UTC MC33092 LINEAR INTEGRATED CIRCUIT ALTERNATOR VOLTAGE REGULATOR DESCRIPTION The MC33092 is specifically designed for voltage regulation and Load Response Control (LRC) of diode rectified alternator charging systems, as commonly found in automotive applications. In maintaining system voltage, the MC33092 monitors and compares the system battery voltage to an externally programmed set point value and pulse width modulates an N–channel MOSFET transistor to control the average alternator field current. SOP-20 FEATURE *Forced Load Response Control (LRC) with Heavy Load Transitions at Low RPM *Capable of Regulating Voltage to ± 0.1 V @ 25°C *Operating Frequency Selectable with One External Resistor *< 0.1 V Variation over Speed Range of 2000 to 10,000 RPM *< 0.4 V Variation over 10% to 95% of Maximum Alternator Output *Maintains Regulation with External Loads as Low as 1.0 A *Load Dump Protection of Lamp, Field Control Devices, and Loads *Duty Cycle Limit Protection *Provides High Side MOSFET Control of a Ground Referenced Field Winding *Controlled MOSFET and Flyback Diode Recovery Characteristics for Minimum RFI *Optional 2.5 or 10 sec. LRC Rate Control (Osc. Freq. = 280 kHz) *Undervoltage, Overvoltage and Phase Fault (Broken Belt) Detection UTC SOP-24 UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R121-006,A UTC MC33092 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION 20-pin Package F i l t er B u f f er 1 20 V r ef R emot e S en s e 2 19 U n d er vol t ag e L am p C ol l ec t or 3 18 S ou r c e L amp B as e 4 17 G at e GND 5 16 NC GND 6 15 GND O s c i l l at or A d j u s t 7 14 Vcc1 V r ef 0 8 13 Vcc3 O s c i l l at or 9 12 S u p p l y R eg u l at i on P h as e 10 11 R at e 24-pin Package UTC F i l t er B u f f er 1 24 V r ef R emot e S en s e 2 23 U n d er vol t ag e L am p C ol l ec t or 3 22 S ou r c e L amp B as e 4 21 G at e GND 5 20 NC GND 6 19 NC O s c i l l at or A d j u s t 7 18 NC V r ef 0 8 17 NC O s c i l l at or 9 16 NC P h as e 10 15 GND R at e 11 14 Vcc1 S u p p l y R eg u l at i on 12 13 Vcc3 UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R121-006,A UTC MC33092 LINEAR INTEGRATED CIRCUIT PIN DESCRIPTION 20-pin Package 24-pin Package PIN NAME DESCRIPTION PIN No. 1 1 2 2 3 3 4 4 5 5 6, 15 7 6,15 7 8 8 9 9 10 10 11 11 12 12 13 14 15,6 13 14 15,6 16,17,18, 19,20 21 22 16 17 18 This pin provides a filtered result of the Sense input (if the Sense input is used) or the Supply Regulation input (if the Sense input is not used). The Sense input is a remote, low current battery voltage reference input used to give an accurate representation of the true battery Sense voltage. This input is also used to monitor overvoltage or load dump conditions. Lamp Collector This pin connects to the collector of the transistor (Q2) used to drive the fault lamp. It is also used to sense a closed ignition switch (voltage and Power-Up/Down sense) which then turns power on to the IC. The Lamp Base pin provides base current to the fault lamp drive Lamp Base transistor (Q2). Grounded to provide a ground return for the fault lamp control logic Ground circuit. Ground IC ground reference pins. Oscillator Adjust A resistor to ground on this pin adjusts the internal oscillator frequency. This is a test point for the 1.1 V to 1.4 V reference voltage. It has a zero Vref0 * temperature coefficient. The reference is used internally for phase signal and undervoltage detection. Oscillator * Test point for checking the operation of the internal oscillator. The Phase input detects the existence of a magnetic field rotating Phase within the alternator. The Rate pin is used to select a slow mode (floating) or fast mode Rate (ground) Load Response Control recovery rate. The voltage on the Supply Regulation