VN7050ASTR Overview
The VN7050ASTR is a single-channel high-side driver developed using STMicroelectronics' proprietary VIPower M0-7 technology and packaged in an SO-8 form factor. Designed for 12 V automotive applications, the device can drive grounded loads through 3 V and 5 V CMOS-compatible interfaces.
The device integrates a wide range of advanced protection and diagnostic functions. These include load current limitation, overload management through power limitation, and overtemperature shutdown with configurable latch-off protection.
In addition, the VN7050ASTR features a multifunction analog diagnostic output capable of providing proportional load current sensing, supply voltage feedback, and chip temperature monitoring. It also supports fault detection functions such as overload, short-to-ground, short-to-VCC, and open-load detection in the OFF state.
VN7050ASTR Key Specs
Parameter | Value |
Part Number | VN7050ASTR |
Description | IC DVR HIGH-SIDE 1CH 8SOIC |
Lead Free Status / RoHS Status | Lead free / RoHS Compliant |
Voltage - Load | 4 V ~ 28 V |
Current - Output (Max) | 21A |
Interface | On/Off |
Packaging | Tape & Reel (TR) |
Series | VIPower™ |
Ratio - Input:Output | 1:1 |
Number of Outputs | 1 |
Output Type | N-Channel |
Rds On (Typ) | 50 mOhm |
Operating Temperature | -40°C ~ 150°C (TJ) |
Output Configuration | High Side |
Package | 8-SOIC |
Base Product Number | VN7050 |
VN7050ASTR Pinout Description
INPUT: Voltage-controlled input pin with hysteresis, compatible with 3 V and 5 V CMOS outputs. It controls output switch state.
SEn: Active high compatible with 3 V and 5 V CMOS outputs pin; it enables the MultiSense diagnostic pin.
GND: Ground connection. Must be reverse battery protected by an external diode / resistor network.
MultiSense: Multiplexed analog sense output pin; it delivers a current proportional to the selected diagnostic: load current, supply voltage or chip temperature.
VCC: Battery connection.
OUTPUT: Power outputs.
VN7050ASTR Features
• AEC-Q100 qualified
• General
– Single channel smart high-side driver with MultiSense analog feedback
– Very low standby current
– Compatible with 3 V and 5 V CMOS outputs
• MultiSense diagnostic functions
– Multiplexed analog feedback of: load current with high precision
proportional current mirror, VCC supply voltage and TCHIP device
temperature
– 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
– Configurable latch-off on overtemperature or power limitation with
dedicated fault reset pin
– Loss of ground and loss of VCC
– Reverse battery with external components
– Electrostatic discharge protection
VN7050ASTR Block Diagram
The chip is a single-channel smart high-side driver based on VIPower M0-7 technology. Its block diagram shows an integrated Control & Diagnostic module, with a power MOSFET and temperature sensing connected between VCC and OUTPUT. Logic interfaces such as INPUT, SEL0/1, and SEn are linked to an internal multiplexer (MUX), allowing the microcontroller to monitor load current, battery voltage, and chip temperature in real time through the MultiSense pin.
The device also integrates multiple protection functions, including undervoltage shutdown, overtemperature protection, current limitation, and VCC-to-output clamping protection. In fault conditions such as short-to-VCC, open-load, or power limitation, the internal diagnostic logic triggers fault signals through an OR gate and feeds analog diagnostic information back to the microcontroller.
Where to Use VN7050ASTR?
The VN7050ASTR power switch integrates comprehensive protection and diagnostic functions, capable of stably driving various types of loads. It is widely applied in automotive electronics and related high-end power management scenarios.
1. Automotive Lighting Control Systems
The VN7050ASTR is ideal for automotive turn signals, tail lights, brake lights, and LED lighting control. It supports traditional lamps such as P27W and SAE1156, as well as modern LED rear combination lamps, providing stable and reliable high-side driving control.
2. Power Supply for ADAS Systems
The device can provide protected power output for ADAS modules such as automotive radars, cameras, and ultrasonic sensors, improving system stability and safety in harsh automotive environments.
3. Automotive Body Control Modules (BCM)
It is widely used in body control applications, including relays, door locks, power mirrors, and seat adjustment systems, meeting the high reliability requirements of automotive electronics.
4. Inductive and Capacitive Load Driving
The chip supports various load types, including motors, relays, solenoids, and capacitive modules, making it suitable for automotive actuators and auxiliary control systems.
5. Smart Power Distribution in New Energy Vehicles
In electric vehicles, the component can be used in intelligent power distribution units, zonal control modules, and low-voltage protection systems with integrated fault diagnosis and overcurrent protection.
6. Industrial and Embedded Protected Power Applications
Beyond automotive applications, the chip is also suitable for industrial automation, smart devices, and embedded systems requiring high-side drivers and protected power outputs.
How to Test VN7050ASTR?
First, a basic functional check should be performed by applying a 4 V to 28 V DC supply to the VCC pin, then driving the INPUT pin with a logic high signal via a microcontroller or signal generator. An oscilloscope is used to observe the OUTPUT switching behavior and switching delays (ton/toff). Next, by varying the load resistance, the linearity of the MultiSense pin is verified to ensure that the sensed voltage is proportional to the actual load current.
Second, stress testing should focus on safety protection and diagnostic functions. By simulating output short-to-ground or overload conditions, verify whether the internal current limitation and overtemperature protection can properly shut down the power stage, and check if the MultiSense pin correctly reports fault levels. In addition, the SEL0/1 pins are used to switch the internal multiplexer (MUX) to sequentially monitor current sensing, supply voltage feedback, and chip temperature.
VN7050ASTR Package
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