UNISONIC TECHNOLOGIES CO., LTD U9751B LINEAR INTEGRATED CIRCUIT DOUBLE CHANNELS PWM CONTROLLER SOP-16 DESCRIPTION The UTC U9751B consists of two PWM control circuits. Two PWM controllers is independent each other. It is low cost in many applications. DIP-16 FEATURES * Switch frequency: 400KHz * ISINK =400mA * Wide work voltage * Programmable dead-time control * UVLO protection * SCP protection * Lower static supply current SSOP-16(150mil) *Pb-free plating product number: U9751BL APPLICATION * DC/DC converters for video cameras、backlight inverter and notebook computers etc. ORDER INFORMATION Order Number Normal Lead Free Plating U9751B-D16-T U9751BL-D16-T U9751B-S16-R U9751BL-S16-R U9751B-S16-T U9751BL-S16-T U9751B-R16-R U9751BL-R16-R U9751B-R16-T U9751BL-R16-T Package Packing DIP-16 SOP-16 SOP-16 SSOP-16 SSOP-16 Tube Tape Reel Tube Tape Reel Tube U9751BL-D16-R (1)Packing Type (2)Package Type (3)Lead Plating www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., Ltd (1) R: Tape Reel, T: Tube (2) D16: DIP-16, S16: SOP-16, R16: SSOP-16 (3) L: Lead Free Plating, Blank: Pb/Sn 1 of 6 QW-R103-034,A U9751B LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION CT 1 16 VREF RT 2 15 SCP EA1+ 3 14 EA2+ EA1- 4 13 EA2- FB1 5 12 FB2 DTC1 6 11 DTC2 OUT1 7 10 OUT2 GND 8 9 VCC PIN DESCRIPTION NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NAME CT RT EA1+ EA1FB1 DTC1 OUT1 GND VCC OUT2 DTC2 FB2 EA2EA2+ SCP VREF DESCRIPTION Capacitor connected to the pin controlling Oscillator frequency Resistor connected to the pin controlling Oscillator frequency Error Amplifier 1 positive Input Error Amplifier 1 Inverting Input Error Amplifier 1 Output, used for feedback output 1 Dead-Time Comparator Output 1 Output 1 Ground Power Supply Output 2 Dead-Time Comparator Output 2 Error Amplifier 2 Output, used for feedback output 2 Error Amplifier 2 Inverting Input Error Amplifier 2 positive Input Short Circuit Protection Input Internal 2.5V Reference Voltage UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R103-034,A U9751B LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM 16 15 14 Reference Voltage 11 12 13 10 9 + Iscp R PWM COMP S UVLO Shutdown + + 1.2V VREF PWM COMP + - Oscillator 1 2 3 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 5 6 7 8 3 of 6 QW-R103-034,A U9751B LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC +38 V Differential Input Voltage VI(DIFF) +20 V Output Voltage VOUT +38 V Output Current IOUT +450 mA ℃ Maximum Junction Temperature TJ +150 ℃ Operating Temperature TOPR -20 ~ +85 ℃ Storage Temperature TSTG -55 ~ +150 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. DC ELECTRONIC CHARACTERISTICS VCC=6V, f=200kHz (unless otherwise specified) PARAMETER SYMBOL Reference section Internal Reference Voltage VREF VREF Regulation with VCC △VREF VREF Regulation with IO(REF) △VREF VREF Regulation with Temperature Short-Circuit Output Current IO(SC) Undervoltage Lockout Section threshold Voltage(VCC) VTHR Short-Circuit Protection Control Section SCP Input Threshold