SCY99194 Datasheet, PDF (35/40 Pages) ON Semiconductor – Fixed Frequency Current Mode Controller

SCY99194
PROTECTION MODES AND THE LATCH MODE RELEASES
Event
Timer Protection
Next Device Status
Overcurrent
V_ILIM > 0.7 V
Fault timer
Latch
Winding short
V_sense > V_CS(stop)
Immediate reaction
Latch
Low supply
V_CC < V_CC(off)
External OTP, OVP
10 ms timer
55 ms
Latch
Latch
High supply
V_CC > V_CC(ovp)
Internal TSD
Off mode
V_FB < V_OFF
10 ms timer
10 ms timer
600 ms timer
Latch
Device stops, HV start−up
current source stops
Device stops and internal
V_CC is turned off
Release to Normal Operation Mode
Autorecovery – B version
1^st X2 discharge event
V_CC < V_CC(reset)
Autorecovery – B version
1^st X2 discharge event
V_CC < V_CC(reset)
1^st X2 discharge event
V_CC ≥ V_CC(reset)
1^st X2 discharge event
V_CC < V_CC(on)
1^st X2 discharge event
V_CC < V_CC(reset)
(V_CC > V_CC(on)) & TSDb
(V_CC > V_CC(on)) &
( V_FB > V_ON)
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