L6726A_07 STMICROELECTRONICS [STMicroelectronics], L6726A_07 Datasheet - Page 14

• Manufacturer Part Number: L6726A_07
• Description: Single phase PWM controller
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Protections
7.3
14/24
Figure 6.
Under voltage lock out
In order to avoid anomalous behaviors of the device when the supply voltage is too low to
support its internal rails, UVLO is provided: the device will start up when VCC reaches
UVLO upper threshold and will shutdown when VCC drops below UVLO lower threshold.
The 4.1V maximum UVLO upper threshold allows L6726A to be supplied from 5V and 12V
busses in or-ing diode configuration.
Figure 7.
bottom edge
Enable Th
PWM ramp
UVLO Th
700mV
LGATE
COMP
VCC
OC threshold setting procedure timings (top) and waveforms (bottom)
OCP trip, default threshold, LS: STD38NH02L (left). UVLO turn off (right)
Setting Procedure
R
5.5ms - 6.5ms
OCSET
connected
t
DELAY
bottom edge
Enable Th
PWM ramp
UVLO Th
700mV
Setting Procedure
LGATE
VCC
COMP
R
OCSET
not connected
t
DELAY
L6726A