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UC1724J Scheda tecnica(PDF) 2 Page - Texas Instruments |
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UC1724J Scheda tecnica(HTML) 2 Page - Texas Instruments |
2 / 5 page 2 UC1724 UC2724 UC3724 CONNECTION DIAGRAMS DIL-8 (Top View) J Or N Package SOIC-16 (Top View) DW Package ELECTRICAL CHARACTERISTICS: Unless otherwise stated, VCC = 20V, RT = 4.3kΩ, CT = 1000pF, no load on any output and these specifications apply for: –55 oC < T A < 125 oC for the UC1724, –25oC < T A < 85 oC for the UC2724, and 0 oC < TA < 70oC for the UC3724. T A=TJ. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Under-Voltage Lockout Start-Up Threshold VIN Rising 7.75 9.5 V Threshold Hysteresis 0.4 1.0 1.5 V Retriggerable One-Shot Initial Accuracy TJ = 25°C 1.54 1.9 2.25 µs Temperature Stability Over Operating TJ 1.0 2.9 µs Voltage Stability VIN = 10 to 35V 0.2 0.5 %/V Operating Frequency LLOAD = 1.4mH 100 150 200 kHz Minimum Pulse Width RT = 2k CT = 300pF 100 500 1200 ns Operating Frequency RT = 2k CT = 300pF LLOAD = 1.4mH 500 750 1100 kHz ABSOLUTE MAXIMUM RATINGS Supply Voltage VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V Source/Sink Current (Pulsed) . . . . . . . . . . . . . . . . . . . . . . . . 1A Source/Sink Current (Continuous) . . . . . . . . . . . . . . . . . . . 0.5A Ouput Voltage (Pins 4, 6). . . . . . . . . . . . . . . –0.3 to (VIN +0.3)V PHI, RT, and CT inputs (Pins 1, 7, and 8) . . . . . . . . . –0.3 to 6V Operating Junction Temperature (Note 2) . . . . . . . . . . . . 150°C Storage Temperature Range . . . . . . . . . . . . . . –65°C to 150°C Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . 300°C Note 1: All voltages are with respect to GND (Pin 2); all cur- rents are positive into, negative out of part. Note 2: Consult Unitrode Integrated Circuit Databook for ther- mal limitations and considerations of package. Note 3: Pin numbers refer to DIL-8 packages. RECOMMENDED OPERATION CONDITIONS Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +9V to +35V Sink/Source Load Current (each output) . . . . . . . . . 0 to 500mA Timing Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . 2kW to 10kW Timing Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . 300pF to 3nF Operating Temperature Range (UC1724) . . . –55°C<TA<125°C Operating Temperature Range (UC3724) . . . . . . 0°C<TA<70°C Note 4: Range over which the device is functional and parameter limits are guaranteed. TEMPERATURE RANGE PACKAGE UC1724J –55°C to +125°C CDIP UC2724DW –25°C to +85°C SOIC-Wide UC2724N PDIP UC3724DW 0°C to +70°C SOIC-Wide UC3724N PDIP ORDERING INFORMATION |
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