CS3341, CS3351, CS387 Alternator Voltage Regulator Darlington Driver The CS3341/3351/387 integral alternator regulator integrated circuit provides the voltage regulation for automotive, 3−phase alternators. It drives an external power Darlington for control of the alternator field current. In the event of a charge fault, a lamp output pin is provided to drive an external darlington transistor capable of switching on a fault indicator lamp. An overvoltage or no STATOR signal condition activates the lamp output. The CS3341 and CS3351 are available in SOIC−14 packages. The CS387 is available as a Flip Chip. For FET driver applications use the CS3361. Use of the CS3341, CS3351 or CS387 with external FETs may result in oscillations. http://onsemi.com MARKING DIAGRAM 14 SOIC−14 D SUFFIX CASE 751A 14 1 CS33x1G AWLYWW 1 Features • • • • • • Drives NPN Darlington Short Circuit Protection 80 V Load Dump Temperature Compensated Regulation Voltage Shorted Field Protection Duty Cycle, Self Clearing Pb−Free Packages are Available* CS33x1 x A WL Y WW G MAXIMUM RATINGS Rating PIN CONNECTIONS Value Unit Storage Temperature Range, TS −55 to +165 °C Junction Temperature Range −40 to 150 °C Continuous Supply 27 V ICC Load Dump 400 mA 230 peak °C Lead Temperature Soldering: Reflow: (SMD styles only) (Note 1) = Specific Device Code 4 or 5 = Assembly Location = Wafer Lot = Year = Work Week = Pb−Free Package Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. 1. 60 second maximum above 183°C. 1 SOIC−14 14 SC NC VCC Sense STATOR NC IGN DD GND NC OSC Lamp NC NC Flip Chip, Bump Side Up DD SC GND VCC NC Sense OSC Lamp Stator IGN *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. © Semiconductor Components Industries, LLC, 2005 September, 2005 − Rev. 12 1 ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 4 of this data sheet. Publication Order Number: CS3341/D CS3341, CS3351, CS387 VCC Load Dump Detection and Protection ENABLE Series Regulator IGN VSUP OSC Sense + + Regulator Comparator + R − RS Flop Set Dominate Q VREG OSC Lamp Indicator S Device Driver R High Voltage Comparator DELAY + − SC VHV ENABLE STATOR Power Up LAMP STATOR Timer VSUP GND Figure 1. Block Diagram http://onsemi.com 2 Note: CS3341/CS387 Disconnected CS3351 Connected STATOR CS3341, CS3351, CS387 ELECTRICAL CHARACTERISTICS (−40°C < TA < 125°C, −40°C < TJ < 150°C, 9.0 V ≤ VCC ≤ 17 V; unless otherwise specified.) Characteristic Test Conditions Min Typ Max Unit Supply Current Enabled − − 12 25 mA Supply Current Disabled − − − 50 mA Supply Driver Stage Output High Current VDD = 1.2 V −10 −6.0 −4.0 mA Output Low Voltage IOL = 25 mA − − 0.35 V Minimum ON Time − 200 − − ms Minimum Duty Cycle − − 6.0 10 % Short Circuit Duty Cycle − 1.0 − 5.0 % Field Switch Turn On Rise Time − 30 − 90 ms Field Switch Turn On Fall Time − 30 − 90 ms Input High Voltage − 10 − − V Input Low Voltage − − − 6.0 V Stator Stator Time Out High to Low 6.0 100 600 ms Stator Power−Up Input High CS3351 only 10 − − V Stator Power−Up Input Low CS3351 only − − 6.0 V Output High Current VLAMP @ 3.0 V − − 50 mA Output Low Voltage ILAMP @ 30 mA − − 0.35 V Lamp Ignition Input High Voltage ICC > 1.0 mA 1.8 − − V Input Low Voltage ICC < 100 mA − − 0.5 V Oscillator Frequency COSC = 0.22 mF 65 − 325 Hz Rise Time/Fall Time COSC = 0.22 mF − 17 − − Oscillator High Threshold COSC = 0.22 mF − − 6.0 V −10 − +10 mA 13.5 − 16 V 0.050 − 0.400 V 1.083 − 1.190 − 0.020 − 0.600 V Oscillator Battery Sense Input Current Regulation Voltage Proportional