Infineon has introduced a new alternator control IC specifically for closed-loop voltage control applications. The TLE8880 is a monolithic full-featured regulator for 12 V automotive multi-phase alternators with a rotating field winding.
This regulator is able to communicate with an engine or energy management ECU through a standard LIN interface. The battery voltage is regulated at a precise value between 10.6 V and 16 V. By using freely adjustable parameters, the regulator is able to operate even without a communication interface. The TLE8880 is compliant with the VDA LIN Alternator Regulator specification. The output driver stage consists of a high-side DMOS with a typical RDS(on) of 60 mΩ for up to 12 A excitation current to the field winding.
| TLE8880 block diagram |
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The chip has 8 kV ESD protection for alternator lines. It contains an EEPROM with adjustable parameters that can be programmed in order to customize the alternator for individual OEM or application needs.
Features
- LIN 1.3 (data link) interface, compatible with LIN 2.1 physical layer
- EEPROM for customer-specific adjustments
- Full digital and fast PI regulation
- Standby current of 60 µA
- Reverse battery protection to -2.5 V
- 8 KV ESD protection for alternator lines
- Duty cycle driven by excitation current in range from 0 to 100%
- Temperature range -40 °C to +175 °C
- Digital temperature compensation
- Available in 2 types of packages : TN for soldering and TN2 for welding with nickel-free leads
- High-side DMOS with very low RDS(on) of 60 mΩ typical
Applications
- 12 V truck alternators with LIN interface
- 12 V alternators for cars with LIN interface
- 12 V generators in industrial applications
- Aftermarket alternators and brushholders
