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UC1525B Scheda tecnica(PDF) 3 Page - Texas Instruments |
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UC1525B Scheda tecnica(HTML) 3 Page - Texas Instruments |
3 / 14 page 3 UC1525B UC1527B UC2525B UC2527B UC3525B UC3527B ELECTRICAL CHARACTERISTICS:Unless otherwise stated, these specifications apply for TA = –55°C to +125°C for the UC1525B and UC1527B; –40°C to +85°C for the UC2525B and UC2527B; 0°C to +70°C for the UC3525B and UC3527B; +VIN = 20V, TA =TJ. PARAMETER TEST CONDITIONS UC1525B/UC2525B UC1527B/UC2527B UC3525B UC3527B MIN TYP MAX MIN TYP MAX UNITS Oscillator Section (Note 3) Initial Accuracy (Notes2&3) TJ = 25°C ±2 ±6 ±2 ±6 % Voltage Stability (Notes2&3) VIN =8Vto35V ±0.3 ±1 ±1 ±2 % Temperature Stability (Note 2) Over Operating Range ±3 ±6 ±3 ±6 % Minimum Frequency RT = 200k W,CT=0.1mF 120 120 Hz Maximum Frequency RT = 2k W, CT = 470pF 400 400 kHz Current Mirror IRT = 2mA 1.7 2.0 2.2 1.7 2.0 2.2 mA Clock Amplitude (Notes2&3) 3.0 3.5 3.0 3.5 V Clock Width (Notes2&3) TJ = 25°C 0.3 0.5 1.0 0.3 0.5 1.0 ms Sync Threshold 1.2 2.0 2.8 1.2 2.0 2.8 V Sync Input Current Sync Voltage = 3.5V 1.0 2.5 1.0 2.5 mA Error Amplifier Section (VCM = 5.1V) Input Offset Voltage 0.5 5 2 10 mV Input Bias Current 1 10 1 10 mA Input Offset Current 1 1 mA DC Open Loop Gain RL ³ 10 MegW 60 75 60 75 dB Gain-Bandwidth Product (Note 2) AV = 0dB, TJ = 25°C 1 2 1 2 MHz Output Low Level 0.2 0.5 0.2 0.5 V Output High Level 3.8 5.6 3.8 5.6 V Common Mode Rejection VCM = 1.5V to 5.2V 60 75 60 75 dB Supply Voltage Rejection VIN = 8V to 35V 50 60 50 60 dB PWM Comparator Minimum Duty Cycle 0 0 % Maximum Duty Cycle (Note 3) 45 49 45 49 % Input Threshold (Note 3) Zero Duty Cycle 0.7 0.9 0.7 0.9 V Input Threshold (Note 3) Maximum Duty Cycle 3.3 3.6 3.3 3.6 V Input Bias Current (Note 2) 0.05 1.0 0.05 1.0 mA Shutdown Section Soft Start Current VSHUTDOWN = 0V, VSOFTSTART =0V 25 50 80 25 50 80 mA Soft Start Low Level VSHUTDOWN = 2.5V 0.4 0.7 0.4 0.7 V Shutdown Threshold To outputs, VSOFTSTART = 5.1V, TJ =25°C 0.6 0.8 1.0 0.6 0.8 1.0 V Shutdown Input Current VSHUTDOWN = 2.5V 0.4 1.0 0.4 1.0 mA Shutdown Delay (Note 2) VSHUTDOWN = 2.5V, TJ = 25°C 0.2 0.5 0.2 0.5 ms Output Drivers (Each Output) (Vc = 20V) Output Low Level ISINK = 20mA 0.2 0.4 0.2 0.4 V ISINK = 100mA 1.0 2.0 1.0 2.0 V Output HIgh Level ISOURCE = 20mA 18 19 18 19 V ISOURCE = 100mA 17 18 17 18 V Undervoltage Lockout VCOMP and VSOFTSTART = High 6 7 8 678 V Collector Leakage VC = 35V 200 200 mA |
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