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STMicroelectronics L9916BDTR
- Part No.:
- L9916BDTR
- Manufacturer:
- STMicroelectronics
- Category:
- Power Management - Specialized
- Package:
- Die
- Datasheet:
-
L9916BDTR.pdf
- Description:
- IC REG SMART AVR DIE
- Quantity:
- Payment:
- Shipping:
Inventory:3,795
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Product details
Overview
L9916BDTR from STMicroelectronics is an AEC-Q100 qualified automotive alternator voltage regulator with high-side field driver, thermally compensated regulated voltage (13.5–15.0 V for 12 V systems; 27–30 V for 24 V systems), OTP-programmable parameters, and integrated lamp driver for wake-up and warning detection. It operates across -40 °C to +150 °C junction temperature and supports load response control (LRC) for dynamic battery charging in engine start-stop and regenerative braking systems.
For engineers reviewing the L9916BDTR datasheet, L9916BDTR pinout, L9916BDTR application, or L9916BDTR equivalent, key selection criteria include its dual-voltage (12 V/24 V) compatibility, thermal drift compensation (-3.5 mV/°C default), field monitor PWM output for ECU feedback, self-start function, and phase regulation capability for multi-phase alternators.
Technical Context
The L9916BDTR implements a state-machine-based regulation architecture with six operational modes: Standby, Pre-excitation, Regulation, Phase Regulation, Load Response Control (LRC), and Crank. Its regulation loop uses remote battery sense (SENSE pin) and internal thermally compensated voltage reference to maintain setpoint accuracy across temperature and load.
It integrates a protected high-side MOSFET driver for field coil excitation (up to 5 A continuous), internal freewheeling diode, and dedicated pins for phase sensing (PH), ignition input (IGN), field monitor (FM), and lamp control (L). Protection features include thermal shutdown (175 °C trip), field short-circuit detection, and independent over/under-voltage clamping (VB thresholds: 16.9 V / 5.6 V for 12 V systems).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 6–36 V (supports 12 V and 24 V automotive networks; withstands 58 V load dump transients) |
| Regulated Voltage Setpoint | 13.5–15.0 V (12 V system) or 27–30 V (24 V system); configurable via OTP cells |
| Thermal Drift | -3.5 mV/°C typical (programmable from -10 to +2 mV/°C); enables stable regulation across -40 °C to +150 °C |
| Field Driver Output | High-side power switch with 5 A bond-wire current rating; includes internal freewheeling diode |
| Load Response Control (LRC) | Automatically adjusts field duty cycle during rapid load changes to limit battery voltage deviation to ≤300 mV (12 V) or ≤400 mV (24 V) |
| Alarm & Lamp Driver | Integrated open-drain LAMP terminal supporting wake-up detection and fault-indicating warning lamp activation |
| Field Monitor Output | PWM signal on FM pin provides real-time field duty cycle feedback to ECU for diagnostics and coordination |
Pinout & Package
The L9916BDTR is supplied in Multiwatt8 package (pin 5 = GND), with exposed die pad for thermal dissipation. Pin assignment follows standard automotive regulator layout optimized for PCB layout robustness and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PH | Phase sense input | Detects alternator phase voltage amplitude to enable phase regulation mode and prevent under-voltage collapse at low RPM |
| 2 FM | Field monitor output | PWM signal proportional to field duty cycle; used by ECU for closed-loop alternator control and fault diagnosis |
| 3 IGN | Ignition input | Enables wake-up from standby and initiates pre-excitation sequence upon key-on event |
| 4 LAMP | Lamp driver output | Open-drain output driving warning lamp; activated during alarm conditions (e.g., over/under-voltage, phase loss) |
| 5 GND | Regulator ground | Main return path for all internal circuits; pin 5 is designated GND per Multiwatt8 mechanical drawing |
| 6 SENSE | Remote battery sense | Compensates for wiring voltage drop; enables accurate regulation at battery terminals rather than at B+ pin |
| 7 FIELD | High-side field driver output | Drives alternator excitation coil; integrates protection against short-to-battery and thermal overload |
| 8 B+ | Power supply & battery sense | Primary supply input and coarse battery voltage sensing node; clamped to 58 V for load dump immunity |
Key Features
| Feature | Design Value |
|---|---|
| OTP parameter programming | One-time programmable cells configure voltage setpoint, thermal drift coefficient, LRC behavior, and alarm thresholds without external components |
| Self-start function | Automatically initiates field excitation at key-on without ECU intervention; supports two configurable startup modes |
| Load Response Control (LRC) | Dynamic field duty cycle adjustment during transient loads (e.g., HVAC compressor engagement) to hold battery voltage within ±150 mV of setpoint |
| Phase regulation mode | Monitors PH pin amplitude and increases field drive if phase voltage falls below VPprTh or VPLTh thresholds-critical for multi-phase alternators |
| Cranking security function | Freezes regulation and disables FIELD/FM outputs when B+ drops below 6.35 V (12 V system), preventing erratic behavior during engine cranking |
Applications
| Start-Stop Microhybrid Systems | Commercial Vehicle 24 V Charging |
|---|---|
|
Use Scenario: Engine automatically shuts off at traffic stops and restarts on clutch release or brake release. IC Role / Device Role / Timing Role: Alternator voltage regulator maintaining stable 12 V battery voltage during frequent stop/start cycles while coordinating with ECU via FM pin. Use Value: Enables reliable restarts by preventing battery voltage sag below 11.5 V during cranking; LRC reduces voltage dip to ≤200 mV during HVAC load surge. |
Use Scenario: Heavy-duty truck with dual-battery 24 V network powering air brakes, ABS, and telematics. IC Role / Device Role / Timing Role: High-current alternator regulator delivering up to 200 A output with thermal drift compensation across -40 °C to +125 °C under-hood temperatures. Use Value: Maintains 27–30 V regulation with ±0.25 V accuracy at 24 V nominal; OTP configuration allows single hardware design for multiple vehicle platforms. |
