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L9473
CAR ALTERNATOR VOLTAGE REGULATOR
1
FEATURES
FOR AIR AND LIQUID COOLED APPLICATIONS AMBIENT AIR TEMPERATURE (THERMISTOR) COMPENSATED SPECIAL DEFAULT COMPENSATION CURVE WITH TS-TERMINAL OPEN COMPENSATION CURVE WITH APPLICATION SPECIFIC RESISTOR ON TS THERMAL PROTECTION FIELD DRIVER, LAMP DRIVER, RELAY DRIVER, AND DF (FIELD MONITOR) SHORT CIRCUIT PROTECTED LOAD RESPONSE CONTROL SINGLE PHASE AUTOSTART
Figure 1. Package
Multiwatt8
Table 1. Order Codes
Part Number L9473J Package Multiwatt8

Voltage regulator intended for use in automotive charging applications. This All Silicon Voltage Regulator regulates the output of an automotive generator by controlling the field winding current by means of a variable frequency PWM high side driver.

2
DESCRIPTION
The L9484 is a monolithic multifunction generator Figure 2. Block Diagram
NTC
7
4
1 8 2
6
3
May 2005
Rev. 1 1/9
L9473
Table 2. PIN DESCRIPTION
N 1 2 3 4 5 Pin VGO F+ G TS Gnd Field Driver - High Side Drive Output Ground for ASVR (Must be connected for Ground for ASVR) Thermistor Sense Terminal Internally connected to the Tab or Slug in MW-8. Shall not be used for ASVR Ground, nor voltage applied to Pin 5 to cause 50mV Pin 5 to Pin 3. May be unconnected or externally connected to Pin 3. Inverted Field Monitor Output Lamp - Low Side Driver; Relay - High Side Driver Phase Sense Input Description Generator Output - Voltage Sense and Power Supply to ASVR
6 7 8
DF L P
Figure 3. PIN CONNECTION (Top view)
8 7 6 5 4 3 2 1 Tab connected to pin 5
D02AT502
P L DF GND TS G F+ VGO
Table 3. ABSOLUTE MAXIMUM RATINGS
Symbol Output Current Capability Power Dissipation Short Circuit Protected Parameter Value INTERNALLY LIMITED 6 All Terminal, to VGO and Ground Unit A W
Table 4. THERMAL DATA
Symbol Tj Tstg Tsd Rth j-case Junction Temperature Storage Temperature Thermal Shut-Down Thermal Resistance Junction to Case Parameter Value -40 to +150 -50 to +150 175 15 1.5 Unit C C C C/W
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L9473
Table 5. ELECTRICAL CHARACTERISTCS (Tcase = -35C to +150C continuous unless otherwise specified)
Symbol VOS VOS ISB Parameter Operating Supply Voltage Operating Supply Voltage Stand-By Current Test Condition Tcase = +25C to =150C Tcase = -40C to +25C VGO = 12.6V; Tcase = 25C; 10k VGO to TS; F+, G & Tab (Slug) Grounded; L, DF, & P unconnected; Regulator NOT Activated. 10k between VGO and TS NTC thermistor with R25C = 10k; Tj = 90C No battery, IOUT = 2A to 50% Max. Load Voltage @ VGO 6500 grpm, 10% to 95% load 15A load, 2000 to 20,000 grpm IF = 6A, VGO = 14.0V, Tcase = 25C IF = 5A, VGO = 13.5V, Tcase = 125C Current F+ Terminal to Gnd. @ Tcase 25C Current F+ Terminal to Gnd. @ Tcase = +150C Current measured @ generator output IF = 6A, Tcase = 25C VR = 20V During LRC operation IDF 10mA VDF < 25V VDF = 32 - 35V; thru 2.2k 4X 340 400 9.0 6.0 0.5 1.85 1 460 0.8 10 Min. 8 10 Typ. Max. Vov Vov 300 Unit V V A
VSP VSP VNB TC VLR VSR VF-ON VF-ON IF-LIM IF-LIM IG-MIN VD-F ID-R FOSC VDF IDF-LK FTURBO
Regulator Set-Point Regulator Set-Point Generator Output, No Battery Thermal Compensation Load Regulation Speed Regulation Output Saturation Voltage Output Saturation Voltage Field Limit Current1 Field Limit Current1 Min. Generator Current Load Field Discharge Diode Diode Reverse Current Oscillation Frequency DF Saturation Voltage DF Output Leakage Current Internal Clock Frequency
Curve shown in Fig. 2 Curves shown in Fig. 3 (with MURATA NTC NTH4G39A1) VSP - 2 VSP + 2 V
Curves shown in Figs.4, 5 300 100 750 850 mV mV mV mV A A A V mA Hz V A Hz
Notes: 1. The Field Drive capability shall not decrease as a function of temperature between 25C and 150C, at a rate faster than -0.024A/ C (for example, Field Drive shall be capable of 7.2A at 100C).
