RDK-239 Power Integrations, Inc., RDK-239 Datasheet - Page 22

• 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.

Rev. B 062011
NOTES:
A. Guaranteed by design.
B. Typical apparent dead-time at the HB pin under resonant ZVS conditions.
C. VCC/VCCH operating range to achieve power capabilities specified in data sheet power table.
LLC Oscillator (cont.)
I
Hysteresis
DT/BF Voltage to
Program Burst Setting
Time Constant for the
Combination of R
R
ling Cap on DT/BF
FB Current Maximum
FB Control
Current Range
FB Virtual Voltage
FB Input Resistance
FB Input Resistance
During Soft-Start
Over-Current Protection
Fast Over-Current
Fault Voltage
Threshold
Slow Over-Current
Fault Voltage
Threshold
Over-Current Fault
Pulse Width
Over-Temperature Protection
Over-Temperature
Shutdown Threshold
FB
BURST
22
Threshold
Parameter
and the Decoup-
LCS700-708
4
FMAX
A
,
Symbol
I
BURST(HYST)
RC
R
R
V
V
V
V
V
T
V
FB(SS)
I
I
IN(FB)
t
IS(F)
IS(S)
BT1
BT2
BT3
FB
FB
DT/BF
FB
IS
OT
Required V
Required V
Required V
This time constant must be less than the
V
FB input appears as R
FB input appears as R
FB input appears as R
Minimum time V
REF
I
specified maximum to ensure correct
FB
when OV/UV < V
SOURCE = 0 V; T
Determines the maximum control
frequency that can be set by I
is limited by the current into DT/BF
during the soft-start delay interval or
cycle to trigger fault protection
(Unless Otherwise Specified)
7 LLC clock cycle debounce
I
START
V
setting of burst mode.
V
V
CC
DT/BF
DT/BF
DT/BF
FB
FB
is I
. 30 mA < I
. 30 mA < I
= 12 V, V
Conditions
BURST(HYST)
setting BT1
setting BT2
setting BT3
at start-up to enable burst
at start-up to enable burst
at start-up to enable burst
IS
exceeds V
SD
CCH
J
or OV/UV > V
FB
FB
FB(SS)
IN(FB)
IN(FB)
= 0 to 100 °C
below I
< I
< I
= 12 V
in series with
in series with
in series with
DT/BF
DT/BF
IS(F)
STOP
/V
IS(S)
FB
.
OV
per
0.855
0.455
93.5
88.5
83.5
Min
15
5
0.905
0.505
6.25
0.65
Typ
100
750
140
2.5
95
90
85
30
0.955
0.555
Max
96.3
91.3
86.3
100
430
8
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% of I
% of V
%I
Units
kW
mA
°C
ms
ns
W
V
V
V
DT/BF
DT/BF
REF