CA3165 CT T ODU CEMEN 7 R P E A 74 T L OLE REP 00-442-7 OBS ENDED 8 M ns 1 .com COM pplicatio @harris E R NO ntral A entapp Ce : c Call or email May 1999 Electronic Switching Circuit Features Description • Switching Initiated by Damping of Internal Oscillator The CA3165 is a single chip electronic switching circuit intended primarily for ignition applications. It includes an oscillator that is amplitude-modulated by the rotor teeth of a distributor, a detector that develops the positive going modulation envelope, a Schmitt trigger that eliminates switching uncertainties. Both types include two complementary high current switched outputs for driving power transistors requiring up to 120mA. The CA3165E also includes two complementary low current outputs that incorporate internal current limiting and a non-inverting output amplifier with uncommitted input capable of switching 27mA. • Proximity Sensing of Rotational Motion [ /Title (CA3165) • Repeatable Timing of Switching States /Subject (Electronic Switching Circuit) •/Author Five Outputs - Two Complementary Pairs and One () Non-Inverting Output CA3165E1 /Keywords () •/Creator Two Outputs () - One Complementary Pair CA3165E /DOCINFO pdfmark Part Number Information PART [ /PageMode /UseOutlines NUMBER TEMPERATURE /DOCVIEW pdfmark PACKAGE CA3165E -40oC to +85oC 8 Lead Plastic DIP CA3165E1 -40oC to +85oC 14 Lead Plastic DIP The CA3165 is supplied in the 8 lead dual-in-line plastic package (E suffix) and in the 14 lead dual-in-line plastic package (E1 suffix). Pinouts CA3165 (PDIP) TOP VIEW CA3165 (PDIP) TOP VIEW OSC FB 1 8 FB_RF SENSE 2 7 V+ GND 3 6 DET_OUT OUTPUT 4 5 INV_OUT OSC FB 1 SENSE 2 © Harris Corporation 1999 10-25 13 FB_RF GND 3 12 V+ OUTPUT 4 11 NC +SIGNAL 5 10 DET_OUT INV_OUT 6 9 AMPL_IN –SIGNAL 7 8 AMPL_OUT CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures. Copyright 14 NC File Number 1278.3 CA3165 Functional Block Diagrams DC SUPPLY 5V - 24V 200Ω 220Ω TO POWER TRANSISTORS 3.5V - 18V 12 0.01µF 847Ω NC 5 4 13 FEEDBACK RESISTOR (6kΩ ± 0.5%) OSCILLATOR SCHMITT TRIGGER DET 1 OUTPUT SWITCHING 10 2 6 220Ω OSCILLATOR CONDITION 7 9 3 6.8KΩ 0.01 R L = 100µH Q ≈ 53 0.01µF REPRESENTS ROTOR LOADING 1500 pF OUTPUT OUTPUT 8 AMP 0.0047µF 100K TERMINAL 10 TERMINAL 4 TERMINAL 5 TERMINAL 6 TERMINAL 7 TERMINAL 8 Unloaded Low High High Low Low Low Loaded High Low Low High High High FIGURE 1. FUNCTIONAL BLOCK DIAGRAM FOR CA3165E1 DC SUPPLY 5V - 24V 200Ω 220Ω TO POWER TRANSISTORS 3.5V - 18V 7 0.1µF 300Ω 4 FEEDBACK RESISTOR (6.49kΩ) 8 OSCILLATOR SCHMITT TRIGGER DET 1 OUTPUT 5 SWITCHING INVERTED OUTPUT 6 2 220Ω 3 0.01 L = 100µH Q ≈ 53 RA† RB† REPRESENTS ROTOR LOADING 1500 pF †VALUES OF RA AND RB DETERMINED BY CORRELATION. OSCILLATOR CONDITION TERMINAL 4 TERMINAL 5 TERMINAL 6 Unloaded High High Low Loaded Low Low High FIGURE 2. FUNCTIONAL BLOCK DIAGRAM FOR CA3165E 10-26 Specifications CA3165 Absolute Maximum Ratings Thermal Information DC Voltage (With Reference to Terminal 3) CA3165E1 Terminals 4, 6, 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24V Terminals 5, 7, 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Terminal 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V CA3165E Terminals 4, 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24V Terminal 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Current (At Terminals Indicated) CA3165E1 Terminals 4, 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120mA Terminals 5, 7 . . . . . . . . . . . . . . . . . . . . . . . . . -0.1mA to 0.1mA Terminal 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA CA3165E Terminals 4, 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120mA Thermal Resistance θJA Plastic DIP Package 8 Lead . . . . . . . . . . . . . . . . . . . . . 