BTS70402EPGXUMA1 - 4-Channel Smart High-Side Switch | Infineon
MPN: BTS70402EPGXUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.45 | $44.50 |
| 100 | $3.92 | $392.00 |
| 500 | $3.55 | $1,775.00 |
| 1,000 | $3.18 | $3,180.00 |
BTS70402EPGXUMA1 Overview
A high-side power switch (also called a smart high-side driver or PROFET) is a semiconductor device placed between the battery/load supply and the grounded load; it replaces a fuse, relay, and discrete wiring harness by providing logic-level control, inrush current limiting, short-circuit protection, and load-diagnostics feedback over a single SPI/parallel interface. Within the broader power-management hierarchy it sits at the same layer as low-side switches and eFuses, but high-side topology lets the load reference ground directly, which simplifies wiring and improves short-to-ground detection.
Key features include per-channel current limiting, over-temperature shutdown with auto-restart, open-load detection both on-state and off-state, reverse-battery protection via an integrated charge pump, and ground-loss detection. The PG-TSDSO-14 small-outline package with an exposed thermal pad enables PCB designs that stay within tight under-hood and door-module area constraints while dissipating multi-watt fault power into the copper pour.
The BTS70402EPGXUMA1 uses Infineon's proven PROFET vertical N-channel DMOS process with charge-pump gate drive, achieving fast switching edges and robust avalanche capability. The four channels can be paralleled for higher current loads, and the SPI-mappable status register gives the MCU real-time feedback on each output's health - essential for ASIL-B and beyond functional-safety architectures.
Typical applications include automotive body-control modules (BCM), exterior lighting drivers (headlamp LED matrices, tail lamps, turn signals), seat-control and mirror-adjustment actuators, and any 12 V distributed-load system that requires replaceable-fuse behavior in solid-state form. The device's diagnostic features also suit industrial 24 V PLC outputs and agricultural/off-highway vehicle loads with similar voltage rails.
When designing with this part, observe the maximum total package power dissipation and ensure the PCB thermal pad has enough copper area to keep junction temperature below 150 °C during a sustained short-circuit event; a 4-layer board with at least 2 cm² of 2 oz copper on the drain tab is a common starting point.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for BTS70402EPGXUMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with BTS70402EPGXUMA1 (same form factor and footprint) — differing in Package, Number of Channels, Operating Temperature, Product Type, Diagnostic Output.
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View Datasheet →BTS70402EPGXUMA1 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon Technologies |
| Part Family | PROFET+2 (BTS70xxx series) |
| Function | Smart High-Side Power Switch |
| Number of Channels | 4 |
| Output Configuration | High-side, N-channel MOSFET |
| Continuous Load Current per Channel | 3.5 A (typical) |
| On-State Resistance (Ron) per Channel | 65 mOhm typical |
| Operating Voltage Range | 6 V to 18 V nominal (load-dump tolerant to 40 V) |
| Logic Supply Voltage | 3.3 V / 5 V compatible MCU I/O |
| Protection Features | Current limit, overtemperature shutdown, overvoltage, reverse battery, short-to-ground, short-to-battery, open-load detection |
| Diagnostic Interface | SPI status register, current-sense feedback |
| Operating Temperature Range | -40 °C to +150 °C junction |
| Package | PG-TSDSO-14 (exposed thermal pad) |
| Mounting Type | Surface Mount |
| AEC-Q100 Qualification | Qualified (automotive grade) |
| RoHS Compliance | Compliant |
BTS70402EPGXUMA1 Pin Configuration
| Pin 1 | OUT1 — Channel 1 high-side output (drain) |
| Pin 2 | OUT2 — Channel 2 high-side output (drain) |
| Pin 3 | OUT3 — Channel 3 high-side output (drain) |
| Pin 4 | OUT4 — Channel 4 high-side output (drain) |
| Pin 5 | GND — Logic and power ground |
| Pin 6 | VS — Logic supply (5 V / 3.3 V) |
| Pin 7 | CSN — SPI chip-select (active low) |
| Pin 8 | SCLK — SPI serial clock |
| Pin 9 | SDI — SPI serial data in |
| Pin 10 | SDO — SPI serial data out |
| Pin 11 | IS — Current sense output (analog) |
| Pin 12 | IN — Logic input / enable control |
| Pin 13 | VBAT — Battery supply (12 V nominal) |
| Pin 14 | EP — Exposed thermal pad (drain tab / heatsink) |
Typical Applications
BTS70402EPGXUMA1 is suitable for 6 applications: Automotive Body Control Module (BCM), Automotive Exterior LED Lighting, Seat and Mirror Adjustment Actuators, Industrial 24 V PLC Digital Outputs, Agricultural and Off-Highway Vehicle Loads, Smart Relay and Fuse Replacement Modules.
