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參數(shù)資料
| 型號： | sp6650 |
| 英文描述： | High Efficiency 600mA Synchronous Buck Regulator(高效率,600mA同步補償穩(wěn)壓器) |
| 中文描述： | 600mA的高效率同步降壓穩(wěn)壓器（高效率，600mA的同步補償穩(wěn)壓器） |
| 文件頁數(shù)： | 12/17頁 |
| 文件大?。?/td> | 170K |
| 代理商： | SP6650 |
12
Rev. 2/4/02
SP6650 High Efficiency 600mA Synchronous Buck Regulator
Copyright 2002 Sipex Corporation
TABLE 1.
DESIGNATION
DESCRIPTION
MANUFACTURER
PART NUMBER
COMMENTS
22
μ
H/0.77Arms/0.104DCR
TDK
SLF7030T-220MR86
SHIELDED
INDUCTOR
22
μ
H/1.1Arms/0.071DCR
MURATA
LQS66C220M04
L1
22
μ
H/0.095DCR
SUMIDA
CDRH6D28
SHIELDED
47
μ
H/0.76Arms/0.15DCR
MURATA
LQS66C470M04
SHIELDED
47
μ
H/0.72Arms/0.37DCR
SUMIDA
CR54
C2, C3
47
μ
F/350m
/500mA
NEMCO
LSR47/10C-350
INPUT, OUTPUT 47
μ
F/350m
/500mA
AVX
TPSC476010R0350
FILTER
33
μ
F/375m
/542mA
AVX
TPSC336010R0375
CAPACITORS
22
μ
F/700m
/348mA
AVX
TPSB226010R0700
R2,R3
100K/63mW/1%Tolerance
Any approved
Any Package:
R1
10/63mW/5%Tolerance
0402,0505,0603 etc.
The schematic and description is shown in
Ad-
ditional Application Circuits
.
Another function of the output capacitor is to
hold up the output voltage during the load tran-
sient, and thus prevent excessive overshoot and
undershoot. For that, the recommended capaci-
tor value is greater than 22uF.
An input capacitor can reduce the peak current
drawn from the battery, improve efficiency, and
significantly reduce high frequency noises in-
duced by a switching power supply. The appli-
cable capacitors are tantalum, electrolytic and
ceramic capacitors. An RC filter is recommended
on the Vin pin (pin 2) to effectively cut down the
noise which can impact the IC control circuit.
The time constant of the RC filter needs to be at
least 5 times higher than the switching period,
calculated as 1/F
LP
during CCM.
APPLICATION INFORMATION
Output Voltage Program
The output voltage can be programmed by the
external voltage divider as shown on page 1.
First pick a resistor value less than 100k for R3.
A large R3 value would reduce the AC voltage
seen by the loop comparator because the FB pin
capacitance (can be as high as 10pF) can form a
low pass filter with R3 paralleling with R2. Lack
of AC voltage to the loop comparator would
give rise to pulse jittering and higher output
ripple. Once the R3 value is picked, R2 can be
calculated from
R
2
=
(
V
OUT
- 1
)
V
REF
R
3
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP6650EB | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6650EU | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6650EU/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High Efficiency 600mA Synchronous Buck Regulator Ideal for portable designs powered with Li Ion battery |
| SP6650EU-L | 功能描述:DC/DC 開關控制器 High Eff 600mA Synchronous RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| SP6650EU-L/TR | 功能描述:DC/DC 開關控制器 High Eff 600mA Synchronous RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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