Control High Voltage Threshold Ratio High Voltage Hysteresis − @25°C, R1 = 100 kW, R2 = 50 kW − VHigh Voltage @ LampOn VRegulation @ 50%Duty Cycle − http://onsemi.com 3 CS3341, CS3351, CS387 PACKAGE PIN DESCRIPTION PACKAGE PIN # SOIC−14 Flip Chip PIN SYMBOL 1 1 Driver Output driver for external power switch−Darlington 2 2 GND Ground 3, 6, 7, 9, 13 3 NC 4 4 OSC Timing capacitor for oscillator 5 5 Lamp Base driver for lamp driver indicates no stator signal or overvoltage condition 8 6 IGN 10 7 Stator Stator signal input for stator timer (CS3351 also powerup) 11 8 Sense Battery sense voltage regulator comparator input and protection 12 9 VCC Supply for IC 14 10 SC Short circuit sensing FUNCTION No Connection Switched ignition powerup ORDERING INFORMATION Package Shipping † CS3341YD14 SOIC−14 55 Units/Rail CS3341YD14G SOIC−14 (Pb−Free) 55 Units/Rail CS3341YDR14 SOIC−14 2500 Tape & Reel CS3341YDR14G SOIC−14 (Pb−Free) 2500 Tape & Reel CS3351YD14 SOIC−14 55 Units/Rail CS3351YD14G SOIC−14 (Pb−Free) 55 Units/Rail CS3351YDR14 SOIC−14 2500 Tape & Reel CS3351YDR14G SOIC−14 (Pb−Free) 2500 Tape & Reel CS387H Flip Chip Contact Sales Device †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. http://onsemi.com 4 CS3341, CS3351, CS387 TYPICAL PERFORMANCE CHARACTERISTICS 15.5 Battery Voltage 15 14.5 14 13.5 13 −40 −20 0 20 40 60 Temperature (°C) 80 100 120 Figure 2. Battery Voltage vs. Temperature (°C) Over Process Variation APPLICATIONS INFORMATION The CS3341 and CS3351 IC’s are designed for use in an alternator charging system. The circuit is also available in flip−chip form as the CS387. In a standard alternator design (Figure 3), the rotor carries the field winding. An alternator rotor usually has several N and S poles. The magnetic field for the rotor is produced by forcing current through a field or rotor winding. The Stator windings are formed into a number of coils spaced around a cylindrical core. The number of coils equals the number of pairs of N and S poles on the rotor. The alternating current in the Stator windings is rectified by the diodes and applied to the regulator. By controlling the amount of field current, the magnetic field strength is controlled and hence the output voltage of the alternator. Referring to Figure 7, a typical application diagram, the oscillator frequency is set by an external capacitor connected between OSC and ground. The sawtooth waveform ramps between 1.0 V and 3.0 V and provides the timing for the system. For the circuit shown the oscillator frequency is approximately 140 Hz. The alternator voltage is sensed at Terminal A via the resistor divider network R1/R2 on the Sense pin of the IC. The voltage at the sense pin determines the duty cycle for the regulator. The voltage is adjusted by potentiometer R2. A relatively low voltage on the sense pin causes a long duty cycle that increases the Field current. A high voltage results in a short duty cycle. The ignition Terminal (I) switches power to the IC through the VCC pin. In the CS3351 the Stator pin senses the voltage from the stator. This will keep the device powered while the voltage is high, and it also senses a stopped engine condition and drives the Lamp pin high after the stator timeout expires. The Lamp pin also goes high when an overvoltage condition is detected on the sense pin. This causes the darlington lamp drive transistor to switch on and pull current through the lamp. If the system voltage continues to increase, the field and lamp output turn off as