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Os motores de busca de Datasheet de Componentes eletrônicos |
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Os motores de busca de Datasheet de Componentes eletrônicos |
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LM3842A Folha de dados(PDF) 2 Page - HTC Korea TAEJIN Technology Co. |
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LM3842A Folha de dados(HTML) 2 Page - HTC Korea TAEJIN Technology Co. |
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2 / 6 page  CURRENT MODE PWM CONTROLLER LM3842A/3A/4A/5A ELECTRICAL CHARACTERISTIC (Vcc=15V(Note 1), RT = 10kΩ, CT=3.3nF 0 ≤ TA ≤ 70℃ ; unless otherwise specified) Characteristic Symbol Test Condition Min Typ Max Unit REFERENCE SECTION Reference Output Voltage VREF Tj = 25℃, IO=1 mA 4.90 5.00 5.10 V Line Regulation Vo 12V ≤ Vcc ≤ 25V 2 20 mV Load Regulation Vo 1mA ≤ Io ≤ 20mA 3 25 mV Output Short Circuit Current Isc TA = 25℃ -85 -180 mA OSCILLATOR SECTION Normal Frequency FOSC Tj = 25℃ 47 52 57 kHz Voltage Stability Sv 12V ≤ Vcc ≤ 25V 0.2 1 % Amplitude Vosc 1.6 Vp-p ERROR AMPLIFIER SECTION Input B Current IIB -0.1 -2 μA Feedback Input Voltage VFB Vo=2.5V 2.42 2.50 2.58 V Open Loop Voltage Gain AVOL 2V≤ Vo ≤ 4V 65 90 dB Power Supplier Rejection Ratio PSRREA 12V ≤ Vcc ≤ 25V 60 70 dB Output Sink Current ISI VFB=2.7V, Vo - 1.1V 27 mA Output source Current ISO V = 2.3V, Vo=5V -0.5 -1.0 mA Output Voltage High VOH VFB=2.7V, RL=15kΩ to GND 56 V Output Voltage Low VOL VFB=2.7V, RL=15kΩ to VRGR 0.8 1.1 V CURRENT SENSE SECTION Input Voltage Gain Av (Note 2 & 3) 2.85 3 3.15 V/V Maximum Input Signal VMAX Vo=5V (Note 2) 0.9 1 1.1 V Power Supply Rejection Ratio PSRRSC 12V ≤ Vcc ≤ 25V 70 dB Input Bias Current IIB -3 -10 μA OUTPUT SECTION Isink = 20mA 0.1 0.4 V Isink = 20mA 1.5 2.2 V Isource = 20mA 13 13.5 V Isource = 20mA 12 13.0 V Rise Time Tj = 25℃, CL=1nF 45 150 nS Fail Time Tj = 25℃, CL=1nF 35 150 nS UNDERVOLTAGE LOCKOUT SECTION 14.5 16 17.5 8.5 10 11.5 PWM SECTION 14.5 16 17.5 TOTAL STANDBY CURRENT Operating Supply Current ICC Zener Voltage Viz Ii = 25mA 30 HTC VOL V 38 V mA Start-up Current 7.8 8.4 Maximum Duty Cycle Dmax 3842A/3843A 3844A/3845A Output Voltage Low Output Voltage High Start Threshold Minimum Operating Voltage (After Turn-on VOH Tr Tt 3842A/3844A Vth 8.2 V 3843A/3845A 0.17 0.3 mA 9 Vcc=6.5V for 3843A/3845A 9 Ist Vcc=14V for 3842A/3844A 7.8 8.4 7.0 7.6 VCC(MIN) 3842A/3844A 3843A/3845A − 2 − 0.17 0.3 14 mA 17 Vpin2=Vpin3=0V V V V V |
Nº de peça semelhante - LM3842A_08 |
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Descrição semelhante - LM3842A_08 |
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