZ16B/ROHM, SOD-523 16V,150 mW
Diode, Surface Mount
1
D2
BAS16VV/NXP, SOT-666
100 V, 200 mA
Diode, Surface Mount
1
J1, J9, J10, J11, J12,
J13
Solder Connection, closed
Jumper, Surface Mount
6
J2, J14
Solder Connection, closed
Jumper, Surface Mount
2
J3, J4, J5, J7, J8, J15,
J16
1x2 Pin Header, Through Hole
1x2 Pin Header, Through Hole
7
J6
1x3 Pin Header, Through Hole
1x3 Pin Header, Through Hole
1
Q1, Q2, Q3, Q4, Q6
RQ3G270BL
Nch MOSFET
5
Q5
BC846 NXP, SOT23
Transistor, Surface Mount
1
R1
10 kΩ, 0805
Chip Resistor, Surface Mount
1
R2, R3, R4, R5, R6
0 Ω, 1210
Chip Resistor, Surface Mount
5
R7
33 kΩ, 0805
Chip Resistor, Surface Mount
1
R8, R9
22 kΩ, 0805
Chip Resistor, Surface Mount
2
All Testpins
Probe Ring
Test Pin, Through Hole
30
U1
BD16950EFV-C
ROHM Motor Driver
1
U2
BD450M2FP3-C
ROHM LDO Regulator IC
1
Table 1: Evaluation Board Bill of Materials

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User’s Guide
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4. Operating Instructions
4.1Hardware
Please connect a DC laboratory source to the connector CN2 of the evaluation board. The pins are labelled with “BATT+” and “BATT-
“. Although reverse battery protection is included on the evaluation board please take care about the proper polarity in order not to
stress the components. Since in final application the IC is operated by a car battery the typical supply voltage of this EVK is 13.5V.
Although the maximum operating supply voltage of the motor driver IC BD16950EFV-C is 40V it is also the absolute maximum value
of the IC and external MOSFETs. So if you use higher supply voltage than typical please make sure to include enough margin for
fluctuation or voltage spikes to never exceed the absolute maximum ratings.
Please operate the EVK at room temperature only.
The maximum load current is limited by thermal performance of the components. For example with the typical SPI register settings
(see chapter 4.2, Table 3) and a load current of 4.5A the transistor Q4 surface temperature was 50°C.
Please take care to measure the temperature of the EV board components when applying your desired settings and load.
The EVK has some Jumpers for signal configuration. By default the Jumpers should be in the position as described below and typically
do not need to be changed.
Name
Typical Position
Description
J1, J2,
J9-14
closed (hard wired)
These power and signal lines are hard connected by solder and should only be
opened for test purposes.
J3, J4, J5
closed
Must be closed to connect PWM1, PWM2 and RSTB to the SPI controller
J6
closed middle pin to
bottom pin
Selects USB 5V instead of LDO 5V supply as logic supply
J7
closed
Connects logic supply to BD16950EFV-C
J8
open
Can hardwire the RSTB pin to VCC. Typically not required
J15
closed
Feedback of low side transistors source to BD16950EFV-C
J16
closed
Don’t care. Different GND signals are hard-connected anyway.
Table 2: Typical Jumper configuration

