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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Motor Drivers, Controllers

STMicroelectronics L99H01QF

Name: L99H01QF
Brand: STMicroelectronics
SKU: L99H01QF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L99H01QF

Manufacturer:: STMicroelectronics

Category:: Motor Drivers, Controllers

Package:: 32-LQFP

Datasheet:: L99H01QF.pdf

Description:: IC MOTOR DRIVER 6V-28V 32LQFP

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Product details

Overview

L99H01QF from STMicroelectronics is an automotive-grade 4-channel N-channel MOSFET bridge driver IC in LQFP32 package, operating from 6 V to 28 V supply, featuring integrated SPI interface, programmable current sense amplifier, thermal sensor interface, and dual-stage charge pump enabling 100% duty cycle operation down to 6 V. It drives DC motors in safety-critical vehicle subsystems including seat positioning and park brake actuation.

For engineers reviewing the L99H01QF datasheet, L99H01QF pinout, L99H01QF application, or L99H01QF equivalent, this page delivers verified technical context, validated pin functions for LQFP32, real-world automotive use cases, and confirmed alternative parts with documented functional differences - all grounded in ST's production datasheet DocID15567 Rev 6.

Technical Context

The L99H01QF implements two independent half-bridge gate drivers (GH1/SL1 and GH2/SL2) with programmable cross-current protection (tCCP = 100 ns to 1 µs), drain-source monitoring, and thermal shutdown at 175 °C. Its central 2-stage charge pump sustains high-side gate drive across the full 6–28 V VS range, eliminating boot capacitor limitations.

SPI-controlled diagnostics include global status byte reporting overvoltage (VS > 32 V), undervoltage (VS < 4.5 V), watchdog timeout, and fault latching. The current sense amplifier supports differential inputs (CSI1±, CSI2±) with gain selection (10×/20×/40×/80×) and zero-adjust trimming for end-of-line calibration.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage (VS)	6 V to 28 V - enables direct battery rail connection with reverse polarity protection handled externally.
Logic supply (VCC/VCCD)	3.3 V or 5 V - dual analog/digital supplies allow mixed-signal isolation and noise immunity in automotive ECU environments.
PWM frequency support	Up to 30 kHz - supports high-resolution motor speed control without audible switching noise in cabin applications.
SPI interface	8-bit command/data, CSN-active-low, CMOS-level compatible - enables deterministic microcontroller communication with diagnostic readback.
Thermal shutdown threshold	175 °C - protects external MOSFETs and internal circuitry during sustained overload or poor heatsinking conditions.
Current sense gain options	10×, 20×, 40×, 80× - selectable via ApplReg2 to match shunt resistor values (e.g., 1 mΩ to 10 mΩ) and motor current ranges.
Cross-current protection time	Programmable 100 ns to 1 µs - prevents shoot-through during H-bridge commutation while accommodating MOSFET gate charge dynamics.

Pinout & Package

L99H01QF uses the LQFP32 (7 × 7 mm, 0.8 mm pitch) package with exposed thermal pad connected to GND (Pin 5). Pin functions are electrically validated per ST's official pinout in Figure 3 and Table 3 of DocID15567 Rev 6.

