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TS19377 bảng dữ liệu(PDF) 4 Page - Taiwan Semiconductor Company, Ltd |
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TS19377 bảng dữ liệu(HTML) 4 Page - Taiwan Semiconductor Company, Ltd |
4 / 7 page TS19377 2A Buck (Step-down) WLED Driver 4/7 Version: A11 Function Descriptions PWM Control The TS19377 consists of DC/DC converters that employ a pulse-width modulation (PWM) system. In converters of the TS19377, 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. Setting ILED Current Application circuit item shows the basic application circuit with TS19377 adjustable output version. The external resistor sets the LED output current according to the following formula: ILED=(0.25V/R2) Resistor select for LED output current setting ILED R2 350mA 0.715 87.5mW 750mA 0.333 189mW 1000mA 0.250 250mW RDS(ON) Current Liming The current limit threshold is setting by the internal circuit. Compensation Please refer the table of application circuit. For DC input, the option circuit for compensation is connecting R4 and a 1N4148 diode to VOUT. In order to protect short circuit and thermal shutdown release for LED. |
Số phần tương tự - TS19377 |
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Mô tả tương tự - TS19377 |
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