in an overvoltage or load dump condition. The SC or Short Circuit pin monitors the field voltage. If the drive output and the SC voltage are simultaneously high for a predetermined period, a short circuit condition is assumed and the output is disabled. The regulator is forced to a minimum short circuit duty cycle. A Regulator STATOR Winding S Lamp I Indicator Ignition Switch FIELD GND FIELD Winding Figure 3. IAR System Block Diagram http://onsemi.com 5 BATT CS3341, CS3351, CS387 REGULATION WAVEFORMS The CS3341/3351/387 utilizes proportion control to maintain regulation. Waveforms depicting operation are shown in Figures 4, 5 and 6, where VBAT/N is the divided down voltage present on the Sense pin using R1 and R2 (Figure 7). A sawtooth waveform is generated internally. The amplitude of this waveform is listed in the electric parameter section as proportion control. The oscillator voltage is summed with VBAT/N, and compared with the internal voltage regulator (VREG) in the regulation VBAT/N + VOSC VREG comparator which controls the field through the output “Device Driver.” Figure 4 shows typical steady−state operation. A 50% duty cycle is maintained. Figure 5 shows the effect of a drop in voltage on (VBAT/N + VOSC). Notice the duty cycle increase to the field drive. Figure 6 shows the effect of an increase in voltage (above the regulation voltage) on (VBAT/N + VOSC). Notice the decrease in field drive. VBAT/N + VOSC VREG ÎÎ ÎÎ VBAT/N + VOSC VREG ÎÎ ÎÎ Field Driver On ÎÎ ÎÎ Field Driver On Figure 4. 50% Duty Cycle, Steady State Field Driver On Figure 5. > 50% Duty Cycle, Increased Load Figure 6. < 50% Duty Cycle, Decreased Load RECTIFIER MR2502 STATOR MR2502 S R3 250 W C1 0.1 mF *C2 10 mF R1 100 kW C3 0.047 mF VCC Sense R2 50 kW C4 0.022 mF MPSA13 or CS299 D1 MR2502 R4 18 kW STATOR SC R5 10 kW F Driver 2N6284 Power Darlington OSC IGN R7 A 10 W R6 20 kW LAMP GND POWER GROUND FIELD I R9 2.4 kW Lamp Indicator R10 510 W IGNITION SWITCH BATTERY *Note: C2 optional for reduced jitter. Figure 7. Typical Application DIagram http://onsemi.com 6 CS3341, CS3351, CS387 488 mm 506 mm 510 mm 506 mm 605 mm 506 mm 2.07 mm 1000 mm 594 mm 762 mm 742 mm 1.96 mm Figure 8. Flip Chip Dimensions and Solder Bump Locations, Bump Side Up http://onsemi.com 7 CS3341, CS3351, CS387 PACKAGE DIMENSIONS SOIC−14 D SUFFIX CASE 751A−03 ISSUE G −A− 14 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. 8 −B− P7 PL 0.25 (0.010)M B M 7 1 G C −T− SEATING PLANE K D14 PL 0.25 (0.010)M T B F RX 45_ S A MILLIMETERS INCHES DIM MIN MAX MIN MAX A 8.55 8.75 0.337 0.344 B 3.80 4.00 0.150 0.157 C 1.35 1.75 0.054 0.068 D 0.35 0.49 0.014 0.019 F 0.40 1.25 0.016 0.049 G 1.27 BSC 0.050 BSC J 0.19 0.25 0.008 0.009 K 0.10 0.25 0.004 0.009 M 0_ 7_ 0_ 7_ P 5.80 6.20 0.228 0.244 R 0.25 0.50 0.010 0.019 S J M PACKAGE THERMAL DATA Parameter SOIC−14 Unit RqJC Typical 30 °C/W RqJA Typical 125 °C/W ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. 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This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: N. American Technical Support: 800−282−9855 Toll Free Literature Distribution Center for ON Semiconductor USA/Canada P.O. Box 61312, Phoenix, Arizona 85082−1312 USA Phone: 480−829−7710 or 800−344−3860 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051 Fax: 480−829−7709 or 800−344−3867 Toll Free USA/Canada Phone: 81−3−5773−3850 Email: [email protected] http://onsemi.com 8 ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative. CS3341/D