L6566A View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L6566A' PDF : 52 Pages View PDF
Table 6. L6566A protection (continued)
Protection
Description
Caused by
IC
behavior
Vcc
restart
IC Iq VREF
SS
VCOMP OSC
FMOD
VFF
(V) (mA) (V)
(V)
(V)
Externally
settable
overtemperature
VDIS>VOTP
Latched
13.5 0.33
0
0
0
0
0
0
OTP
protection
Internal thermal
shutdown
Tj > 160 oC
Auto
restart(5)
5
0.33
0
0
0
0
0
0
Mains
Brownout
undervoltage VAC_OK < Vth Auto restart
5
0.33
0
0
protection
0
0
0
Unchanged
Reference drift
VREF drift
protection
VREF > Vov
Latched
13.5 0.33
0
0
0
0
0
0
Shutdown1
Gate driver
disable
VFF > Voff Auto restart
5
2.5
5 Unchanged Unchanged 1 Unchanged Unchanged
Shutdown2
Shutdown by
VCOMP low
VCOMP <
VCOMPOFF
Latched
10
0.33
0
0
0
0
0
0
Shutdown by Vcc
going
Vcc < 9.4 V
(VCOMP >
Adaptive UVLO below Vccoff
VCOMPL)
Auto restart 5V
0.18
0
0
0
0
0
0
(lowering of
Vcc < 7.2 V
Vccoff threshold
(VCOMP >
at light load)
VCOMPO)
1. Use One external diode from VFF (#15) to AC_OK (#16), cathode to AC_OK2
2. Use one external diode from SS (#14) to VREF (#10), cathode to VREF
3. If Css and the Vcc capacitor are such that Vcc falls below UVLO before latch tripping (Figure 21 on page 33)
4. If Css and the Vcc capacitor are such that the latch is tripped before Vcc falls below UVLO (Figure 21 on page 33)
5. When TJ < 110 oC
6. Discharged to zero by Vcc going below UVLO
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