BTS7960 Motor Driver Datasheet and Circuit Diagram

The BTS7960 is a distinctive and highly integrated half-bridge module, specifically designed for high-current motor control applications. Part of the NovalithIC™ family, this module integrates a p-channel high-side MOSFET, an n-channel low-side MOSFET, and an integrated driver IC into a single package. One might wonder: why is the combination of these components significant for motor control? The p-channel high-side MOSFET allows for simplified gate drive circuitry, while the n-channel low-side MOSFET offers lower on-resistance and higher efficiency. Is it possible to achieve better performance with alternative configurations of MOSFETs? This question often intrigues engineers, but the integrated design of the BTS7960 has demonstrated a balanced optimization in terms of performance and reliability. Additionally, the presence of the integrated driver IC ensures more straightforward and robust control. The BTS7960, with its carefully selected components, exemplifies a thoughtful design focused on delivering both high efficiency and streamlined implementation in high-current environments.

Catalog

Features

Feature	Description
Low Path Resistance	16 mΩ at 25 °C
Low Quiescent Current	7 µA at 25 °C
High-Frequency PWM Support	Up to 25 kHz with active freewheeling
Overcurrent Protection	Switched mode current limitation
Robust Current Limit	43 A typical
Diagnostic Capabilities	Status flag diagnosis with current sensing
Temperature & Voltage Safeguards	Over Temperature shutdown, overvoltage lockout, undervoltage shutdown
Logic-Level Inputs	Driver circuit with logic-level inputs
EMI Optimization	Adjustable slew rates for optimal EMI performance

BTS7960 Detailed Description

The BTS7960 is a cornerstone of the NovalithIC family, incorporating three integral elements: a p-channel high-side MOSFET, an n-channel low-side MOSFET, and an advanced driver IC. This robust and compact module employs sophisticated chip-on-chip and chip-by-chip technologies, delivering high-current half-bridge capability that is advantageous for demanding motor control applications. By utilizing vertical MOS technologies, the on-state resistance is significantly minimized, thus improving efficiency and performance. A remarkable feature of the BTS7960 is the elimination of a charge pump by using the p-channel high-side switch, which greatly diminishes Electromagnetic Interference (EMI). This EMI reduction proves beneficial in environments where electronic noise can compromise the performance of sensitive equipment or systems. Industries have practical experiences indicating that reducing EMI is fundamental for ensuring the consistent and reliable operation of electronic circuits, contributing significantly to the overall system stability.

However, the built-in driver IC enables a seamless interface with a microcontroller by offering various control and diagnostic features. This integration simplifies the design and implementation process, allowing engineers to prioritize optimization over dealing with compatibility issues. For instance, in high-stakes automotive applications where precision and reliability are required, the BTS7960's diagnostic capabilities provide real-time feedback, ensuring prompt responses to any potential issues.

The BTS7960’s versatility is evident as it can be used in both H-bridge and 3-phase drive configurations. This adaptability makes it a valuable asset across various motor control applications. The flexibility offered is indispensable in automated systems, robotics, and electric vehicles where different configurations are necessitated to meet specific operational requirements. Using the BTS7960 in these diverse configurations offers a tailored approach to motor control, making it a preferred choice among designers and engineers.

Detailed Exploration of Maximum Ratings

Maximum ratings set the basic constraints under which electronic components or systems are permitted to operate. They include voltage, current, power dissipation, and temperature limits, and exceeding these thresholds can result in physical damage or performance degradation. Thus, adherence to these ratings is required for ensuring reliability and preventing catastrophic failures. Refer to the table below:

Application

Application	Examples	Benefits
Automotive Systems	Power windows, sunroofs,	Efficient and reliable motor control
	power seats, windshield
	wipers, HVAC systems, etc.
Robotics	Robotic arms, wheels,	Precise control and protection features essential for robotics.
	robotic joints, drones, etc.
Industrial Automation	Conveyor systems, material	Reliable motor control in industrial
	handling equipment,	automation, enhancing productivity.
	manufacturing machinery,
	robotic assembly lines, etc.
Consumer Electronics	Camera gimbals,	Stable and accurate motor control in
	camera stabilizers,	consumer electronics for smooth camera
	motorized camera sliders,	movement.
	etc.
Model Cars and Drones	Remote-controlled model	Precise speed and direction control for
	cars, boats, drones, etc.	model cars, boats, and drones.
Battery-Powered Devices	Cordless power tools,	Low quiescent current and power
	electric scooters, e-bikes,	efficiency in battery-powered devices.
	portable devices, etc.
Home Automation	Window blinds, garage door	Motorized control of home automation
	openers, smart curtains,	devices for convenience and efficiency.
	etc.
Educational Projects	DIY electronics projects,	Learning motor control concepts and
	student projects, etc.	creating practical electronic systems.

