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參數(shù)資料
| 型號： | LM2651MTC-3.3 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Isolated Flyback Switching Regulator with 9V Output |
| 中文描述： | 2.6 A SWITCHING REGULATOR, 345 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | TSSOP-16 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大小： | 222K |
| 代理商： | LM2651MTC-3.3 |
Typical Performance Characteristics
(Continued)
Block Diagram
Operation
The LM2651 operates in a constant frequency (300 kHz),
current-mode PWM for moderate to heavy loads; and it auto-
matically switches to hysteretic mode for light loads. In hys-
teretic mode, the switching frequency is reduced to keep the
efficiency high.
Main Operation
When the load current is higher than the sleep mode thresh-
old, the part is always operating in PWM mode. At the begin-
ning of each switching cycle, the high-side switch is turned
on, the current from the high-side switch is sensed and com-
pared with the output of the error amplifier (COMP pin).
When the sensed current reaches the COMP pin voltage
level, the high-side switch is turned off; after 40 ns (dead-
Current Limit vs Junction
Temperature (V
OUT
= 3.3V)
DS100925-13
Current Limit vs Input
Voltage (V
OUT
= 3.3V)
DS100925-14
DS100925-3
FIGURE 1. LM2651 Block Diagram
L
www.national.com
7
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相關代理商/技術參數(shù) |
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|---|---|
| LM2651MTC-ADJ | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM2651MTC-ADJ | 制造商:Texas Instruments 功能描述:SWITCHING REG 1.5A ADJ SMD 2651 |
| LM2651MTC-ADJ/NOPB | 功能描述:直流/直流開關轉換器 1.5A HIGH EFFICIENCY SWITCHING REG RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM2651MTCX-1.8 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.5A High Efficiency Synchronous Switching Regulator |
| LM2651MTCX-1.8/J7001113 | 制造商:Texas Instruments 功能描述: |
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