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參數(shù)資料
| 型號： | MP1530DM |
| 廠商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Triple Output Step-Up Plus Linear Regulators for TFT Bias |
| 中文描述： | 3.6 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | MO-153AB, TSSOP-16 |
| 文件頁數(shù)： | 11/15頁 |
| 文件大?。?/td> | 365K |
| 代理商： | MP1530DM |
MP1530 – TRIPLE OUTPUT STEP-UP PLUS LINEAR REGULATORS FOR TFT BIAS
MP1530 Rev. 1.4
5/19/2006
www.MonolithicPower.com
11
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
Selecting the Rectifier Diodes
The
MP1530’s
demands high-speed rectifiers. Schottky diodes
are
recommended
for
because of their fast recovery time and low
forward voltage. Typically, a 1A Schottky diode
is recommended for the step-up converter.
100mA Schottky diodes such as Central
Semiconductor CMPSH-3 are recommended
for low current charge-pump circuits.
high
switching
frequency
most
applications
Selecting the Output Capacitor of the
Step-Up Converter
The output capacitor is required to maintain the
DC output voltage. Low ESR capacitors are
preferred to keep the output voltage ripple to a
minimum. The characteristics of the output
capacitor also affect the stability of the
regulation control system. A 10μF ceramic
capacitor works well in most applications. In the
case of ceramic capacitors, the impedance of
the capacitor at the switching frequency is
dominated by the capacitance, and so the
output voltage ripple is mostly independent of
the ESR. The output voltage ripple is estimated
to be:
SW
LOAD
2
C
×
MAIN
V
IN
RIPPLE
V
f
I
V
1
×
Where V
RIPPLE
is the output ripple voltage, I
LOAD
is the load current, and C2 is the capacitance of
the output capacitor of the step-up converter.
Selecting the Number of Charge-Pump
Stages
For highest efficiency, always choose the
lowest number of charge-pump stages that
meets the output requirement.
The number of positive charge-pump stages
N
POS
is given by:
D
MAIN
V
MAIN
V
DROPOUT
V
GH
POS
V
2
V
N
=
Where V
D
is the forward voltage drop of the
charge-pump diode, and V
DROPOUT
is the
dropout margin for the linear regulator.
The number of negative charge-pump stages
N
NEG
is given by:
D
MAIN
V
DROPOUT
V
2
GL
NEG
V
V
N
+
=
Use V
DROPOUT
= 1V for positive charge-pump
and V
DROPOUT
= 0.3V for negative charge-pump.
Selecting the Flying Capacitor in Charge-
Pump Stages
Increasing the flying capacitor C
X
values
increases the output current capability. A 0.1μF
ceramic capacitor works well in most low
current applications. The flying capacitor’s
voltage rating must exceed the following:
MAIN
V
CX
N
V
×
>
Where N is the stage number in which the flying
capacitor appears.
Step-Up Converter Compensation
The MP1530 uses current mode control which
unlike voltage mode has only a single pole roll
off due to the output filter. The DC gain (A
V
DC
) is
equated from the product of current control to
output gain (A
V
CSCONTROL
), error amplifier gain
(A
V
EA
), and the feedback divider.
1
FB
EA
CSCONTROL
DC
A
Av
A
Av
×
×
=
LOAD
IN
CSCONTROL
I
V
4
A
×
=
MAIN
V
1
FB
1
FB
V
A
=
MAIN
V
LOAD
1
FB
IN
DC
I
V
V
×
1600
Av
×
×
=
The output filter pole is given in hertz by:
2
C
V
I
f
MAIN
LOAD
FILTERPOLE
×
×
π
=
The output filter zero is given in hertz by:
2
C
R
2
1
f
ESR
FILTERZERO
×
×
π
=
Where R
ESR
is the output capacitor’s equivalent
series resistance.
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| MP1530 | Triple Output TFT Bias Converter |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MP1530DM-LF | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.4MHz Triple Output Step-Up for TFT Bias 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: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP1530DM-LF-Z | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.4MHz Triple Output Step-Up for TFT Bias 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: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP1530DQ | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:Triple Output Step-Up Plus Linear Regulators for TFT Bias |
| MP1530DQ-LF-P | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.4MHz Triple Output Step-Up for TFT Bias 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: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP1530DQ-LF-Z | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.4MHz Triple Output Step-Up for TFT Bias 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: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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