L9924LTR Active

Vehicle network conform truck car alternator regulator for 24V Systems with LIN Diagnostics
Operating RangeAutomotive
Operating Temp Min Celsius-40.0
Operating Temp Max Celsius150.0
Operating Voltage Min Volt6.0
Operating Voltage Max Volt40.0
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
ROHS Compliance GradeEcopack2
GradeAutomotive
Package NameTQFP 44 10x10x1.0
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)
  • Diagnostic via LIN
  • LIN 2.1 interface for programming and control
  • Self start function
  • Load response control (LRC)
  • Field monitor (FM) output
  • Thermal shutdown
  • Package TQFP44EP (10 x 10 mm)

The L9924L is a controlled multifunctional alternator regulator intended to be used in cars, commercial and agricultural vehicles, with support for 12 V and 24 V systems. The control can be achieved through different communication protocols: LIN, RCV, PCM, C_term, BSS. 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.

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