BTS50085-1TMA Specifications, Functions, Purpose and More
11 March 2024
Ⅱ. Specifications of BTS50085-1TMA
Ⅲ. What are the functions of BTS50085-1TMA?
Ⅳ. Inverse load current operation of BTS50085-1TMA
Ⅴ. Externally adjustable current limit of BTS50085-1TMA
Ⅵ. How to use and layout BTS50085-1TMA correctly?
Ⅷ. How to use BTS50085-1TMA with other circuit components?
BTS50085-1TMA is a high-side switching power MOSFET driver chip manufactured by Infineon. It is a critical component for driving high-power loads, enabling efficient and reliable power control. This article will introduce the BTS50085-1TMA in terms of specifications, functions, layout and usage.
BTS50085-1TMA is a high-side switching power MOSFET driver chip whose main function is to control the switching operation of high-power loads. By regulating the input signal, it effectively connects the high-side MOSFET switch to power or ground to achieve power management of the load. The chip is able to accept input voltages from 5V to 28V, making it suitable for a variety of supply voltage environments. In addition, the maximum output current of the BTS50085-1TMA can reach 8A, which is enough to drive high-power loads and meet the needs of various application scenarios. To ensure the stable operation of the system, it has built-in multiple protection functions, including over-temperature protection, over-current protection, and short-circuit protection. These protection mechanisms can respond to abnormal situations in a timely manner, effectively prevent circuit components from being damaged, and ensure the safety and reliability of the system. In addition, BTS50085-1TMA supports two packaging forms, TO-220 and TO-263, which provides design engineers with more choices and can choose the appropriate packaging type according to specific application scenarios and layout requirements.
Alternatives and equivalents:
• The manufacturer of BTS50085-1TMA is Infineon Technologies.
• The operating supply voltage of BTS50085-1TMA is 5V to 58V.
• Its power consumption is 170W.
• Its operating temperature is -40°C to 150°C.
• Its installation method is SMD or SMT.
• BTS50085-1TMA has 8 pins and comes in TO-220-7 package and tape and reel packaging.
• BTS50085-1TMA has a length of 10 mm, a width of 9.25 mm and a height of 4.4 mm.
1. Low power consumption: The chip adopts a low-power design to provide efficient current measurement while minimizing power consumption during operation. This feature helps to save energy and thus extends battery life.
2. High-precision measurement: The chip utilizes high-precision measurement technology to provide accurate current measurement results. With its low drift and low noise characteristics, it provides stable and reliable measurement performance under different operating conditions.
3. High-side current measurement: The BTS50085-1TMA is equipped with high-side current measurement capability, which enables accurate measurement of current in high-side circuits. It not only tracks current values in real time, but also outputs accurate current measurement results.
4. Compatibility: The BTS50085-1TMA is compatible with a wide range of peripheral components and circuits for a variety of current measurement and protection applications. It can be easily integrated with other electronic devices and systems, providing a flexible and scalable solution.
5. Built-in protection: The BTS50085-1TMA also features built-in protection for protecting circuits and chips from faults such as over-current, over-temperature and short-circuit. It monitors current and temperature in real time and triggers the protection mechanism when a fault occurs to protect the related circuits and devices.
The device is specified for inverse load current operation (VOUT > Vbb > 0V). The current sense feature is not available during this kind of operation (IIS = 0). With IIN = 0 (e.g. input open) only the intrinsic drain source diode is conducting resulting in considerably increased power dissipation. If the device is switched on (VIN = 0), this power dissipation is decreased to the much lower value RON(INV) * I².
Note: Temperature protection during inverse load current operation is not possible!
If the device is conducting, the sense current can be used to reduce the short circuit current and allow higher lead inductance (see diagram above). The device will be turned off, if the threshold voltage of T2 is reached by IS*RIS . After a delay time defined by RV*CV T1 will be reset. The device is turned on again, the short circuit current is defined by IL(SC) and the device is shut down after td(SC) with latch function.
• Over-temperature protection: If the BTS50085-1TMA needs to work in a high-temperature environment, the heat dissipation and ventilation conditions around the chip must be fully considered in the design to avoid chip failure caused by overheating.
• PCB layout: We need to ensure that the PCB layout is compact and concise to reduce circuit length and loop area, thereby reducing electromagnetic interference and crosstalk. During the layout process, we should avoid placing large current loops or other components that may cause interference around the BTS50085-1TMA to ensure the normal operation of the chip and the reliability of signal transmission.
