EV-VN7040AS
VN7040AS 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
40 mΩ
Current limitation (typ)
ILIMH
34 A
Stand-by current (max)
ISTBY
0.5 µA
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.
Simple single IC application board dedicated
for VN7040AS-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
April 2014
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
EV-VN7040AS
DocID026135 Rev 1
Reference
VN7040AS evaluation board
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www.st.com
Overview
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EV-VN7040AS
Overview
It comes pre-assembled with VN7040AS-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 VN7040AS-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 lowpower mode as well as external sense resistor sharing among similar devices.
Figure 1: Evaluation board schematic
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Board connections
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
J3
5
IN_PullUP
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
J3
13
IN
J3
14…18
N/A
Not connected
Connection to optional external pull-up resistor for open load
detection in off-state.
Not connected
Voltage controlled input pin with hysteresis, compatible with
3 V and 5 V CMOS outputs. It controls OUT switch state.
Not connected
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Board connections
EV-VN7040AS
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.
Another option is soldering an SMD resistor on the dedicated PCB pad, as shown in
Figure 5: "Pads for soldering SMD resistor".
Figure 3: No sense resistor
Figure 4: Mounting through-hole sense resistor
Figure 5: Pads for soldering SMD resistor
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Thermal data
Thermal data
Table 3: Thermal data
Symbol
Rthj-amb
Parameter
Thermal resistance junction-ambient (MAX)
Max
Unit
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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Revision history
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EV-VN7040AS
Revision history
Table 5: Revision history
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Date
Revision
09-Apr-2014
1
DocID026135 Rev 1
Changes
Initial release.
EV-VN7040AS
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