Smart High Side Switches# Technical Documentation: BTS716G High-Side Power Switch
Manufacturer : INFINEON
Document Version : 1.0
Date : October 26, 2023
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## 1. Application Scenarios
The BTS716G is a dual-channel, high-side power switch from Infineon’s PROFET™ (PROtected FET) family. It integrates protective and diagnostic features, making it suitable for robust, fault-tolerant switching of resistive, inductive, and capacitive loads in harsh electrical environments.
### Typical Use Cases
- Direct Load Driving : Controls loads such as DC motors, solenoids, heaters, lamps, and LEDs with currents up to 16 A per channel (with appropriate heat dissipation).
- Inductive Load Management : Includes integrated clamp diodes for inductive kickback protection, enabling direct control of relays, valves, and small motors without external flyback diodes.
- Multiplexed Power Distribution : Enables intelligent power distribution in centralized fuse/relay boxes by replacing mechanical relays and fuses.
- Module Enable/Disable Control : Serves as an electronic switch for enabling subsystems (e.g., sensors, communication modules, actuators) to minimize quiescent current in standby modes.
### Industry Applications
- Automotive :
- Body Control Modules (BCMs): Powering window lifters, door locks, seat adjusters, and interior lighting.
- Thermal Management: Controlling fans, PTC heaters, and HVAC actuators.
- Powertrain/Chassis: Solenoid and valve actuation (e.g., transmission, exhaust).
- Industrial Automation :
- PLC output modules for actuator and solenoid control.
- Motor drives for conveyor belts, small pumps, and positioning systems.
- Consumer/Appliance :
- White goods (washing machines, dishwashers) for motor and heater control.
- Power distribution in smart home hubs and energy management systems.
### Practical Advantages
- Integrated Protection : Features overcurrent, short-circuit, overtemperature, and overvoltage protection, significantly reducing external component count.
- Advanced Diagnostics : Provides status feedback (via IS pin) for open-load detection, overtemperature prewarning, and fault indication, enabling predictive maintenance.
- Open-load detection works both in on- and off-state.
- Low Quiescent Current : Suitable for always-on, battery-powered applications (e.g., automotive sleep modes).
- EMC Robustness : Designed to meet automotive EMC requirements; includes active slew-rate control to reduce conducted and radiated emissions.
- Space Efficiency : Dual-channel integration in a compact PG-TO-263-7 package reduces PCB footprint.
### Limitations
- Heat Dissipation : Continuous high-current operation requires careful thermal management (heatsinking/PCB copper area). Junction temperature limits operation.
- Voltage Range : Optimized for 12 V automotive systems (4.5 V to 28 V operating); not suitable for higher voltage (e.g., 48 V mild-hybrid) or low-voltage (<3 V) applications without additional circuitry.
- Diagnostic Resolution : Current sense (IS) ratio has tolerance; not intended for precision current measurement.
- Cost Consideration : Higher unit cost than discrete MOSFET solutions, but total system cost may be lower due to reduced protection/diagnostic circuitry.
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## 2. Design Considerations
### Common Design Pitfalls and Solutions
| Pitfall | Consequence | Solution |
|---------|-------------|----------|
| Insufficient heatsinking | Thermal shutdown, reduced reliability, possible destruction under high current. | Use adequate PCB copper area (≥6 cm² per channel on 2-oz copper). Consider external heatsink for continuous high current. |
| Ignoring inductive kickback | Voltage spikes exceeding absolute