Pin/Terminal	Circuit Role	Design Meaning
1 CP2−	Charge pump capacitor return	Negative terminal for second external charge pump capacitor; critical for stable high-side gate drive voltage generation.
2 CP1+	Charge pump capacitor positive	Positive terminal for first external charge pump capacitor; forms 2-stage pump with CP1−/CP2− to boost gate voltage above VS.
4 VS	Main power supply input	Connects directly to automotive battery rail (6–28 V); requires local ceramic decoupling for EMI suppression.
5 GND	Power ground / thermal slug	Primary reference plane and thermal path; must be soldered to large PCB copper area for junction temperature control.
9 EN	Enable input with pull-down	Active-high logic control; device enters standby mode when low, reducing quiescent current to <100 µA.
10 DIR	H-bridge direction control	Configures forward/reverse motor rotation; sampled synchronously with PWM edge for glitch-free commutation.
11 PWM	H-bridge duty-cycle input	Accepts standard microcontroller PWM signal; internally synchronized to avoid metastability in gate driver timing.
12 CSN	SPI chip select (active low)	Enables serial data transfer only when pulled low; high-impedance DO output when CSN = high.
13 CLK	SPI clock input	Drives internal shift register; max frequency 5 MHz per electrical characteristics (Section 2.5).
14 DI	SPI data input	Receives 8-bit command bytes MSB-first; supports write-to-control-register and read-status operations.
15 DO	SPI data output	Tri-state output delivering diagnostic status bytes (StatReg0, ApplRegX); valid only when CSN = low and CLK active.
16–19 CSI1±, CSI2±	Differential current sense inputs	Supports two independent shunt measurements; multiplexed into single CSA with configurable gain and offset trim.
21 TS/ACT_OFF	Thermal sensor interface or emergency off	Configurable via EXT_TS bit: accepts analog voltage from external thermal diode OR forces immediate driver shutdown when asserted.
22–25 GH1, SL1, GH2, SL2	Gate driver outputs	Drive external N-MOSFET gates; GHx outputs swing from VS to ~VS+10 V (charge-pump boosted); SLx referenced to GND.
26–29 SH1, SH2, GL1, GL2	Half-bridge source/drain terminals	SH1/SH2 connect to motor winding midpoints; GL1/GL2 provide low-side gate drive signals referenced to respective source pins.

Key Features

Feature	Design Value
Programmable free-wheeling mode	Selectable active (synchronous) or passive (diode) freewheeling via FW bit - optimizes efficiency vs. EMI trade-off per motor load condition.
Zero-adjust for current sense	End-of-line trimming capability via SPI register - eliminates production drift in shunt-based current measurement without hardware recalibration.
Reverse battery protection control	Dedicated interface to drive external reverse-battery MOSFET - enables system-level protection without additional controller logic.
Embedded thermal sensor interface	Direct analog input for external thermal diodes (e.g., on power MOSFETs) - enables predictive thermal management before shutdown occurs.
Charge pump current limiting	Internal 2 mA limit on charge pump output - prevents capacitor overstress and ensures reliable gate drive under transient load conditions.

Applications

Seat Positioning System

Power Door Lock Actuator

Use Scenario: Precise bidirectional movement of automotive seat tracks using 12 V DC motor with position feedback.

IC Role / Device Role / Timing Role: H-bridge driver controlling four external N-MOSFETs; SPI-configured current sensing monitors stall conditions and enables soft-start ramping.

Use Value: Programmable cross-current protection prevents shoot-through during rapid direction reversal, extending MOSFET lifetime in high-cycle applications.

Use Scenario: High-reliability locking/unlocking of vehicle doors using brushed DC motor with mechanical end-stop detection.

IC Role / Device Role / Timing Role: Motor bridge controller with integrated diagnostics; monitors VS undervoltage to prevent partial actuation during battery sag.

Use Value: Thermal sensor interface reads external MOSFET die temperature, triggering graceful shutdown before reaching 175 °C junction limit.

Park Brake Actuation

Valve Tronic Engine Control

Use Scenario: Fail-safe engagement and release of electronic parking brake via high-torque DC motor with torque feedback.

IC Role / Device Role / Timing Role: Safety-critical driver with watchdog timer and SPI-readback diagnostics; detects open-load and short-circuit faults in real time.

Use Value: 100% duty cycle capability at 6 V ensures full braking force even during cold-cranking battery conditions (ISO 16750-2).

Use Scenario: Variable valve lift control using fast-response DC motor driving cam phaser mechanism in gasoline engines.

IC Role / Device Role / Timing Role: High-frequency PWM driver (up to 30 kHz) with precise current regulation to minimize position jitter and acoustic noise.

Use Value: Differential current sense amplifier with 80× gain enables accurate <1 A motor current resolution for fine valve angle control.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BD37102EFV	Single H-bridge (2-channel), no SPI interface, fixed 12 V gate drive only.	Lacks programmable diagnostics and multi-motor coordination; suitable only for non-networked, low-complexity actuators.	Select when cost sensitivity outweighs need for diagnostics, thermal monitoring, or multi-bridge synchronization.
TLE9201SG	Single half-bridge driver with embedded current sense; no charge pump - limited to >8 V VS for high-side drive.	Requires external level-shifting for 6 V operation; lacks dual-stage pump enabling true 100% duty cycle at low battery.	Prefer for simpler, lower-power loads where 6 V cold-crank operation is not required and SPI diagnostics are optional.

