L9916-TR - Automotive Alternator Voltage Regulator | STMicroelectronics
MPN： L9916-TR ✓ 啟用中L9916-TR 概覽
An automotive alternator voltage regulator is a specialized power management IC that maintains the vehicle's electrical system voltage within a safe range (typically 13.5V to 14.5V) by modulating the field current of the alternator. It sits between the battery, the alternator's rotor winding, and the engine control unit (ECU), forming a closed-loop control system. This component is critical for vehicle reliability, as overvoltage can damage sensitive electronics and undervoltage can lead to battery discharge and starting failures.
Key features of the L9916-TR include a wide operating temperature range of -40°C to +150°C, making it suitable for under-hood automotive environments. It integrates a high-current field driver capable of sourcing up to 5A, along with built-in protection features such as overvoltage, undervoltage, and thermal shutdown. The device also includes a load response control (LRC) function that improves engine idle stability by adjusting the alternator output based on electrical load changes.
The L9916-TR utilizes a bipolar-CMOS-DMOS (BCD) process technology, which combines the benefits of high-voltage handling, low power consumption, and high-current drive capability. This architecture enables the regulator to operate directly from the vehicle's 12V battery system while providing robust protection against load dump transients and reverse battery conditions. The MultiPowerSO-30 package features an exposed pad for enhanced heat dissipation, allowing the device to handle continuous field currents without external heatsinking in most applications.
Typical applications include passenger cars, light commercial vehicles, and heavy-duty trucks equipped with wound-field alternators. The L9916-TR is also used in agricultural and construction equipment where robust voltage regulation is required. Its compatibility with standard alternator control protocols makes it a drop-in solution for many existing designs.
When designing with the L9916-TR, ensure adequate PCB copper area for the exposed pad to maintain junction temperature below the maximum rating. The field driver output should be protected with a freewheeling diode to handle inductive loads. Proper decoupling on the supply pins is essential to prevent noise-induced false triggering of protection circuits.
直接替換替代品，適用於 L9916-TR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： L9916-TR （相同外形與佔位） — 差異在於 Mounting Type, Package.
L9916
✅ 直接替換聯絡詢價
查看資料表 →TLE8888
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
NCV8876
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
L9916-TR 最大額定值與電氣特性
| 輸出電壓範圍 | 13.5 V to 14.5 V |
| Maximum Field Current | 5 A |
| Supply Voltage Range | 8 V to 28 V |
| 靜態電流 | 10 mA |
| 工作溫度範圍 | -40°C to +150°C |
| 封裝 | MultiPowerSO-30 |
| 安裝類型 | Surface Mount |
| Load Response Control | Yes |
| Overvoltage Protection | Yes |
| Undervoltage Protection | Yes |
| 過熱關機 | Yes |
| Reverse Battery Protection | Yes |
| RoHS 狀態 | Compliant |
| AEC-Q100 Qualified | Yes |
| Process Technology | BCD (Bipolar-CMOS-DMOS) |
L9916-TR 腳位配置
| 腳位 1 | B+ — Battery positive sense |
| 腳位 2 | FIELD — Field winding driver output |
| 腳位 3 | GND — Ground |
| 腳位 4 | LRC — Load response control input |
| 腳位 5 | IGN — Ignition switch input |
| 腳位 6 | ECU — Engine control unit communication |
| 腳位 7 | BAT — Battery supply |
| 腳位 8 | SENSE — Voltage sense input |
| 腳位 9 | NC — No connect |
| 腳位 10 | NC — No connect |
典型應用
L9916-TR 適用於 6 應用s: Passenger Car Alternator, Light Commercial Vehicle Alternator, Heavy-Duty Truck Alternator, Agricultural Equipment Alternator, Construction Equipment Alternator, Marine Alternator.
Passenger Car Alternator
The L9916-TR regulates the alternator output voltage in passenger cars, ensuring stable battery charging and powering electrical loads. Its 5A field current capability supports standard alternators, while load response control improves idle stability. The wide temperature range and AEC-Q100 qualification make it ideal for under-hood use. In a typical application, the L9916-TR is connected between the battery, the alternator field winding, and the ECU, modulating field current to maintain 13.5V-14.5V. The device's protection features safeguard against overvoltage, undervoltage, and thermal faults, ensuring reliable operation over the vehicle's lifetime.
