Infineon Technologies BTN7933BAUMA1

Overview

BTN7933BAUMA1 from Infineon Technologies is a high-current PN half-bridge NovalithIC™ IC integrating one p-channel high-side MOSFET (R_DS(on) ≤ 17 mΩ @ 150 °C), one n-channel low-side MOSFET (R_DS(on) ≤ 38 mΩ @ 150 °C), and a logic-level driver with diagnostics in a single PG-TO263-7-1 package. It delivers up to 20 A continuous output, supports PWM up to 25 kHz, and operates from 4.5 V to 28 V - designed for automotive motor drive applications including radiator fan and HVAC blower control.

For engineers reviewing the BTN7933BAUMA1 datasheet, BTN7933BAUMA1 pinout, BTN7933BAUMA1 application, or BTN7933BAUMA1 equivalent, key selection considerations include its integrated smart clamping overvoltage protection, latch-type overtemperature shutdown, adjustable slew rate via external resistor, current sense output (IS), and dual-channel fault diagnosis with status flag capability.

Technical Context

The BTN7933BAUMA1 implements a monolithic half-bridge architecture using chip-on-chip and chip-by-chip mounting on a common lead frame, eliminating the need for an external charge pump due to its p-channel high-side switch. Its driver IC integrates dead-time generation, undervoltage lockout (V_UV(OFF) ≤ 4.5 V), and active freewheeling control.

Protection functions operate independently per channel: short-circuit detection triggers within 2 µs, current limitation is set at 20 A min / 32 A typ (low-side), and thermal shutdown latches at T_j ≥ 150 °C. The IS pin provides proportional analog current sensing (1:2000) and digital status flag output.

Key Specifications

Pinout & Package

BTN7933BAUMA1 uses the PG-TO263-7-1 package: thermally enhanced surface-mount outline with 7 leads, exposed copper pad for thermal dissipation, and lead-free RoHS-compliant finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTN7933BAUMA1, BTN7960B offers superior thermal performance for sustained high-current operation, while VNS7NV04PTR-E sacrifices integration and diagnostics for minimal BOM count - making BTN7933BAUMA1 optimal for cost-sensitive, functionally safe, bidirectional automotive motor drives requiring embedded diagnostics.

Availability

BTN7933BAUMA1 is available at Aetrix Electronics and suitable for radiator fan control, HVAC blower drive, power seat actuation, and electric power steering assist requiring stable component supply across automotive production lifecycles.

Supply support for BTN7933BAUMA1 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 AEC-Q100 and IATF 16949 standards.

The NovalithIC™ product line delivers integrated high-current half-bridges combining MOSFETs and drivers in single packages - engineered specifically for robust, space-constrained automotive motor control applications demanding functional safety and long-term reliability.

FAQ

What is the purpose of the SR pin on BTN7933BAUMA1?

The SR (Slew Rate) pin accepts an external resistor to ground that controls the gate drive strength for both high- and low-side MOSFETs. This adjusts the voltage transition speed at the OUT node, directly influencing electromagnetic interference (EMI) emissions and switching losses. Typical resistor values range from 10 kΩ (fastest) to 100 kΩ (slowest), with design validation required per EN 55025 Class 5 limits.

Does BTN7933BAUMA1 support bidirectional motor control?

BTN7933BAUMA1 is a single half-bridge and cannot by itself reverse motor polarity. However, two units can be combined into a full H-bridge configuration - one controlling the high-side of each leg and the other the low-side - enabling full bidirectional control. This is explicitly supported in the datasheet's application examples and requires coordinated IN/INH timing to avoid shoot-through.

How does the IS pin provide both current sensing and fault indication?

The IS pin outputs a proportional analog current (1:2000 scaling of load current) under normal operation. When any fault occurs - overtemperature, short circuit, or undervoltage - the pin transitions to a low-impedance logic-low state while simultaneously disabling the analog output. This dual-mode behavior allows a single MCU ADC input and GPIO interrupt pin to monitor both operational current and fault status without additional components.

Is BTN7933BAUMA1 qualified for automotive use?

Yes, BTN7933BAUMA1 is AEC-Q100 qualified (Grade 1: -40 °C to +125 °C ambient) and designed for automotive powertrain and chassis applications. It meets ISO 7637-2 load dump (40 V pulse), ISO 16750-2 supply voltage variation, and EMC requirements per CISPR 25 Class 5 when implemented with recommended layout practices and external filtering.