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UC1584 数据表(PDF) 1 Page - Texas Instruments |
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UC1584 数据表(HTML) 1 Page - Texas Instruments |
1 / 8 page UC1584 UC2584 UC3584 03/99 FEATURES • Practical Operation at Switching Frequencies up to 1MHz • Wide Band Error Amplifier • Undervoltage Lockout with Hysteresis • Output Active Low During UVLO • Soft Start/Maximum Duty Cycle Control • Trimmed Bandgap Reference • Internally Regulated 15V Boost Supply • Short Circuit Protection with Programmable Delay Secondary Side Synchronous Post Regulator DESCRIPTION The UC3584 is a low voltage, Secondary Side Synchronous Post Regula- tor. It is intended to be used for auxiliary output voltage regulation in single secondary winding, multiple output power supplies (for more details refer to the Application Section of this Data sheet). The UC3584 is most suited for systems where the main output is regulated between 5V and 14V. Out- put voltages regulated by the UC3584 can range from virtually 0V up to the output voltage of the main output. Auxiliary output voltage regulation with the UC3584 uses leading edge modulation making it compatible to primary side peak current or voltage mode control. The UC3584 clock circuit is synchronized to the switching frequency utilizing the falling edge of the transformer’s secondary winding waveform. 15 13 14 16 11 9 10 12 SYNC CT RT VREG VCC 220pF 15k Ω 100pF 1k Ω BST2 PGND FB BST1 0.1 µF 1N4148 0.1 µF 10 µF SOLID TANTALUM + 1N4148 33 µH COLTRONICS 470 µF + 2 4 3 1 6 8 7 5 COMP SS CDLY GND SRC OUT VFLT 1.5 µF 120pF 1000pF 0.1 µF 3300pF 20k Ω 30.1k Ω 1500pF 1.33k Ω 24.3k Ω 3.3V AUX 100 Ω 1.5W 0.1 µF 390 µF 33 µH COILTRONICS CSHD 10-45L IRFR024 4.75k Ω 3.57k Ω 3.3 Ω + + + + 7 µH OS-CON 330 µF + 1 µF + 5V MAIN 170kHz PUSH-PULL 2 2 10 10 10BQ040 TYPICAL APPLICATION DIAGRAM. UDG-99062 |
类似零件编号 - UC1584_08 |
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类似说明 - UC1584_08 |
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