Block Diagram

Pin Configuration

Pin	Symbol	I/O
1	GND	-
2	IN	I
3	INH	I
4,8	OUT	O
5	SR	I
6	IS	O
7	VS	-

Control and Diagnostics

Input Circuit

The BTS7960 integrates Schmitt triggers that are TTL/CMOS-compatible for its IN and INH control inputs. When INH is set high, it activates one of the power switches depending on the state of IN. Conversely, setting INH to low deactivates both switches, thus ensuring a secure fail-safe mechanism. One might wonder, why is an external driver not needed in this configuration? The answer lies in how the system's design simplifies the microcontroller interfacing, which in turn enhances overall reliability.

Dead Time Generation

To prevent simultaneous conduction of high-side and low-side MOSFETs, the driver IC generates a "dead time" interval between switching transitions. This dead time is dynamically adjusted in accordance with the selected slew rate. How does this timing influence system safety? The automated adjustment of dead time helps to strike a balance between operational safety and switching efficiency, particularly in scenarios where optimized timing can avert device failures due to shoot-through conditions.

Adjustable Slew Rate

Adjusting the switching speed of the MOSFETs can be precisely accomplished using an external resistor on the SR pin. This adjustment allows for the fine-tuning needed to control electromagnetic emissions and power dissipation. For instance, in applications with stringent electromagnetic compatibility (EMC) requirements, modifying the slew rate ensures compliance while maintaining system performance. This raises an intriguing question: How does altering the slew rate impact other components? The answer demonstrates that careful customization supports overall system integrity.

Status Flag Diagnosis With Current Sense Capability

The IS pin functions dually as both a current sense and error flag output interface. Under normal operating conditions, it generates a current proportional to the load current passing through the high-side switch. But what happens during fault conditions? During such events, the pin sources a predefined current independent of the load, aiding in rapid detection of issues. The voltage at the IS pin is influenced by the external resistor and power supply, providing a straightforward yet effective diagnostic mechanism. The dual-role functionality of the IS pin streamlines the hardware design and boosts system diagnostics transparency.

Instruments utilizing current sense diagnostics gain enhanced reliability, as empirical data suggests these diagnostic tools can proactively address potential issues. This methodology has proven effective in various industrial applications, ensuring systems remain operational under differing loads and conditions.

BTS7960 Circuit Diagram

The schematic showcases a BTS7960 motor driver integrated with a 74HC244PW line driver, aimed at bolstering signal isolation. Notably, screw holes are positioned for secure mounting on motor seats, and thick power lines are incorporated to enhance heat dissipation. These design elements collectively ensure dependable performance across diverse motor control scenarios.

BTS7960 Module Schematic

BTS7960 Dimensions

P-TO-263-7 (Plastic Transistor Single Outline Package)

Footprint

P-TO-220-7 (Plastic Transistor Single Outline Package)

BTS7960 Manufacturer

Infineon Technologies is the producer of the BTS7960. Headquartered in Neubiberg, Germany, Infineon is a prominent semiconductor manufacturer that concentrates on power semiconductors, microcontrollers, and integrated circuits. Their products find applications in numerous sectors, such as automotive, industrial, and consumer electronics, with an unmistakable focus on energy efficiency, mobility, and security. Notably, Infineon is acknowledged for its recurring improvements in power management, security, and connectivity solutions, significantly shaping the electronics industry.

Frequently Asked Questions [FAQ]

1. What is the PWM frequency of BTS7960?

The PWM frequency of BTS7960 is 25 kHz. This specific frequency is optimal due to its balance between efficiency and responsiveness. Interestingly, could there be scenarios where an alternative frequency might be required for specialized applications? Yes, such scenarios may include unique motor requirements in high-precision robotics or specific manufacturing processes where customization is paramount. Users find this 25 kHz frequency suitable for tasks ranging from motion control in robotics to various automation projects.

2. What is the input voltage of BTS7960?

The input voltage range of BTS7960 falls between 6 and 27 volts DC. This wide range ensures adaptability across different project environments, making it versatile for diverse power sources. For instance, how does this flexibility influence the choice of motors for different applications? The ability to support a broad voltage range allows practitioners to power an array of motors, from small hobbyist models to robust industrial components, thereby affecting choices in project design and implementation.

3. What is the maximum current for BTS7960?

The maximum current for BTS7960 reaches up to 43A. This substantial current capacity is particularly beneficial for driving powerful motors, which is crucial in scenarios demanding high torque and speed. One might wonder, what types of projects benefit the most from such capacity? Projects like electric vehicles and heavy-duty machinery, where reliability under significant load is non-negotiable, greatly benefit from this high current capacity.

4. What is the use of BTS7960 motor driver?

The BTS7960 motor driver is tailored to control a single motor, operating within a voltage range of 6-27V DC. It necessitates a +5V logic power supply and one or two +5V PWM inputs to manage motor speed and direction. The driver is supportive of three different wiring configurations, thereby providing flexibility for varied applications.

5. What is the equivalent of BTS7960?

The equivalent component for BTS7960 is the BTN8982TA. This equivalency arises from their similar specifications and functionalities, making BTN8982TA a reliable alternative in circuit designs.