L9918

L9918 Data brief Alternator voltage regulator with LIN interface for 12 V applications Features PENTAWATT In Line Bare die GADG1604191311PS • • • • • • • • • • • • • • • • AEC-Q100 qualified Closed loop voltage control Regulated voltage with thermal compensation function High side excitation driver with internal freewheeling circuit Load response control (LRC) and Return LRC Self-start activation by phase signal Current limitation and overcurrent protection Thermal protection Physical Layer compliant with LIN 2.2A spec. Data Link Layer compliant with LIN 1.3, 2.1, 2.2 and 2.2A specification 13 sets of LIN frames selectable Configurable parameters (see NVM parameter table A1) Configurable for 5, 6, 7, 8 or 9 pole pair alternator Compliant to VDA LIN-Generator-Regulator specification Full ISO26262 compliant, ASIL-B systems ready Available as Bare die as well as in PENTAWATT In Line (TO220-5) package Description L9918 is an alternator voltage regulator equipped with LIN protocol interface. The device is intended to be used in automotive application for 12 V systems. The presence of NVM cells for device parameters programmability makes it suitable for a wide range of charging application. Product status link L9918 Product summary Order code Package Packing L9918 PENTAWATT In Line (TO220-5) Tube L9918BDTR Bare die Tape&Reel DB3952 - Rev 1 - June 2019 For further information contact your local STMicroelectronics sales office. www.st.com L9918 Functional description 1 Functional description The device is an alternator voltage regulator suited for 12 V system, able to communicate with ECU through LIN communication protocol. The device is housed into an alternator brush holder and it provides current to the excitation coil of the alternator (rotor) through a high side power MOSFET driver. The device is suitable for alternators with different poles pair number. An active freewheeling circuit is also integrated into the device. Target function of the device is to modulate the rotor current in order to keep the voltage on car loads steady to a target value (set point), whatever the vehicle demand. The set point target is typically commanded by the ECU and it is achieved using an internal voltage reference. Set point is communicated along with many others functional parameters during the regular device functioning. Slew rate control in combination with external filtering of the interface lines helps to realize electromagnetic compatibility. Figure 1. Simplified application diagram C1 B+ Load St at LIN C2 Stator PH Diodes Bridge Alternator 1.1 ECU Rotor Field r ato St or EXC Battery GND Regulator External component required The capacitors C1 (2.2 μF ceramic suggested) and C2 (220 pF suggested) to suppress radio frequency injection have to be connected as close as possible between the related pin and GND. DB3952 - Rev 1 page 2/10 L9918 Pin description 1.2 Pin description Figure 2. Pins connection diagram (top view) 5 PH 4 LIN 3 GND 2 B+ 1 EXC GADG1604191525PS Table 1. Pin description 1.2.1 N° PIN Function 1 EXC High side driver output to control the rotor current 2 B+ Device power supply and Battery voltage sensing 3 GND 4 LIN Communication terminal 5 PH Phase sense input Regulator ground EXC This pin is connected to the excitation coil (rotor) of the alternator. The IC supplies a current to the rotor in order to control the output current of the alternator when car load or car speed varies. Device target is to maintain battery voltage at defined set point. Inside the device is also embedded a freewheeling circuit, needed to discharge the rotor current when the High Side power is turned OFF. 1.2.2 B+ The device is supplied by this pin. This voltage is also used as feedback voltage by the regulation loop. 1.2.3 GND The device has one GND pin. 1.2.4 LIN This LIN pin represents the single-wire bus transmitter and receiver. It is suited for automotive bus systems and is based on LIN protocol defined in LIN bus specification v1.3, v2.1, v2.2 and v2.2A. 1.2.5 PH This pin is connected to one of the stator windings. Its input signal is used for rotor speed measurement, stator voltage monitoring as well as self-start detection. During the regulation, phase signal voltage level is continuously monitored. Phase regulation function is activated if phase amplitude is not addressing desired levels. DB3952 - Rev 1 page 3/10 