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Bosch Semiconductors for Automotive

CR665

Alternator regulator for 14V systems with LIN interface

Application & Technical Summary

CF190

CR665 regulates the output voltage of a 14 V alternator to a constant value.

The regulator continuously senses the alternator’s output voltage, rpm, temperature, excitation current. It adjusts the excitation current to keep the output voltage on a constant level. Via LIN commands, the output voltage can be set to any desired value within the given range.

Product benefits

  • Fully integrated alternator regulator
  • LIN single wire interface
  • Load response function
  • TO220-5 package or bare die
  • Compliant to VDA LIN alternator regulator specification
  • Various customer programming options at end of line

10.6 – 16.0 V set voltage

programmable via LIN interface

Technical Features

Type
Voltage regulator for 14V alternators
Package
TO220-5
Robustness of operation


Wake-up from V terminal if communication is missing
Functions to protect alternator and battery

  • Default operation if COM pin is disconnected or shorted
    to B+ or GND
  • Power stage shutdown at extreme temperature
  • Short circuit protection / recovery on DF powerstage
    and on COM

Features

  • High-side DMOS regulated dynamo field (DF) by fixed
    frequency PWM
  • Integrated active freewheeling MOSFET on DF
  • Integrated freewheeling diode on DF
  • DF duty cycle range up to 100 %
  • LR slow loads
  • LR Boost and fast loads
  • Active handling of over-voltage
  • Accepts jump start with 28 V

Communication features

  • LIN2.1 physical interface
  • LIN2.1 and LIN1.3 compatible data link layer

Operating voltage
6.5 – 18 V
Extended operating voltage
4 – 37 V
Set voltage or B+
10.6 – 16 V
Setting
LIN
Regulation
Digital
Freewheeling
Active
Load response
Yes
High temperature shut-off
Yes
ESD handling
all pins: ±8 kV (HBM, 1.5 kOhm, 100 pF to GND)
Field protection
Yes
Tj min [°C]
-40°C
Tj max [°C]
175°C

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Product information

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