STMicroelectronics L9915B
L9915B is a monolithic alternator voltage regulator intended for use in automotive application. It includes the control section, the field power stage, fault diagnostic circuit which drives a warning lamp, and the protection against short circuits. This device regulates in close loop the output of an automotive generator by controlling the field winding current by means of a pulse-width modulation (PWM) high side driver at fixed frequency.| Part No. | L9915B |
|---|---|
| Datasheet | L9915B Download |
| Manufacturer |  STMicroelectronics |
| Description | C-terminal alternator voltage regulator |
| Buy | Stock & Price |
FEATURES
● Fully monolithic design● High side field driver
● Field short circuit protection
● Regulated voltage driven by ECU (protocol driven)
● Regulated voltage thermally compensated (without protocol)
● Lamp driver (wake up and warning detection)
● Self start function
● Load response control (LRC)
● Field monitor (FM) output
● Thermal shutdown
DESCRIPTION
The set-point voltage reference selected by the Engine Control Unit via C-terminal protocol is temperature flat. An internal voltage reference thermally compensated is present in the device and used when the protocol coming from ECU is absent or the wire is broken. A self-bias circuitry is present on L pin in order to turn-on the warning lamp also when the device is not supplied (battery connection broken). Order code L9915B Internal thermal drift option VBITD Table 1. Device summary High frequency threshold to exit prexcitation option Temp range, C fPHPrex Tj = -40 to +150 Package Multiwatt8 Packing Tube February 2015 This is information on a product in full production.
