L9916-TR - Automotive Alternator Voltage Regulator | STMicroelectronics
MPN: L9916-TR ✓ نشطL9916-TR نظرة عامة
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.
بدائل مباشرة لـ L9916-TR — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع L9916-TR (نفس عامل الشكل والبصمة) — يختلف في Mounting Type, Package.
L9916
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←TLE8888
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
NCV8876
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
L9916-TR الحدود القصوى والخصائص الكهربائية
| نطاق جهد الخرج | 13.5 V to 14.5 V |
| Maximum Field Current | 5 A |
| Supply Voltage Range | 8 V to 28 V |
| تيار السكون | 10 mA |
| نطاق درجة حرارة التشغيل | -40°C to +150°C |
| العلبة | MultiPowerSO-30 |
| نوع التركيب | Surface Mount |
| Load Response Control | Yes |
| Overvoltage Protection | Yes |
| Undervoltage Protection | Yes |
| الإيقاف الحراري | Yes |
| Reverse Battery Protection | Yes |
| حالة RoHS | Compliant |
| AEC-Q100 Qualified | Yes |
| Process Technology | BCD (Bipolar-CMOS-DMOS) |
تكوين أطراف L9916-TR
| دبوس 1 | B+ — Battery positive sense |
| دبوس 2 | FIELD — Field winding driver output |
| دبوس 3 | GND — Ground |
| دبوس 4 | LRC — Load response control input |
| دبوس 5 | IGN — Ignition switch input |
| دبوس 6 | ECU — Engine control unit communication |
| دبوس 7 | BAT — Battery supply |
| دبوس 8 | SENSE — Voltage sense input |
| دبوس 9 | NC — No connect |
| دبوس 10 | NC — No connect |
التطبيقات النموذجية
L9916-TR مناسب لـ 6 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ L9916-TR — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | 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 |
أبرز الفروقات
- AEC-Q100 qualified for automotive reliability (مقابلTLE8888)
- Integrated load response control for idle stability (مقابلNCV8876)
- Wide supply voltage range of 8V to 28V (مقابلTLE8888)
ملاحظات التصميم
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.
معلومات الامتثال
RoHS compliant and AEC-Q100 qualified per STMicroelectronics product page. Halogen-free status not specified in available data.
