Infineon Technologies BTN7970PAKSA1

Overview

BTN7970PAKSA1 from Infineon Technologies is a high-current PN half-bridge NovalithIC™ integrated power stage comprising a p-channel high-side MOSFET (R_DS(on) ≤ 12.8 mΩ @ 150 °C), n-channel low-side MOSFET (R_DS(on) ≤ 17.7 mΩ @ 150 °C), and monolithic driver IC in a single PG-TO220-7-11 package. It delivers 50 A min / 70 A typ current-limited output, supports 25 kHz PWM with active freewheeling, and targets automotive motor drive applications requiring latch-type overtemperature shutdown and logic-level microcontroller interfacing.

For engineers reviewing the BTN7970PAKSA1 datasheet, BTN7970PAKSA1 pinout, BTN7970PAKSA1 application, or BTN7970PAKSA1 equivalent, key selection criteria include its charge-pump-free p-channel high-side architecture, integrated current sense and status flag diagnostics, adjustable slew rate via external resistor, and AEC-Q100 qualification for under-hood motor control systems.

Technical Context

The BTN7970PAKSA1 implements a monolithic half-bridge topology with physically separate high-side (p-MOS) and low-side (n-MOS) power dies plus a dedicated driver die on a common lead frame. Its logic-level inputs (IN/INH) interface directly with 3.3 V or 5 V MCUs, while dead-time generation and slew-rate adjustment (via SR pin resistor) are handled internally to prevent shoot-through and optimize EMI.

Protection is implemented at silicon level: overvoltage lockout triggers at VS > 45 V, undervoltage shutdown activates below 5.5 V, and overtemperature protection latches at T_j ≥ 150 °C. Current limitation is switched-mode (not linear), with sensing routed to the IS pin for real-time monitoring and fault reporting.

Key Specifications

Pinout & Package

BTN7970PAKSA1 uses the PG-TO220-7-11 package: thermally enhanced through-hole outline with 7 leads, isolated tab for heatsink mounting, and standardized footprint compatible with automated assembly. The package provides low thermal resistance (R_thJC ≤ 1.0 K/W) and meets AEC-Q100 stress requirements.

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 and VNH7040AS, BTN7970PAKSA1 uniquely combines latch-type thermal protection, logic-level inputs, and slew-rate tuning in a ruggedized through-hole package-making it the preferred choice for production automotive modules where field-replaceability and EMC robustness are critical.

Availability

BTN7970PAKSA1 is available at Aetrix Electronics and suitable for electric power steering, HVAC blower control, engine cooling fan drives, and seat actuation systems requiring stable component supply across extended automotive temperature and lifetime requirements.

Supply support for BTN7970PAKSA1 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.

The NovalithIC™ product line delivers integrated high-current power stages combining MOSFETs and drivers in single packages, designed specifically for automotive motor control applications demanding high reliability, compact size, and comprehensive protection.

FAQ

What is the maximum allowable pulse current for BTN7970PAKSA1?

The absolute maximum pulsed drain current is 85 A at T_C < 125 °C for a 10 ms single pulse, as specified in the Absolute Maximum Ratings table. This value assumes proper PCB thermal design and is limited by both current-limit circuitry and thermal constraints-not a continuous rating. Exceeding this may trigger overcurrent protection or cause permanent damage.

How does the IS pin function during normal operation versus fault conditions?

During normal operation, the IS pin outputs an analog voltage proportional to load current (typically 1 V/A). During overcurrent, overtemperature, or short-circuit faults, it switches to open-drain mode and pulls low to assert a status flag. This dual-mode behavior enables both real-time current monitoring and hardware-level fault signaling without additional components.

Can BTN7970PAKSA1 be used in H-bridge configurations?

Yes-two BTN7970PAKSA1 devices can be combined to form a full H-bridge: one controls the high-side left/low-side right legs, the other handles high-side right/low-side left. The integrated dead-time generation prevents shoot-through, and logic-level inputs simplify MCU control. Layout must maintain symmetrical trace lengths and thermal isolation between units.

Is external freewheeling diode required when using BTN7970PAKSA1?

No-BTN7970PAKSA1 features active freewheeling using its internal low-side MOSFET, eliminating the need for external diodes. This reduces board space, improves efficiency (vs. body-diode conduction), and enables precise control of freewheeling timing via the IN/INH logic states.