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參數(shù)資料
| 型號： | EV2363DN-00A |
| 廠商： | Monolithic Power Systems, Inc. |
| 英文描述： | 3A, 27V, 365KHz Step-Down Converter |
| 中文描述： | 第3A，27V的，365KHz降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 9/11頁 |
| 文件大?。?/td> | 363K |
| 代理商： | EV2363DN-00A |
MP2363 – 3A, 27V, 365KHz STEP-DOWN CONVERTER
MP2363 Rev. 1.0
6/15/2006
www.MonolithicPower.com
9
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
To optimize the compensation components for
conditions not listed in Table 2, the following
procedure can be used.
1. Choose the compensation resistor (R3) to set
the desired crossover frequency. Determine the
R3 value by the following equation:
FB
OUT
V
CS
EA
C
V
G
G
f
2
C
×
2
3
R
×
×
×
π
=
Where f
C
is the desired crossover frequency
(which typically has a value no higher than
37.5KHz).
2. Choose the compensation capacitor (C3) to
achieve the desired phase margin. For
applications with typical inductor values, setting
the compensation zero, f
Z1
, below one forth of
the crossover frequency provides sufficient
phase margin. Determine the C3 value by the
following equation:
C
f
3
R
2
4
3
C
×
×
π
>
3. Determine if the second compensation
capacitor (C6) is required. It is required if the
ESR zero of the output capacitor is located at
less than half of the 365KHz switching
frequency, or the following relationship is valid:
2
f
R
2
C
2
1
S
ESR
<
×
×
π
If this is the case, then add the second
compensation capacitor (C6) to set the pole f
P3
at the location of the ESR zero. Determine the
C6 value by the equation:
3
R
R
2
C
6
C
ESR
×
=
Soft-Start Capacitor
To reduce input inrush current during startup, a
programmable
soft-start
connecting a capacitor (C4) from pin SS to
GND. The soft-start time is given by:
is
provided
by
)
F
(
C
45
)
ms
(
t
SS
SS
μ
×
=
To reduce the susceptibility to noise, do not
leave SS pin open. Use a capacitor with small
value if you do not need soft-start function
.
External Bootstrap Diode
It is recommended that an external bootstrap
diode be added when the system has a 5V
fixed input or the power supply generates a 5V
output. This helps improve the efficiency of the
regulator. The bootstrap diode can be a low
cost one such as IN4148 or BAT54.
MP2363
SW
BS
3
1
10nF
5V
DIODE
Figure 2—External Bootstrap Diode
This diode is also recommended for high duty
cycle operation (when
IN
OUT
V
V
>65%) and high
output voltage (V
OUT
>12V) applications.
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| EV2364DF-00A | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:4 Output DSL Power Supply |
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| EV24-0.5-02-44M | 功能描述:共模濾波器/扼流器 44mH 0.5A - VERTICAL COMMN-MODE SPPRESSN RoHS:否 制造商:TDK 電感: 阻抗:35 Ohms 容差: 最大直流電流:0.1 A 最大直流電阻:1.5 Ohms 自諧振頻率: Q 最小值: 工作溫度范圍:- 25 C to + 85 C 端接類型:SMD/SMT 封裝 / 箱體:0302 (0806 metric) 系列:TCE |
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