L9918 Product characteristics 1.3 Product characteristics 1.3.1 Absolute maximum ratings Table 2. Absolute maximum ratings Symbol 1.3.2 Parameter Notes Min. Typ. Max. Unit VBLD Transient supply voltage (load dump) t < 400 ms Vcl V IBond DC pin current on EXC, B+, GND (bonding limitation) 15 A -8 8 kV ESDHBM ESD HBM (All pins vs.GND) R=1.5kΩ, C=100pF, RT=25°C ESDCDM ESD CDM on EXC and PH pins -750 750 V ESDCDM ESD CDM on B+ and LIN pins -500 500 V Internal clamping structure Table 3. Internal clamping structure Symbol Vcl Vcl_LIN 1.3.3 Parameter Notes Min. Typ. Max. Unit Internal central clamp voltage B+ current injected I=20mA 58 64 V Dedicated Clamp to LIN pin Current injected in LIN pin I=20mA 40 - V PIN number - absolute maximum ratings - operative range Table 4. PIN number - absolute maximum ratings - operative range n. Pin 1 ABS max rating operative range Unit Min. Max. Min. Max. EXC -2 B+ - 1.6 B+ V 2 B+ -0.3(1)- Vcl(3) 6 18 V 3 GND - - - - 4 LIN -27(2),(3) Vcl_LIN -3 18 V 5 PH -27(2) Vcl -3 18 V 1. 3.2 V, transient 5 s. 2. Value at cold temperature: -25 V. 3. LIN and B+ AMR not valid at the same time. 1.3.4 Thermal data Table 5. Thermal data Symbol Rth_j-case DB3952 - Rev 1 Parameter Thermal resistance junction-tocase Notes Related to TO220 Min. Typ. Max. Unit 2 °C/W page 4/10 L9918 Product characteristics Symbol Parameter Notes Tsd,1 Tsd,2 Tsd,3 Thermal shutdown threshold Temperature to disable EXC driver for chip protection (set by THERMAL_TH_SEL) Tsd,4 Tsdhy Thermal shut-down hysteresis Typ. Max. Unit 170 180 190 °C 165 175 185 °C 175 185 195 °C 180 190 200 °C 2 6 10 °C Temp_R Tj for full functional and full spec -40 150 °C Temp_F Tj for full functional with parameters deviation 150 190 °C 145 °C Temp_SRctrl Current SR disable temperature Temp_SRctrl_hi Temp_SRctrl hysteresis st Tstg, Tcase DB3952 - Rev 1 EXC from OFF STATE (due to thermal shutdown) to ON STATE Min. Storage and case temperature range Tj over which EXC current slew rate control is disabled (SR_HT_DIS) 125 Hysteresis from “disabled” state (entered because Tj>Temp_SRctrl) to “enabled” state 135 6 -40 °C 150 °C page 5/10 L9918 Package information 2 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. ECOPACK is an ST trademark. 2.1 PENTAWATT In Line package information Figure 3. PENTAWATT In Line package outline DIA A H3 C H1 L5 L7 L6 L2 L3 L4 D V4 F2 E F F3 G G1 H2 PROJECTION GADG1604191333PS Table 6. PENTAWATT In-Line package mechanical data Symbol DB3952 - Rev 1 Dimensions mm Min. Typ. Max. A 4.30 4.80 C 1.17 1.37 D 2.40 2.80 E 0.35 0.55 F 0.80 1.05 F 0.80 0.96 page 6/10 L9918 Bare die Symbol Dimensions mm Min. Typ. F2 1.10 1.40 F3 1.25 1.55 G 3.20 3.60 G1 6.60 7.0 H1 9.30 9.70 H2 10.40 H3 10.05 10.40 L2 23.05 23.80 L3 25.30 26.10 L4 0.90 2.90 L5 2.60 3.0 L6 15.10 15.80 L7 6.0 6.60 V4 Dia 2.2 Max. 90° 3.65 3.85 Bare die Die dimension, pads dimension and position will be provided on demand DB3952 - Rev 1 page 7/10 L9918 Revision history Table 7. Document revision history DB3952 - Rev 1 Date Version 11-Jun-2019 1 Changes Initial release. page 8/10 L9918 Contents Contents 1 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1 External component required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 2 1.2.1 EXC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2.2 B+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2.3 GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2.4 LIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2.5 PH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Product characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.3.2 Internal clamping structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.3.3 PIN number - absolute maximum ratings - operative range . . . . . . . . . . . . . . . . . . . . . . . . 4 1.3.4 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Package information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 2.1 PENTAWATT In Line package information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 Bare die . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 DB3952 - Rev 1 page 9/10 L9918 IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. For additional information about ST trademarks, please refer to www.st.com/trademarks. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2019 STMicroelectronics – All rights reserved DB3952 - Rev 1 page 10/10