L9911I

L9911 Car alternator multifunction smart voltage regulator Datasheet - production data  Thermal protection  Field short circuit protection  Protected diagnostic lamp driver  Protected high side relay driver  Complex diagnostics  Load response control  DFM output (field monitor)  Self start function '!0'03 Multiwatt8 Description The L9911 is a monolithic multifunction alternator voltage regulator intended for use in automotive application. Features It includes the control section, the field power stage, fault diagnostic circuit which drives a warning lamp, and the protection against short circuits  Fully monolithic design  High side field driver Table 1. Device summary Order code Temp. range, °C Package Packing Tj = -40 to +150 Multiwatt8 Tube L9911F L9911I L9911P L9911V L9911K L9911U September 2015 This is information on a product in full production. DocID10990 Rev 13 1/20 www.st.com Contents L9911 Contents 1 Circuit operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 Voltage regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.3 Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.4 Load response control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.5 Self start function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Electrical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.4 Principle of phase regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.1 5 2/20 Multiwatt 8 (pin 5 GND) package information . . . . . . . . . . . . . . . . . . . . . . 17 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 DocID10990 Rev 13 L9911 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Load response control parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Load response control timing options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Correspondence of frequency (typical values) to application features . . . . . . . . . . . . . . . . 11 Customization of L9911: combination of LRC, regulation, and application options . . . . . . 11 Fault detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Multiwatt 8 (pin 5GND) package mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Document revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 DocID10990 Rev 13 3/20 3 List of figures L9911 List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. 4/20 Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Vreg-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Vreg-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Vreg-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Vreg-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Output voltage rise/fall time (F+, DFM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Phase regulation characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 High side/low side driver saturation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Test mode to cancel soft-start/attack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Soft-start enable frequency range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Soft-start characteristics (always activated at engine start) . . . . . . . . . . . . . . . . . . . . . . . . 15 Soft start/attack characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 DF monitor electrical configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Short circuit drivers' protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Multiwatt 8 (pin 5GND) package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 DocID10990 Rev 13 L9911 1 Circuit operation 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; as the regulator is in fixed-frequency topology, the field switching frequency does not depend on the alternator characteristics. The regulators have an integrated filter in the voltage sensing path guaranteeing the correct behaviour of the devices also when the rectifier diodes feature very high switching spikes. The internal filtering allows the usage of the device also with very long cables connecting the alternator to the battery with an impedance so high to cause a superimposed ripple on the alternator voltage higher than 56 V. Consequently it doesn't need, in the standard application, any external component. Anyway an external capacitor (2.2 μF) must be inserted between A+ and ground when using the device with very long cables. 1.2 Protection It is present a protection against short circuits of the lamp and the relay power drivers (L) and of the field power driver (F+), a thermal drivers shutdown protection and an overvoltage protection of L power drivers. 1.3 Diagnosis The circuit detects fault conditions related to the phase and F+ status and receives informations from one of the three alternator phases. In order to prevent spurious indications, fault warnings are not displayed immediately but are delayed by a fixed time. 1.4 Load response control The internal circuit regulates the soft start characteristics (activated always at engine start) and the soft attack characteristics. 1.5 Self start function The device wakes up by the phase signal only. The phase signal must have a voltage amplitude higher than VPHL1 and a frequency higher than EN-x. DocID10990 Rev 13 5/20 19 Pin description 2 L9911 Pin description Figure 1. Pin connection (top view)  "  &  2%3  '.$ CASE  ,  2%3  $&-  0 '!0'03 Table 2. Pin description 6/20 N° Pin 1 P 2 DFM Field monitor output. 3 RES Reserved. 4 L 5 GND-case 6 RES 7 F+ 8 + B Function Phase sense input. Lamp terminal low side driver; relay terminal high side driver. Ground. Reserved. High side driver output. Sensed power supply. DocID10990 Rev 13 L9911 Electrical specification 3 Electrical specification 3.1 Absolute maximum ratings Tj = -40 to 150 °C, unless otherwise specified. Table 3. Absolute maximum ratings Symbol Value Unit DC supply voltage (2 min. @ 25 °C) 24 V - Transient supply voltage (load dump) [see Figure 8] t < 500 ms 40 V - Transient supply voltage (low energy spikes) (see Figure 8) ISO7637-1 pulse 1,2,3 /ISO7637-3 60 V Tj Junction temperature range -40 to 150 °C -40 to 150 °C 4 W VS Parameter Tstg, Tcase Storage and case temperature range Ptot 3.2 Total power dissipation (@ Tcase  150°C, Ifield  5A) - Reverse battery voltage (see Figure 8) @ 25°C, T = 15 sec. -2.5 V - Normal working condition reverse voltage (P vs. GND) -1.5 V - DC pin current on F+, B+, GND (bonding limitation) 15 A - ESD voltage MILSTD883C (All pins vs.GND) ±4 KV Value Unit ≤1.5 °C/W Thermal data Table 4. Thermal data Symbol Rth j-case 3.3 Parameter Thermal resistance junction-to-case Electrical characteristics Tj = -40 °C to 150 °C; unless otherwise specified. Table 5. Electrical characteristics Symbol Vbat Ib-sinked Ib-stby Parameter Test condition Min. Typ. Max. Unit Operating supply voltage - 7 - 18 V Supply battery current - - - 25 mA Standby current B+ = 12.5 V, F+ = 0 V - - 500 μA DocID10990 Rev 13 7/20 19 Electrical specification L9911 Table 5. Electrical characteristics (continued) Symbol Parameter Vreg 1 Vreg 2 Vreg 3 Regulated voltage & thermal drift. 3 configurations available, selectable by mask option (see Table 8). Vreg 4 Test condition Min. Typ. Max. Unit Ialt =1 A-0.9 · Inom; Tcase = 20 °C; 1400 < rpm < RPMMAX (see Figure 2) 14.0 -4.5 14.4 -3.5 14.8 -2.5 V mV/°C Ialt =10 A; Tcase = 23 °C; rpm = 6000 rpm; 15 V max. (see Figure 3) 14.35 -11.8 14.5 -10 14.65 -8.2 V mV/°C Ialt =10 A; Tcase = 23 °C; rpm = 6000 rpm (see Figure 4) 14.35 -6 14.5 -4 14.65 -2 V mV/°C Ialt =10 A; Tcase = 23 °C; rpm = 6000 rpm (see Figure 5) 13.95 -3.5 14.2 -2.5 14.3 -1.5 V mV/°C Vrpm - 1400