Datasheet

LV5026MC
No.A2042-12/16
3. OVP (Over voltage protection)
If the voltage of V
IN
pin is higher than the internal reference voltage V
IN
OVP (27V typ), switching operation is
stopped.
The stopping operation is kept until the voltage of V
IN
is lower than 7.3V. If the voltage of V
IN
pin is higher than 9V,
the switching operation is restated.
4. TSD (Thermal shut down protection)
The thermal shutdown function works when the junction temperature of IC is 165°C (typ) ( A ), and the IC switching
stops. The IC starts switching operation again when the junction temperature is 135°C typ ( B ) or lower.
Skip frequency function
LV5026MC contains the skip frequency function for reduction of the peak value of conduction noise. This function
changes the frequency as follows.
Switching frequency is changed as follows.
… ×0.9 → ×1.1 → ×1.05 → ×1 → ×0.95 → ×0.9 → ×1.1 …
It’s repeated by this loop.
V
IN
voltage
Operation start
OVP reset
OVP
Time
Time
9V typ
7.3V typ
27V typ
on
C
A
B
onoff
Outputstage
Time
Time
TSD (design target)
165°C
135°C
A
B
on onoff
Outputstage
Tj
(Junction tmperature)
UVLO unlocked
V
IN
OUT
45k 45k50k55k 52.5k 47.5k
Skip frequency function