L9473J

L9473 Car alternator voltage regulator Features ■ For air and liquid cooled applications ■ Ambient air temperature (thermistor) compensated ■ Special default compensation curve with TSterminal 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 Multiwatt8 Description The L9473 is a monolithic multifunction generator Voltage regulator intended for use in automotive charging applications. Table 1. 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. Device summary Order code Package Packing L9473J Multiwatt8 Tube September 2013 Rev 3 1/10 www.st.com 10 Contents L9473 Contents 1 2 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3 Electrical characteristcs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2/10 L9473 Block diagram and pin description 1 Block diagram and pin description 1.1 Block diagram Figure 1. Block diagram NTC 7 4 1 8 2 6 1.2 3 Pin description Table 2. Pin description N° Pin 1 VGO 2 F+ Field Driver - High Side Drive Output 3 G Ground for ASVR (Must be connected for Ground for ASVR) 4 TS Thermistor Sense Terminal 5 GND 6 DF 7 L Lamp - Low Side Driver; Relay - High Side Driver 8 P Phase Sense Input Figure 2. Description Generator Output – Voltage Sense and Power Supply to ASVR 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 Pin connection (top view) Tab connected to pin 5 8 P 7 L 6 DF 5 GND 4 TS 3 G 2 F+ 1 VGO D02AT502 3/10 Electrical specifications L9473 2 Electrical specifications 2.1 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol Parameter IOC Output current capability Ptot Power dissipation A 6 W Thermal data Symbol Parameter Value Unit Tj Junction temperature -40 to +150 C Tstg Storage temperature -50 to +150 C Tsd Thermal shut-down 175  15 C 1.5 °C/W Rth j-case Thermal resistance junction to case 2.3 Electrical characteristcs Table 5. Electrical characteristcs (Tcase = -35°C to +150°C continuous unless otherwise specified) VOS Internally limited Thermal data Table 4. Symbol Unit All terminal, to VGO and GND Short circuit protected 2.2 Value Parameter Operating supply voltage ISB Standby current VSP Regulator set-point VNB Test condition Min. Typ. Max. Unit Tcase = +25C to =150C 8 Vov V Tcase = -40C to +25C 10 Vov V 300 A VGO = 12.6V; Tcase = 25C; 10k VGO to TS; F+, G & Tab (Slug) Grounded; L, DF, & P unconnected; Regulator NOT Activated. 10k between VGO and TS Curve shown in Figure 3 NTC thermistor with R25C = 10k; Tj = 90°C Curves shown in Figure 4 (with MURATA NTC NTH4G39A1) Generator output, no battery No battery, IOUT = 2A to 50% Max. Load VSP - 2 TC Thermal compensation Voltage @ VGO VLR Load regulation 6500 grpm, 10% to 95% load 4/10 VSP + 2 V Curves shown in Figure 4 and 5 300 mV L9473 Table 5. Symbol VSR Electrical specifications Electrical characteristcs (continued) (Tcase = -35°C to +150°C continuous unless otherwise specified) Parameter Test condition Min. Typ. Max. Unit Speed regulation 15A load, 2000 to 20,000 grpm 100 mV VF-ON Output saturation voltage IF = 6A, VGO = 14.0V, Tcase = 25C 750 mV VF-ON Output saturation voltage IF = 5A, VGO = 13.5V, Tcase = 125C 850 mV IF-LIM Field limit current(1) Current F+ Terminal to Gnd. @ Tcase  25C 9.0 A IF-LIM Field limit current1 Current F+ Terminal to Gnd. @ Tcase = +150C 6.0 A IG-MIN Min. generator current load Current measured @ generator output 0.5 A VD-F Field discharge diode IF = 6A, Tcase = 25C ID-R Diode reverse current VR = 20V FOSC Oscillation frequency During LRC operation VDF DF saturation voltage DF output leakage current IDF-LK FTURBO Internal clock frequency 1.85 V 1 mA 460 Hz IDF  10mA 0.8 V VDF < 25V 10 A 340 VDF = 32 - 35V; at 2.2k 400 4X Hz 1. The Field Drive capability shall not decrease as a function of temperature between 25°C and 150°C, at a rate faster than 0.024A/°C (for example, Field Drive shall be capable of 7.2A at 100°C). Figure 3. Set-point voltage vs. mounting tab