전자부품 데이터시트 검색엔진 |
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UC2874-2 데이터시트(PDF) 3 Page - Texas Instruments |
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UC2874-2 데이터시트(HTML) 3 Page - Texas Instruments |
3 / 10 page 3 UC1874-1,-2 UC2874-1,-2 UC3874-1,-2 ELECTRICAL CHARACTERISTICS: Unless otherwise stated these specifications apply for TA = –55°C to +125°C for UC1874; TA = –25°C to +85°C for UC2874; 0°C to +70°C for UC3874; VCC = 12V, Ct = 680pF, CCAP =1 µF; CBOOT = 0.1µF; TA =TJ. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Overall Section Supply Current, Sleep SOFTSTART = 0V; TA=25°C 30 75 µA Supply Current, Operating 8.5 12 mA Supply Current, Standby UC2874-1, -2, UC3874-1, -2 2.5 3.5 mA Supply Current, Standby UC1874-1, -2 5.5 mA VCC Turn-on Threshold UCX874-2 10 10.5 V UCX874-1 4.5 4.8 V VCC Turn-off Threshold UCX874-2 8.5 9 V UCX874-1 4.1 4.4 V Voltage Amplifier Section Input Voltage TA = 25°C 1.97 2 2.03 V VSNS Bias Current –500 25 500 nA Transconductance ICOMp = +10 µAto–10µA, UC3874 -1, -2; UC2874-1, -2 400 675 1000 µMho Transconductance ICOMp=+5 µAto–5µA, UC1874-1,-2 250 675 1250 µMho VOUT High 2.9 3.1 3.25 V VOUT Low SB = VREF 1.85 V Output Source Current VOUT = 1V; UC3874-1,-2; UC2874-1,-2 10 35 µA VOUT = 1V; UC1874 -1,-2 5 35 µA Current Amplifier Section Input Offset Voltage VCOMP = 2.5V –6 0 6 mV Input Bias Current (SENSE)VCM = 2.5V –500 500 nA Open Loop Gain VCM = 2.5V, VOUT = 1V to 3.5V 80 110 dB VOUT High RCAOUT = 100k to GND, TA = 25°C 3.6 3.7 V VOUT Low RCAOUT = 100k to VREF, TA = 25°C 0.7 0.86 V Output Source Current VOUT = 0V, TA = 25°C 80 100 120 µA Common Mode REJ Ratio VCM = 2V to 3V 70 90 dB Gain Bandwidth Product FIN = 100kHz, 10mV p-p 2 3.5 MHz Reference Section Output Voltage IREF = 0mA, TA = 25°C 2.462 2.5 2.538 V IREF = 0mA 2.437 2.5 2.563 V Load Regulation IREF = 0mA to 5mA 2 ± 15 mV Line Regulation VCC = 12V to 24V 2 ± 15 mV Short Circuit Current VREF = 0V 10 20 25 mA Oscillator Section Initial Accuracy TA = 25°C 85 100 115 kHz Voltage Stability VCC = 12V to 18V 1 1.5 % Total Variation Line, Temperature 80 120 kHz Ramp Amplitude (p-p) TA = 25°C 2.48 2.7 2.85 V Ramp Valley Voltage TA = 25°C 0.86 0.95 V Sleep/Soft Start/Bootstrap Section Sleep Threshold Measured on SS, TA = 25°C 0.25 0.6 0.8 V SS Charge Current VSS = 2.5V 4 6 10 µA |
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