UNISONIC TECHNOLOGIES CO., LTD UAC3092A LINEAR INTEGRATED CIRCUIT ALTERNATOR VOLTAGE REGULATOR DESCRIPTION The UTC UAC3092A is designed for Load Response Control and voltage regulation of diode rectified alternator charging systems for automotive applications. FEATURES * Forced load response control (LRC) with heavy load transitions at low RPM * Voltage regulated to ± 0.1V @ 25°C * External resistor adjustable operating frequency * Regulation is effective with loads as high as 1.0A * Load dump protection of lamp, field control devices, and loads * Undervoltage, overvoltage , phase fault (broken belt) detection and duty cycle limited protections SOP-20 *Pb-free plating product number: UAC3092AL ORDERING INFORMATION Order Number Normal Lead Free Plating UAC3092A-S20-R UAC3092AL-S20-R UAC3092A-S20-T UAC3092AL-S20-T Package Packing SOP-20 SOP-20 Tape Reel Tube UAC3092AL-S20-R (1)Packing Type (1) R: Tape Reel, T: Tube (2)Package Type (2) S20: SOP-20 (3)Lead Plating (3) L: Lead Free Plating, Blank: Pb/Sn www.unisonic.com.tw Copyright © 2006 Unisonic Technologies Co., Ltd 1 of 5 QW-R121-005,B UAC3092A LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION Filter Buffer 1 20 VREF Remote Sense 2 19 Undervoltage Lamp Collector 3 18 Source Lamp Base 4 17 Gate 5 16 NC 6 15 Gnd 7 14 Vcc1 8 13 Vcc3 9 12 Supply Regulation Phase 10 11 Rate Gnd Oscillato Adjust VREFΦ Oscillator PIN DESCRIPTION PIN NO. 1 2 PIN NAME FB Sense Lamp Collector and Power-Up/Down Lamp Base Ground Ground Oscillator Adjust VREFΦ Oscillator DESCRIPTION This pin provides Sense input or the Supply Regulation input. The Sense input is input for the true battery voltage. This pin connects to drive the fault lamp. It is also used to sense a closed ignition 3 switch (voltage sense). 4 This pin provides base current to the fault lamp drive transistor (Q2). 5 This pin is for Ground return for the fault lamp control logic circuit. 6 IC ground 7 Connected to a resistor to ground that adjusts the internal oscillator frequency 8 This is a pin for the 1.1 V ~ 1.4 V reference voltage test. 9 This is a pin 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 Load Response Control recovery rate selector pin used to select a 11 Rate slow mode (floating) or fast mode (ground). The Supply Regulation pin is used as a representation of the alternator output 12 Supply Regulation voltage. This input also used to monitor overvoltage or load dump conditions. 13 Vcc3 Voltage supply for the internal Charge Pump. 14 Vcc1 Voltage supply for the entire IC except for the Charge Pump. 15 Ground Ground for the IC. 16 N/C No connection. 17 Gate The Gate Controls of the MOSFET used to energize the field winding. 18 Source MOSFET source reference for Field winding control. If this pin have voltage goes below 1.0 V, the fault lamp is turn on. The IC will 19 Undervoltage continue to function, but with limited performance. 20 VREF Pin for the Band gap reference voltage 1.7 V ~ 2.3 V. Note: Pin 8, and 20 are test points only UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R121-005,B UAC3092A LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM FB UV 1 19 VREF 20 VREF Φ 8 Bandgap Reference UTC UAC3092 A Lost Sense Circuit Sense (Remote) Supply Reg (Local ) Signal Combiner and switch Low Pass filter Buff + - + Phase + - Output Control 12 7 18 Power Up/Down Circuit Overvoltage Control Logic DAC Osc . Adjust Gate Undervoltage Regulate Counter Prescaler (24 ) 17 Charge Pump - Load Dump + X1 10 Vcc3 13 Power Supply Bias + - 2 12 Vcc1 14 Prescaler (26 ) 4 3 Lamp Control Logic 4 Source Lamp coII . Lamp Base 8 5 Divide By (1/12/48) Up/ Down Counter 4 (2 ) Gnd Oscillator 9 Oscillator UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 11 Rate 6 15 Gnd 3 of 5 QW-R121-005,B UAC3092A LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta=25℃) PARAMETER SYMBOL RATINGS UNIT VBAT 24 Power Supply Voltage 40 V Load Dump Transient Voltage (Note 1) +VMAX -2.5 Negative Voltage (Note 2) -VMIN Power Dissipation (Ta=125℃) PD 867 m/W Operating Junction Temperature TJ +150 ℃ Operating Ambient Temperature Range TOPR -35 ~ +125 ℃ Storage Temperature Range TSTG -45 ~ +150 ℃ 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. THERMAL DATA PARAMETER Thermal Resistance, Junction to Ambient SYMBOL θJA RATINGS 75 UNIT °C/W ELECTRICAL CHARACTERISTICS (External components per Figure 1,Ta=25℃, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT DC CHARACTERISTICS Regulation Voltage VREG Determined by external resistor divider 14.85 V Regulation Voltage Temperature TC -13 -11 -9.0 mV/℃ Coefficient Suggested Battery Voltage VBAT 11.5 14.85 16.5 V Operating Range Power Up/Down Threshold VPWR 0.5 1.2 2.0 V Voltage (Pin 3) IQ1 VBAT=12.8V, Ignition off, Ta=25℃ 1.3 2.0 mA Standby Current IQ2 VBAT=12.8V, Ignition off, -35℃≤Ta≤125℃ 3.0 Zero Temperature Coefficient 1.1 1.25 1.4 V VREFφ Reference Voltage, (Pin 8) Band Gap Reference Voltage VREF 1.7 2.0 2.3 V (Pin 20) Band Gap Reference TC -13 -11 -9.0 mV/℃ Temperature coefficient Sense Loss Threshold (Pin 2) SLOSS (TH) 0.6 1.0 V Phase Detection Threshold PTH 1.0 1.25 1.5 V Voltage (Pin 10) Phase Rotation Detection PROT 36 Hz Frequency (Pin 10) Undervoltage Threshold (Pin 19) UUV 1.0 1.25 1.5 V Overvoltage Threshold VOV Pin 2, or Pin 12 if Pin 2 is not used V 1.09(V ) 1.12(V ) 1.16(V ) Load Dump Threshold VLD Pin 2, or Pin 12 if Pin 2 is not used V 1.33(V ) 1.4(V ) 1.48(V ) REF REF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw REF REF REF REF 4 of 5 QW-R121-005,B UAC3092A LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTIC(Cont.) PARAMETER SYMBOL SWITCHING CHARACTERISTICS Fundamental Regulation Output f Frequency. (Pin 17) Suggested Clock Oscillator fosc Frequency Range, (Pin 9) Duty Cycle (Pin 17) StartDC At Start-up OVDC During Overvoltage Condition Low/High RPM Transition LRCFreq Frequency (Pin 10) LRCS LRCF LRC Duty Cycle Increase Rate LRCH TEST CONDITIONS MIN Clock oscillator frequency divided by 4096 Determined by external resistor, RT Low RPM Mode(LRCFreq<247Hz) Pin 11 =Open (Slow Rate) Low RPM Mode(LRCFreq<247Hz) Pin 11 =Grounded (Fast Rate) High R PMMode(LRCFreq>309Hz) Pin 11 = Don’t Care (LRC Mode is disabled) TYP MAX UNIT 68 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 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 5 of 5 QW-R121-005,B