CS3361YDR14

CS3361 Alternator Voltage Regulator FET Driver The CS3361 integral alternator regulator integrated circuit provides the voltage regulation for automotive, 3–phase alternators. It drives an external logic level N channel enhancement power FET 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. A STATOR Power Up feature is incorporated for systems which require power up activation by sensing the crank cycle of the starter at the stator. This eliminates unnecessary current drain when the ignition is turned on, but the car is not running. The CS3361 is available in an SO–14 package. This IC has customized current sense circuitry enabling it to drive FET transistors. Features • Drives Logic Level Power NFET • 80 V Load Dump • Temperature Compensated Regulation Voltage • Shorted Field Protection Duty Cycle, Self Clearing • STATOR Power Up http://onsemi.com 14 1 SO–14 D SUFFIX CASE 751A PIN CONNECTIONS AND MARKING DIAGRAM 1 DD GND NC OSC Lamp NC NC CS3361 AWLYWW 14 SC NC VCC Sense STATOR NC IGN A WL, L YY, Y WW, W = Assembly Location = Wafer Lot = Year = Work Week ORDERING INFORMATION Device CS3361YD14 CS3361YDR14 Package SO–14 SO–14 Shipping 55 Units/Rail 2500 Tape & Reel © Semiconductor Components Industries, LLC, 2002 1 August, 2002 – Rev. 10 Publication Order Number: CS3361/D CS3361 VCC IGN ENABLE Series Regulator Load Dump Detection and Protection VSUP OSC VSUP Regulator Comparator Sense + + + – VREG R Lamp Indicator S OSC RS Flop Set Dominate Q Device Driver R High Voltage Comparator + – VHV DELAY SC ENABLE STATOR Power Up LAMP STATOR Timer VSUP STATOR GND Figure 1. Block Diagram http://onsemi.com 2 CS3361 MAXIMUM RATINGS* Rating Storage Temperature Range, TS Junction Temperature Range Continuous Supply ICC Load Dump (@ VCC = 80 Vpeak) Lead Temperature Soldering: 1. 60 second maximum above 183°C. *The maximum package power dissipation must be observed. Reflow: (SMD styles only) (Note 1) Value –55 to +165 –40 to 150 27 400 230 peak Unit °C °C V mA °C ELECTRICAL CHARACTERISTICS (–40°C < TA < 125°C, –40°C < TJ < 150°C, 9.0 V ≤ VCC ≤ 17 V; unless otherwise specified.) Characteristic Supply Supply Current Enabled Supply Current Disabled Driver Stage Output High Voltage Output Low Voltage Output High Current Minimum ON Time Minimum Duty Cycle Short Circuit Duty Cycle Field Switch Turn On Rise Time Field Switch Turn On Fall Time Stator Input High Voltage Input Low Voltage Stator Time Out Lamp Output High Current Output Low Voltage Ignition Input High Voltage Input Low Voltage Oscillator Oscillator Frequency Rise Time/Fall Time Oscillator High Threshold COSC = 0.022 µF COSC = 0.022 µF COSC = 0.022 µF 90 – – – 17 – 210 – 4.5 Hz – V ICC > 1.0 mA ICC < 100 µA 1.8 – – – – 0.5 V V VLAMP @ 3.0 V ILAMP @ 30 mA – – – – 50 0.35 µA V High to Low – – 10 – 6.0 – – 100 – 6.0 600 V V ms IOL = 25 µA VDD = 1.2 V COSC = 0.022 µF – – – – – 5.5 – –10 200 – 1.0 15 15 – – –6.0 – 6.0 – – – 12 0.35 –4.0 – 10 5.0 75 75 V V mA µs % % µs µs – – – – – – 10 50 mA µA Test Conditions Min Typ Max Unit http://onsemi.com 3 CS3361 ELECTRICAL CHARACTERISTICS (continued) (–40°C < TA < 125°C, –40°C < TJ < 150°C, 9.0 V ≤ VCC ≤ 17 V; unless otherwise specified.) Characteristic Battery Sense Input Current Regulation Voltage Proportional Control High Voltage Threshold Ratio – @25°C, R1 = 100 kΩ, R2 = 50 kΩ – VHigh Voltage@LampOn VRegulation@50%Duty Cycle – –10 13.8 0.10 1.083 – – – – +10 15.8 0.25 1.190 µA V V V/V Test Conditions Min Typ Max Unit High Voltage Hysteresis 0.020 – 0.600 V PACKAGE PIN DESCRIPTION PACKAGE PIN # SO–14 1 2 3, 6, 7, 9, 13 4 5 8 10 11 12 14 PIN SYMBOL Driver GND NC OSC Lamp IGN Stator Sense VCC SC Output driver for external power switch. Ground. No Connection. Timing capacitor for oscillator. Base driver for lamp driver indicates no stator signal or overvoltage condition. Switched ignition power up. Stator signal input for stator timer. Battery sense voltage regulator comparator input and protection. Supply for IC. Short circuit sensing. FUNCTION TYPICAL PERFORMANCE CHARACTERISTICS 15.5 15 Battery Voltage 14.5 14 13.5 13 –40 –20 0 20 40 60 Temperature (°C) 80 100 120 Figure 2. CS3361 Battery Voltage vs. Temperature (°C) Over Process Variation http://onsemi.com 4 CS3361 APPLICATIONS INFORMATION The CS3361 is designed for use in an alternator charging system. 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. The Stator pin monitors the voltage from the stator and senses a stopped engine condition. It 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 I Lamp Indicator IGNITION SWITCH FIELD GND FIELD Winding BATT Figure 3. IAR System Block Diagram http://onsemi.com 5 CS3361 REGULATION WAVEFORMS The CS3361 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 comparator which controls the field through the output “Device Driver.” VBAT/N + VOSC VREG VBAT/N + VOSC VREG 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 Field Driver On Field Driver On Field Driver On Figure 4. 50% Duty Cycle, Steady State Figure 5. > 50% Duty Cycle, Increased Load RECTIFIER MR2502 MR2502 Figure 6. < 50% Duty Cycle, Decreased Load MR2502 STATOR MR2502 S R3 *C2 10 µF R1 100 kΩ C3 0.047 µF R2 50 kΩ C4 0.022 µF R7 10 Ω VCC Sense OSC IGN R6 20 kΩ R9 2.4 kΩ LAMP GND POWER GROUND I Lamp Indicator IGNITION SWITCH BATTERY MPSA13 *Note: C2 optional for reduced jitter. 250 Ω C1 0.1 µF R4 18 kΩ R5 SC 10 kΩ F Logic level Q1 N Channel MTB20N20E FIELD D1 MR2502 MR2502 MR2502 A STATOR Driver Figure 7. Typical Application DIagram http://onsemi.com 6 ÌÌ ÌÌ R10 510 Ω ÌÌÌ ÌÌÌ ÌÌ ÌÌ CS3361 PACKAGE DIMENSIONS SO–14 D SUFFIX CASE 751A–03 ISSUE F –A– 14 8 –B– 1 7 P 7 PL 0.25 (0.010) M B M 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. G C R X 45 _ F –T– SEATING PLANE D 14 PL 0.25 (0.010) K M M S J TB A S DIM A B C D F G J K M P R MILLIMETERS MIN MAX 8.55 8.75 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.19 0.25 0.10 0.25 0_ 7_ 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.337 0.344 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 BSC 0.008 0.009 0.004 0.009 0_ 7_ 0.228 0.244 0.010 0.019 PACKAGE THERMAL DATA Parameter RΘJC RΘJA Typical Typical SO–14 30 125 Unit °C/W °C/W http://onsemi.com 7 CS3361 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. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. PUBLICATION ORDERING INFORMATION Literature Fulfillment: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303–675–2175 or 800–344–3860 Toll Free USA/Canada Fax: 303–675–2176 or 800–344–3867 Toll Free USA/Canada Email: ONlit@hibbertco.com N. American Technical Support: 800–282–9855 Toll Free USA/Canada JAPAN: ON Semiconductor, Japan Customer Focus Center 2–9–1 Kamimeguro, Meguro–ku, Tokyo, Japan 153–0051 Phone: 81–3–5773–3850 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com 8 CS3361/D