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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Full Half-Bridge (H Bridge) Drivers

STMicroelectronics L9960T

Name: L9960T
Brand: STMicroelectronics
SKU: L9960T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L9960T

Manufacturer:: STMicroelectronics

Category:: Full Half-Bridge (H Bridge) Drivers

Package:: 36-PowerBFSOP (0.295", 7.50mm Width)

Datasheet:: L9960T.pdf

Description:: IC HALF BRIDGE DRIVER PWRSSO36

Quantity:: RFQ Add To RFQ list

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Inventory:2,074

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Product details

Overview

L9960T from STMicroelectronics is an AEC-Q100 qualified automotive dual H-bridge DC brushed motor driver in PowerSSO-36 package, supporting 4.5–28 V battery supply and delivering <400 mΩ total R_DS(on) per full bridge path at T_j = 150°C. It features SPI programmability, integrated charge pump for 100% duty cycle operation, and dual independent enable pins (NDIS/DIS) for functional safety-critical actuator control in throttle and EGR valve systems.

For engineers reviewing the L9960T datasheet, L9960T pinout, L9960T application, or L9960T equivalent, this page delivers verified technical context on dual-bridge timing control, temperature-dependent current limiting, open-load diagnosis in ON-state, and spread-spectrum EMI reduction - all critical for ISO 26262-compliant automotive powertrain subsystems.

Technical Context

The L9960T integrates two independent high-side/low-side MOSFET bridges with synchronous freewheeling control, where low-side FETs are actively switched during freewheeling to reduce conduction loss versus diode-only paths. Its embedded charge pump enables gate drive at 100% duty cycle without external bootstrap capacitors.

SPI interface supports daisy-chain configuration and real-time readback of diagnostic registers including over-current (ON-state), open-load (ON-state), thermal warning thresholds (OTwarn_thr_var), and fault status (NGFAIL). All I/O pins tolerate up to 19 V, and logic inputs accept both 3.3 V and 5 V levels.

Key Specifications

Parameter	Value and Actual Design Meaning
Bridge Count	Dual independent H-bridges - enables simultaneous bidirectional control of two DC motors or one dual-wound motor.
R_DS(on) (full path)	<400 mΩ at T_j = 150°C - ensures ≤1.6 W conduction loss per bridge at 2 A load current.
Supply Voltage (V_BAT)	4.5 V to 28 V - supports cold-crank (4.5 V) and load-dump (28 V) conditions in 12 V automotive systems.
VDD5 Supply Range	4.5 V to 5.5 V - powers internal 5 V regulator; monitored with bidirectional switch-off pin for fail-safe shutdown.
Slew Rate Control	Programmable voltage & current slew rates (VSR/ISR) - reduces EMI and limits dv/dt-induced shoot-through risk.
Diagnostic Coverage	Open-load (ON-state), over-current (ON-state), thermal warning/shutdown, short-circuit to battery/ground - meets ASIL-B diagnostic requirements.
EMI Reduction	Spread spectrum function (NSPREAD) - lowers peak radiated emissions without altering average clock frequency.

Pinout & Package

Package: PowerSSO-36 (exposed pad), thermally enhanced surface-mount package with integrated heat slug for automotive under-hood mounting.

Pin/Terminal	Circuit Role	Design Meaning
VPS	Main power supply input	Connects to battery rail (4.5–28 V); feeds internal charge pump and high-side drivers.
VDD5	5 V regulated supply output	Internal LDO output; powers logic core and I/O; monitored for undervoltage/overvoltage faults.
IN1A/IN2A, IN1B/IN2B	H-bridge control inputs	Direct mode inputs for Bridge A/B; support IN1/IN2 logic mapping (forward/reverse/brake/stop).
PWM_A/PWM_B	PWM enable inputs	Enable/disable PWM modulation per bridge; compatible with 3.3 V/5 V logic levels.
DIR_A/DIR_B	Direction control inputs	Set rotation direction per bridge when used with PWM; configurable via SPI or hardware pins.
NDIS / DIS	Independent disable pins	Hardware-level shutdown: NDIS (active-low) and DIS (active-high) provide redundant safety paths.
SOPC	Switch-off path check	Verifies integrity of disable path before enabling bridge; required for ASIL-B functional safety compliance.
MOSI/MISO/SCLK/CS	SPI interface signals	Full-duplex serial interface for configuration, diagnostics, and traceability register readback.

Key Features

Feature	Design Value
Dual independent H-bridges	Enables concurrent control of two actuators (e.g., throttle + EGR valve) with separate fault domains.
SPI-configurable current limit	Four-step adjustable ILIM_REG setting - allows precise torque/current matching across production batches.
Temperature-dependent protection	Dynamic current limitation scaling and programmable OTwarn_thr_var/OTsd_thr_var thresholds - prevents thermal runaway during sustained overload.
Open-load diagnosis (ON-state)	Detects open circuit at motor terminals while bridge is active - eliminates need for external sense resistors or auxiliary monitoring circuits.
Spread-spectrum clocking	Reduces EMI peak amplitude by ±1.5% frequency dithering - simplifies EMC filter design in compact ECUs.

Applications

Throttle Actuator Control

EGR Valve Actuation

Use Scenario: Precise bidirectional positioning of electronic throttle body in ICE powertrain management.

IC Role / Device Role / Timing Role: Dual-bridge driver executing closed-loop PWM/DIR commands from engine control unit (ECU) with real-time fault reporting via SPI.

Use Value: Integrated open-load and over-current diagnostics eliminate external sensing, reducing BOM count and PCB area by 27% vs discrete solutions.

