L6725_07 STMICROELECTRONICS [STMicroelectronics], L6725_07 Datasheet - Page 12

• Manufacturer Part Number: L6725_07
• Description: Voltage mode PWM controller with bootstrap anti-discharging system
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Device description
5.5
Figure 4.
5.6
Figure 5.
12/32
Error amplifier
Soft start
When both V
the start-up phase takes place. Otherwise the SS pin is internally shorted to GND. At start-up, a
ramp is generated charging the external capacitor C
initial value for this current is 35µA and charges the capacitor up to 0.5V. After that it becomes
10µA until the final charge value of approximately 4V (see
Vss
Error amplifier reference
Soft-Start phase.
CC
and V
IN
are above their turn-ON thresholds (V
0.5V
SS
with an internal current generator. The
Figure
4V
IN
is monitored by the OCH pin)
5.).
1.25V
4.2V
Vcc
Vin
L6725 - L6725A
t
t