Infineon BTS133TCBUMA1 Smart High-Side Power Switch: Features and Application Circuit Design

The Infineon BTS133TCBUMA1 is a state-of-the-art smart high-side power switch designed for robust and efficient power management in automotive and industrial applications. As part of Infineon’s PROFET™ (Protected MOSFET) family, this device integrates advanced protection, diagnostics, and control features, making it an ideal solution for driving resistive, inductive, or capacitive loads with high reliability.

Key Features of the BTS133TCBUMA1

One of the standout attributes of the BTS133TCBUMA1 is its integrated protection functions. These include overload protection, short-circuit protection, overtemperature shutdown, and overvoltage protection. These features ensure the device operates safely under harsh conditions, significantly enhancing system durability. Additionally, the switch offers diagnostic feedback via a status pin, which provides real-time information on fault conditions such as overtemperature or open-load scenarios.

The device supports a wide operating voltage range from 5.5 V to 36 V, catering to both 12 V and 24 V systems commonly found in automotive environments. Its low standby current and efficient switching capabilities contribute to reduced power dissipation, making it suitable for energy-sensitive applications. The BTS133TCBUMA1 also features reverse battery protection, safeguarding the circuit against accidental reverse polarity connection.

Application Circuit Design

Designing an application circuit with the BTS133TCBUMA1 is straightforward due to its high level of integration. A typical circuit involves connecting the input pin (IN) to a microcontroller GPIO for digital control, while the output pin (OUT) drives the load, such as a lamp, motor, or solenoid. The status diagnostic pin (IS) is often connected to an ADC or digital input of the microcontroller to monitor the operating state.

For optimal performance, it is crucial to include decoupling capacitors near the VBB and GND pins to suppress voltage spikes and noise. In automotive applications, additional transient voltage suppression (TVS) diodes may be employed at the VBB line to protect against load-dump and other high-energy transients. The device’s current sense capability allows for proportional load current monitoring, enabling precise control and diagnostics.

Thermal management is efficiently handled through the internal overtemperature protection, but for high-current applications, a PCB heatsink or adequate copper pour is recommended to improve heat dissipation.

ICGOOODFIND

The Infineon BTS133TCBUMA1 stands out as a highly integrated and protected solution for high-side switching, offering exceptional reliability and ease of implementation in demanding environments.

Keywords:

Smart High-Side Switch, Overcurrent Protection, Diagnostic Feedback, Automotive Applications, Load Driving