L88312 UTC | Alldatasheet
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UNISONIC TECHNOLOGIES CO., LTD L88312 Preliminary LINEAR INTEGRATED CIRCUIT www.unisonic.com.tw 1 of 4 Copyright © 2017 Unisonic Technologies Co., Ltd QW-R123-021.a SHORT CIRCUIT PROTECT BLOCK FOR LNB DESCRIPTION The UTC L88312 is designed for short circuit protection of LNB application. The device oper ated same as a power switch when the LNB stage in normal operation. And the device will supply constant current when the LNB stage in short circuit state. The constant current can be set by external resistor between V IN pin and RSENSE pin. FEATURES * Wide operating voltage range: 8V~32V * Low on resistance:320 mΩ * Constant current set by external resistor * Thermal shutdown SOP-8 ORDERING INFORMATION Ordering Number Lead Free Halogen Free Package Packing L88312L-S08-R L88312G-S08-R SOP-8 Tape Reel MARKING
L88312 Preliminary LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 2 of 4 www.unisonic.com.tw QW-R123-021a PIN CONFIGURATION PIN DESCRIPTION PIN NO. PIN NAME DESCRIPTION
1 V IN Power Supply
2 NC No Connection
3 NC No Connection
4 V OUT V OUT to LNB Stage
5 NC No Connection
6 NC No Connection
7 GND Ground
8 RSENSE Sense Resistor for Constant Current Set
BLOCK DIAGRAM Vref=Vin-0.093 OTP RSENSEVIN VOUT TO LNB GND
L88312 Preliminary LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 3 of 4 www.unisonic.com.tw QW-R123-021a ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Power Supply Voltage (VCC to GND) V IN 32 V Operating Junction Temperature T J +150 C Operating Temp Range T OPR -40 ~ +105 C Storage Temperature Range T STG -55 ~ +150 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. ELECTRICAL CHARACTERISTICS (TA=25C, VCC=22V, RSENSE =0.25ohm, unless otherwise stated) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Supply Voltage V IN 8 32 V Supply Current I IN No load, R SENSE =VIN 3 6 mA IOUT Limit IO_LIMIT Io sweep 320 370 420 mA On Resistance R ON R SENSE=VIN 320 mohm OTP_ON 155 C Over Temp Protect OTP_OFF 125 C
L88312 Preliminary LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 4 of 4 www.unisonic.com.tw QW-R123-021a TYPICAL APPLICATION CIRCUIT Vref=Vin-0.093 OTP RSENSEVIN VOUT TO LNB GND 1N4004 0.25ΩFROM_RCV 103 UTC assumes no responsibility for equipment failures that result from u sing products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition rang es, 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 s ystems where malfunction of these products can be reasonably expected to result in personal injury. R eproduction in whole or in part is prohibited without the prior written consent of the copyright owner. T he information presented in this document does not form part of any quotation or contract, is believe d to be accurate and reliable and may be changed without notice.