MP24875 MPS, MP24875 Datasheet - Page 11

• Manufacturer Part Number: MP24875
• Description: 200khz, 55v Input, 1.5a High Power Led Driver
• Manufacturer: MPS

3. Determine if the second compensation
capacitor (C
from COMP pin to GND. It is required if the ESR
zero of the output capacitor is located at less
than half of the switching frequency:
If this is the case, then add the second
compensation capacitor (C
f
C
External Bootstrap Diode
An external bootstrap diode may enhance the
efficiency of the regulator. In below cases, an
MP24875 Rev. 1.0
9/21/2010
P3
COM2
at the location of the ESR zero. Determine the
value by the equation:
COM2
2
C
π ×
COM2
) is required, which is connected
C
OUT
=
1
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C
×
OUT
R
R
ESR
COM2
COM
×
R
<
ESR
) to set the pole
f
2
S
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MP24875 – 1.5A, 200kHz, 55V HIGH-POWER LEDS DRIVER
www.MonolithicPower.com
external BST diode is recommended from the 5V
to BST pin:
The bootstrap diode can be a low cost one such
as IN4148 or BAT54.
There is a 5V rail available in the system;
VIN is not greater than 5V;
VOUT is between 3.3V and 5V;
Figure 2—External Bootstrap Diode
MP24875
11