• Power and ground wire layout: In order to ensure the stable operation of the BTS50085-1TMA, we need to ensure that the power and ground wires provided for it are short and thick to reduce resistance and voltage drop. The power and ground wires should be as close as possible to the connection point of the chip to reduce line losses. In addition, be sure to separate the power ground wire and signal ground wire of the chip and arrange them reasonably on the PCB to reduce electromagnetic interference.
• Thermal design: In order to ensure that the BTS50085-1TMA can maintain normal operating temperature under various load conditions, we need to provide it with sufficient heat dissipation. This can be achieved through the use of heat sinks, heat sinks or other cooling technologies, the specific choice should be determined based on the actual application requirements. At the same time, we should install the heat dissipation component near the BTS50085-1TMA to ensure the best heat dissipation effect.
• Testing and verification: Before the final design is finalized, we must go through an exhaustive testing and verification process to verify that the BTS50085-1TMA can operate stably in various working scenarios and meet predetermined performance standards.
The following are the main uses of the BTS50085-1TMA chip:
1. Electric load control
BTS50085-1TMA is designed to control electric loads, including but not limited to electric windows, electric seats, and electric sunroofs. It not only has powerful switching control capabilities and can accurately control the start and stop of electric loads, but also incorporates advanced speed adjustment functions so that the operating speed of electric loads can be flexibly adjusted according to actual needs.
2. Electric drive system
BTS50085-1TMA can be used in electric drive systems such as electric vehicles, hybrid vehicles and electric motorcycles. It can control the motor in the electric drive system and realize the functions of starting, stopping, accelerating and decelerating the motor. In electric vehicles, BTS50085-1TMA can ensure that the vehicle starts smoothly, responds quickly to the driver's acceleration instructions, and achieves smooth deceleration when needed, providing drivers with a more comfortable and safer driving experience. At the same time, the chip also shows excellent performance in hybrid vehicles and electric motorcycles, providing efficient and stable power output for these vehicles.
3. Other applications
BTS50085-1TMA can also be used in other applications requiring high-side switch control. For example, it can be used in battery management systems, electric power steering systems, electric braking systems, etc. in automotive electronic systems. In automotive electronic systems, BTS50085-1TMA, with its precise control capabilities and stable performance, can achieve precise management of the battery pack and ensure safe and efficient operation of the battery. By precisely controlling the charging and discharging process of the battery, the chip can effectively prevent battery overcharging, over-discharging and other problems, thereby extending the service life of the battery and improving the overall performance of the vehicle. In addition, the electric power steering system is also an integral part of the automotive electronic system. BTS50085-1TMA can achieve precise control of the electric power steering system to ensure smooth operation and stable performance of the steering system. By optimizing the output of steering torque, the chip can provide drivers with a more comfortable and precise driving experience, improving vehicle safety and handling.
First of all, the BTS50085-1TMA also has a variety of built-in protection modules, such as over-temperature protection, over-voltage protection, over-current protection and open-circuit detection. These protection features can help protect other circuit components from potential damage or failure. We can use the BTS50085-1TMA in combination with other circuit components (such as sensors, switches, capacitors, etc.) to build a stable and reliable circuit system.
Second, the input of the BTS50085-1TMA is designed as a current control terminal, allowing us to utilize PWM signals to precisely regulate the load current at its output. This means that we can connect a PWM signal generator or a corresponding controller to the input of the BTS50085-1TMA to achieve precise control of the current. Through this method, we are able to flexibly adjust the output current to suit various operating conditions according to the actual needs of the circuit.
In addition, the output of the BTS50085-1TMA is equipped with a diagnostic feedback terminal, which is designed to detect the magnitude of the load current and convert this information into an analog voltage signal to be output to the feedback terminal. This mechanism allows external circuitry to monitor the status and power consumption of the load in real time. This analog voltage signal can be received and processed by connecting a suitable circuit element, such as a resistor, capacitor or amplifier, to the diagnostic feedback terminal. In this way, we can monitor the operating status of the load in real time and make adjustments or take protective measures accordingly.
Frequently Asked Questions
1. What types of automotive applications can BTS50085-1TMA be used for?
BTS50085-1TMA is suitable for various automotive applications such as power distribution, heating, ventilation, and air conditioning (HVAC) systems, lighting control, and motor driving.
2. What is the replacement and equivalent of BTS50085-1TMA?
You can replace the BTS50085-1TMA with BTS660PE3180A, DRV101FKTWT, DRV101FKTWTG3 or TPS1HB08AQPWPRQ1.
3. What are some typical protections provided by BTS50085-1TMA?
BTS50085-1TMA provides protections such as over-temperature shutdown, overload protection, and short-circuit protection to safeguard the connected devices and the power switch itself.
