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UC2856 Fiches technique(PDF) 3 Page - Texas Instruments |
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UC2856 Fiches technique(HTML) 3 Page - Texas Instruments |
3 / 9 page 3 UC1856 UC2856 UC3856 ELECTRICAL CHARACTERISTICS (cont.) Unless otherwise stated, these specifications apply for TA = −55°C to +125 °C for UC1856; − 40°C to +85°C for the UC2856; and 0°C to +70°C for the UC3856, VIN = 15V, RT = 10k, CT = 1nF, TA = TJ. UC1856/UC2856 UC3856 PARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Oscillator Section (cont.) Voltage Stability VIN = 8V to 40V 2 2 % Discharge Current TJ = 25°C, VCT = 2V 7.5 8.0 8.8 7.5 8.0 8.8 mA VCT = 2V 6.7 8.0 8.8 6.7 8.0 8.8 mA Sync Output High Level Io =−1mA 2.4 3.6 2.4 3.6 V Sync Output Low Level Io =+1mA 0.2 0.4 0.2 0.4 V Sync Input High Level CT = 0V, RT = VREF 2.0 1.5 2.0 1.5 V Sync Input Low Level CT = 0V, RT = VREF 1.5 0.8 1.5 0.8 V Sync Input Current CT = 0V, RT = VREF 1 10 1 10 µA VSYNC = 5V Sync Delay to Outputs CT = 0V, RT = VREF 50 100 50 100 ns VSYNC = 0.8V to 2V Error Amplifier Section Input Offset Voltage VCM = 2V 5 10 mV Input Bias Current −1 −1 µA Input Offset Current 500 500 nA Common Mode Range VIN = 8V to 40V 0 VIN − 2 0 VIN − 2V Open Loop Gain Vo = 1.2V to 3V 80 100 80 100 dB Unity Gain Bandwidth TJ = 25°C 1 1.5 1 1.5 MHz CMRR VCM = 0V to 38V, VIN = 40V 75 100 75 100 dB PSRR VIN = 8V to 40V 80 100 80 100 dB Output Sink Current VID =−15mV, VcOMP = 1.2V 5 10 5 10 mA Output Source Current VID = 15mV, VCOMP = 2.5V −0.4 −0.5 −0.4 −0.5 mA Output High Level VID = 50mV, RL (COMP) = 15k 4.3 4.6 4.9 4.3 4.6 4.9 V Output Low Level VID =−50mV, RL (COMP) = 15k 0.7 1 0.7 1 V Current Sense Amplifier Section Amplifier Gain VCS −= 0V, CL SS Open (Notes 3,4) 2.5 2.75 3.0 2.5 2.75 3.0 V/V Maximum Differential CL SS Open (Note 3) 1.1 1.2 1.1 1.2 V Input Signal (VCS+ − Vcs-) RL (COMP) = 15k Input Offset Voltage VCL SS = 0.5V 5 35 5 35 mV COMP Open (Note 3) CMRR VCM = 0V to 3V 60 60 dB PSRR VIN = 8V to 40V 60 60 dB Input Bias Current VCL SS = 0.5V, COMP Open (Note 3) −1 −3 −1 −3 µA Input Offset Current VCL SS = 0.5V, COMP Open (Note 3) 1 1 mA Input Common Mode Range 0 3 0 3 V Delay to Outputs VEA+ = VREF, EA−= 0V 120 250 120 250 ns CS+ − CS−= 0V to 1.5V Current Limit Adjust Section Current Limit Offset VCS- = 0V 0.43 0.5 0.57 0.43 0.5 0.57 V VCS+ = 0V, COMP = Open (Note 3) Input Bias Current VEA+ = VREF, VEA−= 0V −10 −30 −10 −30 µA Shutdown Terminal Section Threshold Voltage 0.95 1.00 1.05 0.95 1.00 1.05 V Input Voltage Range 0 5 0 5 V |
Numéro de pièce similaire - UC2856 |
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Description similaire - UC2856 |
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