pin is used as a representation Supply of the alternator output voltage. This input also used to monitor Regulation overvoltage or load dump conditions. VCC3 Positive supply for the internal Charge Pump. VCC1 Positive supply for the entire IC except for the Charge Pump. Ground Ground reference for the IC. No connection. N/C FB Controls the Gate of the MOSFET used to energize the field winding. Field winding control MOSFET source reference. If the voltage at this pin goes below 1.0 V, the fault lamp is guaranteed 23 Undervoltage to turn on. The IC will continue to function, but with limited 19 performance. Test point for the 1.7 V to 2.3 V Bandgap reference voltage. This voltage has a negative temperature coefficient of approximately –11 24** Vref * 20 mV/°C. NOTE: * Pins 8, 9 and 20(24**) are test points only. ** For 24-pin package. UTC Gate Source UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R121-006,A UTC MC33092 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM 1 FB UV Vref Vref0 19 20 8 Vcc1 14 Vcc3 13 23** 24** MC33092 Bandgap Reference Bias Lost Sense Circuit Sense (Remote) 12 Supply Reg (Local) Undervoltage Low Pass Filter Buff X1 + + - Phase Source Output Control Control Logic Counter Prescaler (24) Osc. Adjust 18 22** Regulate 12 7 Gate Load Dump + Overvoltage + +- 10 17 21** Charge Pump + - Signal Combiner and Switch 2 Power Supply DAC 4 Counter (28) Power Up/Down Circuit 3 Lamp Control Logic 4 Lamp Coll. Lamp Base 8 Divide By (1/12/48) Oscillator 9 Oscillator 5 Up/Down Counter (24) 11 Rate Gnd 6 15 Gnd Note: ** For 24-pin package ABSOLUTE MAXIMUM RATINGS PARAMETER Power Supply Voltage Load Dump Transient Voltage (Note 1) Negative Voltage (Note 2) Power Dissipation (Ta = 125°C) SOP-20 SOP-24 Operating Ambient Temperature Operating Junction Temperature Storage Temperature NOTES: 1. 125 ms wide square wave pulse. 2. Maximum time = 2 minutes. UTC SYMBOL RATINGS UNIT Vbat +Vmax –Vmin 24 40 -2.5 V PD 867 1000 -40 ~ +125 +150 -45 ~ +150 Ta Tj Tstg mW °C °C °C UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R121-006,A UTC MC33092 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Ta=25°C, unless otherwise specified) PARAMETER DC CHARACTERISTICS Regulation Voltage (Determined by external resistor divider) Regulation Voltage Temperature Coefficient Suggested Battery Voltage Operating Range Power Up/Down Threshold Voltage (Pin 3) Standby Current, Vbat = 12.8 V, Ignition off, Ta = 25°C Vbat = 12.8 V, Ignition off, -40°C≦Ta≦125°C Zero Temperature Coefficient Reference Voltage, (Pin 8) Band Gap Reference Voltage [Pin 20 (24**)] Band Gap Reference Temperature Coefficient Sense Loss Threshold (Pin 2) Phase Detection Threshold Voltage (Pin 10) Phase Rotation Detection Frequency (Pin 10) Undervoltage Threshold [Pin 19 (23**)] Overvoltage Threshold (Pin 2, or Pin 12 if Pin 2 is not used) Load Dump Threshold (Pin 2, or Pin 12 if Pin 2 is not used) SYMBOL MIN MAX UNIT 14.85 VReg Tc Vbat Vpwr TYP -13 11.5 0.5 IQ1 V -11 14.85 1.2 -9.0 16.5 2.0 mV/°C V V 1.3 2.0 3.0 mA mA IQ2 Vref0 1.1 1.25 1.4 V Vref TC 1.7 -13 2.3 -9.0 1.0 1.5 1.5 V mV/°C V V Hz V SLoss(th) PTh PRot VUV 1.0 2.0 -11 0.6 1.25 36 1.25 VOV 1.09(Vref) 1.12(Vref) 1.16(Vref) V VLD 1.33(Vref) 1.4(Vref) 1.48(Vref) V 1.0 SWITCHING CHARACTERISTICS Fundamental Regulation Output Frequency, [Pin 17 (21**)] (Clock oscillator frequency divided by 4096) Suggested Clock Oscillator Frequency Range, (Pin 9) (Determined by external resistor, RT) Duty Cycle [Pin 17 (21**)] At Start–up During Overvoltage Condition Low/High RPM Transition Frequency (Pin 10) LRC Duty Cycle Increase Rate Low RPM Mode (LRCFreq < 247 Hz), Pin 11 = Open (Slow Rat) Low RPM Mode (LRCFreq < 247 Hz), Pin 11 = Grounded (Fast Rate) High RPM Mode (LRCFreq > 309 Hz), Pin 