RDK-239 Power Integrations, Inc., RDK-239 Datasheet - Page 18

• Manufacturer Part Number: RDK-239
• Description: Specifications: Family: Eval Boards - DC/DC & AC/DC (Off-Line) SMPS ; Series: HiperLCS™ ; Main Purpose: DC/DC, Step Down ; Outputs and Type: 1, Isolated ; Power - Output: 150W ; Voltage - Output: 24V ; Current - Output: 6.25A ; Voltage - Input:
• Manufacturer: Power Integrations, Inc.

Figure 26. Zoom in of Last Few Switching Cycles of Burst Pulse Train of Figure 24.
Rev. B 062011
400
200
100
300
18
-5
0
0
The Switching Frequency of the Last Few Cycles is f
This Case (arrow). The Ringing in V
Primary Inductance Ringing with the MOSFET Capacitance.
LCS700-708
Time ( s)
50
HB
After Switching Stops, is the
PI-6470-062811
STOP
, 383 kHz in
100
24.1
24.0
23.9
Higher f
begins, increase the input voltage threshold and decrease the
output ripple in burst mode, but will increase the burst repetition
rate, which may introduce audible noise in some combinations
of line and load. The choice of f
transient response where the HiperLCS goes in and out of burst
mode.
START
will decrease the load threshold at which bursting
START
will affect the large signal
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