Infineon BSP452 Automotive Smart High Side Power Switch With Integrated Vertical Power FET

 

Shenzhen Mingjiada Electronics Co., Ltd., a globally renowned distributor of electronic components, offers the BSP452 from stock—an intelligent high-side power switch chip designed specifically for automotive applications. Integrating a vertical power field-effect transistor (FET) and comprehensive protection features, it meets the stringent demands of automotive electronics for high reliability and compact design.

 

【BSP452 Product Overview】

Infineon's BSP452 is a high-side power switch integrated circuit employing integrated vertical power field-effect transistor (N-channel MOSFET) technology, specifically engineered for demanding automotive and industrial applications.

 

This chip belongs to Infineon's Classic PROFET (Protected FET) product family, operating within a load voltage range of 5V to 34V and delivering a continuous output current of up to 700mA.

 

With a typical on-resistance of just 160 milliohms, the BSP452 effectively reduces power consumption and thermal dissipation while enhancing power conversion efficiency. Its non-inverting input configuration and on/off interface simplify control logic, facilitating straightforward system integration.

 

The BSP452 is an intelligent high-side power switch within Infineon's Classic PROFET™ series. Housed in an SOT-223-4 package, it integrates a vertical power FET alongside multiple embedded protection functions.

 

This highly integrated design substantially reduces the number of external components, lowering system complexity and PCB footprint. It is particularly well-suited for space-constrained automotive electronics applications.

 

The vertical power FET architecture forms the core of the BSP452. This design simultaneously achieves high current density and breakdown voltage, meeting the demands of higher-power applications.

 

Compared to traditional planar structures, the vertical architecture offers superior gate control capability and lower on-resistance, thereby reducing power consumption and thermal dissipation.

 

 

【BSP452 Key Performance Parameters】

The BSP452 boasts several impressive electrical specifications: it supports an operating voltage range of 5V to 34V, delivers a maximum output current of 700mA, and features a current limit of 1.5A.

 

Its maximum on-resistance is 200mΩ, with a typical value of just 160mΩ. This low on-resistance effectively reduces power consumption and thermal dissipation, enhancing power conversion efficiency.

 

The chip's maximum operating time is 100μs, with a maximum idle time of 150μs, and a power dissipation (Pd) of 1.8W. It operates stably within the extreme temperature range of -40°C to +150°C, meeting the stringent requirements of automotive electronics environments.

 

【Comprehensive Protection Features, Enhanced System Reliability】

A key highlight of the BSP452 is its comprehensive embedded protection functionality. It provides short-circuit protection, input protection, and hysteresis-based over-temperature protection.

 

This hysteresis design prevents repeated switching near critical temperature points, improving system stability.

 

The BSP452 further incorporates overload protection, overvoltage protection, and undervoltage shutdown. Notably, its capability to switch inductive loads and negative output voltage clamping with inductive loads enables direct driving of inductive loads such as motors and relays without requiring external protection diodes.

 

The BSP452 further incorporates electrostatic discharge (ESD) protection and battery reverse polarity protection. These features are particularly crucial in automotive environments, where electronic systems frequently encounter harsh conditions such as power supply reverse connections and sudden load drops.

 

Diagnostic Capabilities and Safety Features

Beyond protection functions, the BSP452 provides diagnostic capabilities to monitor load status and report fault information. This capability is vital for automotive systems, enabling the main controller to monitor the power switch's operational status in real time and promptly detect and address anomalies.

 

The chip holds AEC-Q100 certification, the international standard qualification for automotive electronic components, ensuring high reliability and extended lifespan in automotive applications. The BSP452 also complies with RoHS standards, qualifying it as an environmentally friendly (green) product.

 

Its exceptionally low standby current helps reduce system power consumption and extend battery life. The automatic restart function following thermal shutdown ensures the system resumes normal operation without manual intervention once abnormal conditions are resolved.

 

【BSP452 Application Areas】

Having passed AEC-Q100 certification, the BSP452 meets stringent automotive electronics standards and finds broad application in automotive power management, safety systems, and related domains.

 

Within automotive electronics, the BSP452 is suitable for various in-vehicle applications including body electronic control, engine management systems, and on-board chargers.

 

In industrial control, the BSP452 facilitates reliable power supply and efficient control for equipment within automated production line power distribution and motor drive systems.

 

For consumer electronics, this chip is suitable for switch-mode power supply circuits in mobile phone chargers and laptop power adapters, as well as power management circuits in devices such as tablets and smart speakers.

 

【Technical Specifications and Key Features】

The BSP452 utilises an SOT-223-4 package (also known as PG-SOT223-4 or TO-261-4), suitable for surface mount (SMD/SMT) processes.

 

The BSP452 operates within an exceptionally wide temperature range of -40°C to 150°C, ensuring reliability in diverse harsh environments.

 

Featuring low standby current, the BSP452 contributes to reduced system power consumption, making it particularly suitable for automotive electronics requiring constant power supply.

 

Its high switching speed capability renders it ideal for high-frequency switching power supply applications, enabling rapid state transitions and enhanced energy conversion efficiency.