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參數(shù)資料
| 型號： | BP5250 |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | 25 AMP MINIATURE POWER RELAY |
| 中文描述： | 直流/直流轉換器 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大小： | 118K |
| 代理商： | BP5250 |
BP5250 / BP5250-24
(2) When the load current is increased.
It is possible by arrangement in a parallel connecting
Q1, 2 and SD1,2
Fig.5
Vout
R2
Vin
R1
L1
R3
C3
C4
Q1
SD1,2
C2
C1
V
CTL
1
Vi
2
SW
3
GND
4
IS
5
Vo
6
V
ADJ
7
BP5250 / BP5250-24
Q2
· When Q1 and Q2 are connected parallel, use of a
device with small gate capacity is recommended.
Large gate capacity reduces the switching speed,
which may cause a larger FET loss, exceeding
the allowable loss value.
· When 2SJ529S is connected parallel, the rated load
current 3A is the maximum atVi=12V,Vo=5V
(3) When the power saving function is used.
The output is off when the V
CTL
pin is set to the
Low or high-impedance.
Fig.6
Vout
R2
Vin
R1
L1
R3
C3
C4
SW
Q1
SD1
C2
C1
V
CTL
1
Vi
2
SW
3
GND
4
IS
5
Vo
6
V
ADJ
7
BP5250 / BP5250-24
Application example
(1) Application circuit example is shown in the Fig.4.
Application
Input voltage 12V
Output current 2A
Output voltage 5V
Q1 : 2SJ529S/Hitachi
SD : RB050L-40/ROHM
L1 : CDRH124-220L/Sumida
C1 : 680
μ
F/25V
(ZL series)
/Rubycon
C2 : 680
μ
F/10V
(ZL series)
/Rubycon
C3 : 0.1
μ
F/16V
C4 : 0.1
μ
F/25V
· There is a posibility that the C1 exceeds the allowable ripple current. Note the allowable ripple
current of the capacitor to be used.
· R2+R3
≤
55K
is recommended for R2,3 to make the most of output voltage accuracy.
· Output voltage range is limited by input voltage. Please refer to the Fig.8.
Fig.4
R1 : Over-current detection resistance R1=0.068/I
(0.068V : offset voltage)
Overcurrent protection characteristic
at R1=27m
is shown below.
R2, R3 : Outpur voltage
establishment resistance
Vo=VADJ
×
(1+R3/R2)
(R2+R3
≤
55k
)
Establishment example
R2(
)
Vo(V)
R3(
)
8.0
5.0
3.3
2.5
1.5
3.3k
10k
20k
10k
10k
18k
30k
33k
10k
2k
Output current [mA]
BPcharacteristic (Vin=12V)
O
6.0
5.0
4.0
3.0
2.0
1.0
00
500
1000
1500
2000
I
2500
Vout
R2
Vin
R1
27m
L1
22
μ
H
R3 : 30k
C3
C4
Q1
SD1
C2
μ
F/16V
C1
μ
F/25V
V
CTL
1
Vi
2
SW
3
GND
4
IS
5
Vo
6
V
ADJ
7
BP5250 / BP5250-24
4/11
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| BP5250-24 | 功能描述:電壓監(jiān)測器/監(jiān)控器 DC/DC 24V RoHS:否 制造商:Texas Instruments 監(jiān)測電壓數(shù):2 監(jiān)測電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過電壓閾值: 準確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風格:SMD/SMT |
| BP5255BR00SP | 制造商:POWGG 功能描述: |
| BP5275-18 | 功能描述:直流/直流開關轉換器 3Term Step Dwn DC/DC Cnvrtr Non-Iso 1.8V RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| BP5275-25 | 功能描述:直流/直流開關轉換器 3Term Step Dwn DC/DC Cnvrtr Non-Iso 2.5V RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| BP5275-33 | 功能描述:直流/直流開關轉換器 3Term Step Dwn DC/DC Cnvrtr Non-Iso 3.3V RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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