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UC1525BN Scheda tecnica(PDF) 4 Page - Texas Instruments |
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UC1525BN Scheda tecnica(HTML) 4 Page - Texas Instruments |
4 / 14 page 4 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 Output Drivers (Each Output) (VC = 20V) (cont.) Rise Time (Note 2) CL = 1nF, TJ = 25°C 100 600 100 600 ns Fall Time (Note 2) CL = 1nF, TJ = 25°C 50 300 50 300 ns Cross conduction charge Per cycle, TJ = 25°C 30 30 nc Total Standby Current Supply Current VIN = 35V 14 20 14 20 mA Note 2: Ensured by design. Not 100% tested in production. Note 3: Tested at fosc= 40kHz (RT = 3.6K W,CT = 0.01mF, RD =0W). Approximate oscillator frequency is defined by: () f CR R TT D = •• + 1 07 3 . UDG-95056 UDG-95057 PRINCIPLES OF OPERATION AND TYPICAL CHARACTERISTICS UC1525B Output Circuit (1/2 Circuit Shown) UC1525B Output Saturation Characteristics For single-ended supplies, the driver outputs are grounded. The VC terminal is switched to ground by the to- tem-pole source transistors on alternate oscillator cycles. In conventional push-pull bipolar designs, forward base drive is controlled by R1-R3. Rapid turn-off times for the power devices are achieved with speed-up capacitors C, and C2. UDG-95059 UDG-95058 |
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