company blog about Infineon BTS3408G Dual Channel Low-Side Switch With D-MOS Output Stages For Inductive Loads

Infineon BTS3408G Dual Channel Low-Side Switch With D-MOS Output Stages For Inductive Loads

Shenzhen Mingjiada Electronics Co., Ltd., as a globally renowned distributor of electronic components, supplies the Infineon BTS3408G dual-channel low-side smart power switch. This product employs a D-MOS output stage and is specifically designed to drive resistive, capacitive, and inductive loads.

Based on Infineon's Smart Power Technology (SPT), the BTS3408G integrates bipolar CMOS and power D-MOS devices on a single die, delivering both high performance and reliability. It is ideally suited for automotive and industrial applications.

[BTS3408G Overview: Intelligent Switch Designed for Inductive Loads]

The BTS3408G is a dual-channel low-side smart power switch. Its wide input voltage range of 4.5V to 60V enables adaptation to diverse operating environments.

Each channel delivers up to 550mA output current with a typical on-resistance of just 480mΩ, effectively minimising power dissipation.

Supporting logic-level inputs, the BTS3408G is fully compatible with modern 3V microcontrollers, simplifying system design.

With a switching frequency up to 50kHz, it meets most high-frequency application requirements, making it ideal for driving stepper motors and lines.

The BTS3408G utilises a compact yet powerful PG-DSO-8 package, featuring:

Dual-channel design: Provides two independent output channels, each delivering up to 550mA maximum output current

Wide operating voltage range: Load voltage range from 4.5V to 60V, suitable for 12V, 24V, and 42V automotive electrical systems

Low on-resistance: Typical on-resistance of just 480mΩ, maximum 550mΩ, effectively minimising power dissipation

3V microcontroller compatibility: Logic-level inputs enable direct connection to 3V microcontrollers without additional level-shifting circuitry

【BTS3408G Core Technical Features: Tailored for Inductive Loads】

D-MOS Output Stage Architecture

The D-MOS output stage employed in the BTS3408G underpins its exceptional performance. Compared to traditional bipolar power devices, D-MOS technology delivers faster switching speeds, higher input impedance, and superior thermal stability. This renders the BTS3408G particularly well-suited for applications operating at switching frequencies up to 50kHz, providing precise control whether driving DC motors, stepper motors, or relay coils.

Comprehensive Protection: Ensuring System Stability

The BTS3408G incorporates multiple built-in protection mechanisms designed with system safety in mind:

Overtemperature Protection: Automatically shuts down when chip temperature exceeds safe limits, restarting automatically upon recovery

Short-Circuit and Overload Protection: Integrated current limiting (fixed value of 1A) prevents damage from output short circuits or overloads

Open-Circuit Load Detection: Detects open-circuit conditions during shutdown, enabling system diagnostics

Overvoltage Protection: Withstands transient voltages up to 60V, ensuring stable operation in harsh electrical environments

Electrostatic Discharge Protection: Built-in ESD protection enhances reliability during assembly and operation

These embedded protection features make the BTS3408G highly suitable for applications demanding high reliability, such as 24V body ECUs in trucks and agricultural vehicles.

Advanced Diagnostic and Control Capabilities

The BTS3408G offers extensive control interfaces and diagnostic features:

FREEZE Function: Multiplexed FREEZE capability allows users to suspend switching operations for system diagnostics

Fault Indicator Output: Integrated open-drain status feedback (FAULT) pin provides a general fault flag, reflecting real-time device status

Direct Input Parallel Control: Supports input parallel operation, enhancing design flexibility

Auto-Restart Function: Automatically resumes normal operation upon fault condition resolution

【BTS3408G Application Domains: From Automotive Electronics to Industrial Control】

The BTS3408G's robust characteristics enable outstanding performance across multiple sectors:

Automotive Electronics: Suitable for body control modules, seat adjustment, window/door control systems, compliant with AEC certification standards

Industrial Automation: Drives inductive loads such as relays, solenoid valves, and small DC motors

Power Management: Delivers outstanding performance in power distribution systems requiring multi-channel switching control

The BTS3408G's PG-DSO-8 package not only saves space but also provides excellent thermal dissipation. Operating within a temperature range from -40°C to +150°C, it fully meets the stringent demands of automotive and industrial applications.