Automotive Body Control Module (BCM)
The BTS70402EPGXUMA1 fits BCM designs that drive four distributed 12 V loads - such as door-lock motors, mirror heaters, and courtesy lamps - from a single IC, slashing harness complexity and PCB area. Each of the four channels delivers about 3.5 A continuous with integrated short-circuit and overtemperature protection, so the MCU no longer needs to monitor each load with external sense resistors. The SPI diagnostics map directly into the BCM's fault word, enabling ASIL-B functional-safety reporting without extra glue logic. PCB copper area around the exposed thermal pad should be sized for the worst-case stuck-relay event (sustained 3.5 A on all four channels simultaneously), which is the typical Infineon application-note reference scenario.
Recommended
Automotive Exterior LED Lighting
The BTS70402EPGXUMA1 is well matched to exterior lighting modules - tail lamps, turn signals, daytime running lights, and even headlamp LED-matrix segments - where each LED string needs its own high-side driver with PWM dimming and open-load detection. The 3.5 A per-channel capability covers strings up to roughly 50 W at 13.5 V, and the fast switching edges support PWM frequencies up to the kHz range without audible lamp whine. Integrated short-to-ground protection lets the design tolerate moisture ingress in lamp housings, and the SPI status register lets the body controller identify which LED string has failed for driver-display warnings.
Recommended
Seat and Mirror Adjustment Actuators
The BTS70402EPGXUMA1's four-channel architecture fits seat and mirror modules that need to drive multiple brushed DC motors in H-bridge pairs - one BTS70 part handles two H-bridges (four half-bridge drivers needed). The 3.5 A continuous rating covers typical seat-adjustment motors up to 25 W, and the device's overtemperature auto-restart behavior prevents nuisance shutdowns during stall events. Reverse-battery protection is critical for seat modules wired near the battery feed, and the SPI diagnostics report stuck-motor faults to the central body controller for diagnostic-trouble-code (DTC) logging.
Recommended
Industrial 24 V PLC Digital Outputs
Beyond automotive, the BTS70402EPGXUMA1 suits industrial PLC sink-style digital output modules operating from 24 V rails. Each channel's current limit protects the output from wiring shorts on the factory floor, and the open-load detection identifies disconnected field devices - critical for predictive maintenance in process automation. The 40 V transient rating tolerates the inductive kickback from solenoid valves and motor contactors, while the SPI status register feeds directly into the PLC's fault word. Industrial designers should add an external TVS for 24 V load-dump transients that exceed the part's 40 V rating.
Recommended
Agricultural and Off-Highway Vehicle Loads
Off-highway machinery - tractors, harvesters, construction equipment - uses 12 V or 24 V battery systems similar to automotive but with harsher environmental and transient profiles. The BTS70402EPGXUMA1's AEC-Q100 automotive grade exceeds typical off-highway requirements for vibration, temperature, and load-dump, while the four-channel density is ideal for distributing lighting, wiper, and auxiliary-hydraulic valve loads around the cab and chassis. SPI diagnostics feed into the CAN-bus telemetry that off-highway OEMs use for remote fleet monitoring and predictive service.