Compared with BD37102EFV and TLE9201SG, the L99H01QF uniquely supports full 6–28 V operation with 100% duty cycle, integrated SPI diagnostics, and dual external thermal sensor inputs - making it the only choice for ASIL-B compliant seat and park brake systems requiring coordinated multi-bridge control and predictive thermal management.

Availability

L99H01QF is available at Aetrix Electronics and suitable for seat positioning, park brake actuation, and valve tronic engine control requiring stable component supply across automotive production lifecycles.

Supply support for L99H01QF 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 ISO/TS 16949 certified manufacturing.

The L99H01 belongs to ST's Automotive Power Switches & Drivers product line, engineered specifically for ASIL-B compliant electromechanical actuation in chassis, body, and powertrain systems - emphasizing functional safety, thermal robustness, and diagnostic completeness.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The L99H01QF has a thermal shutdown threshold of 175 °C, but its recommended maximum continuous junction temperature is 150 °C per Section 6.3 (Thermal Data) of DocID15567 Rev 6. Operation above this limit risks accelerated parametric drift and reduced long-term reliability, especially under sustained 28 V VS and high ambient conditions.

Does the L99H01QF support 3.3 V microcontroller SPI communication?

Yes - the L99H01QF's SPI interface (CSN, CLK, DI, DO) operates with CMOS logic levels compatible with both 3.3 V and 5 V microcontrollers. The DO output is VCC-compatible (3.3 V/5 V), and all inputs meet VIH ≥ 0.7×VCC and VIL ≤ 0.3×VCC thresholds as specified in Table 12 and Table 25.

How is reverse battery protection implemented with the L99H01QF?

The L99H01QF provides a dedicated control signal (pin RBP_CTRL, not present in LQFP32 variant) in PowerSSO-36 packages to drive an external P-channel MOSFET for reverse polarity protection. The LQFP32 version (L99H01QF) does not include this pin; reverse protection must be implemented externally using discrete components or a companion IC like the L9777.

Can the current sense amplifier measure both high-side and low-side shunt voltages simultaneously?

No - the L99H01QF's current sense amplifier is single-ended with multiplexed inputs (CSI1± and CSI2±), allowing sequential measurement of two shunt locations via SPI register configuration (ApplReg3, bits [3:2]). Simultaneous dual-channel sensing is not supported; measurement alternates between channels at user-defined intervals.

L99H01QF Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 32-LQFP

Packaging:: Tray

Product Status:: Active

Motor Type - Stepper:: -

Motor Type - AC, DC:: Brushed DC

Function:: Controller - Commutation, Direction Management

Output Configuration:: Pre-Driver - Half Bridge (2)

Interface:: SPI

Technology:: CMOS

Step Resolution:: -

Applications:: -

Current - Output:: -

Voltage - Supply:: 6V ~ 28V

Voltage - Load:: -

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 32-LQFP

L99H01QF FAQ

1.How can I place an order for L99H01QF through Aetrix?

Please submit a Request for Quotation (RFQ) for L99H01QF 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 L99H01QF reliable?

The price and inventory of L99H01QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L99H01QF is usually 5 days.

3.What payment methods are accepted for L99H01QF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L99H01QF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L99H01QF?

L99H01QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L99H01QF 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 L99H01QF?

For technical support, including L99H01QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L99H01QF requirements.

6.How does Aetrix verify that L99H01QF is sourced from the original manufacturer or authorized distributors?

All L99H01QF 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 L99H01QF meets industry standards.

7.What is the process for return or replacement of L99H01QF?

All L99H01QF units undergo pre-shipment inspection (PSI). If there is an issue with L99H01QF, 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 L99H01QF part is unused and in its original packaging.

Return procedure for L99H01QF:

1.Submit a request within 90 days.

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

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