temperature (10k between VGO and TS) 15.4 15.2 15.3 15.17 15.08 15 14.86 Volts 15.01 14.8 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 5/10 Electrical specifications Figure 4. L9473 Set-point voltage vs. thermistor temperature, Tj = 90°C (Not guaranteed by testing, depending on NTC characteristics) 15.2 15.04 15 14.88 14.8 14.6 14.73 Volts 14.49 14.4 14.2 14 13.91 13.8 13.6 13.53 13.4 -40 -20 0 20 40 60 80 100 120 NTC Temp Figure 5. Set-point voltages vs. mounting tab temperature (TS-Open) 15.0 14.8 Set Voltage 14.6 14.73 14.63 14.4 14.43 14.2 14.0 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 Temp Table 6. Symbol Diagnostic (Tcase = -35C to +150C unless otherwise specified) Parameter Conditions VOV Over voltage VUV Under voltage FP > FP-LRC , 10kohm between S_term and VGO Lamp ON saturation voltage IL = 0.5A (sinked by ASVR) VL-SAT VL-SAT-BO Lamp ON voltage (1) Min. Typ. Max. Units VSP + 1 VSP + 1.3 VSP + 2 V 11.8 V 1.33 1.45 V 3.8 5 V 1.85 V 1.3 s 10.95 >VL-ACT IL < 0.5A, VGO = Open; Tcase = -35C to 85C VL-RLY Lamp OFF (Relay Drive) saturation voltage (vs. B+) IL = 750mA (Sourced by ASVR) (2) T case < 125°C TDELAY Fault Indication Delay Time Delay before Lamp ON 0.9 1.1 1. 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. 2. When no fault is detected the Lamp terminal is pulled up by ASVR. 6/10 L9473 Electrical specifications Table 7. Fault indication Conditions Table 8. TDelay? Initial KEY-ON Bulb and Wiring Check (Lamp ON for 1 sec  15% after initial KEYON) No VGO > VOV Yes VP < VP-F AND VGO < VSP Yes FP < FP-TR @ VP-TR Yes No connection between battery and VGO No At start: Lamp ON until FP>FP-IR AND VP>VP-F. i.e. until VP reaches 8V. No Regulation characteristics Symbol Parameter Conditions Min. Typ. Max. Unit 1 1.15 V 0.78 mA 1.5 V 3.5 mA VL-PD L terminal regulator activate threshold VGO=12.6V 0.8 IL-PD L terminal pull down current VL = VL-ACT VGO=12.6V 0.09 VP-IR Initiate regulation phase voltage threshold Regulator Activated 1.1 Phase terminal current sink VP > 1.5V and < 12.6V VGO = 12.6V 0.25 IP 1.3 FP-IR Initiate regulation phase frequency 123 145 167 Hz FP-TR Terminate regulation phase frequency 59 72 86 Hz IRD Initiate regulation delay Regulator Activated, VP-IR AND FP-IR Conditions Met First Time. 2.5 3 3.5 s FSDC Field strobe duty cycle Regulator Activated AND (Regulation Terminated OR Regulation NOT Initiated) 16 18.75 22 % Load response control rate Field Drive Duty Cycle Increase 8.5 10 11.5 %/s LRC transition frequency LRC Enabled if FP < FP-LRC 255 300 345 Hz Soft-start LRC enabled until VSP reached regardless other conditions 34 40 46 %/s LRC FP-LRC SS 7/10 Package information 3 L9473 Package information In order to meet environmental requirements, ST (also) offers these devices in ECOPACK® packages. ECOPACK® packages are lead-free. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. Figure 6. Multiwatt8 mechanical data and package dimensions mm inch DIM. MIN. TYP. MAX. MIN. TYP. MAX. A 5 0.197 B 2.65 0.104 C 1.6 0.063 E 0.49 0.55 0.019 F 0.78 0.85 0.030 G 2.40 2.54 2.68 0.094 0.10 0.105 G1 17.64 17.78 17.92 0.69 0.70 0.71 H1 19.6 0.022 0.033 0.772 H2 20.2 L 20.35 L2 17.05 L3 OUTLINE AND MECHANICAL DATA 0.795 20.65 0.80 17.20 17.35 0.67 0.68 0.81 0.68 17.25 17.5 17.75 0.679 0.689 0.699 L4 10.3 10.7 10.9 0.406 0.421 0.429 L7 2.65 2.9 0.104 0.114 S 1.9 2.6 0.075 0.102 S1 1.9 2.6 0.075 0.102 U 0.40 0.55 0.015 0.022 Z 0.70 0.85 0.028 0.034 Dia1 3.65 3.85 0.144 0.152 Multiwatt8 (Pin 5 GND) 0043696 F 8/10 L9473 4 Revision history Revision history Table 9. Document revision history Date Revision Changes 20-May-1994 1 Initial release. 24-Oct-2008 2 Document reformatted. "Added ECOPACK mention" in Section 3: Package information. 19-Sep-2013 3 Updated Disclaimer. 9/10 L9473 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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