11 = Don’t Care (LRC Mode is disabled) NOTE: ** For 24-pin package. UTC f 68 Hz fosc 205 280 350 kHz StartDC OVDC LRCFreq 27 3.5 247 29 4.7 273 31 5.5 309 % LRCS 8.5 9.5 10.5 LRCF 34 38 42 LRCH 409 455 501 Hz %/sec UNISONIC TECHNOLOGIES CO., LTD. 5 QW-R121-006,A UTC R2 12 Oscillator X1 RT Osc. Adjust 7 12.5k Phase 10 Supply Reg (Local) Lost Sense Circuit Counter Prescaler (24) 9 Oscillator + - Low Pass Filter R3 + - DAC 4 Counter (28) 2.5 sec 10 sec 8 11 Rate Divide By (1/12/48) Control Logic Regulate Overvoltage + + - Vcc1 Up/Down Counter (24) Output Control Gnd 6 15 Lamp Control Logic Power Up/Down Circuit Charge Pump 13 1.0k AlternateStator Configuration Power Supply 14 250 + - Undervoltage Bias Bandgap Reference Vref0 8 Load Dump + Vref 20 24** 12 23** FB UV 1 19 FB Buff 86k MC33092 Signal Combiner and Switch Notes:R1=R2=3.0k to 5.0k R3=10k to 15k RT=50k to 100k ** For 24-pin package. R1 Sense 2 45k <Remote> 28k 28k 2.0k 20k 2.0k Gnd 5 Lamp Base 4 10 BSP52T1 (Q2) Lamp Coll. 3 Source 18 22** Gate 17 21** Vcc3 Sense Ground MB850 Stator 500 Lamp Field MTB36N06E (Q1) B+Supply Phase Battery Lgnition UTC MC33092 LINEAR INTEGRATED CIRCUIT APPLICATION CIRCUIT UNISONIC TECHNOLOGIES CO., LTD. 6 QW-R121-006,A UTC MC33092 LINEAR INTEGRATED CIRCUIT Standby Current vs. Temperature ISB=Current from Vcc Supply Vcc=12.8V (see Figure 1) OFF) Vc1=0.5V (lgnition I(tot) =1.5V VPin2=VPin12 mA VPin10=VPin11=VPin19(23**)=0V 0.7 0.6 0.5 0.4 0.3 Turn-On Voltage vs. Temperature 1.8 1.6 1.5 1.4 1.3 1.2 1.1 0.2 -55 1.0 -55 75 100 125 50 25 0 -25 Ambient Temperature, Ta (°C) 2.1 2.0 1.9 1.8 -55 -25 0 25 50 75 1.26 TC Reference Voltage, Vref0 (V) Reference Voltage, Vref (V) Vref=Voltage at Pin 20(24**) Vcc=12.8V (see Figure 1) (lgnition OFF) Vc1=0.5V I(tot) mA =1.5V VPin2=VPin12 VPin10=VPin11=VPin19(23**)=0V 1.25 1.24 1.22 1.21 1.20 -55 100 125 Vcc=14.8V (see Figure 1) 70 Vc2=6.0V (S1 Closed) VPin2=VPin10=VPin12=VPin19(23**)=1.5V VPin11=0V 60 200 220 240 260 280 300 320 340 360 Frequency, f (kHz) Load Dump Protection 2.5 Input Voltage, Vinput (V) 80 0 25 50 75 100 125 Input Voltage vs. Output Duty Cycle 3.0 R=Resistance from Pin 7 to Ground f=Frequency at Pin 9 90 -25 Ambient Temperature, Ta (°C) Oscillator Frequency vs. Timing Resistor 100 Vref0=Voltage at Pin 8 Vcc=12.8V (see Figure 1) Vc2=6.0V (S1 Colsed) VPin2=VPin12=1.5V VPin10=VPin11=VPin19(23**)=0V 1.23 Ambient Temperature, Ta (°C) 110 50 75 100 125 0 -25 25 Ambient Temperature, Ta (°C) 0TC Reference Voltage vs. Temperature Reference Voltage vs. Temperature 2.2 Resistance, RT (kΩ) VON=Voltage at Pin 3 Vcc=12.8V (see Figure 1) VPin2=VPin12=1.5V VPin10=VPin11=VPin19(23**)=0V 1.7 Turn-on Voltage, Von (V) Standby Current, ISB (mA) 0.8 2.0 Vin=Voltage at Pin 2 or 12 Duty Cycle taken at Pin 17(21**) Vcc=14.8V (see Figure 1) Vc2=6.0V (S1 Closed) VPin10=1.5V@>309Hz VPin11=0V, VPin19(23**)=1.5V 1.96 1.95 1.94 1.93 0 10 20 30 40 50 60 70 80 90 100 Duty Cycle, DC (%) Note: ** For 24-pin package. UTC UNISONIC TECHNOLOGIES CO., LTD. 7 QW-R121-006,A UTC MC33092 LINEAR INTEGRATED CIRCUIT TYPICAL TEST CIRCUIT Vcc 250 1.0k FB UV Vref Vref0 20 8 1 19 23** 24** MC33092 Bandgap Reference Bias Lost Sense Circuit + - Signal Combiner and Switch 2 Sense (Remote) 12 Supply Reg (Local) 14 Low Pass Filter + Buff + - 10 + - Phase Oscillator Prescaler (24) 9 Oscillator Output RT DAC 4 Counter (28) Charge Pump Vcc3 21** 17 Gate Undervoltage 22** 18 2.0k Source Power Up/Down Circuit Regulate Output Control Control Logic Counter 13 Load Dump 12 7 Power Supply Overvoltage + +- X1 Vcc1 Lamp Control Logic 3 Lamp 2.0k Coll. S1 vc1 vc2 4 Lamp Base 8 Divide By (1/12/48) Rate 11 5 Up/Down Counter (24) Gnd 6 15 Gnd Note: ** For 24-pin package Figure 1. 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