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参数资料
| 型号： | LM2630MTC-ADJX |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | PLASTIC, TSSOP-20 |
| 文件页数： | 13/14页 |
| 文件大小： | 373K |
| 代理商： | LM2630MTC-ADJX |
Block Diagram
10012003
FIGURE 1. LM2630 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 con-
troller is in constant frequency current mode operation: 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 on until the end of the cycle
www.national.com
8
100120 Version 9 Revision 2
Print Date/Time: 2011/08/25 17:11:52
LM2630
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相关代理商/技术参数 |
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|---|---|
| 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 制造商全称:National Semiconductor 功能描述:Synchronous Step-Down Power Supply Controller |
| LM2631MTC-ADJ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Current-Mode SMPS Controller |
| LM2633 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Advanced Two-Phase Synchronous Triple Regulator Controller for Notebook CPUs |
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