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SPMS | Page 18 of 32 |
dependent operation level(Mlevel: between 60 and 100 V), the internal ‘Mlevel switch’ willbe opened and the
The ‘soft start’ switch is closed whenthe V CC reachesa level of 7 V and the ‘soft start’ capacitorC SS (C2522, betweenpin 5 and the sense resistor R3526), is charged to 0.5 V. Once the V CC capacitoris charged to the
During
Figure:
The moment that the voltage on pin 1 drops below the ‘under voltagelock out‘ level (UVLO = ± 9 V), the ICwill stop switching and will enter a safe restart from the rectifiedmains voltage.
7/8/2004