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參數(shù)資料
| 型號： | LM2630MTC-ADJ/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | TSSOP-20 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大小： | 681K |
| 代理商： | LM2630MTC-ADJ/NOPB |
Block Diagram
Operation
BASIC OPERATION OF THE CURRENT MODE
CONTROLLED SWITCHING REGULATOR
The main control loop includes the error amplifier, the current
amplifier and PWM comparator (as shown in Figure 1).
During heavy load or any load with FPWM mode enabled,
the controller is in constant frequency current mode opera-
tion: the high-side switch is turned on at the beginning of
each clock cycle, and the output of the error amplifier is
compared with the sensed inductor current ramp; once the
ramp reaches the control level set by the error amplifier, the
PWM comparator reset the driver logic to turn off the high-
side switch; the low-side switch is turned on after certain
delay (the voltage at the SW pin is sensed and the low-side
switch is turned on once the SW pin voltage reaches zero. A
preset maximum delay is 100 ns). The low-side switch stays
10012003
FIGURE 1. LM2630 Block Diagram
LM2630
www.national.com
7
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PDF描述 |
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| LM2630MTC-ADJX | SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO20 |
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| LM2636MWC | SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, UUC |
| LM2636MX/NOPB | SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PDSO20 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2630MTCX-ADJ | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LM2630MTCX-ADJ/NOPB | 制造商:Texas Instruments 功能描述:DC DC Cntrlr Single-OUT Step Down 4.5V to 30V Input 20-Pin TSSOP T/R |
| LM2631 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Synchronous Step-Down Power Supply Controller |
| LM2631MTC-ADJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Mode SMPS Controller |
| LM2633 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Advanced Two-Phase Synchronous Triple Regulator Controller for Notebook CPUs |
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