Infineon Technologies BTN7970SAKSA1

Overview

BTN7970SAKSA1 from Infineon Technologies is a high-current PN half-bridge NovalithIC™ IC integrating one p-channel high-side MOSFET, one n-channel low-side MOSFET, and a driver IC in a single PG-TO220-7-12 package. It delivers 40 A continuous current at TC < 125 °C, features logic-level inputs, adjustable slew rate, and integrated protection including overtemperature latch, overvoltage lockout, and 50 A min. current limitation-designed for automotive DC motor drives requiring compact, protected PWM control.

For engineers reviewing the BTN7970SAKSA1 datasheet, BTN7970SAKSA1 pinout, BTN7970SAKSA1 application, or BTN7970SAKSA1 equivalent, this device is selected for high-reliability 12 V/24 V brushed motor control where charge-pump elimination, diagnostic current sense, and AEC-Q100 qualification are critical design requirements.

Technical Context

The BTN7970SAKSA1 implements a monolithic half-bridge topology with chip-on-chip integration of HS (p-MOS) and LS (n-MOS) power stages plus driver logic on a common lead frame. Its p-channel high-side eliminates external charge pump circuitry, reducing EMI and board area. The driver includes dead-time generation, status flag output, and configurable slew rate via external resistor on SR pin.

Protection functions operate independently per switch: overcurrent detection triggers active current limiting (not shutdown), while overtemperature causes latched shutdown. Diagnostics include IS pin output proportional to load current and fault status, enabling real-time monitoring without external shunt resistors.

Key Specifications

Pinout & Package

BTN7970SAKSA1 uses the PG-TO220-7-12 package: insulated TO-220 variant with 7 leads, vertical mounting orientation, and exposed drain pad thermally connected to pins 4 and 8 (OUT). The package supports >40 W power dissipation when mounted to ≥100 cm² copper area or external heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTN7970SAKSA1, BTN7960B trades current capacity and automotive qualification for smaller footprint, while VNH7040AS replaces analog IS functionality with digital register access-making BTN7970SAKSA1 optimal where analog current sensing and EMI-tunable switching are primary requirements.

Availability

BTN7970SAKSA1 is available at Aetrix Electronics and suitable for automotive power window systems, industrial conveyor motor drives, electric power steering modules, and medical infusion pump actuation requiring stable component supply across multi-year production cycles.

Supply support for BTN7970SAKSA1 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 ISO/TS 16949 and IATF 16949 standards.

BTN7970SAKSA1 belongs to the NovalithIC™ family-engineered specifically for AEC-Q100-compliant, high-current motor drive applications where integration, protection, and thermal performance are prioritized over programmability.

FAQ

What is the maximum allowable pulse current for BTN7970SAKSA1?

The absolute maximum pulsed drain current is 85 A for 10 ms at TC < 125 °C, per the datasheet's Absolute Maximum Ratings table. However, actual usable pulse current is constrained by the 50 A minimum current limit threshold and thermal limits-sustained pulses above 60 A require active cooling to avoid triggering overtemperature latch.

Does BTN7970SAKSA1 require an external bootstrap capacitor?

No. BTN7970SAKSA1 uses a p-channel MOSFET for the high-side switch, eliminating the need for a bootstrap capacitor or charge pump circuit. This simplifies layout, improves EMI behavior, and ensures reliable high-side gate drive across the full supply range (5.5–28 V).

How is current sensing implemented on the IS pin?

The IS pin provides a proportional current mirror output with 1:200 scaling (e.g., 10 A load → 50 mA IS output), plus an open-drain fault flag pulled low during overtemperature, overvoltage, or short-circuit events. It requires a 1 kΩ pull-up to VS for proper flag operation and a precision shunt resistor for analog readout.

Can BTN7970SAKSA1 be used in H-bridge configurations?

Yes. Two BTN7970SAKSA1 devices can be combined-one for high-side/low-side left leg, another for right leg-to form a full H-bridge. Layout must ensure matched trace lengths and independent IN/INH control per half-bridge to prevent shoot-through; dead time is internally generated per device but inter-device timing coordination remains system-level responsibility.