150oC/W Plastic DIP Package 14 Lead . . . . . . . . . . . . . . . . . . . . 100oC/W Operating Temperature Range . . . . . . . . . . . . . . . . . -40oC to +85oC Storage Temperature Range. . . . . . . . . . . . . . . . . . -65oC to +150oC Lead Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +265oC At Distance 1/16” ±1/32” (1.59 ±0.79mm) from Case for 10s Maximum Device Dissipation Plastic DIP Package 8 Lead Up to TA = +55oC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600mW Above TA = +55oC . . . . . . . . . . . . . Derate Linearly at 6.67mW/oC Device Dissipation Plastic DIP Package 14 Lead Up to TA = +55oC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 950mW Above TA = +55oC . . . . . . . . . . . . . . .Derate Linearly at 10mW/oC CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Electrical Specifications At TA = +25oC, V+ = 13V, Measured in the circuit of Figure 5 (CA3165E1) or Figure 6 (CA3165E) CA3165E1 PARAMETERS SYMBOL Input Current at Term. (Note 1) ∆ Output Voltage at Term. 4 V4 TEST CONDITIONS CA3165E MIN TYP MAX MIN TYP MAX UNITS Dwell - 18.4 - - 18.4 - mA Spark - 17.5 - - 17.5 - mA Dwell 12.8 - - 12.8 - - V Spark - - 0.5 - - 0.5 V Output Volatge at Term. 7 V7 Dwell - - 1 - - - V Output Voltage at Term. 8 V8 Dwell - - 0.9 - - - V 1.2 - - - - - V Dwell - 4.4 - - 4.4 - Vp-p Spark - 0.6 - - 0.6 - Vp-p Portion of Spark Oscillator Voltage at Term. 2 NOTE: 1. CA3165E at Term. 7 CA3165E1 at Term. 12 V2 ∆ I7 I12 10-27 CA3165 Schematic Diagrams 12 ALL RESISTANCES ARE IN KILOHMS R1 0.18 R2 0.18 Q1 R3 0.18 R4 0.18 Q2 R18 10 R5 0.18 Q3 Q4 R19 6.2 R20 4.3 Q36 Q22 Q23 Q19 Q34 R23 5.1 R22 2.4 Q18 R9 R37 4.5 Q33 Q20 Q6 3.3 Q9 Q32 Q21 R8 1 R36 4.6 R21 2.4 R17 10 Q5 R7 6.2 R6 0.6 9 3.3 Q7 R27 1.8 Q8 Q36 Q25 Q10 R10 0.35 R28 2 R25 Q24 2.1 R24 0.1 Q11 Q13 Q12 R11 2.9 R12 1.8 Q14 2 13 R26 2.1 R29 0.05 R 31 2 R30 0.1 Q27 R15 1 R14 0.1 R13 2 Q16 R16 2.5 Q15 Q28 R32 5 R33 0.1 R34 2 R35 5 Q31 Q30 Q29 8 Q37 Q26 Q39 Q40 Q38 Q17 3 10 4 5 6 7 FIGURE 3. SCHEMATIC DIAGRAM FOR CA3165E1 7 ALL RESISTANCES ARE IN KILOHMS R1 0.18 R2 0.18 Q3 Q2 Q1 R5 R4 0.18 0.18 R3 0.18 Q4 R18 10 Q5 R19 10 R17 10 R20 4.3 R22 2.4 Q31 Q18 Q16 R6 6.2 Q29 Q19 Q20 Q17 Q33 R7 0.6 R29 4.6 R23 5.1 R21 2.4 Q40 R8 3.3 1 R9 3.3 Q6 Q7 Q24 R25 2.1 Q10 Q32 R24B 2 Q23 R11 0.35 Q41 Q22 R24A 1.8 Q15 Q8 R30 4.5 Q30 R26 2.1 Q9 R16 0.1 Q13 Q11 R12 1.8 R10 2.9 Q12 Q14 Q38 R13 2 Q21 2 R31 0.1 R14 2.5 8 R15 1 R13A 0.1 R15A 0.05 Q25 R32 2 R27 5 R33 0.1 R28 5 Q36 Q26 Q28 Q27 Q35 Q39 3 R34 2 6 4 5 FIGURE 4. SCHEMATIC DIAGRAM FOR CA3165E 10-28 Q37 CA3165 Application Information Figure 5 and Figure 6 show the application of the CA3165 in a typical ignition system. TERMINAL DESCRIPTIONS TERMINAL CA3165E1 CA3165E FUNCTION 1 1 Oscillator Feedback Resistor, RF 2 2 220Ω Protective Resistor To Tank Circuit 3 3 Ground 4 4 Direct Output - R7 load resistor 200Ω ± 5%, and R8 to power Darlington 15Ω ± 10% 5 - Direct Output - Low Current - Not Connected 6 5 Inverted High Current Output 7 - Inverted Low Current Output Through C1 (0.01µF) to D3 and R3 (100kΩ) 8 - Output Amplifier Output - Through