DPA426 Power Integrations, DPA426 Datasheet - Page 10

• Manufacturer Part Number: DPA426
• Description: (DPA423 - DPA426) Highly Integrated DC-DC Converter ICs for Distributed Power Architectures
• Manufacturer: Power Integrations

shows several different ways of using this pin. See Figure 7 for
a description of the functions where the horizontal axis (left
hand side) represents the EXTERNAL CURRENT LIMIT pin
current. The meaning of the vertical axes varies with function.
For those that control the on/off states of the output such as
remote ON/OFF, the vertical axis represents the enable/disable
Figure 7. LINE-SENSE and EXTERNAL CURRENT LIMIT Pin Characteristics.
10
DPA423-426
X Pin Voltage
Switching
MOSFET
Current
Note: These figures provide idealized functional characteristics with typical performance values. Please refer to the
Output
Limit
K
1/04
parametric table and typical performance characteristics sections of the data sheet for measured data.
-250
(Enabled)
(Disabled)
I
LIMIT
X Pin Current (µA)
-200
(Default)
-150
V
BG
-100
-25.5 µA
-21.5 µA
-50
I
REM(U)
0
L Pin Voltage
states of the output. For external current limit, the vertical axis
represents the magnitude of the I
Typical Performance Characteristics section for the current
limit programming range and the selection of the appropriate
resistor value.
Duty Cycle
Switching
Maximum
MOSFET
Output
0
I
UV(U)
L Pin Current (µA)
50
(Enabled)
(Disabled)
47 µA
100
I
OV(U)
150
LIMIT
V
DC
BG
131 µA
. Please see graphs in the
135 µA
+ V
MAX
200
TP
(75%)
250
PI-2778-080801