L6566BH View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L6566BH' PDF : 51 Pages View PDF
Table 5. L6566BH light load management features
Feature
Description
Caused by
IC
VCC_restart Consump. VREF
SS
behavior
(V)
(Iqdis,mA) (V)
VCOMP
(V)
OSC
FMOD
(V)
Burst
mode
Controlled ON-OFF
operation for low power
consumption at light load
VCOMP <
Pulse skipping
VCOMPBM - Hys
operation
N.A.
1.34 mA
5
Unchanged
VCOMPBM-HYS to
VCOMPBM
0/1
0
Table 6. L6566BH protection
Protection
Description
Caused by
IC
Vcc
restart
IC Iq
VREF
SS
behavior (V) (mA) (V)
VCOMP OSC
(V)
(V)
OVP
Output overvoltage
protection
VZCD>VZCDth for 4 Auto
consecutive
switching cycles
restart(1)
5
2.2
5(6)
Unchanged
(6)
0
0
VFF > VFFlatch Latched 13.5 0.33 0
0
0
0
OLP
Output overload
protection
Short-
circuit
protection
Output short-circuit
protection
Transformer saturation
2nd OCP or shorted secondary
diode protection
VCOMP =VCOMPHi
VSS > VSSDIS
VCOMP =VCOMPHi
VSS > VSSLAT
VCOMP =VCOMPHi
VSS > VSSDIS(4)
VCOMP =VCOMPHi
VSS > VSSLAT(6)
VCS > VCSDIS
for 2-3
consecutive
switching cycles
Auto
restart(2)
Latched
Auto
restart
Latched
Latched
5
13.5
5
13.5
5
1.46 5(6)
0.33 0
1.46 0
0.33 0
0.33 0
VSS
<VSSLAT(3)
VCOMPHi (6)
0
0
0
0
VSS
<VSSLAT(6)
VCOMPHi(5)
0
0
0
0
0
0
FMOD
0
0
0
0
0
0
0
VFF
Unchanged
0
Unchanged
0
Unchanged
0
0
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