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TS2508A bảng dữ liệu(PDF) 3 Page - Taiwan Semiconductor Company, Ltd |
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TS2508A bảng dữ liệu(HTML) 3 Page - Taiwan Semiconductor Company, Ltd |
3 / 8 page TS2508A 3A / 330KHz PWM Buck Converter 3/8 Version: C12 Application Circuit Typical Circuit L1 recommend value (VIN=12V, IOUT=3A ) VOUT 1.8V 2.5V 3.3V 5V L1 Value 18uH 22uH 27uH 33uH Function Descriptions PWM Control The TS2508A consists of DC/DC converters that employ a pulse-width modulation (PWM) system. In converters of the TS2508A, the pulse width varies in a range from 0 to 100%, according to the load current. The ripple voltage produced by the switching can easily be removed through a filter because the switching frequency remains constant. Therefore, these converters provide a low-ripple power over broad ranges of input voltage and load current. RDS(ON) Current Limiting The current limit threshold is setting by the external resistor (R3) connecting from VCC supply to OCSET pin. The internal 110uA sink current crossing the resistor sets the voltage at pin of OCSET. When the PWM voltage is less than the voltage at OCSET, an over-current condition is triggered. Please refer to the formula for setting the minimum current limit value: (Normally, The ISW(MAX) setting more than IOUT 1.2A) Example: ISW=(0.11mA * 2k + 0.08) / 70mΩ = 4.3A – (VIN=12V) ISW=(0.11mA * 3.3k + 0.08) / 1000mΩ = 4.4A – (VIN=5V) |
Số phần tương tự - TS2508A |
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Mô tả tương tự - TS2508A |
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