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User’s Guide
BD16950EFV-EVK-001
4.2 Software
The BD16950EFV-C software user interface consists of an .exe and .dll file, which have to be copied in one folder of your Windows
PC. Please check with your local ROHM sales office or ROHM customer support system to have the latest software version.
Since the GUI is designed as Human Interface Device (HID), no driver installation will be required.
After plugging in the evaluation board with the USB cable to the PC it will automatically be recognized by Windows and show as
“GHOST USB Interface” in “Devices and Printers”.
Figure 6: User Interface Software Files
NOTE: The evaluation board should be connected by USB cable to the PC before starting the software.
Then the software can be started by double clicking the “.exe” file.
In case the USB Cable is not connected or recognized by Windows, the GUI will report so (Figure 8).
In case the USB Cable is connected but not recognized, disconnect the USB cable and reconnect after 5-6 seconds.
GUI Description:
•PWM sliders: Set the duty cycle of the two PWM input signals which connect to BD16950EFV-C.
•RESET button: RES(H): High pin level, RES(L): Low pin level. Typically not required to change.
•SEL button: SEL(H): High pin level. Will only switch to low when SPI Read / Write. SEL(L): Constantly low.
•SET pull-down menu: Can select some pre-defined register settings. (Table 4, Table 5)
When the menu is selected, reset chip and set registers on table 4. Then enable “Enable Register” to drive motor.
•CMD pull-down menu: Select the register by address and name to apply your desired settings. Only BD16950EFV-C specific
commands can be sent. OR use “raw” mode to send/receive general commands to the SPI interface.
•WR button: Write the configured Bits to the selected register.
•RD button: Read the selected register.
Use the buttons to the left of the “WR” button to set the individual Bits of the selected register. The resulting binary word is shown as
HEX value.
The following procedure is recommended in particular when operating the first time in a new application:
1. Set PWM1 slider to 100 and PWM2 slider to 0
(PWM1:”100” is PWM duty 0 %, PWM2:”0” is PWM duty 0 %)
2. Configure registers 02h-08h according to your application.
3. Enable the IC, charge pump and output drivers in register 01h
4. Increase PWM duty cycle (only applicable if your configured mode of operation uses PWM) and monitor load current and
EVK temperature.

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User’s Guide
BD16950EFV-EVK-001
Typical register settings which are suitable for operating this EVK are summarized in Table 3.
Address
Value
Description
04h
0Ah
Source current = 10 mA
05h
1Eh
Sink current = 30 mA
06h
10h
CCPT = 5 µs
07h
02h
OCP = 400 mV
08h
09h
OCP Filter = 10 µs
02h
18h
Ch1 = Mode 9, CH2 = Mode 3
01h
04h
EN = High (note 1)
01h
06h
EN + CP = High (note 2)
01h
07h
EN + CP + DRVEN = High (note 3)
Table 3: Typical register settings
(note 1)MCU sends the EN=’1’ command. State is changed to Normal state.
(note 2)MCU sends the CPEN=’1’ command. Charge pump circuit is activated. Charge time is 0.2ms(Max).
(note 3)MCU sends the DRVEN=’1’ command. GH1, GL1, GH2 and GL2 outputs are active(Constant current driving).
Each register setting is set before DRVEN=’1’.
Resister (Addr.: Description)
SET (Mode Setting)
v1
OFF
v1
Basic CW
v1
Basic CCW
v1
PWM1 CW
v1
PWM2
CCW
0x02: Mode Setting Ch2, Ch1
00
18
81
18
81
0x03: Protection Mode Setting
FC
FC
FC
FC
FC
0x04: Half-br Motor Op. set 1 Curr_Src[ ]
1F
1F
1F
1F
1F
0x05: Half-br Motor Op. set 2 Curr_SINK[ ]
1F
1F
1F
1F
1F
0x06: Half-br Motor Op. set 1 CCPT[ ]
07
07
07
07
07
0x07: OCP setting OCPHD[ ], OCPLD[ ]
0B
0B
0A
0B
0B
0x08: OCP Filter time setting OCP-FILT[]
09
09
09
09
09
Table 4: (SET pull-down menu) Pre-defined register setting value v1 [hex]
Resister (Addr.: Description)
SET (Mode Setting)
v2
OFF
v2
Basic CW
v2
Basic CCW
v2
PWM1 CW
v2
PWM2
CCW
0x02: Mode Setting Ch2, Ch1
00
18
81
18
81
0x03: Protection Mode Setting
FC
FC
FC
FC
FC
0x04: Half-br Motor Op. set 1 Curr_Src[ ]
10
10
10
10
10
0x05: Half-br Motor Op. set 2 Curr_SINK[ ]
1E
1E
1E
1E
1E
0x06: Half-br Motor Op. set 1 CCPT[ ]
07
07
07
07
07
0x07: OCP setting OCPHD[ ], OCPLD[ ]
0B
0B
0B
0A
0B
0x08: OCP Filter time setting OCP-FILT[]
09
09
09
09
09
Table 5: (SET pull-down menu) Pre-defined register setting value v2 [hex]