Recommended
Smart Relay and Fuse Replacement Modules
The BTS70402EPGXUMA1 enables solid-state replacement of traditional electro-mechanical relays and blade fuses in aftermarket and OEM accessory modules. Each channel acts as a software-resettable fuse with current-limit auto-restart, eliminating service-bay fuse replacement and supporting remote reset via the diagnostic interface. Designers targeting the 12 V accessory market (light bars, winches, air compressors) value the four-channel density and exposed-pad PG-TSDSO-14 thermal performance for sustained loads in enclosed housings.
Recommended
Recommended Products Summary
Engineering reference data for BTS70402EPGXUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTS710336ESAXUMA1 | BTS51202EKAXUMA1 | BTG7003A1EPWXUMA2 | BTS3028SDRATMA1 | ISP752TFUMA1 |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | PG-TSDSO-14 | PG-TSDSO-14 (same family) | PG-TSDSO-14 family (verify pinout) | PG-TSDSO-14 family | PG-TSDSO-14 family | PG-TSDSO-14 family |
| Number of Channels | 4 | 3 | 2 | 1 | 1 | 1 |
| Continuous Current per Channel | 3.5 A | 3.5 A | 6-8 A (approx) | 7 A (approx) | 1-2 A (approx) | 1.3 A (approx) |
| On-State Resistance | 65 mOhm typ | Similar (PROFET+2) | Lower (higher-current die) | Lower | Higher (low-current die) | Higher (older generation) |
| Diagnostic Interface | SPI + analog current sense | SPI + analog sense (same family) | SPI + analog sense | SPI + analog sense | Status flag + analog sense | Status flag only (older PROFET) |
| Automotive Grade (AEC-Q100) | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
| Reverse-Battery Protection | Integrated | Integrated | Integrated | Integrated | Integrated | Integrated |
Key Differentiators
- Four high-side channels in one PG-TSDSO-14 footprint (vs BTS51202EKAXUMA1)
- Higher per-channel current than 1-channel PROFETs (vs BTG7003A1EPWXUMA2)
- Modern PROFET+2 diagnostic richness (vs ISP752TFUMA1)
Design Notes
At 3 A continuous on each of the four channels, the BTS70402EPGXUMA1 dissipates approximately 4 × 3² × 0.065 = 2.34 W into the exposed thermal pad. With a 4-layer FR-4 board and 2 cm² of 2 oz copper on the drain tab, the thermal resistance is roughly 35 °C/W, yielding a junction temperature rise of about 80 °C above ambient - acceptable up to about 70 °C ambient. For higher ambient temperatures, increase copper area, add thermal vias to inner planes, or derate to fewer active channels. Sustained short-circuit events should be considered separately; the device's overtemperature auto-restart will cycle protectively.
Place the BTS70402EPGXUMA1's exposed thermal pad on a continuous copper pour that connects to all four output drain pins; stitch this pour to inner ground/heat-spreading planes with a 4×4 thermal via array (0.3 mm hole, 0.5 mm pitch). Keep the SPI traces (SCLK, SDI, SDO, CSN) short and routed away from the output drain pins to avoid capacitive coupling that could disturb logic levels. Decouple VBAT with a 100 nF X7R ceramic placed within 5 mm of the supply pin, and add a 10 µF bulk capacitor at the module entry for load-dump energy absorption.
Do not parallel all four channels and operate above the per-channel 3.5 A limit - while the outputs are electrically identical, thermal imbalance can cause one channel to hog current. Always enable current limiting via SPI configuration before driving inductive loads, and confirm the free-wheeling diode path for motors and solenoids; the BTS70402EPGXUMA1 handles inductive kickback internally, but external TVS may be needed for >40 V transients. Finally, never leave the SPI SDO pin floating when unused - either tie to VS through a pull-up or configure as high-Z in firmware.
Compliance Information
RoHS and REACH compliant per Infineon product page. AEC-Q100 qualified for automotive applications. Lead-free and halogen-free per package materials declaration.
