LinkSwitch-4
ꢀꢁꢂꢃ ꢄꢀꢅ
100ꢀ
ꢉꢊꢋ ꢌꢍꢎꢏꢐ
ꢑꢎꢒꢓ ꢌꢍꢎꢏꢐ
ꢔꢕꢖꢗꢘꢔꢙꢗꢚꢄꢛ
ꢅꢕꢖꢗꢘꢄꢙꢌꢅꢜꢛ
ꢅꢕꢖꢗꢘꢄꢙꢗꢚꢄꢛ
ꢁ5ꢀ
50ꢀ
ꢃꢃꢀ
ꢅꢕꢖꢗꢙꢝꢞꢗꢛ
ꢆꢁꢂꢃ ꢄꢇꢅ
0
100ꢀ
1ꢁ5ꢀ ꢂ00ꢀ
Figure 15. Typical LNK4214D and LNK4215D CP Output Characteristic Achieved.
Constant Power
The LNK4214D controller is optimized for fast start-up into loads with
large capacitance. The constant current (CC) pull-up set point of the
VI characteristic is determined by the value of RCS. The controller
regulates in CC mode until it is above approximately 50% of the
programmed constant voltage (CV) regulation point (set by the values
of RFB1 and RFB2). It then regulates in a power limited or “constant
power” (CP) mode until the output voltage reaches the CV set point,
at which point it changes to CV mode regulation. The exact trajectory
is dependent on the
input mains voltage.
IOUT at the point of transition between CP and CV modes, IOUTCP, will be
greater than 57% of IOUT(EXT) as shown in Figure 15.
13
Rev. F 05/18
www.power.com
POWERINT [ Power Integrations ]
