UNISONIC TECHNOLOGIES CO., LTD UAC3092 LINEAR INTEGRATED CIRCUIT ALTERNATOR VOLTAGE REGULATOR DESCRIPTION SOP-20 The UAC3092 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 UAC3092 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-24 FEATURE *Forced Load Response Control (LRC) with Heavy Load Transitions at Low RPM *Capable of Regulating Voltage to ±0.1 V @ 25℃ *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 *Pb-free plating product number: UAC3092L ORDERING INFORMATION Order Number Normal Lead Free Plating UAC3092-S20-R UAC3092L-S20-R UAC3092-S20-T UAC3092L-S20-T UAC3092-S24-R UAC3092L-S24-R UAC3092-S24-T UAC3092L-S24-T Package Packing SOP-20 SOP-20 SOP-24 SOP-24 Tape Reel Tube Tape Reel Tube UAC3092L-S20-R (1)Packing Type (1) R: Tape Reel, T: Tube (2)Package Type (2) S20: SOP-20, S24: SOP-24 (3)Lead Plating (3) L: Lead Free Plating, Blank: Pb/Sn www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., Ltd 1 of 9 QW-R121-003,B UAC3092 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATIONS 20-pin Package F i l ter Buffer 1 20 VR E F Remote Sens e 2 19 Under v ol tage Lamp Col l ec tor 3 18 Sour c e Lamp Bas e 4 17 G ate G ND 5 16 NC G ND O s c i l l ator Adj us t 6 15 G ND 7 14 Vc c 1 VR E F 0 8 13 Vc c 3 O s c i l l ator 9 12 Suppl y Regul ati on Phas e 10 11 Rate 24-pin Package F i l ter Buffer 1 24 V RE F Remote Sens e 2 23 Under v ol tage Lamp Col l ec tor 3 22 Sour c e Lamp Bas e 4 21 G ate G ND 5 20 NC G ND O s c i l l ator Adj us t 6 19 NC 7 18 NC VR E F 0 8 17 NC O s c i l l ator 9 16 NC Phas e 10 15 G ND Rate 11 14 Vc c 1 Suppl y Regul ati on 12 13 Vc c 3 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 9 QW-R101-017,B UAC3092 LINEAR INTEGRATED CIRCUIT PIN DESCRIPTION 20-pin 24-pin Package Package PIN No. 1 2 3 4 5 6, 15 7 8 9 10 11 12 13 14 15,6 16 17 18 19 20 PIN NAME DESCRIPTION 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 2 Sense to give an accurate representation of the true battery voltage. This input is also used to monitor overvoltage or load dump conditions. Lamp This pin connects to the collector of the transistor (Q2) used to drive the fault Collector and lamp. It is also used to sense a closed ignition switch (voltage sense) which 3 Power-Up/Do then turns power on to the IC. wn The Lamp Base pin provides base current to the fault lamp drive transistor 4 Lamp Base (Q2). 5 Ground Grounded to provide a ground return for the fault lamp control logic circuit. 6,15 Ground IC ground reference pins. Oscillator A resistor to ground on this pin adjusts the internal oscillator frequency. 7 Adjust This is a test point for the 1.1V to 1.4V reference voltage. It has a zero 8 VREF0 temperature coefficient. The reference is used internally for phase signal and undervoltage detection. 9 Oscillator Test point for checking the operation of the internal oscillator. The Phase input detects the existence of a magnetic field rotating within the 10 Phase alternator. The Rate pin is used to select a slow mode (floating) or fast mode (ground) 11 Rate Load Response Control recovery rate. The voltage on the Supply Regulation pin is used as a representation of the Supply alternator output voltage. This input also used to monitor overvoltage or load 12 Regulation dump conditions. 13 VCC3 Positive supply for the internal Charge Pump. 14 VCC1 Positive supply for the entire IC except for the Charge Pump. 15,6 Ground Ground reference for the IC. No connection. 