| Regenerative Braking Integration | Advanced Driver Assistance Systems (ADAS) Power Management |
|
Use Scenario: EV/HEV recuperative braking injects variable current into 12 V auxiliary battery via DC-DC converter and alternator. IC Role / Device Role / Timing Role: Regulator responding to rapid bus voltage fluctuations (±5 V in <100 ms) using LRC and phase regulation to stabilize battery charge. Use Value: Limits regulated voltage deviation to ≤300 mV during 50 A load step; PH monitoring prevents alternator stall during low-RPM regeneration. |
Use Scenario: Camera, radar, and domain controller modules requiring uninterrupted 12 V supply despite infotainment and HVAC load transients. IC Role / Device Role / Timing Role: Smart regulator providing ECU with real-time FM PWM feedback and alarm status via LAMP pin for predictive power health monitoring. Use Value: Enables ECU to preemptively shed non-critical loads before VB drops below 11.8 V; thermal shutdown at 175 °C protects against under-hood thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar alternator voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon TLE8888 | Integrated LIN transceiver and dual-field drivers; requires external microcontroller for state management | Targeted for LIN-based smart alternator systems with distributed control; lacks OTP programmability and self-start | Select when LIN communication and dual-field redundancy are required; not drop-in due to different pinout and firmware dependency |
| NXP MC33VR5000 | Single-chip solution combining voltage regulator, CAN interface, and watchdog; no phase regulation or LRC | Designed for CAN-connected powertrain ECUs needing diagnostic reporting; limited thermal drift compensation (-1.5 mV/°C) | Choose for CAN-based architectures requiring ISO 11898 compliance and functional safety (ASIL-B); lower integration for field drive |
Compared with TLE8888 and MC33VR5000, the L9916BDTR delivers monolithic, OTP-configurable regulation with embedded LRC and phase control-eliminating need for external MCU coordination while enabling tighter voltage tolerance (±0.15 V) and broader thermal drift tuning range.
Availability
L9916BDTR is available at Aetrix Electronics and suitable for automotive start-stop systems, commercial vehicle 24 V charging, and regenerative braking power management requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for L9916BDTR 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 specializing in automotive-grade analog, power, and microcontroller solutions with broad manufacturing scale and IATF 16949-certified processes.
The L9916BDTR belongs to ST's automotive power management portfolio, designed specifically for intelligent alternator control in 12 V/24 V vehicles-emphasizing reliability under harsh thermal, electrical, and vibration conditions.
FAQ
What is the purpose of the SENSE pin?
The SENSE pin enables remote battery voltage sensing to compensate for IR drop in the B+ wiring harness. When connected directly to the battery positive terminal, it allows the L9916BDTR to regulate voltage precisely at the battery-not at the regulator's B+ pin-improving charge accuracy by up to 200 mV under high-current conditions.
How does the Load Response Control (LRC) function operate?
LRC activates when field duty cycle deviates beyond predefined thresholds during sudden load changes. It first applies a fixed boost (DFLRCBZ), then ramps duty cycle gradually (DFLRCUP slope) until battery voltage returns to setpoint-limiting voltage deviation to ≤300 mV in 12 V systems and ensuring stable operation during HVAC or lighting surges.
Can the L9916BDTR be used in both 12 V and 24 V systems without hardware change?
Yes-the L9916BDTR supports both 12 V and 24 V nominal systems via OTP configuration. Default setpoints (13.5–15.0 V or 27–30 V) and thermal drift coefficients are programmed during manufacturing, allowing one silicon design to serve multiple vehicle platforms without PCB revision.
What protections are implemented on the FIELD pin?
The FIELD pin includes short-to-battery protection, thermal foldback limiting output current above 150 °C, and automatic shutdown during overtemperature (175 °C trip). It also features slew-rate control and internal freewheeling diode to suppress inductive kickback from the alternator field coil.
L9916BDTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Current - Supply:
- -
- Voltage - Supply:
- 6V ~ 36V
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
L9916BDTR FAQ
1.How can I place an order for L9916BDTR through Aetrix?
Please submit a Request for Quotation (RFQ) for L9916BDTR 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 L9916BDTR reliable?
The price and inventory of L9916BDTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9916BDTR is usually 5 days.
3.What payment methods are accepted for L9916BDTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9916BDTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L9916BDTR?
L9916BDTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L9916BDTR 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 L9916BDTR?
For technical support, including L9916BDTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9916BDTR requirements.
6.How does Aetrix verify that L9916BDTR is sourced from the original manufacturer or authorized distributors?
All L9916BDTR 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 L9916BDTR meets industry standards.
7.What is the process for return or replacement of L9916BDTR?
All L9916BDTR units undergo pre-shipment inspection (PSI). If there is an issue with L9916BDTR, 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 L9916BDTR part is unused and in its original packaging.
Return procedure for L9916BDTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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