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參數(shù)資料
| 型號： | LM3524DMWC |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.2 A SWITCHING CONTROLLER, 350 kHz SWITCHING FREQ-MAX, UUC |
| 封裝： | WAFER |
| 文件頁數(shù)： | 2/22頁 |
| 文件大?。?/td> | 728K |
| 代理商： | LM3524DMWC |
Typical Applications (Continued)
BASIC SWITCHING REGULATOR THEORY
AND APPLICATIONS
The basic circuit of a step-down switching regulator circuit is
shown in
Figure 12, along with a practical circuit design us-
ing the LM3524D in
Figure 15.
The circuit works as follows: Q1 is used as a switch, which
has ON and OFF times controlled by the pulse width modu-
lator. When Q1 is ON, power is drawn from V
IN and supplied
to the load through L1; V
A is at approximately VIN,D1isre-
verse biased, and C
o is charging. When Q1 turns OFF the in-
ductor L1 will force V
A negative to keep the current flowing in
it, D1 will start conducting and the load current will flow
through D1 and L1. The voltage at V
Ais smoothed by the L1,
C
o
filter giving a clean DC output. The current flowing
through L1 is equal to the nominal DC load current plus
some
I
L which is due to the changing voltage across it. A
good rule of thumb is to set
I
LP-P 40% xIo.
DS008650-15
FIGURE 11. Boosted Current Polarity Inverter
DS008650-16
FIGURE 12. Basic Step-Down Switching Regulator
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3524DMX | 功能描述:電壓模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| LM3524DMX/NOPB | 功能描述:電壓模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| LM3524DN | 功能描述:電壓模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| LM3524DN | 制造商:Texas Instruments 功能描述:ENHANCED PWM CONTROLLER 3524 DIP |
| LM3524DN/NOPB | 功能描述:電壓模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
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