L9466 Car alternator voltage regulator Features ■ For air and liquid cooled applications ■ DF output (inverted field monitor) ■ Thermal protection ■ FIeld driver, lamp driver, relay driver, and DF (field monitor) short circuit protected ■ Load response control ■ Single phase autostart Multiwatt8 Description The L9466 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 L9466N Multiwatt8 Tube October 2008 Rev 2 1/11 www.st.com 11 Contents L9466 Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2/11 L9466 1 Block diagram Block diagram Figure 1. Block diagram Key SW. Fault Lamp Starter VGO L Relay R ASVR DF To ECM Battery P F+ Stator C Loads Field (Rotor) Rectifier Bridge 3/11 Pin description 2 L9466 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 NC Not connected 5 Gnd Internally connected to the Tab or Slug in MW-8. 6 DF Inverted Field Monitor Output 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 Pin connection (top view) Tab connected to pin 5 4/11 8 P 7 L 6 DF 5 GND 4 NC 3 G 2 F+ 1 VGO D02AT502B L9466 Electrical specifications 3 Electrical specifications 3.1 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol Parameter IOC Output current capability Ptot Power dissipation 6 W All terminal, to VGO and ground Thermal data Table 4. 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 3.3 Electrical characteristics Table 5. Electrical characteristics (Tcase = -35°C to +150°C continuous unless otherwise specified) Symbol Unit Internally limited Short circuit protected 3.2 Value Parameter Test condition Min. Typ. Max. Unit VOS Operating supply voltage Tcase = +25°C to =150°C 8 Vov V VOS Operating supply voltage Tcase = -40°C to +25°C 10 Vov V ISB Stand-by current VGO = 12.6V; Tcase = 25°C; 10kΩ; F+, G & Tab (Slug) Grounded; L, DF, & P unconnected; Regulator not activated. 300 μA VSP Regulator set-point VNB Generator output, no battery No battery, IOUT = 2A to 50% Max. Load TC Thermal compensation Voltage @ VGO VLR Load regulation 6500 grpm, 10% to 95% load 300 mV VSR Speed regulation 15A load, 2000 to 20,000 grpm 100 mV Output saturation voltage IF = 6A, VGO = 14.0V, Tcase = 25°C 750 mV VF-ON Curve shown in Figure 3 VSP - 2 VSP + 2 V Curve shown in Figure 3 5/11 Electrical specifications Table 5. Symbol L9466 Electrical characteristics (continued) (Tcase = -35°C to +150°C continuous unless otherwise specified) Parameter Test condition Min. Typ. Max. Unit 850 mV VF-ON Output saturation voltage IF = 5A, VGO = 13.5V, Tcase = 125°C IF-LIM Field limit current(1) Current F+ Terminal to Gnd. @ Tcase ≤ 25°C 9.0 A IF-LIM Field limit current(1) 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 1.85 V 1 mA 460 Hz IDF ≤ 10mA 0.8 V VDF < 25V 10 μA 340 400 FTURBO Internal clock frequency VDF = 32 - 35V; at 2.2kΩ 4X FTURBO IRD, SS, LRC Rate VDF = 32 - 35V; at 2.2kΩ ÷ 16 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. 6/11 Set-point voltage vs. mounting tab temperature L9466 Electrical specifications Table 6. Diagnostic (Tcase = -35°C to +150°C unless otherwise specified) Symbol Parameter Conditions VOV Over-voltage VUV Under-voltage FP > FP-LRC Lamp ON saturation voltage IL = 0.5A (sinked by ASVR) VL-SAT Min. Typ. Max. Units VSP + 1 VSP + 1.3 VSP + 2 V 1.8 V 1.33 1.45 V 3.8 5 V 1.85 V 1.3 s 0.95 >VL-ACT IL < 0.5A, VGO = Open; Tcase = -35°C to 85°C VL-SAT-BO Lamp ON voltage (1) VL-RLY Lamp OFF (relay drive) saturation voltage (vs. B+) IL = 750mA (Sourced by ASVR) (2) Tcase < 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. Table 7. Fault indication table Conditions TDelay Initial KEY-ON Bulb and Wiring Check (Lamp ON for 1 sec. ± 15% after initial KEY-ON) 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 Table 8. Symbol Regulation features 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 1.7 2 2.3 s IRD Initiate regulation delay Regulator activated, VP-IR and FP-IR Conditions Met First Time. 7/11 Electrical specifications Table 8. Regulation features (continued) Symbol FSDC LRC FP-LRC SS 8/11 L9466 Parameter Conditions Min. Typ. Max. Unit 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 L9466 4 Package information 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 4. 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 0.022 F 0.78 0.85 0.030 0.033 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 0.772 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 9/11 Revision history 5 L9466 Revision history Table 9. 10/11 Document revision history Date Revision Changes 17-May-1994 1 Initial release. 21-Oct-2008 2 Revalidation document. Document reformatted. Updated Section 2: Pin description on page 4. L9466 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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