L9915-CB STMicroelectronics

L9915 C-terminal alternator voltage regulator (CTAVR) Datasheet - production data Description The device is a monolithic alternator voltage regulator intended for use in automotive application. 0 03 It includes the control section, the field power stage, fault diagnostic circuit which drives a Multiwatt8 warning lamp, and the protection against short circuits. This device regulates in close loop the output of Features an automotive generator by controlling the field Fully monolithic design winding current by means of a pulse-width modulation (PWM) high side driver at fixed High side field driver frequency. Field short circuit protection The set-point voltage reference selected by the Regulated voltage driven by ECU (protocol Engine Control Unit via C-terminal protocol is driven) temperature flat. An internal voltage reference Regulated voltage thermally compensated thermally compensated is present in the device (without protocol) and used when the protocol coming from ECU is Lamp driver (wake up and warning detection) absent or the wire is broken. Self start function A self-bias circuitry is present on L pin in order to turn-on the warning lamp also when the device is Load response control (LRC) not supplied (battery connection broken). Field monitor (FM) output Thermal shutdown Table 1. Device summary Self start High frequency Freq. threshold to Temp range, Order code frequency threshold to exit Package Packing exit/enter LRC C threshold prexcitation option (1) (1) (1) L9915-CB fPSS,1 fPHPrex,1 fPLRC,1 T = -40 to +150 Multiwatt8 Tube j 1. Other values for VBITD, fPHPrex, fMsw and VBisp can be possible. ST reserves the right to decide on a case by case basis. June 2014 DocID026400 Rev 1 1/21 This is information on a product in full production. www.st.comContents L9915 Contents 1 Functional description . 5 1.1 Application schematic . 5 1.2 External component required . 6 2 Pin description . 7 3 Electrical specification . 8 3.1 Absolute maximum ratings . 8 3.2 Thermal data . 8 3.3 Electrical characteristics . 9 3.3.1 Pin B . 9 3.3.2 Pin 11 3.3.3 Excitation fixed function . 13 3.3.4 PinF . 14 3.3.5 PinP . 15 3.3.6 Pin F 16 3.3.7 Load response control function (LRC) 17 3.3.8 Pin 18 4 Package information 19 5 Revision history . 20 2/21 DocID026400 Rev 1