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  • The L9912 is a controlled multifunctional alternator regulator intended to be used in cars, commercial and agricultural vehicles. It supports 12 V system. The control can be achieved through different communication protocols: RCV, PCM, C_term. It is a System-In-Package solution with smart power alternator regulator IC coupled with a 8-bit microcontroller (non-monolithic approach). It includes the control section, fault diagnostic circuit which drives a warning lamp, and the protection against short circuits.

    This device regulates in closed loop the output of an automotive generator by controlling the field winding current by means of a Pulse-Width Modulation (PWM) of an external high side or low side driver at fixed frequency.

    Key Features

    • AEC-Q100 qualified
    • System in package smart power alternator regulator and 8-bit microcontroller (non-monolithic approach)
    • Protected high/low side field pre-driver for external MOS
    • Field short circuit protection
    • Regulated voltage driven by ECU (programmable 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
    • Package TQFP44EP (10 x 10 mm)

Sample & Buy

Part Number
Package
Packing Type
Temperature (°C) Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
More info
Order from Distributors
Order from ST
min
max
L9912TR TQFP 44 10x10x1.0 Tape And Reel -40 150
Active
- - EAR99
MORE INFO

Country of Origin:

-

No availability of distributors reported, please contact our sales office

L9912TR

Package

TQFP 44 10x10x1.0

Packing Type

Tape And Reel

Unit Price (US$)

*

Operating Temperature (°C)

(min)

-40

(max)

150

Marketing Status

Active

Unit Price (US$)

-

Quantity

-

ECCN (US)

EAR99

Country of Origin

-

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DB2406
      12 V Vehicle network conform car alternator regulator IC
      4.0
      231.19 KB
      PDF
      DS11789
      Automotive vehicle conform car alternator regulator IC
      2.0
      1.13 MB
      PDF
      DB2406

      12 V Vehicle network conform car alternator regulator IC

      DS11789

      Automotive vehicle conform car alternator regulator IC

    • Description Version Size Action
      AN4810
      L9912, L9912L, L9924 and L9924L lamp handling
      1.0
      895.93 KB
      PDF
      AN4810

      L9912, L9912L, L9924 and L9924L lamp handling

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L9912TR
Active
TQFP 44 10x10x1.0 Automotive Ecopack2

L9912TR

Package:

TQFP 44 10x10x1.0

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TQFP 44 10x10x1.0

Grade

Automotive

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.