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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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L6590A 데이터시트(PDF) 2 Page - STMicroelectronics |
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L6590A 데이터시트(HTML) 2 Page - STMicroelectronics |
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2 / 19 page  L6590A 2/19 DESCRIPTION (continued) The MOSFET is source-grounded, thus it is possible to build flyback, boost and forward converters. The device is meant to work with secondary feed- back for tight tolerance of the regulated output volt- age. The internal fixed oscillator frequency and the inte- grated non dissipative start-up generator minimize the external component count and power consump- tion. The device is equipped with a standby function that automatically reduces the oscillator frequency from 65 to 22 kHz under light load conditions to enhance efficiency (Pin <1W @ Pout = 0.5W with wide range mains). Internal protections like cycle-by-cycle current limit- ing, latched output overvoltage protection, mains un- dervoltage protection and thermal shutdown generate a 'robust' design solution. The IC uses a special leadframe with the ground pins (6, 7 and 8) internally connected in order for heat to be easily removed from the silicon die. An heatsink can then be realized by simply making provision of few cm2 of copper on the PCB. Furthermore, the pin close to the high-voltage one is not connected to ease compliance with safety distances on the PCB. BLOCK DIAGRAM PIN CONNECTIONS (Top view) SUPPLY &UVLO OVER VOLTAGE OVER CURRENT + - + - 2.5V + - DRAIN (1) VCC (3) BOK (5) COMP (4) GND (6,7,8) VREF 1mA BROWNOUT PWM STANDBY START-UP OSC 65/22 kHz THERMAL S.DOWN BOK DRAIN N.C. Vcc COMP GND GND GND |
유사한 부품 번호 - L6590A |
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유사한 설명 - L6590A |
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