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UC1902 bảng dữ liệu(PDF) 2 Page - Texas Instruments |
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UC1902 bảng dữ liệu(HTML) 2 Page - Texas Instruments |
2 / 6 page 2 UC1902 UC2902 UC3902 CONNECTION DIAGRAM DIL-8, SOIC-8 (Top View) N, J and D Package ELECTRICAL CHARACTERISTICS: Unless otherwise specified, TA = –55°C to +125°C for UC1902, –40°C to+85°C for UC2902, 0°C to 70°C for UC3902, VCC = 5V, RADJR = 1kΩ, VADJ = 5V, COMP = 5nF capacitor to GND, VSHARE– = 0V, TA = TJ. PARAMETERS TEST CONDITIONS MIN TYP MAX UNIT Power Supply Supply Current SHARE+ = 1V, SENSE = 0V 4 6 mA VCC = 20V 6 10 mA Undervoltage Lockout Startup Voltage SHARE+ = 0.2V, SENSE = 0V, COMP = 1V 2.3 2.5 2.7 V Hysteresis SHARE+ = 0.2V, SENSE = 0V, COMP = 1V 60 100 140 mV Current Sense Amplifier Input Offset Voltage 0.1V ≤ SHARE+ ≤ 1.1V –2.5 –0.5 1.5 mV Gain SENSE to SHARE 0.1V ≤ SHARE+ ≤ 1.1V –41 –40 -39 V/V Input Resistance 0.6 1 1.5 k Ω Share Drive Amplifier SHARE+ High VCC = 2.5V, SENSE = –50mV, ISHARE+ = –1mA 1.2 1.4 V VCC = 12V, SENSE = –250mV, ISHARE+ = –1mA 9.6 10 10.4 V VCC = 20V, SENSE = –250mV, ISHARE+ = –1mA 9.6 10 10.4 V SHARE+ Low VCC = 2.5V, SENSE = +10mV, ISHARE+ = –1mA 20 50 mV VCC = 12V, SENSE = +10mV, ISHARE+ = –1mA 20 50 mV VCC = 20V, SENSE = +10mV, ISHARE+ = –1mA 20 50 mV SHARE+ Output Voltage Measures SHARE+, SENSE = 0mV, RSHARE+ = 200 Ω resistor SHARE+ to GND 20 40 mV CMRR 0 ≤ SHARE– ≤ 1V , SENSE used as input to amplifier 50 90 dB Load Regulation Load on SHARE+, –1mA ≤ ILOAD ≤ –20mA, SENSE = –25mV 020 mV Short Circuit Current SHARE+ = 0V, SENSE = –25mV –85 –50 –20 mA Slew Rate SENSE = +10mV to –90mV Step, 200 Ω resistor SHARE+ to GND 0.16 0.27 0.37 V/ µs SENSE = –90mV to +10mV Step, 200 Ω resistor SHARE+ to GND 0.12 0.24 0.34 V/ µs Supply Voltage (ADJ and VCC) . . . . . . . . . . . . . . –0.3V to 20V SENSE Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . –5V to +5V ADJR, COMP Voltage. . . . . . . . . . . . . . . . . . . . . . –0.3V to +4V SHARE–, SHARE+ Voltages . . . . . . . . . . . . . . . . –0.3V to 10V SHARE+ Current . . . . . . . . . . . . . . . . . . . . . –100mA to +10mA ADJ Current . . . . . . . . . . . . . . . . . . . . . . . . . . . –1mA to +30mA Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C Junction Temperature . . . . . . . . . . . . . . . . . . . –55°C to +150°C Lead Temperature (Soldering, 10sec.) . . . . . . . . . . . . . +300°C All voltages are with respect to pin 1. Currents are positive into, negative out of the specified terminal. Consult Packaging Sec- tion of the Databook for thermal limitations and considerations of packages. ABSOLUTE MAXIMUM RATINGS |
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