Overview
The L9916 is a multifunction alternator voltage regulator designed by STMicroelectronics for automotive applications. It is suitable for use in both 12 V and 24 V on-board networks. This smart regulator features a high side power output for field driving and includes an internal freewheeling diode. The L9916 is AEC-Q100 qualified, ensuring it meets the stringent standards required for automotive electronics. It provides continuous feedback to the Engine Control Unit (ECU) through the field monitor output and includes various protection mechanisms such as thermal shutdown and field short circuit protection.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range | 6 | - | 36 | V |
| Transient Supply Voltage (load dump) | - | - | 58 | V |
| Junction Temperature Range | -40 | - | 175 | °C |
| Storage and Case Temperature Range | -40 | - | 150 | °C |
| Total Power Dissipation (@ Tcase ≤ 150°C, Ifield ≤ 5 A) | - | - | 4 | W |
| Thermal Shutdown Threshold | 160 | 175 | 190 | °C |
| Standby Current Consumption (12 V, VB = 12.5 V) | - | - | 120 | μA |
Key Features
- Fully monolithic design
- High side field driver with internal freewheeling diode
- Self-start function
- Regulated voltage thermally compensated
- Configurable parameters through OTP cells
- Lamp driver (wake up and warning detection)
- Load response control (LRC)
- Thermal shutdown and field short circuit protection
- Protected high side relay driver
- Slew rate control and filtering for electromagnetic compatibility
Applications
The L9916 is primarily designed for automotive applications, specifically for regulating alternator voltage in 12 V and 24 V on-board networks. It is suitable for use in multi-phase-current alternators and is intended to maintain the battery voltage at its nominal value regardless of vehicle demand.
Q & A
- What is the L9916 used for? The L9916 is used as an alternator voltage regulator in automotive applications for both 12 V and 24 V systems.
- What are the key features of the L9916? Key features include a high side field driver, self-start function, thermally compensated regulated voltage, configurable parameters via OTP cells, and various protection mechanisms.
- Is the L9916 AEC-Q100 qualified? Yes, the L9916 is AEC-Q100 qualified, ensuring it meets automotive electronics standards.
- What is the operating voltage range of the L9916? The operating voltage range is from 6 V to 36 V.
- What protection mechanisms does the L9916 include? The L9916 includes thermal shutdown, field short circuit protection, and a protected high side relay driver.
- How does the L9916 provide feedback to the ECU? The L9916 provides continuous feedback to the ECU through the field monitor output.
- What is the purpose of the OTP cells in the L9916? The OTP cells allow for the configuration of various parameters, making the device suitable for a wide range of charging applications.
- What is the thermal shutdown threshold of the L9916? The thermal shutdown threshold is between 160°C and 190°C.
- What is the standby current consumption of the L9916? The standby current consumption is up to 120 μA at 12 V and VB = 12.5 V.
- What type of alternators is the L9916 suitable for? The L9916 is suitable for multi-phase-current alternators.
