Infineon Technologies BTS824RNUMA1

Overview

BTS824RNUMA1 from Infineon Technologies AG is a quad-channel smart high-side power switch with integrated protection and diagnostic feedback, designed for 12V/24V automotive and industrial loads. It features four independent N-channel SIPMOS outputs (90 mΩ per channel at 25°C), CMOS-compatible inputs, open-drain status feedback (ST1/2 and ST3/4), and operates across 5.5–40 V_BB. It replaces electromechanical relays in lamp control, solenoid drivers, and ECU power distribution.

For engineers reviewing the BTS824RNUMA1 datasheet, BTS824RNUMA1 pinout, BTS824RNUMA1 application, or BTS824RNUMA1 equivalent, key selection criteria include on-state resistance matching under thermal stress, parallel-channel current derating, open-load detection voltage thresholds, and load-dump protection configuration with external resistors.

Technical Context

The BTS824RNUMA1 integrates two independent Smart SIPMOS chips (Chip 1: Channels 1–2; Chip 2: Channels 3–4) in a single PowerSO-20 package, each with monolithic charge-pump gate drive, thermal shutdown (T_jt = 150°C), and short-circuit current limitation (I_L(SCr) = 12 A per channel). It supports parallel channel operation with shared input/output wiring and wired-OR status feedback.

Its protection architecture includes reverse-battery tolerance (−32 V with external 150 Ω GND resistor), overvoltage clamping (V_ON(CL) = 41–52 V), undervoltage lockout (V_{BB(u_so)} = 4.5 V), and ESD robustness (8 kV HBM on ST pins). Diagnostic functions cover open-load detection (V_OUT(OL) = 1.7–4.0 V) and thermal fault reporting via status pin low assertion.

Key Specifications

Pinout & Package

Package: PowerSO-20 (20-pin exposed-pad SOIC variant with thermal pad, JEDEC MS-013AC compliant). Pin layout optimized for dual-chip isolation: Channels 1–2 share GND1/2 and ST1/2; Channels 3–4 share GND3/4 and ST3/4; V_BB distributed across pins 1, 10, 11, 20 for low-inductance supply routing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar smart high-side power switch applications.

Compared with BTS724G and TPS27082L, the BTS824RNUMA1 uniquely combines quad-channel integration, automotive-grade transient protection (60 V load dump, −32 V reverse battery), and embedded open-load diagnostics-making it the only option qualified for OE BCM lamp-control modules without supplemental protection circuitry.

Availability

BTS824RNUMA1 is available at Aetrix Electronics and suitable for automotive lighting control, industrial solenoid driving, and ECU power distribution requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BTS824RNUMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies AG is a German semiconductor leader specializing in power management, automotive microcontrollers, and industrial sensors-with over 25 years of automotive qualification expertise.

The PROFET™ family, including BTS824RNUMA1, was engineered specifically for automotive body electronics to replace electromechanical relays and discrete protection circuits while meeting AEC-Q100 Grade 1 reliability standards.

FAQ

What is the maximum continuous current per channel at 105°C ambient?

At T_a = 105°C on a 50 mm × 50 mm FR4 PCB with 6 cm² copper, the nominal load current per channel is 3.7 A (derated from 4.7 A at 85°C). This assumes proper thermal design with the exposed pad soldered to the PCB ground plane and no forced airflow.

How is open-load detection implemented in OFF-state?

During OFF-state, an internal 10 µA current source pulls the output toward V_BB; if the load is disconnected, V_OUT rises above V_OUT(OL) (1.7–4.0 V), triggering ST pin assertion after ≤20 µs. A connected resistive load keeps V_OUT near 0 V, preventing false detection.

Can all four channels be paralleled for a single 19 A load?

Yes-inputs (IN1–IN4) and outputs (OUT1–OUT4) may be wired in parallel to achieve 19.0 A nominal current. ST1/2 and ST3/4 must be connected as a wired-OR with a single pull-up resistor to report combined fault status; R_ON drops to 22.5 mΩ (4× parallel).

What external components are mandatory for reverse-battery protection?

A 150 Ω resistor must be placed in series with the GND connection (between GND1/2 and system ground) to limit reverse current during −32 V battery reversal. Without this resistor, the device may suffer irreversible damage due to uncontrolled power dissipation in the intrinsic body diode.