The VNH7070ASTR is a specific type of Power H-Bridge designed for driving motors. It is produced by STMicroelectronics, which is a well-known brand for integrated circuits and semiconductor solutions. Here's a detailed explanation that includes the pin functions, packaging details, and a set of frequently asked questions (FAQs) about the VNH7070ASTR.
Packaging Information:
Package Type: The VNH7070ASTR is typically available in a PowerSO-36 package. Number of Pins: The package has 36 pins in total.Pin Function Specification and Circuit Principle Instructions:
The VNH7070ASTR has 36 pins, each with specific functions designed for controlling high-current motors, typically in automotive and industrial applications. Below is a detailed description of each pin's function.
Pin Number Pin Name Function 1 Vcc Power supply for the device (positive voltage) 2 GND Ground pin for the device 3 IN1 Input 1: Controls the state of the H-Bridge 4 IN2 Input 2: Controls the state of the H-Bridge 5 IN3 Input 3: Controls the state of the H-Bridge 6 IN4 Input 4: Controls the state of the H-Bridge 7 VCC (Motor) Motor power supply pin 8 VM (Motor) Motor power input 9 GND (Motor) Motor ground 10 OUT1 Output 1 for driving the motor 11 OUT2 Output 2 for driving the motor 12 ISEN1 Current sensing input for motor 1 13 ISEN2 Current sensing input for motor 2 14 VCC (Logic) Logic supply voltage pin 15 IIN Input current monitoring pin 16 VS Supply voltage pin for internal control logic 17 C2 capacitor connection for decoupling 18 C1 Capacitor connection for decoupling 19 VSL Motor supply voltage pin 20 VREG Internal voltage regulator output 21 VSTBY Standby pin for disabling outputs when not needed 22 FAULT Fault detection output (active low) 23 PWM1 Pulse Width Modulation 1 for motor control 24 PWM2 Pulse Width Modulation 2 for motor control 25 CLK Clock signal for internal timing 26 GND (PWM) Ground for PWM control 27 AUX Auxiliary pin (varies by configuration) 28 INH1 Disable pin for output 1, active low 29 INH2 Disable pin for output 2, active low 30 NC No connection pin (not used) 31 NC No connection pin (not used) 32 NC No connection pin (not used) 33 NC No connection pin (not used) 34 NC No connection pin (not used) 35 NC No connection pin (not used) 36 NC No connection pin (not used)Frequently Asked Questions (FAQs):
1. What is the VNH7070ASTR used for?The VNH7070ASTR is used for controlling high-power motors, typically in automotive, robotics, and industrial automation applications. It acts as a motor driver with an H-Bridge configuration.
2. What is the maximum motor voltage supported by the VNH7070ASTR?The VNH7070ASTR can handle up to 40V on the motor supply pins.
3. How do I connect the VNH7070ASTR to a microcontroller?The VNH7070ASTR has input pins (IN1, IN2, IN3, IN4) that can be connected to GPIO pins of a microcontroller for controlling the motor's direction and speed.
4. What is the function of the FAULT pin?The FAULT pin is used to indicate a fault condition such as overcurrent or thermal shutdown. It is an active-low output pin.
5. Can the VNH7070ASTR drive a DC motor?Yes, the VNH7070ASTR is designed to drive both DC motors and stepper motors.
6. What is the purpose of the ISEN1 and ISEN2 pins?These are current sensing pins that provide feedback for monitoring the current flowing through the motor. They can be connected to an ADC for motor current measurement.
7. What is the maximum current the VNH7070ASTR can handle?The VNH7070ASTR can handle up to 30A of continuous current with proper heat dissipation and cooling.
8. How do I use the PWM pins for motor speed control?The PWM1 and PWM2 pins can be used to control the motor speed by varying the duty cycle of the PWM signal sent to these pins.
9. What is the purpose of the INH1 and INH2 pins?INH1 and INH2 are used to disable outputs 1 and 2 respectively. They are active-low pins, meaning that grounding these pins will disable the corresponding outputs.
10. Can I use the VNH7070ASTR without external capacitors?It is highly recommended to use decoupling capacitors on the C1 and C2 pins for proper operation and to reduce noise in the power supply.
11. What does the VREG pin do?The VREG pin is an output that provides an internal voltage regulator for powering other parts of the system, typically at 5V.
12. What is the Vcc pin used for?The Vcc pin is used to supply power to the device's internal control circuits. It typically requires a 5V or 3.3V logic supply.
13. Can the VNH7070ASTR operate in a 12V system?Yes, the VNH7070ASTR can operate with motor supply voltages in the range of 8V to 40V, so it is suitable for 12V systems.
14. What happens when the FAULT pin is activated?When the FAULT pin is low, it indicates that the device has detected a fault such as overcurrent, thermal overload, or undervoltage.
15. How can I reset the fault condition on the VNH7070ASTR?The fault condition can typically be reset by powering off and on the device, or by removing the fault condition (such as cooling the system if overheating is the issue).
16. What type of heat dissipation is required for the VNH7070ASTR?To ensure reliable operation, the VNH7070ASTR should be mounted on a heatsink or have proper cooling to handle the heat generated during operation.
17. Can I connect the VNH7070ASTR directly to a motor without any protection?It is recommended to use proper fuses or current-limiting circuits to protect both the motor and the device from overcurrent conditions.
18. What is the maximum operating temperature for the VNH7070ASTR?The maximum operating temperature is typically 150°C, but it is recommended to keep it below 125°C for long-term reliability.
19. What is the CLK pin used for?The CLK pin is used for internal timing purposes, ensuring synchronization within the device.
20. Is the VNH7070ASTR suitable for both brushed and brushless motors?Yes, the VNH7070ASTR can drive both brushed and brushless DC motors, though additional circuitry might be needed for brushless motors.
This completes the detailed explanation, pin list, and FAQ section for the VNH7070ASTR. Let me know if you need more details or further clarification!
