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MCZ5303SG Arkusz danych(PDF) 11 Page - Shindengen Electric Mfg.Co.Ltd |
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MCZ5303SG Arkusz danych(HTML) 11 Page - Shindengen Electric Mfg.Co.Ltd |
11 / 27 page Confidential MCZ5303SG, MCZ5303SH Application Manual Vol. 1.0 5RE-125294-2 – 11 – 4-10. Vw Terminal (pin13) The Vw terminal inputs voltage in which output from the Vcc winding is rectified. The maximum input voltage of the Vw terminal is 35V. It is connected from the Vw terminal to the Vcc terminal with an 18.5V dropper circuit and a Vw switch. When oscillation of the LLC is started and the Vw terminal voltage is increased to (Vcc+1V) or more at the time of start, the start circuit stops. When the Vw terminal voltage decreases to 7.5V or below, the start circuit starts operation. Since the maximum allowable current of the Vw terminal is 200mA, the current should be limited with resistance, etc., in consideration of charging to Cvcc when the KVc1 SW is on. VW terminal input threshold voltage Operation (Vcc+1V) or more Start circuit stop 7.5V or less Start circuit operation start 4-11. Vin Terminal (pin16) The Vin terminal is a terminal to supply a current from the rectified high voltage part to Vcc at the time of power supply start and consists of a high withstand voltage switch and a constant current circuit. The supply current is 14.5mA with Vin=100VDC. When Vcc is 1V, it is reduced to 2.7mA. Operation of the high withstand voltage switch is controlled by the above-mentioned VW terminal. When the high withstand voltage switch is turned on at the time of start, charging to the Vcc terminal capacitor is started and continued until the Vcc terminal voltage is clamped to 17V. The high withstand voltage switch is turned off when the LLC converter oscillates and the voltage of the Vw terminal becomes Vcc+1V or more with supply from the primary Vcc winding. Figure 9 is a start/stop sequence drawing in burst mode. Figure 9. Start/stop sequence drawing in burst mode (MCZ5303SG) |
Podobny numer części - MCZ5303SG |
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Podobny opis - MCZ5303SG |
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