company blog about Infineon BTS3256D Automotive Smart Low-Side Power Switch IC

Infineon BTS3256D Automotive Smart Low-Side Power Switch IC

Shenzhen Mingjiada Electronics Co., Ltd. supplies the Infineon BTS3256D intelligent low-side power switch IC, providing high-performance solutions for automotive electronics and industrial applications.

Product Overview:

The BTS3256D is a high-performance single-channel low-side power switch in a PG-TO-252-5-11 package, specifically designed for automotive electronics and industrial applications. The BTS3256D device is part of Infineon's HITFET™ product series, integrating an N-channel vertical power MOSFET and a smart control chip, featuring embedded protection functions and excellent control performance.

As an intelligent power device, the BTS3256D integrates the power switch and intelligent control circuitry into a single package, significantly simplifying system design. Its TO-252-5 (DPAK) surface-mount package format meets the requirements for compact layout while providing excellent thermal performance, making it ideal for modern electronic devices that demand miniaturisation and high density.

Core Technical Features And Advantages:

The BTS3256D intelligent low-side power switch IC incorporates multiple innovative technologies from Infineon in the power semiconductor field, featuring the following outstanding technical characteristics:

Efficient EMC-optimised design: The BTS3256D controls the switching rate via dedicated pins, supporting EMC-optimised switching or PWM operation, with a maximum switching frequency of up to 12kHz, meeting the stringent electromagnetic compatibility requirements of modern electronic systems.

Comprehensive protection features: The BTS3256D integrates a time-controlled automatic restart mechanism, providing high-temperature and overload protection; it employs effective current limiting technology with time and power limits to prevent device damage; and it includes built-in electrostatic discharge (ESD) protection circuits to enhance system reliability.

Low on-resistance: The BTS3256D achieves extremely low RDSDS(on) (maximum 10mΩ) under 3.3V or 5V logic input, significantly reducing conduction losses and improving system efficiency.

Wide operating voltage range: The BTS3256D supports a wide power supply voltage range from 5.5V to 30V, suitable for various automotive and industrial application environments.

The BTS3256D demonstrates outstanding performance parameters: output current capability up to 7.5A, transient current limit of 42A, and an operating temperature range from -40°C to +150°C, fully meeting the wide temperature operation requirements of automotive-grade applications. Its extremely low leakage current characteristics also make it an ideal choice for energy-efficient designs.

Compared to similar products, the BTS3256D's greatest advantage lies in its intelligent integration. Traditional solutions require multiple discrete components to achieve protection functionality, whereas the BTS3256D integrates these functions into a single chip, not only saving PCB space but also enhancing system reliability and reducing overall costs.

Typical Application Scenarios

The BTS3256D intelligent low-side power switch IC, with its outstanding performance and reliability, has widespread applications in automotive electronics and industrial control fields:

Automotive Electronics Applications

In body control systems, the BTS3256D can be used for interior lighting dimming drive applications. Its PWM control capability supports precise brightness adjustment, while the built-in protection functions ensure reliable operation under various abnormal conditions. This BTS3256D device is also suitable for solenoid drive applications in powertrain systems, such as transmission control and fuel injection systems, where its fast switching response and high current drive capability meet the stringent requirements of these critical systems.

As automotive electronics continue to advance, the BTS3256D can also be applied to auxiliary systems in new energy vehicles, such as contactor control in battery management systems (BMS) and fan drive in thermal management systems. Its AEC-Q100 certification ensures long-term reliable operation in harsh automotive environments.

Industrial Automation Applications

In industrial control systems, the BTS3256D can be used to drive solenoid valves, relays, and small motors. Its intelligent protection features prevent system damage caused by load short circuits or overcurrent. In factory automation equipment, the BTS3256D device can drive various actuators, such as pneumatic components and small linear motors. Its EMC-optimised design helps reduce interference with sensitive control circuits.

The BTS3256D is also suitable for industrial lighting control systems, particularly LED driver applications requiring PWM dimming. Its high switching frequency supports precise brightness control, while the integrated thermal protection function extends the lifespan of lighting fixtures.

BTS3256D Block Diagram