Design Guide
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V 1.0
2018-06-06
XDPL8218 design guide
For high power factor flyback converter with constant voltage output
Debugging guide
Figure 27
Scenario II waveform example (protection with latch-mode reaction)
Scenario III: V
CC
hits V
CC
turn-off threshold (6 V typ.) and followed by GD pin signal switching restarts after every
V
CC
recharge to V
CC
turn-on threshold (20.5 V typ.). See an example in
This scenario means the V
CC
Under Voltage Lockout (UVLO) protection has been triggered, which is likely caused
by either one of the following:
−
Issue(s) with V
CC
supply circuit or/and start-up related parameter.
−
Debug mode enabled, plus any protection triggering. For more details on the XDPL8218 debug mode,
please refer
Section 19.2
Figure 28
Scenario III waveform example (V
CC
UVLO protection)
