Infineon Technologies BTN7973BAUMA1

Overview

BTN7973BAUMA1 from Infineon Technologies is a high-current PN half-bridge NovalithIC™ IC integrating one p-channel high-side MOSFET (R_DS(on) ≤ 12.8 mΩ @ 150 °C), one n-channel low-side MOSFET (R_DS(on) ≤ 17.7 mΩ @ 150 °C), and a logic-level driver IC in a single PG-TO263-7-1 package. It delivers up to 55 A PWM current at 20 kHz, features smart clamping overvoltage protection, and enables charge-pump-free motor drive in automotive HVAC blower and power seat applications.

For engineers reviewing the BTN7973BAUMA1 datasheet, BTN7973BAUMA1 pinout, BTN7973BAUMA1 application, or BTN7973BAUMA1 equivalent, key selection criteria include its dual-MOSFET architecture with integrated diagnostics, adjustable slew rate for EMI control, latch-type overtemperature shutdown, and AEC-Q100 qualification for under-hood use.

Technical Context

The device implements a monolithic half-bridge topology with separate HS and LS vertical MOSFETs on a common lead frame, eliminating external charge pump circuitry via p-channel high-side switching. Its driver IC provides dead-time generation, logic-level inputs (IN/INH), and status flag output with current-sense capability (IS pin).

Protection functions operate independently: smart clamping limits VS transients to 40 V during load dump; undervoltage shutdown activates below 4.5 V; overcurrent limiting triggers at ≥50 A (low-side); and thermal shutdown latches at T_j ≥ 150 °C. All protections are designed for fault containment-not continuous operation.

Key Specifications

Pinout & Package

BTN7973BAUMA1 uses the PG-TO263-7-1 package: thermally enhanced surface-mount outline with exposed drain pad (pins 4 and 8 tied internally to OUT), 7-pin configuration, and RoHS-compliant matte-tin plating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current half-bridge motor drive applications.

Compared with BTN7971B, BTN7973BAUMA1 adds current sense and 15 A higher continuous current; versus TPIC2101, it integrates MOSFETs and eliminates external gate-drive components-reducing BOM count and PCB area by ~35% in typical automotive motor modules.

Availability

BTN7973BAUMA1 is available at Aetrix Electronics and suitable for automotive HVAC blower control, power seat motor drive, and steering column adjustment requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for BTN7973BAUMA1 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 is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and quality certification to IATF 16949.

BTN7973BAUMA1 belongs to the NovalithIC™ family-designed specifically for protected, high-efficiency DC motor drives in automotive body electronics where integration, reliability, and EMI robustness are critical.

FAQ

What is the function of the SR pin on BTN7973BAUMA1?

The SR (Slew Rate) pin allows external resistor adjustment of the high-side and low-side MOSFET switching edge rates. Connecting a resistor between SR and GND sets dV/dt to optimize electromagnetic compatibility-lower values reduce EMI but increase switching losses, while higher values improve efficiency at the cost of radiated emissions. Typical resistor values range from 10 kΩ to 100 kΩ.

Does BTN7973BAUMA1 support bidirectional motor control?

No-BTN7973BAUMA1 is a single half-bridge IC and cannot reverse motor polarity alone. Bidirectional control requires two units configured as an H-bridge (one for each leg), with coordinated IN/INH signaling to prevent shoot-through. The device's built-in dead-time generation ensures safe commutation when used in such configurations.

How does the current sense (IS) pin provide diagnostic capability?

The IS pin delivers a 1:2000 scaled analog current proportional to low-side MOSFET conduction, plus an open-drain fault flag that pulls low during overtemperature, overcurrent, or undervoltage events. This dual-function output enables simultaneous real-time load monitoring and hardware-level fault signaling without MCU intervention-critical for ASIL-B–compliant systems.

What thermal derating applies above 125 °C case temperature?

At case temperatures exceeding 125 °C, the continuous output current rating drops linearly from 40 A to zero at 150 °C. This derating is enforced by the latch-type overtemperature protection, which disables outputs until INH is cycled. The device's R_thJC(HS) = 0.6–0.9 K/W and R_thJC(LS) = 1.3–1.8 K/W require a minimum 200 mm² copper pour under the exposed pad for rated performance in natural convection.