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AS3845D1413 Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers |
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AS3845D1413 Datasheet(HTML) 5 Page - List of Unclassifed Manufacturers |
5 / 20 page 5 ASTEC Semiconductor AS384x Current Mode Controller Electrical Characteristics (contÕd) 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. The conditions are: V CC = 15 V, RT = 10 k½, and CT = 3.3 nF, unless otherwise stated. To override UVLO, V CC should be raised above 17 V prior to test. Parameter Symbol Test Condition Min. Typ. Max. Unit Error Amplifier Input Voltage V FB T J = 25¡C 2.475 2.500 2.525 V Input Bias Current I BIAS Ð0.1 Ð1 µA Voltage Gain A VOL 2 ² V COMP ² 4 V 65 90 1 dB Transconductance G m 1 mA/mV Unity Gain Bandwidth1 GBW 0.8 1.2 MHz Power Supply Rejection Ratio PSRR 12 ² V CC ² 25 V 60 70 dB Output Sink Current I COMPL V FB = 2.7 V, VCOMP = 1.1 V 2 6 mA Output Source Current I COMPH V FB = 2.3 V, VCOMP = 5 V 0.5 0.8 mA Output Swing High V COMPH V FB = 2.3 V, RL = 15 k½ to Ground 5 5.5 V Output Swing Low V COMPL V FB = 2.7 V, RL = 15 k½ to Pin 8 0.7 1.1 V Current Sense Comparator Transfer Gain2,3 AV CS Ð0.2 ² V SENSE ² 0.8 V 2.85 3.0 3.15 V/V I SENSE Level Shift 2 V LS V SENSE = 0 V 1.5 V Maximum Input Signal2 V COMP = 5 V 0.9 1 1.1 V Power Supply Rejection Ratio PSRR 12 ² V CC ² 25 V 70 dB Input Bias Current I BIAS Ð1 Ð10 µA Propagation Delay to Output1 t PD 85 150 ns Output Output Low Level V OL I SINK = 20 mA 0.1 0.4 V V OL I SINK = 200 mA 1.5 2.2 V Output High Level V OH I SOURCE = 20 mA 13 13.5 V V OH I SOURCE = 200 mA 12 13.5 V Rise Time1 t R C L = 1 nF 50 150 ns Fall Time1 t F C L = 1 nF 50 150 ns Housekeeping Start-up Threshold V CC(on) 3842/4 15 16 17 V 3843/5 7.8 8.4 9.0 V Minimum Operating Voltage V CC(min) 3842/4 9 10 11 V After Turn On 3843/5 7.0 7.6 8.2 V Output Low Level in UV State V OUV I SINK = 20 mA, VCC = 6 V 1.5 2.0 V Over-Temperature Shutdown4 T OT 125 ¡C |
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