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AS2208 Datasheet(PDF) 4 Page - List of Unclassifed Manufacturers |
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AS2208 Datasheet(HTML) 4 Page - List of Unclassifed Manufacturers |
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AS2208 Primary Side PWM Controller ASTEC Semiconductor 80 Electrical Characteristics Electrical Characteristics are guaranteed over full junction temperature range (0 to 105 ° C). Ambient temperature must be derated based on power dissipation and package thermal characteristics. Unless otherwise specified, the conditions of test are VCC = 15 V; BOK = 3 V; OV = 0V; RT = 680 Ω; CT = 10 nF. To override UVLO, VCC should be raised above 18 V prior to test. Parameter Symbol Test Condition Min Typ Max Unit 5 V Regulator Output Voltage VREG IREG = 1 mA, TJ= 25 ° C 4.90 5.00 5.10 V Line Regulation PSRR 9 ≤ VCC ≤ 18 V 5 15 mV Load Regulation 1 ≤ IREG ≤ 20mA 5 15 mV Temperature Stability TCREG 0.2 0.4 mV/ °C Total Output Variation Line, Load,Temperature 4.85 5.15 V Long-Term Stability Over 1,000 hrs at 25 °C5 25 mV Output Noise Voltage VNOISE 10 ≤ f ≤ 100kHz, TJ = 25°C50 µV Maximum Source Current IMAX VREG = 4.8 V 30 120 180 mA Oscillator Initial Accuracy FOSC TJ =25 °C 108 120 132 kHz Voltage Stability 9 ≤ VCC ≤ 18 V 0.2 1 % Temperature Stability TCF TMIN ≤ TJ ≤ TMAX 5% Amplitude VOSC VRT/CT peak-to-peak 1.55 V Upper Trip Point VH 2.80 V Lower Trip Point VL 1.25 V Discharge Current IDSC 7.50 8.70 9.50 mA Duty cycle Limit RT =680 Ω, CT =10nF, TJ =25°C46 50 55 % Over-Temperature Shutdown TOT 140 °C Current Sense Comparator Transfer Gain AV ISNS -0.2 ≤ VISNS ≤ 0.8 V 2.85 3.00 3.15 V/V ISNS Level Shift VLS VISNS = 0 V 1.50 V Maximum Input Signal VISNS MAX VCOMP =+5 V 1.00 1.08 1.20 V Input Bias Current IBIAS ISNS VCOMP =+5 V -1 -10 µA COMP Source Current ICOMPH VCOMP =+5 V 0.6 1.0 mA COMP Swing High VCOMPH 5.2 5.6 V Power Supply Rejection Ratio PSRR 9 ≤ VCC ≤ 18 V 70 dB Propagation Delay to Output tPB 85 150 ns |
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