MP2492 MPS, MP2492 Datasheet - Page 9

• Manufacturer Part Number: MP2492
• Description: 2a, 55v, 100khz Step-down Converter With Programmable Output Current Limit
• Manufacturer: MPS

Output Current Sensing
The output current can be sensed through the
DC resistance (DCR) of the inductor, as shown
in Figure 3a.
For more accurate sensing, use a more
accurate sense resistor.
In Figure 3a, the output current limit is set as:
Where DCR is the DC resistance of the inductor
winding.
In Figure 3a, it is desirable to keep
For more accurate sensing, use a more
accurate sense resistor.
In Figure 3b, the output current limit is set as:
MP2492 Rev. 1.0
12/20/2010
Figure 3—Current Sensing Methods
I
O U T
C
=
S
I
×
O U T
1 0 0 m V
R a
D C R
R a
=
×
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
+
1 0 0 m V
MP2492 – 2A, 55V, 100kHz WITH PROGRAMMABLE OUTPUT CURRENT LIMIT
R b
R b
R
×
S E N S E
=
2 R a
D C R
R b
L 1
+
R b
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