STMicroelectronics L9997ND013TR

Overview

L9997ND013TR from STMicroelectronics is a dual half-bridge driver IC in MultiPower BCD technology, designed for automotive DC motor control. It delivers ±1.2A continuous output current per channel, features 0.7Ω typical R_ON, operates from 7V to 16.5V supply, and integrates real-time thermal/overvoltage diagnostics via open-drain DIAG pin - used in power seat actuation and HVAC blower systems.

For engineers reviewing the L9997ND013TR datasheet, L9997ND013TR pinout, L9997ND013TR application, or L9997ND013TR equivalent, key selection criteria include standby current <1µA, CMOS-compatible Schmitt-trigger inputs with 1V hysteresis, tristate enable control, short-circuit protection up to 40V transient, and SO20 (12+4+4) thermal-enhanced package with dedicated GND pins for heatsinking.

Technical Context

The L9997ND013TR implements two independent half-bridge drivers with integrated high-side and low-side DMOS power transistors. Each channel supports SRC (source) and SNK (sink) configurations controlled by non-inverting IN1/IN2 logic with internal 10µA sink bias, enabling open-input default to SNK state.

It embeds supply overvoltage protection (19V typ. threshold), thermal shutdown at ≥150°C junction temperature with 25K hysteresis, and real-time diagnostic feedback via open-drain DIAG output. Output current regulation activates above ±1.2A, limiting peak current to ≤2.2A under pulse conditions while maintaining linear R_ON behavior below that threshold.

Key Specifications

Pinout & Package

Package: SO20 (12+4+4) thermally enhanced surface-mount package with 12 main signal pins, 4 GND pins (pins 4–7, 14–17), and 4 VS supply pins (pins 1, 12, 19, and NC-connected VS pads). GND pins serve as both signal reference and thermal interface.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual half-bridge motor driver applications.

Compared with VNHD7008AYTR and BTS716G, the L9997ND013TR uniquely integrates dual half-bridge topology, real-time overvoltage/overtemperature diagnostics, and automotive-grade thermal resilience in a single SO20 package - eliminating external protection components and simplifying functional safety compliance for bidirectional motor control.

Availability

L9997ND013TR is available at Aetrix Electronics and suitable for automotive power seat actuation, HVAC blower control, and window lift mechanisms requiring stable component supply across extended production lifecycles.

Supply support for L9997ND013TR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with broad manufacturing scale and AEC-Q100 qualification expertise.

The L9997ND013TR belongs to ST's Automotive Power Switches & Drivers product line, engineered specifically for robust, integrated motor control in harsh-temperature, high-reliability vehicle subsystems - not general-purpose switching.

FAQ

What is the maximum allowable supply voltage transient for L9997ND013TR?

The device withstands supply voltage pulses up to 40V for durations less than 400ms per absolute maximum ratings. Its overvoltage protection triggers at 19V (typical), forcing outputs into tristate and pulling DIAG low. This dual-layer protection - rated transient tolerance plus active disable - ensures survival during ISO 7637-2 Load Dump events without external TVS clamping in many designs.

How does the L9997ND013TR handle floating input pins?

Each IN1 and IN2 input includes an internal 10µA sink current generator active only when EN is HIGH. With no external pull-up/down, this sink pulls the pin to logic LOW, resulting in SNK output state. In standby (EN LOW), the sink is disabled, leaving inputs truly high-impedance - requiring external biasing if needed. This eliminates external pull-down resistors in most automotive applications.

Can the DIAG pin be wire-OR'd with other L9997ND013TR devices?

Yes - the open-drain DIAG output supports wired-OR connection across multiple L9997ND013TR units using a single external 5V pull-up resistor. The internal current limit ensures safe parallel operation. When any device detects overvoltage or overtemperature, its DIAG pin pulls the shared line low, allowing centralized fault detection by one MCU GPIO without additional logic.

What thermal derating applies above 85°C ambient?

With R_{th j-amb} = 50K/W (6cm² heatsink), junction temperature rise is ~60K at 1.2A per channel (P_tot ≈ 2 × 1.2² × 0.7 = 2.0W). At 85°C ambient, T_j ≈ 145°C - within 150°C shutdown limit. Above 85°C, output current must be reduced to maintain T_j < 150°C; e.g., at 105°C ambient, max continuous current drops to ~0.9A per channel based on thermal margin.