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參數(shù)資料
| 型號： | MP1517 |
| 廠商： | Monolithic Power Systems, Inc. |
| 英文描述： | 3A, 25V, 1.1MHz Step-Up Converter |
| 中文描述： | 第3A，25V的，為1.1MHz升壓轉換器 |
| 文件頁數(shù)： | 5/13頁 |
| 文件大?。?/td> | 323K |
| 代理商： | MP1517 |
MP1517 – 3A, 25V, 1.1MHz STEP-UP CONVERTER
MP1517 Rev. 1.4
4/28/2006
www.MonolithicPower.com
5
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
OPERATION
The MP1517 uses a 1.1MHz fixed-frequency,
current-mode regulation architecture to regulate
the output. The operation of the MP1517 can be
understood by referring to the block diagram of
Figure 1. At the beginning of each cycle, the
N-Channel MOSFET switch is turned on,
forcing the inductor current to rise. The current
at the source of the switch is internally
measured and converted to a voltage by the
current sense amplifier. That voltage is
compared to the error voltage at COMP. The
voltage at the output of the error amplifier is an
amplified version of the difference between the
700mV reference voltage and the feedback
voltage. When these two voltages are equal,
the PWM comparator turns off the switch
forcing the inductor current to the output
capacitor through the external rectifier. This
causes the inductor current to decrease. The
peak inductor current is controlled by the
voltage at COMP, which in turn is controlled by
the output voltage. Thus the output voltage
controls the inductor current to satisfy the load.
The use of current-mode regulation improves
transient response and control loop stability.
PWM
CONTROL
LOGIC
CURRENT
SENSE
AMP
SOFT-START
OSCILLATOR
LDO
2.4V
--
+
GM
+
--
--
+
PGND
FB
COMP
SS
SGND
0.7V
SW
IN
8
--
+
OLS
16V
EN
BP
2.4V
0.9V
MP1517_BD01
3
4
7
15
1
16
9, 10
11, 12
5, 13
Figure 1—Functional Block Diagram
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PDF描述 |
|---|---|
| MP1518DG | Fixed Frequency WLED Driver Evaluation Board |
| MP1528DQ | 9 Lamp, 20mA Preciscion WLED Driver Evaluation Board |
| MP1518DJ | Fixed Frequency White LED Driver |
| MP1518 | Fixed Frequency White LED Driver |
| MP1518DJE | Fixed Frequency White LED Driver |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MP1517DR | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:3A, 25V, 1.1MHz Step-Up Converter |
| MP1517DR-LF-P | 功能描述:開關變換器、穩(wěn)壓器與控制器 3A Switch / 25Vout Step-Up Converter 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 |
| MP1517DR-LF-Z | 功能描述:開關變換器、穩(wěn)壓器與控制器 3A Switch / 25Vout Step-Up Converter 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 |
| MP1518 | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:Fixed Frequency White LED Driver |
| MP1518DG | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:Fixed Frequency White LED Driver |
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