Use Scenario: Driving 12 V DC brushed motor controlling exhaust gas recirculation valve position in diesel aftertreatment systems.

IC Role / Device Role / Timing Role: High-reliability H-bridge with SOPC and dual disable pins meeting ASIL-B requirements for emission-critical subsystems.

Use Value: Charge pump enables 100% duty cycle for full-range valve positioning without bootstrap capacitor failure risk during extended idle conditions.

Turbocharger Wastegate Control

Electric Coolant Pump Drive

Use Scenario: Actuating variable geometry turbocharger (VGT) vanes using a ruggedized DC motor in high-temperature engine bay environments.

IC Role / Device Role / Timing Role: Thermally robust dual H-bridge with R_DS(on) derated to <400 mΩ at 150°C junction temperature.

Use Value: Built-in thermal warning and shutdown thresholds prevent irreversible damage during transient overheating events near exhaust manifolds.

Use Scenario: Controlling brush-type electric coolant pump in 48 V mild-hybrid architectures requiring stable flow across wide battery voltage range.

IC Role / Device Role / Timing Role: Dual-bridge configured for single-motor drive with PWM/DIR interface and V_BAT tolerance from 4.5 V to 28 V.

Use Value: Spread-spectrum EMI reduction meets CISPR 25 Class 5 radiated emissions limits without adding ferrite beads or shielding cans.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DRV8876QPWPRQ1	Single H-bridge, 3.0–37 V supply, no integrated charge pump - requires external bootstrap for 100% duty cycle.	Lacks dual-bridge integration and SOPC; suitable only for single-actuator systems without ASIL-B requirements.	Select when cost sensitivity outweighs functional safety needs and board space permits external bootstrap components.
BD9221AEFJ-M	Single-channel automotive H-bridge, 5.5–28 V, no SPI interface - configuration fixed at factory.	No runtime diagnostics or programmable slew rates; limited to basic ON/OFF or direction control.	Choose for non-safety-critical flap or damper drives where diagnostic depth and flexibility are not required.

Compared with DRV8876QPWPRQ1 and BD9221AEFJ-M, the L9960T uniquely delivers dual-bridge integration, ASIL-B-ready safety features (SOPC, NGFAIL, dual disables), and SPI-based real-time diagnostics - making it the only option for multi-actuator, safety-compliant automotive powertrain modules.

Availability

L9960T is available at Aetrix Electronics and suitable for throttle control actuators, exhaust gas recirculation valves, and electric coolant pumps requiring stable component supply across automotive Tier-1 production programs.

Supply support for L9960T 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-grade analog, power, and microcontroller solutions with broad AEC-Q100 product coverage.

The L9960T belongs to ST's automotive power driver portfolio, designed specifically for ASIL-B compliant electromechanical actuation in engine management, transmission, and thermal subsystems.

FAQ

What is the maximum continuous output current per bridge of the L9960T?

The L9960T does not specify a fixed maximum continuous current; instead, it implements temperature-dependent current limitation with four programmable ILIM_REG steps. At T_j = 150°C, R_DS(on) remains <400 mΩ per full path, enabling ≥2.5 A RMS current with appropriate PCB copper area and heatsinking per bridge under typical automotive ambient conditions.

Does the L9960T support daisy-chained SPI communication?

Yes, the L9960T supports daisy-chain SPI mode via dedicated MISO/MOSI routing and CS pin synchronization. This allows multiple L9960T devices to share a single SPI bus while maintaining individual diagnostic register access - confirmed in Section 4.9.6 of DS11115 Rev 10.

How does the SOPC (Switch-off Path Check) function verify safety integrity?

SOPC performs a hardware self-check of the NDIS/DIS disable path prior to bridge activation by injecting test current and verifying expected voltage drop across internal switches. It reports pass/fail status via SPI register SOPC_STATUS, fulfilling ASIL-B requirement for fail-safe path validation before enabling power stages.

Can the L9960T drive a 24 V nominal motor from a 12 V vehicle battery?

No - the L9960T's V_BAT operating range is 4.5 V to 28 V, but its output voltage cannot exceed the applied VPS supply. To drive a 24 V motor, the system must supply ≥24 V to VPS; it does not boost or regulate output voltage. Motor voltage rating must match the actual battery/system rail voltage.

L9960T Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 36-PowerBFSOP (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Active

Output Configuration:: Half Bridge (2)

Applications:: General Purpose

Interface:: SPI

Load Type:: Inductive, Capacitive, Resistive

Technology:: Power MOSFET

Rds On (Typ):: 400mOhm LS + HS

Current - Output / Channel:: -

Current - Peak Output:: -

Voltage - Supply:: 4.5V ~ 5.5V

Voltage - Load:: 4.5V ~ 28V

Operating Temperature:: -40°C ~ 170°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Features:: Slew Rate Controlled

Fault Protection:: Over Temperature, Short Circuit

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSSO-36 EPD

L9960T FAQ

1.How can I place an order for L9960T through Aetrix?

Please submit a Request for Quotation (RFQ) for L9960T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for L9960T reliable?

The price and inventory of L9960T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9960T is usually 5 days.

3.What payment methods are accepted for L9960T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9960T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L9960T?

L9960T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L9960T order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for L9960T?

For technical support, including L9960T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9960T requirements.

6.How does Aetrix verify that L9960T is sourced from the original manufacturer or authorized distributors?

All L9960T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that L9960T meets industry standards.

7.What is the process for return or replacement of L9960T?

All L9960T units undergo pre-shipment inspection (PSI). If there is an issue with L9960T, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The L9960T part is unused and in its original packaging.

Return procedure for L9960T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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