LB11868V

No.A1915-9/11

Control timing chart

(Soft start)

(1)At VTH < RMI voltage

(2) At VTH > RMI voltage

Adjust the S-S pin voltage gradient by means of the capacitance of the capacitor between the S-S pin and REG..

Recommended capacitor: 0.1

μ to 1μF

GND

VCPWMH

VCPWML

CPWM

0%

100%

ONDUTY

T

RMI voltage

VTH voltage

S-S voltage

Lock protection

Soft start section

VTH set speed

GND

VCPWMH

VCPWML

CPWM

0%

100%

ONDUTY

T

VTH voltage

RMI voltage

S-S voltage

Lock protection

Soft

start

section

RMI set speed