UAC3092-S24-R

UNISONIC TECHNOLOGIES CO., LTD UAC3092 ALTERNATOR VOLTAGE REGULATOR DESCRIPTION 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. LINEAR INTEGRATED CIRCUIT SOP-20 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 SOP-20 SOP-20 SOP-24 SOP-24 Packing Tape Reel Tube Tape Reel Tube UAC3092L-S20-R (1)Packing Type (2)Package Type (3)Lead Plating (1) R: Tape Reel, T: Tube (2) S20: SOP-20, S24: SOP-24 (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 PIN CONFIGURATIONS LINEAR INTEGRATED CIRCUIT 20-pin Package F i l ter Buffer Remote Sens e Lamp Col l ec tor Lamp Bas e G ND G ND O s c i l l ator Adj us t VR E F 0 O s c i l l ator Phas e 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VR E F Under v ol tage Sour c e G ate NC G ND Vc c 1 Vc c 3 Suppl y Regul ati on Rate 24-pin Package F i l ter Buffer Remote Sens e Lamp Col l ec tor Lamp Bas e G ND G ND O s c i l l ator Adj us t VR E F 0 O s c i l l ator Phas e Rate Suppl y Regul ati on 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 V RE F Under v ol tage Sour c e G ate NC NC NC NC NC G ND Vc c 1 Vc c 3 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 9 QW-R101-017,B UAC3092 PIN DESCRIPTION 20-pin 24-pin Package Package PIN No. 1 2 1 PIN NAME LINEAR INTEGRATED CIRCUIT DESCRIPTION 3 4 5 6, 15 7 8 9 10 11 12 13 14 15,6 16 17 18 19 20 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/℃ 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 BLOCK DIAGRAM LINEAR INTEGRATED CIRCUIT 1 FB UV VREF VREF0 8 19 20 23 ** 24 ** Vcc1 14 Vcc3 13 UAC3092 Lost Sense Circuit Bandgap Reference Bias + - Power Supply Charge Pump 17 21** Gate Undervoltage Signal Combiner and Switch Low Pass Filter Load Dump + Overvoltage + + Regulate Control Logic 12 DAC 4 Counter (28) 8 Divide By (1/12/48) Up/Down Counter (24) 6 15 Gnd 5 Gnd Power Up/Down Circuit 18 22** Sourc e 3 Lamp Coll. 2 Sense (Remote) 12 Supply Reg (Local) 10 Phase X1 Buff + + Counter Output Control Lamp Control Logic 4 Lamp Base 7 Osc. Adjust Prescaler (24) Oscillator 9 Oscillator 11 Rate Note: ** For 24-pin package UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 9 QW-R101-017,B UAC3092 ABSOLUTE MAXIMUM RATINGS PARAMETER Power Supply Voltage Load Dump Transient Voltage (Note 1) Negative Voltage (Note 2) Power Dissipation (Ta = 125℃) SOP-20 SOP-24 LINEAR INTEGRATED CIRCUIT SYMBOL Vbat +Vmax –Vmin PD 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. RATINGS 24 40 -2.5 867 1000 +150 -40 ~ +125 -45 ~ +150 UNIT V mW mW 　C 　C 　C 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) VREF0 VREF TC SLoss(TH) PTH PPOT VUV VOV 1.0 1.0 TEST CONDITIONS MIN TYP MAX UNIT 14.85 -13 11.5 0.5 Vbat = 12.8 V, Ignition off, Ta = 25℃ Vbat = 12.8 V, Ignition off, -40℃≦Ta≦125℃ 1.1 1.7 -13 1.25 2.0 -11 0.6 1.25 36 1.25 1.5 -11 14.85 1.2 1.3 -9.0 16.5 2.0 2.0 3.0 1.4 2.3 -9.0 1.0 1.5 V mV/℃ V V mA mA V V mV/℃ V V Hz V V 1.09(VREF) 1.12(VREF) 1.16(VREF) VLD 1.33(VREF) 1.4(VREF) 1.48(VREF) V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 9 QW-R101-017,B UAC3092 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 LINEAR INTEGRATED CIRCUIT TEST CONDITIONS Clock oscillator frequency divided by 4096 Determined by external resistor, RT MIN TYP MAX UNIT 68 205 27 3.5 247 280 29 4.7 273 9.5 38 455 350 31 5.5 309 10.5 42 501 Hz kHz % Hz 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) 8.5 34 409 %/sec Note: ** For 24-pin package. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 9 QW-R101-017,B Sense Phase 86k 250 1.0k Vcc1 13 Vcc3 VREF VREF0 20 8 14 24 ** 28k R3 FB UV 1 19 23** UAC3092 B+Supply 45k 28k UAC3092 Bandgap Reference Bias Charge Pump Gate 22** MTB36N06E (Q1) APPLICATION CIRCUIT UNISONIC TECHNOLOGIES CO., LTD Power Supply 21** www.unisonic.com.tw 17 20k Lost Sense Circuit FB 18 + - Undervoltage 2.0k Field Buff 2 Load Dump + Sense Signal Combiner and Switch Low Pass Filter Power Up/Down Circuit Sourc e 3 2.0k Lamp Coll. BSP52T1 (Q2) 4 Lamp Lgnition 12 X1 Supply Reg (Local) + + Counter 12 Prescaler (24) 9 Oscillator DAC 4 Counter (28) 2.5 sec 10 sec Divide By (1/12/48) 8 Control Logic Regulate Output Control Overvoltage + + - 500 10 Phase Lamp Control Logic Lamp Base Stator 5 Gnd 10 MB850 Up/Down Counter 4 (2 ) R1 12.5k 7 Oscillator R2 11 Rate Gnd 6 15 Battery Ground Alternate Stator Configuration RT Osc. Adjust LINEAR INTEGRATED CIRCUIT Notes:R1=R2=3.0k to 5.0k R3=10k to 15k RT=50k to 100k ** For 24-pin package. 7 of 9 QW-R101-017,B UAC3092 TYPICAL CHARACTERISTICS Standby Current vs. Temperature 0.8 ISB =Current from Vcc Supply Vcc=12.8V (see Figure 1) ( lgnition OFF) Vc 1=0.5V I(tot) VPin2=VPin12 =1.5V mA VPin10 =VPin11 =VPin19 ( 23**)=0V 1.8 1.7 LINEAR INTEGRATED CIRCUIT Turn-On Voltage vs. Temperature VON=Voltage at Pin 3 Vcc=12.8V (see Figure 1) VPin2 =VPin12 =1.5V VPin10 =V Pin11 =VPin19 (23**) =0V Standby Current, ISB (mA) Turn-on Voltage, VON (V) 0.7 0.6 0.5 0.4 0.3 0.2 -55 1.6 1.5 1.4 1.3 1.2 1.1 75 100 125 50 0 25 -25 Ambient Temperature, Ta ( °C) Reference Voltage vs. Temperature 1.0 -55 50 75 100 125 -25 0 25 Ambient Temperature, Ta ( °C) 0TC Reference Voltage vs. Temperature 1.26 2.2 2.1 2.0 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 VPin2 =VPin12 =1.5V VPin10 =V Pin11 =VPin19 (23**) =0V 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 50 75 100 125 -25 0 25 Ambient Temperature, Ta (°C) 1.9 1.8 -55 -25 0 25 50 75 100 125 Ambient Temperature, Ta (°C) Oscillator Frequency vs . Timing Resistor 110 100 90 80 Vcc=14.8V (see Figure 1) 70 Vc2 =6.0V (S1 Closed) 60 200 220 240 260 280 300 320 340 360 Frequency, f (kHz) Note: ** For 24-pin package. VPin 2=VPin10=VPin 12=VPin 19(23**)=1.5 V VPin11=0V Input Voltage vs. Output Duty Cycle 3.0 2.5 2.0 1.96 1.95 1.94 1.93 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 R=Resistance from Pin 7 to Ground f=Frequency at Pin9 Input Voltage, VIN (V) Resistance, RT (k Ω) 10 20 30 40 50 60 70 80 90 100 Duty Cycle, DC (%) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 9 QW-R101-017,B UAC3092 TYPICAL TEST CIRCUIT LINEAR INTEGRATED CIRCUIT Vcc 250 FB UV VREF VREF0 8 1 19 20 23** 24** 1.0k 14 Vcc1 13 Vcc3 UAC3092 Lost Sense Circuit Bandgap Reference Bias + - Power Supply Charge Pump 21** 17 Gate 22** 18 2.0k Sourc e 3 Lamp 2.0k Coll. S1 vc1 vc2 Undervoltage 2 Sense (Remote) 12 Supply Reg (Local) 10 Phase X1 Signal Combiner and Switch Low Pass Filter Buff + Load Dump Overvoltage + + Regulate + + Counter 12 Prescaler (24) DAC 4 Counter (28) Divide By (1/12/48) Control Logic 8 Up/Down Counter (24) Power Up/Down Circuit Output Control Lamp Control Logic 4 Lamp Base 5 Gnd 7 RT Oscillator 9 Oscillator Output Rate 11 6 15 Gnd Note: ** For 24-pin package Figure 1. U TC 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