UTC TL1451 LINEAR INTEGRATED CIRCUIT handbook
Contents
1. si Input Vcc 5V TIMING DIAGRAM Oscillator Triangle Waveform Error Amplifier Output Dead Time Input Voltage Short Circuit Protection AN LUI V V Comparator Input Voltage ASS H PWM Comparator Output Voltage Il Il I U l U l l U li l Dead Time 100 H Output Transistor Collector Waveform Alpe Protection Enable Terminal Waveform Short Circuit Protection ear eae He ot Ne H Comparator Output Sie A TEA 3 6V Power Supply Voltage 28VTYP gt f Protection Enable Time tpg 0 051 x 106 x Cpe in seconds UTC UNISONIC TECHNOLOGIES CO LTD 5 QW R103 011 A2. OO TUS 0 U UTC TL1451 LINEAR INTEGRATED CIRCUIT DUAL PULSE WIDTH MODULATION CONTROL CIRCUITS DESCRIPTION The UTC TL1451 incorporates on a single monolithic chip all the functions required in the construction of two pulse width modulation PWM control circuits Designed primarily for power supply control the TL1451 contains an on chip 2 5V regulator two error amplifiers an adjustable oscillator two dead time comparators undervoltage lockout circuitry and dual common emitter output transistor circuits DIP 16 FEATURES Complete PWM Power control Circuitry Completely Synchronized Operation Internal Undervoltage Lockout Protection Wide Supply Voltage Range Internal Short Circuit Protection Oscillator Frequency 500kHz Max Variable Dead Time Provides Control Over Total Range Internal Regulator Provides a Stable 2 5V Reference Supply PIN CONFIGURATIONS REF RT SCP ERROR 71 IN 2 IN ERROR AMPLIFIER AMPLIFIER 1 i 2 IN 2 1 FEEDBACK 2 FEEDBACK 1 DTC 2 DTC 1 OUT 2 OUT GND Vec UTC UNISONIC TECHNOLOGIES co LTD QW R103 011 A UTC TL1451 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM UTC UNISONIC TECHNOLOGIES CO LTD QW R103 011 A UTC TL1451 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS unless otherwise noted all is over operating free air temperature range Collector Output Voltage Y a v Colector Ouputouret ig a mA Power Diss
3. ipation TA lt 25 C DIP SOP Operating free air Temperature Range 20 TO 85 Storage Temperature Range 65 TO 150 Lead Temperature 1 6mm from Case for 10 Tcase Sec RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL Supply Voltage Vcc V ee l u l im l W jew Collector Output Vota w Cd s v Collector Output Current each Transistor lo 20 m Current into Feedback Terminal o 1 s mA Feedback Resistor er 130 PK Oscilator frequency __ 1 80 km j ELECTRICAL CHARACTERISTICS Over recommended operating free air temperature range Vcc 6V f 200kHz TA 25 C Unless otherwise specified PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Reference Section Output Voltage Change with Temperature TA 20 C to 25 C 0 1 1 TA 25 C to 85 C 0 2 1 Input Voltage Regulation Vcc 3 6V to 40V 2 125 nv Output Voltage Regulation lo 0 1mA to 1mA 75 mv Short Circuit Output Current Undervoltage Lockout Section Upper Threshold Voltage Vcc jis Jv L Threshold Vol VI 2 V ower Threshold Voltage Vcc ee yn ee o 80 120 mv EE SES spon Short Circuit Protection Control Section UTC UNISONIC TECHNOLOGIES CO LTD s QW R103 011 A UTC TL1451 LINEAR INTEGRATED CIRCUIT PARAMETER TEST CONDITIONS MIN TYP MAX UNIT karotes mont Volaos S01 Lee LES LU em Tu Voltage FEEDBACK Osci
4. llator Section Frequency CT 330pF RT 10kQ Cr 330pF Rr 10ko 10 Frequency Change with Voltage Vcc 3 6Vto 40V 19 J Frequency Change with Temperature TA 20 C to 25 C 0 4 2 TA 25 C to 85 C 0 2 2 Dead Time Control Section e Pt A Latch mode source Current DTC TAG eo s MA Hatched Input Voltage DITO R24 28 _ v Input threshold MEE at f T DTC Zero duy cycle Maximum duty cycle Error Amplifier Section Input Offset Voltage Vo FEEDBACK 1 25V nput Offset Current Vo FEEDBACK 1 25V Input Bias current Vo FEEDBACK 1 25V Common Mode Input Voltage Range Vcc 3 6V to 40V 1 05 to Resa 1 45 Open oop Voltage Amplification Rr 20Q 70 80 dB ge ae a ue Common mode Common mode Rejection Ratio ssi Ratio EE 1 Negative Output Voltage Swings Output Voltage Swing Output sink Current FEEDBACK A 25V ap MA Output source Current FEEDBACK Vip 0 1V Vo 1 25V 70 HA Output Section Collector off state Current Vo 50V iin Se We f AE Short Circuit Output Current Vo 6V 90 mA PWM Comparator Section Input Threshold Voltage at Zero duty cycle 2 05 2 25 V f 10kHz FEEDBACK Maximum duty cycle 1 2 1 45 TOTAL DEVICE Standby Supply Current Off state 1 8 COL e UTC UNISONIC TECHNOLOGIES CO LTD 4 QW R103 011 A UTC TL1451 LINEAR INTEGRATED CIRCUIT TEST CIRCUIT Test
Download Pdf Manuals
Related Search
UTC TL1451 LINEAR INTEGRATED CIRCUIT handbook