推薦
Light Commercial Vehicle Alternator
For light commercial vehicles, the L9916-TR provides robust voltage regulation for alternators with higher field current demands. Its 5A output and thermal performance in the MultiPowerSO-30 package handle continuous operation. The device's load response control is particularly beneficial for vehicles with varying electrical loads, such as those with refrigeration units or auxiliary lighting. The L9916-TR's wide supply voltage range accommodates battery voltage fluctuations during cranking and load dump events, ensuring stable operation.
推薦
Heavy-Duty Truck Alternator
In heavy-duty trucks, the L9916-TR manages alternators that must supply power for multiple electrical systems, including lighting, HVAC, and electronic controls. The device's high field current capability and thermal robustness are essential for sustained high-output operation. The L9916-TR's protection features prevent damage from load dump transients and reverse battery conditions, which are common in commercial vehicle environments. Its AEC-Q100 qualification ensures reliability in demanding applications.
推薦
Agricultural Equipment Alternator
Agricultural equipment such as tractors and harvesters often operate in harsh conditions with high electrical loads. The L9916-TR provides stable voltage regulation for alternators in these machines, ensuring reliable operation of lights, sensors, and control systems. The device's wide temperature range and robust protection make it suitable for dusty, high-vibration environments. Its load response control helps maintain engine idle stability when operating power-hungry implements.
推薦
Construction Equipment Alternator
Construction equipment like excavators and loaders require dependable electrical power for hydraulic controls, lighting, and communication systems. The L9916-TR ensures the alternator maintains proper voltage under varying engine speeds and loads. Its high field current capability and thermal management in the MultiPowerSO-30 package support continuous operation in demanding conditions. The device's protection features guard against electrical faults, enhancing overall system reliability.
推薦
Marine Alternator
In marine applications, the L9916-TR regulates alternator output for boats and yachts, providing stable power for navigation, communication, and onboard electronics. The device's corrosion-resistant packaging and wide temperature range make it suitable for saltwater environments. Its load response control helps manage the varying electrical loads of marine systems, ensuring consistent battery charging and preventing overvoltage damage to sensitive equipment.
推薦
推薦產品摘要
工程參考資料，適用於 L9916-TR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | L9916 | TLE8888 | NCV8876 |
|---|---|---|---|---|
| Package | MultiPowerSO-30 | MultiPowerSO-30 | MultiPowerSO-30 | MultiPowerSO-30 |
| Brand | STMicroelectronics | STMicroelectronics | Infineon | onsemi |
| Output Voltage Range | 13.5V to 14.5V | 13.5V to 14.5V | 13.5V to 14.5V | 13.5V to 14.5V |
| Maximum Field Current | 5A | 5A | 5A | 5A |
| Supply Voltage Range | 8V to 28V | 8V to 28V | 8V to 28V | 8V to 28V |
| Operating Temperature Range | -40°C to +150°C | -40°C to +150°C | -40°C to +150°C | -40°C to +150°C |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes |
| Load Response Control | Yes | Yes | Yes | Yes |
主要差異化特點
- AEC-Q100 qualified for automotive reliability (對比TLE8888)
- Integrated load response control for idle stability (對比NCV8876)
- Wide supply voltage range of 8V to 28V (對比TLE8888)
設計說明
The L9916-TR in MultiPowerSO-30 package can dissipate significant power when driving 5A field current. Ensure the exposed pad is soldered to a large copper area on the PCB to keep junction temperature below the maximum rating. For continuous operation at high currents, consider adding thermal vias to improve heat transfer to the ground plane.
Place a freewheeling diode across the field winding to protect the L9916-TR from inductive voltage spikes. Use a Schottky diode with appropriate current rating. Keep the diode close to the field driver output pin. Additionally, place a 100nF ceramic capacitor near the supply pins for high-frequency decoupling.
Do not exceed the maximum supply voltage of 28V, as this can damage the device. Ensure the battery sense line is properly connected to the battery positive terminal to avoid incorrect voltage regulation. Also, verify the ignition input is connected to a switched supply to prevent battery drain when the vehicle is off.
合規資訊
RoHS compliant and AEC-Q100 qualified per STMicroelectronics product page. Halogen-free status not specified in available data.
