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UC3525ANG4 データシート(PDF) 2 Page - Texas Instruments |
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UC3525ANG4 データシート(HTML) 2 Page - Texas Instruments |
2 / 17 page www.ti.com DESCRIPTION (continued) ABSOLUTE MAXIMUM RATINGS (1) RECOMMENDED OPERATING CONDITIONS (1) UC1525A, UC1527A UC2525A, UC2527A UC3525A, UC3527A SLUS191C – FEBRUARY 1997 – REVISED JANUARY 2008 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. These functions are also controlled by an undervoltage lockout which keeps the outputs off and the soft-start capacitor discharged for sub-normal input voltages. This lockout circuitry includes approximately 500 mV of hysteresis for jitter- free operation. Another feature of these PWM circuits is a latch following the comparator. Once a PWM pulse has been terminated for any reason, the outputs will remain off for the duration of the period. The latch is reset with each clock pulse. The output stages are totem-pole designs capable of sourcing or sinking in excess of 200 mA. The UC1525A output stage features NOR logic, giving a LOW output for an OFF state. The UC1527A utilizes OR logic which results in a HIGH output level when OFF. UCx52xA UNIT +VIN Supply voltage 40 VC Collector supply voltage 40 V Logic inputs –0.3 to +5.5 Analog inputs –0.3 to +VIN Output current, source or sink 500 Reference output current 50 mA Oscillator charging current 5 Power dissipation at TA = +25°C (2) 1000 mW Power dissipation at TC = +25°C (2) 2000 Operating junction temperature –55 to 150 Storage temperature range –65 to 150 °C Lead temperature (soldering, 10 seconds) 300 (1) Values beyond which damage may occur. (2) See Thermal Characteristics table. MIN MAX UNIT +VIN Input voltage 8 35 V VC Collector supply voltage 4.5 35 Sink/source load current (steady state) 0 100 Sink/source load current (peak) 0 400 mA Reference load current 0 20 Oscillator frequency range 100 400 Hz Oscillator timing resistor 2 150 k Ω Oscillator timing capacitorm 0.001 0.01 µF Dead time resistor range 0 500 Ω UC1525A, UC1527A –55 125 Operating ambient temperature range UC2525A, UC2527A –25 85 °C UC3525A, UC3527A 0 70 (1) Range over which the device is functional and parameter limits are assured. 2 Submit Documentation Feedback Copyright © 1997–2008, Texas Instruments Incorporated Product Folder Link(s): UC1525A, UC1527A UC2525A, UC2527A UC3525A, UC3527A |
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同様の説明 - UC3525ANG4 |
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