L9911 STMicroelectronics, L9911 Datasheet
L9911
Available stocks
Related parts for L9911
L9911 Summary of contents
Page 1
... Protected high side relay driver ■ Complex diagnostics ■ Load response control ■ Dfm output (field monitor) Description The L9911 is a monolithic multifunction alternator voltage regulator intended for use in automotive application. Table 1. Device summary Order code L9911F L9911P L9911I July 2007 ...
Page 2
... Contents Contents 1 Circuit operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 Voltage regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.3 Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.4 Load response control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Electrical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.3 Electrical characteristcs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.4 Principle of phase regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2/19 L9911 ...
Page 3
... Thermal data Table 5. Electrical characteristcs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 6. Load response control parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 7. Load response control timing options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 8. Correspondence of frequency (typical values) to application features . . . . . . . . . . . . . . . . 11 Table 9. Customization of L9911: combination of LRC, regulation, and application options . . . . . . 11 Table 10. Fault detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 11. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 List of tables 3/19 ...
Page 4
... High side/low side driver saturation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 9. Test mode to cancel soft start/attack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 10. Soft-start enable frequency range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 11. Soft start characteristics (always activated at engine start Figure 12. Soft start/attack characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 13. DFMonitor electrical configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 14. Short circuit drivers' protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 15. Multiwatt8 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4/19 L9911 ...
Page 5
... L9911 1 Circuit operation The alternator's voltage regulator performs the following main functions: 1. voltage regulation 2. protection 3. control fault diagnosis 4. load response control 1.1 Voltage regulation The alternator voltage is compared with a reference voltage in an amplifier, whose output determines the switching frequency of output power MOS whose current excites the coil of the alternator ...
Page 6
... RES + 6/ Phase sense input. Field monitor output. Reserved. Lamp terminal low side driver; relay terminal high side driver. Ground. Reserved. High side driver output. Sensed power supply RES GND-case L RES DFM P AC00344 Function L9911 ...
Page 7
... L9911 3 Electrical specification 3.1 Absolute maximum ratings Table 3. Absolute maximum ratings (T = -40 to 150°C, unless otherwise specified) j Symbol V DC supply voltage (2 min. @ 25°C) S Transient supply voltage (load dump) [see ] t<500ms Transient supply voltage (low energy spikes) (see Figure 7 T Junction temperature range ...
Page 8
... 25° 0V -40° 0V -25° 0V -150° resistive (see Figure 5) field I = 1A~0.9 · alt nom 1400rpm<rpm<RPMMAX = 0 F+ L9911 Min. Typ. Max. Unit 14.0 14.4 14.8 V -4.5 -3.5 -2.5 mV/°C 14.35 14.5 14.65 V -11.8 -10 -8.2 mV/°C 14.35 14.5 14. mV/°C ...
Page 9
... L9911 Table 5. Electrical characteristcs (continued -40°C to 150°C; unless otherwise specified) j Symbol Parameter Phase regulation max field ON DUTY-PR duty High side driver saturation V H_SAT Voltage (see Figure Low side driver saturation voltage V L_SAT (see Figure 8) Selfbias without supply lamp V LSB ...
Page 10
... T = -40 to150° 25° -40 to150° 25° -40 to150° 25° -40 to150° 25° -40 to150°C j t_SL = 2.5s LRC-A LRC-C L9911 Min. Typ. Max. Unit 0.5 50 µs 0.5 50 Min. Typ. Max. Unit 0 s 1.73 2 2.35 2.13 2.5 2.87 s 7.65 9 10. 108 ...
Page 11
... Considering the overall WW application scenario, there is a direct correspondence between Typical configurations A/B and regulation curve Vreg-1, and between typical configuration C and regulation curves V customizations for L9911 in the table below. Table 9. Customization of L9911: combination of LRC, regulation, and application options V / Config-A reg-1 LRC ...
Page 12
... Figure 4. V reg-3 15.1 15 14.9 14.8 14.7 14.6 14.5 14.4 14.3 14.2 14.1 14 13.9 13.8 13.7 13.6 13.5 -40 -30 -20 14.41V~14.82V @ -5°C 14.35V~14.65V @ 23°C 13.59V~14.40V @ 150°C 12/ Max. Typ. Min. Max. Typ. Min 100 110 120 130 L9911 140 150 ...
Page 13
... If phase peak voltage drops below V Figure 7. Application diagram _ 90% F+ DFM Voltage 10% t-rise t-fall t-TM t-TD on off on off on off t_ST t_SL Field Pre- Field Regulation excitation . PHH1 , phase regulation does not work. PHL1 ignition switch warning lamp + Field Stator Electrical specification Load L9911 +Vb / Vcc F+ DFM P GND to E.C.U. 13/19 ...
Page 14
... Electrical specification Figure 8. High side/low side driver saturation Figure 9. Test mode to cancel soft start/attack Figure 10. Soft-start enable frequency range 14/19 B+ Regulator Assy L9911 Control Circuit DFM COMP Vcan { EN-1~4 SOFT-START ENABLE FREQUENCY EN-RES L FILTER (tcan) CANCEL AND LATCH CONSTANT (50HZ) L9911 ...
Page 15
... L9911 Figure 11. Soft start characteristics (always activated at engine start) Ign off Engine speed (rpm) Field current (A) W/Lamp on off Ign Figure 12. Soft start/attack characteristics Engine Ign. Switch W/Lamp Ifield F+/DFM 0.5s min (soft attack inhibition Alt. speed) (soft start enable Alt. speed) ...
Page 16
... Regulator assy B+ Control Circuit F+ Field driver DFMon driver T< 25ms Filtering time Test detect VP<VPHH1 & VB+<Vreg VP<VPHH1 & VB+<Vreg VP<VPHH1 & VB+<Vreg VP<VPHH1 & VB+<Vreg VF+>VS1 & VB+ > Vov-d VP<VPHH1 & VB+<Vreg VB+<Vuv Valim R DFM to the ECU Test circuit Retry time L9911 ...
Page 17
... L9911 4 Package information In order to meet environmental requirements, ST offers this device in ECOPACK This package has a Lead-free second level interconnect. 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 ...
Page 18
... Modified Figure 2, Table 2 and Table 5; 2 Updated Figure 10, 11 and 14; Add Table 7. Add ordering numbers. Updated Table 5. 3 Added new tables 6-9. Added the L9911C part number. 4 Updated the Table 9. Document reformatted following new graphic layout. 5 Updated order codes, see Changes Table 1 ...
Page 19
... L9911 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...