R6 and R5 (27Ω and 820Ω to Supply) 9 - Output Amplifier Input - through R4 (6800Ω) to D3 and C5 (0.0047µF) 10 6 Detector Output - C2 to Ground (0.01µF) 11 - No Connection 12 7 Circuit Supply Voltage Through R1 (220Ω Protective Resistor) to Automotive Supply 13 8 Oscillator Feedback Resistor RF to Terminal 1 14 - No Connection AUTOMOTIVE SUPPLY 5V - 24V C1 0.01µF H.V. R1 220 C2 R5 820 0.01µF R6 27 NC 14 NC 13 12 11 10 9 8 R4 6.8k H.V. RF R7 200 CA3165E1 TOP VIEW 1 R2 220 2 3 4 5 6 C6 0.0047µF 7 NC NC C4 0.01µF R3 100k L1 METALLIC TRIGGER WHEEL ONE TOOTH PER CYLINDER D2 C3 1500pF D3 R9 6.8k R8 15 D4 C5 0.0047 µF CURRENT LIMITER R10 220 R11 ≈ 1100 L1 SENSOR COIL INDUCTANCE ≈ 100µH UNLOADED Q ≈ 53 D1 R12 100 R13 0.18 SET FOR 4 AMPERES IN R13 EXCEPT AS NOTED, RESISTOR VALUES IN OHMS FIGURE 5. TYPICAL IGNITION SYSTEMS USING THE CA3165E1 10-29 CA3165 +13V 820 1W 5% R1 220 6 7 5 CA3165E TOP VIEW 4 3 8 2 1 R6 0.01µF C6 C3 0.01µF 220 VOUT 6490 ± 0.15% C2 1500pF SILVER MICA L1 L1 SENSOR COIL, INDUCTANCE ≈ 100µH, UNLOADED Q ≈ 53 200 1W ±5% ALL RESISTORS 1/2 W ±5% UNLESS OTHERWISE SPECIFIED RESISTOR VALUES IN OHMS METALLIC TRIGGER WHEEL, ONE TOOTH PER CYLINDER FIGURE 6. TYPICAL IGNITION SYSTEM USING THE CA3165E Application Information Figure 5 and Figure 6 show the application of the CA3165 in a typical ignition system. The oscillator on the chip operates at about 400kHz as determined by the tuned circuit L1, C2. The amplitude of the oscillation is detected on the chip and applied to a Schmitt trigger which sets the terminal voltage as shown in the chart in Figure 1 and Figure 2 for the unloaded condition of the oscillator. As a metallic tooth in the rotor passes the coil L1, eddy-current losses occur which reduce the Q of the resonant circuit and decrease the amplitude of the oscillations to a level below that of a reference in the detector circuit. The output terminals are then switched to states as shown in the chart in Figure 1 and Figure 2 for the loaded condition of the oscillator. The oscillation is maintained at this lower amplitude by switching in additional feedback in the oscillator circuit. The fact that the oscillator continues to operate at some minimum level during this dwell period eliminates timing variations which would occur if the oscillator had to be restarted by random noise. Spark occurs as terminal 4 is switched from high to low. The output amplifier clamps terminal 4 low through the regulator during the duration of the spark. For typical F-Tooth Rotor with Rod Sensor and 113µH of coil inductance, the Q and frequency with respect to rotor position was measured for the following positions CENTER 46 at 377kHz SLOT 6 at 390kHz FIRE 15 at 381kHz (Free air Q = 55.7 at 375kHz.) OSCILLATOR OSC LOADED DWELL PERIOD HIGH DETECTOR TERM 10 LOW The Dwell period represents the time that terminal 10 (CA3165E1) or terminal 6 (CA3165E) is high, terminal 4 is low, and the coil is charged. The value of the oscillator feedback, resistor, RF , is selected to set the dwell period. With a sintered-iron 8 f-tooth rotor, a typical value of RF is 6500Ω for 28.5 degrees of dwell out of a 45 degree cycle. For a star-type rotor and a particular coil in a typical distributor, the feedback resistor would be larger (typically 8800Ω) depending on clearances, coil geometry and tooth shape. 10-30 HIGH TERM 4 LOW DWELL DWELL COIL CHARGE SPARK FIGURE 7. TIMING SEQUENCE OSC UNLOADED