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L6563 Datasheet(PDF) 31 Page - STMicroelectronics |
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L6563 Datasheet(HTML) 31 Page - STMicroelectronics |
31 / 39 page L6563 - L6563A Application information 31/39 IC shutdown upon brownout can be easily realized as shown in Figure 46 The scheme on the left is of general use, the one on the right can be used if the bias levels of the multiplier and the RFF·CFF time constant are compatible with the specified brownout level and with the specified holdup time respectively. In Table 6 it is possible to find a summary of all of the above mentioned working conditions that cause the device to stop operating. Figure 46. Brownout protection (master PFC) 6.8 Summary of L6563/A idle states . 10 RUN AC mains L6563 L6563A VFF L6563 L6563A 5 RUN 10 RFF CFF Table 6. Summary of L6563/A idle states Condition Caused or revealed by PWM_LATCH (pin 8) PWM_STOP (pin 9) Typical IC consumption IC behavior UVLO Vcc < 8.7 V Open Open 50 µA Auto-restart Feedback disconnected PFC_OK > 2.5 V Active (high) Open 180 µA Latched Saturated Boost Inductor Vcs > 1.7 V (L6563 only) Active (high) (L6563 only) Open 180 µA (L6563 only) Latched (L6563 only) AC Brownout RUN < 0.52 V Open Active (low) 1.5 mA Auto-restart Standby PFC_OK < 0.2 V Open Open 1.5 mA Auto-restart |
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