Voltage VI(THR) SCP Comparator Threshold Voltage VCOM(THR) SCP Standby Voltage VSTN-BY SCP Latched Input voltage VI(LTH) Input (Source) Current II(SOURCE) Oscillator Section Frequency f Deviation of Frequency △f Frequency Regulation with Voltage △f/△V Frequency Regulation with Temperature Dead-time control section Latched Input Voltage △f/△T TEST CONDITIONS MIN TYP MAX UNIT 2.40 2.53 V mV mV 18 2.46 3.5 2 -0.1% -0.2% 22 ±1% ±1% 30 mA IO(REF) = 0.1mA,TA=25℃ 2.5 2.8 3.2 V TA= 25℃ 1.2 1.3 1.26 1.5 110 77 220 200 -2.5 V V mV mV µA IOUT =1mA VCC =3.6V ~ 40V IOUT = 0.1mA to 1mA TA=-20℃~ 25℃ TA=25℃ ~ 85℃ VOUT =0 No pull-up No pull-up VIN=0.7V, TA=25℃ CT=220pF, RT=10K CT=220pF, RT=10K VCC=3.6V to 40V TA=-20℃ ~ 25℃ TA=25℃ ~ 85℃ VI(LTH) IOUR（DTC）=40µA Input Threshold Voltage at f=10kHZ VI(THR) Zero duty cycle Maximum duty cycle Input Bias Current Latch Mode (Source) Current Error-Amplifier Section Input Offset Voltage Common-Mode Input Voltage Range Positive Output Voltage Swing Negative Output Voltage Swing Input Offset Current II(BIAS) ISOURCE TA=25℃ VI(OFF) VI(CM) VO(POS) VO(NEG) II(OFF) VO(FB)=1.25V VCC=3.6V to 40 V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw -1.5 VO(FB)=1.25V -2.0 400 10% 1% -0.4% -0.2% 1.9 1.75 1.3 0.3 VREF-0.2 KHZ ±2% ±2% V 1.95 1.45 0.2 -620 2.15 1.7 1 ±6 1.6 1 ±100 V µA µA mV V V V nA 4 of 6 QW-R103-034,A U9751B LINEAR INTEGRATED CIRCUIT DC ELECTRONIC CHARACTERISTICS(Cont.) PARAMETER Input Bias Current Output Sink Current Output Source Current Common-Mode Rejection Ratio Open-Loop Voltage Gain Unity-Gain Bandwidth Output Section Output Saturation Voltage Short-Circuit Output Current Off-State Current PWM Comparator Section SYMBOL II(BIAS) IO(SINK) IO(SOURCE) CMRR GVO GBW TEST CONDITIONS VO(FB)=1.25V VI(DIFF)=-0.1V,VOUT=1.25V VI(DIFF)=0.1V,VOUT =1.25V RF=200KΩ VO(SAT) IO(SC) IO(OFF) IOUT=10mA VOUT =6V VOUT =50V Input Threshold Voltage at f=10kHz VI(THR) Zero duty cycle Maximum duty cycle Total Device Standby Supply Current Average Supply Current ISTN-BY IAVE Off-state RT =10K UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 1 -45 60 70 TYP 160 4.0 -90 80 80 1.5 MAX 500 UNIT nA mA µA dB dB MHZ 0.7 450 1 V mA µA 10 1.75 1.3 1.95 1.45 1.7 2.0 2.15 1.8 2.6 V mA mA 5 of 6 QW-R103-034,A U9751B LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION Vin R10 33k C3 100uF R2 33k IC1 C1 330pF R1 33k R4 10k C4 R3 C6 33k 0.027uF CT REF RT SCP FB1 FB2 EAINV1 EAINV2 EAOUT1 EAOUT 2 DTC1 DTC2 OUT1 OUT2 GND C20.33uF C5 R9 33k C7 0.027uF R13 1k R12 C8 Q1 C17 100 uF L2 20uH M1 9435 VCC UTC U9751 B Q2 R8 R5 R16 1k C12 C11 R6 10k D1 SCD24 R18 Vout1 R20 10k 1 % R25 C10 220 uF/16 V R21 C9 3.3k 1% R11 33 k R7 10k R15 1k C14 Q3 R14 Q4 R17 1k M2 9435 C13 100 uF L3 20uH Vout 2 R22 2k 1% R19 D2 SCD24 R23 C15 1.21 k 1% R24 C16 220 uF/16 V Typical Application TIMING WAVEFORM Error Amplifier Output CT Waveform Output Waveform (H shutdown) H L 1.3V SCP Waveform 0V H SCP Enabel Output L Timing Diagram 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 6 of 6 QW-R103-034,A