- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄224390 > MP2482DN (MONOLITHIC POWER SYSTEMS INC) 9 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 PDF資料下載
參數(shù)資料
| 型號： | MP2482DN |
| 廠商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 9 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MS-012BA, SOIC-8 |
| 文件頁數(shù)： | 10/11頁 |
| 文件大小： | 350K |
| 代理商： | MP2482DN |
MP2482 – 5A, 30V, 420KHZ STEP-DOWN CONVERTER
MP2482 Rev.1.2
www.MonolithicPower.com
8
10/22/2009
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2009 MPS. All Rights Reserved.
APPLICATION INFORMATION
The schematic on the front page shows a typical
MP2482 application. The IC can provide up to 5A
output current at a nominal output voltage of 3.3V.
For proper thermal performance, the exposed pad
of the device must be soldered down to the
printed circuit board.
Setting the Output Voltage
The external resistor divider is used to set the
output voltage (see the schematic on front page).
The feedback resistor R1 also sets the feedback
loop bandwidth with the internal compensation
capacitor (see Figure 1). Choose R1 to be
around 40.2k for optimal transient response. R2
is then given by:
1
V
8
.
0
V
1
R
2
R
OUT
=
Table 1—Resistor Selection for Common
Output Voltages
VOUT (V)
R1 (k)
R2 (k)
1.8
40.2 (1%)
32.4 (1%)
2.5
40.2 (1%)
19.1 (1%)
3.3
40.2 (1%)
13 (1%)
5
40.2 (1%)
7.68 (1%)
Selecting the Inductor
A 1H to 10H inductor with a DC current rating
of at least 25% percent higher than the maximum
load
current
is
recommended
for
most
applications. For highest efficiency, the inductor
DC resistance should be less than 15m. For
most designs, the inductance value can be
derived from the following equation.
OSC
L
IN
OUT
IN
OUT
f
I
V
)
V
(
V
L
×
Δ
×
×
=
Where ΔIL is the inductor ripple current.
Choose inductor current to be approximately
30% of the maximum load current, 5A. The
maximum inductor peak current is:
2
I
L
LOAD
)
MAX
(
L
Δ
+
=
Under light load conditions below 100mA, larger
inductance is recommended for improved efficiency.
Output Rectifier Diode
The output rectifier diode supplies the current to
the inductor when the high-side switch is off. To
reduce losses due to the diode forward voltage
and recovery times, use a Schottky diode.
Choose a diode whose maximum reverse voltage
rating is greater than the maximum input voltage,
and whose current rating is greater than the
maximum load current. Table 2 lists example
Schottky diodes and manufacturers.
Table 2—Diode Selection Guide
Diode
Voltage/Current
Rating
Manufacture
B530C
30V, 5A
Diodes Inc.
MBRD630CT
30V, 6A
On Semi
Selecting the Input Capacitor
The input capacitor (C1) reduces the surge
current drawn from the input and the switching
noise from the device. The input capacitor
impedance at the switching frequency should be
less than the input source impedance to prevent
high frequency switching current from passing to
the input. Ceramic capacitors with X5R or X7R
dielectrics are highly recommended because of
their low ESR and small temperature coefficients.
For 5A output applications, a 22F capacitor is
sufficient.
Selecting the Output Capacitor
The output capacitor (C2) keeps output voltage
small and ensures regulation loop stability. The
output capacitor impedance should be low at the
switching frequency. Ceramic capacitors with
X5R or X7R dielectrics are recommended.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MP5010GN | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.22 V, PBCY2 |
| MP6-6131022R | 10 CONTACT(S), FEMALE, STRAIGHT TWO PART BOARD CONNECTOR, SURFACE MOUNT |
| MP6-6131522R | 15 CONTACT(S), FEMALE, STRAIGHT TWO PART BOARD CONNECTOR, SURFACE MOUNT |
| MP6-6132022R | 20 CONTACT(S), FEMALE, STRAIGHT TWO PART BOARD CONNECTOR, SURFACE MOUNT |
| MP6-6132522R | 25 CONTACT(S), FEMALE, STRAIGHT TWO PART BOARD CONNECTOR, SURFACE MOUNT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MP2482DN-LF | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 6A 30V 420kHz Nonsync Step-Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP2482DN-LF-Z | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 6A 30V 420kHz Nonsync Step-Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP24830HS-LF | 功能描述:LED照明驅(qū)動器 LED driver for TV LED backlight RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| MP24830HS-LF-Z | 制造商:Monolithic Power Systems 功能描述:BUCK BOOST POWER LEVERAGE LED DRIVER FOR TV LED BACKLIGHT - Tape and Reel 制造商:Monolithic Power Systems 功能描述:LED driver for TV LED backlight |
| MP24833GN | 制造商:Monolithic Power Systems 功能描述:3A, 55V LED DRIVER WITH INTEGRATED FET - Rail/Tube 制造商:Monolithic Power Systems 功能描述:2.5A, 55V, Prgrmbl Freq White LED Drvr |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。