UNISONIC TECHNOLOGIES CO., LTD UPC1237 Preliminary LINEAR INTEGRATED CIRCUIT PROTECTOR IC FOR STEREO POWER AMPLIFIER DESCRIPTION UTC UPC1237 is a semiconductor integrated circuit designed for protecting stereo power amplifiers and loudspeakers. FEATURES * Wide supply voltage range of 25V~60V. * Contain a relay driver. (Max. I6=80mA) * Work as either latching function or automatic resetting function by using pin 3. (In both overload detection and output offset detection, either function can be selected.) * Single power supply. * Built-in output offset detection function. Both positive and negative output offset can be detected through pin2. * AC voltage can be detected. * Time delay function. The time delay form amplifier power ON to relay ON can be freely set by selecting external components. * The moment that amplifier-power is turned off, it can make relay broken OFF and then loudspeaker disconnected for amplifier to prevent a shock off noise. ORDERING INFORMATION Ordering Number Lead Free Halogen Free UPC1237L-G08-T UPC1237G-G08-T www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd Package Packing SIP-8 Tube 1 of 5 QW-R107-065.a UPC1237 1 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION 2 3 4 5 6 7 8 PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 Preliminary PIN NAME PIN1 PIN2 PIN3 PIN4 PIN5 PIN6 PIN7 PIN8 DESCRIPTION Input pin of overload detector Input pin of output offset detector Input pin of switch for latch/automatic-reset Input pin of AC-OFF detector GND Output pin of relay driver Input pin of VCC ON mute, setting delay time VCC BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R107-065.a UPC1237 Preliminary LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING (TA=25°C) PARAMETER SYMBOL RATINGS UNIT Power Supply Voltage VCC 60 V Pin 4 Maximum Voltage V4(MAX) 10 V Pin 7 Maximum Voltage V7(MAX) 8 V Pin 8 Maximum Voltage V8(MAX) 8 V Pin 1 Maximum Current I1(MAX) 3 mA Pin 2 Maximum Current I2(MAX) ±3 mA Pin 6 Maximum Current I6(MAX) 80 mA Power Dissipation (TA=75°C) PD 320 mW Operational Temperature TOPR -20 ~ +75 °C Storage Temperature TSTG -40 ~ +125 °C Note: 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. RECOMMENDED OPERATING CONDITION PARAMETER Supply Voltage SYMBOL VCC RATINGS 25 ~ 60 UNIT V ELECTRICAL CHARACTERISTICS (VCC=45V, TA=25°C, Using latching function) PARAMETER Pin 1 Threshold Voltage Pin 2 Positive Threshold Voltage Pin 2 Negative Threshold Voltage Pin 4 Threshold Voltage Pin 8 Reference Voltage SYMBOL VTH 1 VTH +2 VTH -2 VTH 4 V8 TEST CONDITIONS Level to invert at Pin 6 Level to invert at Pin 6 Level to invert at Pin 6 Level to invert at Pin 6 RL=1.5kΩ UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 0.58 0.54 -0.12 0.60 3.0 TYP 0.67 0.62 -0.17 0.74 3.4 MAX 0.76 0.70 -0.23 0.90 3.8 UNIT V V V V V 3 of 5 QW-R107-065.a UPC1237 LINEAR INTEGRATED CIRCUIT TEST CIRCUIT Switch positions Item VTH 1 VTH +2 VTH -2 VTH 4 V8 Preliminary SW 1 1 2 2 2 2 SW 2 3 1 2 3 3 SW3 2 2 2 1 2 TYPICAL APPLICATION CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 5 QW-R107-065.a UPC1237 Preliminary LINEAR INTEGRATED CIRCUIT 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-R107-065.a