Infineon BTS6133DAUMA1 High-Side Power Switch: Datasheet, Application Circuit, and Pin Configuration Guide

The Infineon BTS6133DAUMA1 is a versatile and robust high-side power switch from Infineon's extensive portfolio of PROFET™ (Protected FET) devices. Designed for a wide range of automotive and industrial applications, this intelligent switch integrates a vertical power MOSFET with comprehensive protection and diagnostic features into a single, compact package. Its primary function is to serve as a solid-state replacement for electromechanical relays and fuses, offering superior reliability, faster switching, and advanced system diagnostics.

Key Features from the Datasheet

The datasheet for the BTS6133DAUMA1 highlights several critical features that make it an excellent choice for demanding environments:

Output Current: It can handle a continuous current of up to 4.5A, making it suitable for driving various loads such as bulbs, motors, and solenoids.

Low On-State Resistance (RDS(on)): With a typical RDS(on) of just 70 mΩ, the device minimizes power dissipation and heat generation, improving overall system efficiency.

Comprehensive Protection: The chip includes a suite of built-in protection features, including overload protection, short-circuit protection, over-voltage clamp, and overtemperature shutdown. These features safeguard both the switch and the connected load from damage under fault conditions.

Advanced Diagnostics: It provides precise current sense and diagnostic feedback via a dedicated IS pin. This allows the microcontroller to monitor load status (e.g., normal operation, open load, short to ground, or overtemperature) without additional external components.

Automotive Qualified: The device is AEC-Q100 qualified, ensuring it meets the stringent reliability and quality standards required for automotive electronics.

Green Product (RoHS compliant): It is manufactured with environmentally friendly materials.

Application Circuit

The typical application circuit for the BTS6133DAUMA1 is remarkably simple, demonstrating its ease of use. The core components are:

1. Load Connection: The output pin (OUT) is connected in series with the load (e.g., a lamp, DC motor), which is then connected to ground.

2. Power Supply: The battery voltage (typically 12V in automotive systems) is supplied directly to the VS (Supply Voltage) pin.

3. Control Input: A microcontroller GPIO pin controls the IN (Input) pin. Applying a logic-high signal (typically > 3.5V) turns the power switch ON, enabling current to flow to the load. A logic-low signal turns it OFF.

4. Diagnostic Feedback: The current sense (IS) pin is connected to an analog-to-digital converter (ADC) input of the microcontroller through a sense resistor (R_IS). The voltage on this pin is proportional to the load current, enabling precise monitoring.

5. Optional Components: A capacitor (e.g., 100nF) between the VS pin and GND is recommended for local supply decoupling and stability.

This simple interface significantly reduces the need for external circuitry, saving board space and lowering the total system cost.

Pin Configuration Guide

The BTS6133DAUMA1 is offered in a space-saving, surface-mount PG-DSO-8 package. The pinout is as follows:

| Pin Number | Pin Name | Function |

| :--- | :--- | :--- |

| 1 | IN | Digital Control Input. Turns the switch ON/OFF. |

| 2 | GND | Ground. Reference potential for the IC. |

| 3 | n.c. | Not connected. Can be left floating. |

| 4 | IS | Diagnostic Current Sense Output. Provides analog feedback proportional to load current. |

| 5 | OUT | Switched Output. Connects to the load. |

| 6 | OUT | Switched Output. Internally connected to Pin 5. |

| 7 | VS | Supply Voltage. Connected to the battery rail. |

| 8 | VS | Supply Voltage. Internally connected to Pin 7. |

Pins 5-6 and 7-8 are duplicated to enhance current-carrying capability and improve thermal performance by connecting to larger copper areas on the PCB.

ICGOODFIND Summary

The Infineon BTS6133DAUMA1 is a highly integrated and intelligent high-side switch that excels in automotive and industrial applications. Its key strengths lie in its robust built-in protection suite, accurate diagnostic capabilities, and very low power dissipation. By simplifying design, enhancing reliability, and providing critical system feedback, it represents an optimal solution for driving medium-power loads, effectively modernizing systems that traditionally relied on relays and fuses.

Keywords:

1. High-Side Power Switch

2. PROFET™

3. Automotive Qualified

4. Current Sense Diagnostic

5. Integrated Protection