16,17,18, N/C 19,20 21 Gate Controls the Gate of the MOSFET used to energize the field winding. 22 Source Field winding control MOSFET source reference. If the voltage at this pin goes below 1.0 V, the fault lamp is guaranteed to turn 23 Undervoltage on. The IC will continue to function, but with limited performance. Test point for the 1.7 V to 2.3 V Band gap reference voltage. This voltage has 24 VREF a negative temperature coefficient of approximately –11 mV/℃ 1 FB Note: Pins 8, 9, 20(20 Pin Package) and 24(24 Pin Package) are test points only. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 9 QW-R101-017,B UAC3092 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM 1 FB UV VREF VREF0 8 19 20 Vcc1 14 Vcc3 13 23 ** 24 ** UAC3092 Bandgap Reference Bias Lost Sense Circuit Sense (Remote) 12 Low Pass Filter Buff + + - Phase 7 Osc. Adjust Gate 18 22** Load Dump + Power Up/Down Circuit Overvoltage + +- 10 17 21** Undervoltage X1 Supply Reg (Local) Charge Pump + - Signal Combiner and Switch 2 Power Supply Regulate Control Logic Counter Prescaler (24) Output Control 12 DAC 4 Counter (28) Lamp Coll. 4 Lamp Base 8 Divide By (1/12/48) Oscillator 9 Oscillator Lamp Control Logic Sourc e 3 11 Rate 5 Up/Down Counter (24) Gnd 6 15 Gnd Note: ** For 24-pin package UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 9 QW-R101-017,B UAC3092 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER Power Supply Voltage Load Dump Transient Voltage (Note 1) Negative Voltage (Note 2) SYMBOL Vbat +Vmax –Vmin SOP-20 SOP-24 Power Dissipation (Ta = 125℃) PD RATINGS 24 40 -2.5 867 1000 +150 -40 ~ +125 -45 ~ +150 UNIT V mW mW C C C Operating Junction Temperature TJ Operating Ambient Temperature TOPR Storage Temperature TSTG Note: 1. 125 ms wide square wave pulse. 2. Maximum time = 2 minutes. 3. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ELECTRICAL CHARACTERISTICS (Ta=25°C, unless otherwise specified) PARAMETER SYMBOL DC CHARACTERISTICS Regulation Voltage (Determined by external resistor VReg divider) Regulation Voltage Temperature Tc Coefficient Suggested Battery Voltage Vbat Operating Range Power Up/Down Threshold Vpwr Voltage (Pin 3) IQ1 Standby Current IQ2 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) TEST CONDITIONS MIN TYP MAX 14.85 UNIT V -13 -11 -9.0 mV/℃ 11.5 14.85 16.5 V 0.5 1.2 2.0 V 1.3 2.0 mA 3.0 mA Vbat = 12.8 V, Ignition off, Ta = 25℃ Vbat = 12.8 V, Ignition off, -40℃≦Ta≦125℃ VREF0 1.1 1.25 1.4 V VREF 1.7 2.0 2.3 V TC -13 -11 -9.0 mV/℃ 0.6 1.0 V 1.25 1.5 V SLoss(TH) PTH PPOT 36 Hz VUV 1.0 1.25 1.5 V VOV 1.09(VREF) 1.12(VREF) 1.16(VREF) V VLD 1.33(VREF) 1.4(VREF) 1.48(VREF) V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 1.0 5 of 9 QW-R101-017,B UAC3092 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER SYMBOL SWITCHING CHARACTERISTICS Fundamental Regulation Output f Frequency, [Pin 17 (21**)] Suggested Clock Oscillator fosc Frequency Range, (Pin 9) Duty Cycle [Pin 17 (21**)] At Start–up StartDC During Overvoltage Condition OVDC Low/High RPM Transition LRCFreq Frequency (Pin 10) LRCS LRCF LRC Duty Cycle Increase Rate LRCH Note: TEST CONDITIONS MIN Clock oscillator frequency divided by 4096 Determined by external resistor, RT 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) TYP MAX 68 UNIT Hz 205 280 350 kHz 27 3.5 29 4.7 31 5.5 % 247 273 309 Hz 8.5 9.5 10.5 34 38 42 409 455 501 %/sec ** For 24-pin package. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 9 QW-R101-017,B www.unisonic.com.tw UNISONIC TECHNOLOGIES CO., LTD R2 Oscillator X1 RT Osc. Adjust 7 12.5k Phase 10 Supply Reg (Local) 12 Lost Sense Circuit Counter Prescaler (24) 9 Oscillator + - Low Pass Filter + - DAC 4 Counter (28) 2.5 sec 10 sec 8 11 Rate Divide By (1/12/48) Control Logic Regulate Overvoltage + + - Load Dump + Vcc1 Up/Down Counter 4 (2 ) Output Control Gnd 6 15 Lamp Control Logic Power Up/Down Circuit Charge Pump 13 1.0k Alternate Stator Configuration Power Supply 14 250 + - Undervoltage Bias Bandgap Reference VREF VREF0 20 8 24 ** 12 23** FB UV 1 19 R3 FB Buff 86k UAC3092 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 Gnd 5 Lamp Base 10 BSP52T1 (Q2) 4 Lamp Coll. Sourc e 3 2.0k 18 22** Gate 17 21** Vcc3 Ground MB850 Stator 500 Lamp Field MTB36N06E (Q1) B+Supply Phase Sense Battery Lgnition UAC3092 LINEAR INTEGRATED CIRCUIT APPLICATION CIRCUIT QW-R101-017,B 7 of 9 UAC3092 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS Standby Current vs. Temperature ISB =Current from Vcc Supply Vcc=12.8V (see Figure 1) (lgnition OFF) Vc 1=0.5V I(tot) VPin2=VPin12mA =1.5V VPin10 =VPin11 =VPin19(23**)=0V 0.7 0.6 0.5 0.4 Turn-On Voltage vs. Temperature 1.8 0.3 1.6 1.5 1.4 1.3 1.2 1.1 0.2 -55 1.0 -55 75 100 125 50 0 25 -25 Ambient Temperature, Ta (°C) 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 =V Pin11 =VPin19(23**) =0V 2.1 2.0 1.9 -25 0 25 50 75 TC Reference Voltage, VREF0 (V) 1.26 1.8 -55 VREF0=Voltage at Pin 8 Vcc=12.8V (see Figure 1) 1.25 Vc2 =6.0V (S1 Colsed) VPin2 =VPin12 =1.5V 1.24 VPin10 =V Pin11 =VPin19(23**)=0V 1.23 1.22 1.21 1.20 -55 100 125 Ambient Temperature, Ta (°C) 3.0 R=Resistance from Pin 7 to Ground f=Frequency at Pin9 90 80 Vcc=14.8V (see Figure 1) 70 Vc2 =6.0V (S1 Closed) VPin 2=VPin10=VPin 12=VPin 19(23**)=1.5 V VPin11=0V 60 200 220 240 260 280 300 320 340 360 Frequency, f (kHz) 2.5 Input Voltage, VIN (V) 100 50 75 100 125 -25 0 25 Ambient Temperature, Ta (°C) Input Voltage vs. Output Duty Cycle Oscillator Frequency vs . Timing Resistor Resistance, RT (kΩ) 50 75 100 125 -25 0 25 Ambient Temperature, Ta (°C) 0TC Reference Voltage vs. Temperature Reference Voltage vs. Temperature 2.2 110 VON=Voltage at Pin 3 Vcc=12.8V (see Figure 1) VPin2 =VPin12 =1.5V VPin10 =V Pin11 =VPin19(23**) =0V 1.7 Turn-on Voltage, VON (V) Standby Current, ISB (mA) 0.8 2.0 Load Dump Protection 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) VPin 10=1.5V@>309Hz VPin 11=0V, VPin 19(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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 9 QW-R101-017,B UAC3092 LINEAR INTEGRATED CIRCUIT TYPICAL TEST CIRCUIT Vcc 250 1.0k FB UV VREF VREF0 8 1 19 20 23** 24** UAC3092 Bandgap Reference Bias Lost Sense Circuit Sense (Remote) 12 Supply Reg (Local) + - Signal Combiner and Switch 2 14 Low Pass Filter + Buff + - Phase RT Power Up/Down Circuit Output Control Control Logic Counter Prescaler (24) Oscillator DAC 4 Counter (28) 9 Oscillator Output 21** 17 Gate 22** 18 2.0k Load Dump 12 7 Charge Pump Vcc3 Undervoltage Regulate + - 10 13 Power Supply Overvoltage + +- X1 Vcc1 Lamp Control Logic Sourc e 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. UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 of 9 QW-R101-017,B