July 2014
DocID026151 Rev 2
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www.st.com
EV-VN7140AS
VN7140AS evaluation board
Data brief
Features
Max transient supply voltage
VCC
40 V
Operating voltage range
VCC
4 to 28 V
Typ. on-state resistance (per Ch)
RON
140 mΩ
Current limitation (typ)
ILIMH
12 A
Stand-by current (max)
ISTBY
0.5 µA
Simple single IC application board dedicated
for VN7140AS-E
Provides electrical connectivity and thermal
heat-sinking for easy prototyping
General device features
Single channel smart high side driver
with analog feedback
Very low standby current
Compatible with 3 V and 5 V CMOS
outputs
Diagnostic functions
Dedicated high precision proportional
load current sense
Overload and short to ground (power
limitation) indication
Thermal shutdown indication
OFF-state open-load detection
Output short to VCC detection
Sense enable/disable
Protections
Undervoltage shutdown
Overvoltage clamp
Load current limitation
Self limiting of fast thermal transients
Loss of ground and loss of VCC
Reverse battery with external
components
Electrostatic discharge protection
Applications
Typical applications are all types of automotive
resistive, inductive and capacitive loads.
Description
This board provides you an easy way to connect
STMicroelectronics® VIPower® M0-7 technology
into your existing system.
Table 1: Device summary
Order code
Reference
EV-VN7140AS
VN7140AS evaluation board
Overview
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1 Overview
It comes pre-assembled with VN7140AS-E high-side driver. On board minimum set of
electrical components (as for device datasheet recommendation) is enabling the user to
directly connect the load, the power supply and the microcontroller without any additional
effort in external component design and connection.
The VN7140AS-E is a single channel high-side driver manufactured using ST proprietary
VIPower® technology and housed in SO-8 package. The device is designed to drive 12 V
automotive grounded loads through a 3 V and 5 V CMOS-compatible interface and to
provide protection and diagnostics.
The device integrates also advanced protective functions such as load current limitation,
overload active management by power limitation and overtemperature shutdown.
A dedicated high precision proportional load current sense is available, in addition to the
detection of overload and short circuit to ground, short to VCC and OFF-state open-load.
A sense enable pin allows OFF-state diagnosis to be disabled during the module low-
power mode as well as external sense resistor sharing among similar devices.
Figure 1: Evaluation board schematic
1
2
3
4
5
6
7
8
9
10
J4
1
2
3
4
5
6
7
8
9
10
J1 Vbat Vbat
C1
100nF
PGND
PGND
D1
ES1DL
Out
LED
1
2
J2
C2
10nF
R8
2k2
R7
4K7
R3 15K
+5V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
J3
CON18
IN
S_EN
MultiSense
R1 15K
IN
Rsense
MultiSense
S_EN
R6 15K
Cext
1
TP2
1
TP1
SEn
2
GND
3
INPUT
1VCC 8
OUTPUT 7
OUTPUT 6
VCC 5
MultiSense
4
U1
SO-8
Vbat
Vbat
R_UP
In_PullUP
In_PullUP
PGND
PGND
PGND PGND
PGND
EV-VN7140AS
Board connections
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2 Board connections
Figure 2: "Evaluation board connections" shows the placement of the connectors to be
used for supplying the evaluation board, connecting the load and controlling the
functionality and diagnostic of the device.
Figure 2: Evaluation board connections
Table 2: J3 connector: pin functions
Connector
Pin
number
Pin name
Pin function
J3
1…4
N/A
Not connected
J3
5
IN_PullUP
Connection to optional external pull-up resistor for open load
detection in off-state.
J3
6
+5V
5 V Power Supply
J3
7
N/A
Not connected
J3
8
MultiSense
Current Sense pin: it delivers a current proportional to load
current
J3
9
S_EN
Active high compatible with 3 V and 5 V CMOS outputs pin;
it enables the MultiSense diagnostic pin.
J3
10…12
N/A
Not connected
J3
13
IN
Voltage controlled input pin with hysteresis, compatible with
3 V and 5 V CMOS outputs. It controls OUT switch state.
J3
14…18
N/A
Not connected
In case the user wishes to utilize the Current Sense/MultiSense function of the device, it is
necessary to plug a sense resistor in RSENSE.
The package includes a through-hole resistor, to be mounted on TP1-TP2 (see Figure 4:
"Mounting through-hole sense resistor").
Different RSENSE values can be adopted based on user preference.
EV-VN7140AS
Thermal data
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3 Thermal data
Table 3: Thermal data
Symbol
Parameter
Max
Unit
Rthj-amb
Thermal resistance junction-ambient (MAX)
64
°C/W
Table 4: PCB specifications
Parameter
Value
Board dimensions
25 mm x 41.5 mm
Number of Cu layer
2
Layer Cu thickness
35 μm
Board finish thickness
1.6 mm +/- 10%
Board Material
FR4
Thermal vias separation
1.1 mm
Thermal vias diameter
0.5 mm
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