L9911P STMicroelectronics, L9911P Datasheet
L9911P
Specifications of L9911P
Available stocks
Related parts for L9911P
L9911P Summary of contents
Page 1
... The L9911 is a monolithic multifunction alternator voltage regulator intended for use in automotive application. Table 1. Device summary Order code L9911F L9911I L9911P L9911V L9911K March 2011 It includes the control section, the field power stage, fault diagnostic circuit which drives a warning lamp, and the protection against short circuits. ...
Page 2
Contents Contents 1 Circuit operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 3
L9911 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 4
List of figures List of figures Figure 1. Pin connection (top view ...
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 ...
Page 6
Pin description 2 Pin description Figure 1. Pin connection (top view) Table 2. Pin description N° Pin DFM 3 RES GND-case 6 RES + 6/19 Phase sense input. Field ...
Page 7
L9911 3 Electrical specification 3.1 Absolute maximum ratings T = -40 to 150 °C, unless otherwise specified. j Table 3. Absolute maximum ratings Symbol V DC supply voltage (2 min °C) S Transient supply voltage (load dump) [see ...
Page 8
Electrical specification Table 5. Electrical characteristics (continued) Symbol Parameter V reg 1 Regulated voltage & thermal drift. V reg 2 3 configurations available, selectable by mask option (see Table 8). V reg 3 V reg 4 ΔV - rpm ΔV ...
Page 9
L9911 Table 5. Electrical characteristics (continued) Symbol Parameter If_leak Output field driver leakage current Phase regulation max field ON DUTY-PR duty High side driver saturation V H_SAT Voltage (see Figure Low side driver saturation voltage ...
Page 10
Electrical specification Table 5. Electrical characteristics (continued) Symbol Parameter t Output voltage rise time -TM t Output voltage fall time -TD 1. Guaranteed by design. Table 6. Load response control parameters Symbol Parameter t_ST_1 Soft start delay time (see Figure ...
Page 11
... V customization for L9911 in the table below. Table 9. Customization of L9911: combination of LRC, regulation, and application options Vreg-1/Config-A LRC timing 6 Pole 8 Pole options Pairs Pairs LRC-A L9911P nya LRC-B nya nya LRC-C nya nya LRC-D nya nya Figure 2. V reg-1 ...
Page 12
Electrical specification Figure 3. V reg-2 Figure 4. V reg-3 12/19 Doc ID 10990 Rev 9 L9911 ...
Page 13
L9911 Figure 5. V reg-4 Figure 6. Output voltage rise/fall time (F+, DFM) Figure 7. Phase regulation characteristics Doc ID 10990 Rev 9 Electrical specification 13/19 ...
Page 14
Electrical specification 3.4 Principle of phase regulation When V is above the regulated voltage, the field driver is controlled to keep phase peak B+ voltage from falling below V If phase peak voltage drops below V Figure 8. Application diagram ...
Page 15
L9911 Figure 12. Soft-start characteristics (always activated at engine start) Figure 13. Soft start/attack characteristics Doc ID 10990 Rev 9 Electrical specification 15/19 ...
Page 16
Electrical specification Table 10. Fault detection Root cause Alternator belt breaking Brushes open Field driver open Field interruption Field short circuit to the battery Field short circuit to the ground Battery discharge Note: The diagnostic result is disabled during the ...
Page 17
L9911 4 Package information In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ® ...
Page 18
Revision history 5 Revision history Table 11. Document revision history Date 22-Jun-2004 18-May-2005 07-Nov-2005 28-Nov-2005 11-Jul-2007 09-Nov-2009 23-Jul-2010 25-Jan-2011 29-Mar-2011 18/19 Revision 1 Initial release. Modified Figure 2, Table 2 and Table 5; 2 Updated Figure 10, 11 and 14; ...
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. ...