STMicroelectronics L9474
The L9474 is a monolithic multifunction generator Voltage regulator intended for use in automotive applications. This device regulates the output of an automotive generator by controlling the field winding current by means of a variable frequency PWM high side driver.| Part No. | L9474 |
|---|---|
| Datasheet | L9474 Download |
| Manufacturer |  STMicroelectronics |
| Description | All silicon voltage regulator |
| Buy | Stock & Price |
FEATURES
High side field driver Thermal protection Field driver short circuit protection RVC interface Overvoltage protection Complex diagnostics Load Response Control Figure 1. Package Multiwatt8 2DESCRIPTION
Table 1. Order Codes Part Number L9474 Package Multiwatt8 Figure 2. Schematic Diagram The setpoint voltage reference is selected by the ENGINE CONTROL UNIT via RVC protocol. TO ECM L VGO STARTER FM F+ TO BCM TO ECM ASVR P STATOR BATTERY FIELD (ROTOR) G FILTER C 82nF RECTIFIER BRIDGE D02AT508 LOADS March 2005 Rev. 1 1/8 L9474 Table 2. PinDESCRIPTION
N° 1 2 3 4 5 6 7 8 Pin P L FM RESERVED GND FILTER F+ VGO Regulation loop filter Field high side driver output Generator output sense and voltage supply to L9474 Phase sense input Warning terminal output and ECM PWM input Field monitor output Reserved Function Table 3.ABSOLUTE MAXIMUM RATINGS
Symbol VS IO Ptot VREV Parameter Transient Supply Voltage (load dump) Output Current Capability Power Dissipation (@Tj = 150°C, IField = 6A) Reverse Voltage (see fig.1) Value 40 Internally limited 6 -2.5 to -6 Unit V A W V Figure 3.