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L9473
Figure 4. Set-Point Voltage vs. Mounting Tab Temperature (10k between VGO & TS)
15.4
15.3 15.17 15.08
15.2
15 15.01 Volts 14.8 14.86 14.77 14.84 14.69 14.59 14.6 14.41 14.4 14.3 14.2 -40 -20 0 20 40 60 80 100 120
Junction Temp
Figure 5. Set-Point Voltage vs. Thermistor Temperature, Tj = 90C (Not guaranteed by testing, depending on NTC characteristics)
15.2
15.04
15
14.88
14.8 14.6
14.73 14.49
Volts
14.4 14.2 14 13.8 13.6
13.91
13.53
13.4 -40 -20 0 20 40 60 80 100 120
NTC Temp
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L9473
Figure 6. Set-Point Voltages vs. Mounting Tab Temperature (TS-Open)
15.0 14.8 14.6 14.73 14.63 14.43 14.12 14.00 13.8 13.78 13.6 13.4 13.2 13.0 -40 -20 0 20 40 60 80 100 120 140 160
Set Voltage
14.4 14.2 14.0
Temp
Table 6. DIAGNOSTIC (Tcase = -35C to +150C unless otherwise specified)
Symbol VOV VUV VL-SAT Parameter Over-Voltage Under-Voltage Lamp ON Saturation Voltage FP > FP-LRC , 10kohm between S_term and VGO IL = 0.5A (sinked by ASVR) IL < 0.5A, VGO = Open; Tcase = 35C to 85C IL = 750mA (Sourced by ASVR)
3
Conditions
Min. VSP + 1 10.95 >VL-ACT
Typ. VSP + 1.3
Max. VSP + 2 11.8
Units V V V V V s
1.33 3.8
1.45 5 1.85
VL-SAT-BO Lamp ON Voltage 2 VL-RLY TDELAY Lamp OFF (Relay Drive) Saturation Voltage (vs. B+) Fault Indication Delay Time
Tcase < 125C 0.9 1.1 1.3
Delay before Lamp ON
2. This condition can happen when the connection between the battery and VGO or the output terminal of the generator is broken. The 1.1 second delay is not required, and current is sinked by ASVR. 3. When no fault is detected the Lamp terminal is pulled up by ASVR.
Table 7. FAULT INDICATION TABLE
Conditions Initial KEY-ON Bulb and Wiring Check (Lamp ON for 1 sec 15% after initial KEY-ON) VGO > VOV VP < VP-F AND VGO < VSP FP < FP-TR @ VP-TR No Connection Between Battery and VGO At Start: Lamp ON until FP>FP-IR AND VP>VP-F. i.e. until VP reaches 8V. TDelay? No Yes Yes Yes No No
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L9473
Table 8. REGULATION FEATURES
Symbol VL-PD IL-PD VP-IR IP FP-IR FP-TR IRD Parameter L Terminal Regulator Activate Threshold L Terminal Pull Down Current Initiate Regulation Phase Voltage Threshold Phase Terminal Current Sink Initiate Regulation Phase Frequency Terminate Regulation Phase Frequency Initiate Regulation Delay Regulator Activated, VP-IR AND FP-IR Conditions Met First Time. Regulator Activated AND (Regulation Terminated OR Regulation NOT Initiated) Field Drive Duty Cycle Increase LRC Enabled if FP < FP-LRC LRC enabled until VSP reached regardless other conditions Conditions VGO=12.6V VL = VL-ACT VGO=12.6V Regulator Activated VP > 1.5V and < 12.6V VGO = 12.6V Min. 0.8 0.09 1.1 0.25 123 59 2.5 145 72 3 1.3 Typ. 1 Max. 1.15 0.78 1.5 3.5 167 86 3.5 Unit V mA V mA Hz Hz s
FSDC
Field Strobe Duty Cycle
16
18.75
22
%
LRC FP-LRC SS
Load Response Control Rate LRC Transition Frequency Soft-Start
8.5 255 34
10 300 40
11.5 345 46
%/s Hz %/s
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L9473
Figure 7. Multiwatt 8 Mechanical Data & Package Dimensions
mm DIM. MIN. A B C E F G G1 H1 H2 L L2 L3 L4 L7 S S1 U Z Dia1 20.35 17.05 17.25 10.3 2.65 1.9 1.9 0.40 0.70 3.65 17.20 17.5 10.7 0.49 0.78 2.40 17.64 19.6 20.2 20.65 17.35 17.75 10.9 2.9 2.6 2.6 0.55 0.85 3.85 0.80 0.67 0.679 0.406 0.104 0.075 0.075 0.015 0.028 0.144 0.68 0.689 0.421 2.54 17.78 TYP. MAX. 5 2.65 1.6 0.55 0.85 2.68 17.92 0.019 0.030 0.094 0.69 0.772 0.795 0.81 0.68 0.699 0.429 0.114 0.102 0.102 0.022 0.034 0.152 0.10 0.70 MIN. TYP. MAX. 0.197 0.104 0.063 0.022 0.033 0.105 0.71 inch
OUTLINE AND MECHANICAL DATA
Multiwatt8 (Pin 5 GND)
0043696 F
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L9473
3
REVISION HISTORY
Table 9. Revision History
Date May 1994 Revision 1 First Issue Description of Changes
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L9473
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com
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