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參數(shù)資料
| 型號： | LM5045MH |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 540 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | ETSSOP-28 |
| 文件頁數(shù)： | 17/28頁 |
| 文件大?。?/td> | 610K |
| 代理商： | LM5045MH |
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CURRENT SENSE
The CS pin receives an input signal representative of its
transformer’s primary current, either from a current sense
transformer or from a resistor located at the junction of source
pin of the primary switches, as shown in Figure 18 and Figure
19 respectively. In both the cases, the filter components R
F
and C
F should be located as close to the IC as possible, and
the ground connection from the current sense transformer, or
R
SENSE should be a dedicated trace to the appropriate GND
pin. Please refer to the layout section for more layout tips.
The current sense components must provide a signal >
710mV at the CS pin during an over-load event. Once the
voltage on the CS pin crosses the current limit threshold, the
current sense comparator terminates the PWM pulse and
starts to charge the RES pin. Depending on the configuration
of the RES pin, the LM5045 will eventually initiate a hiccup
mode restart or be in continuous current limit.
30145415
FIGURE 18. Transformer Current Sense
30145422
FIGURE 19. Resistor Current Sense
www.national.com
24
LM5045
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM5045MH/NOPB | 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| LM5045MHX | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Full-Bridge PWM Controller with Integrated MOSFET Drivers |
| LM5045MHX/NOPB | 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| LM5045SQ | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Full-Bridge PWM Controller with Integrated MOSFET Drivers |
| LM5045SQ/NOPB | 功能描述:電流型 PWM 控制器 Full-Bridge PWM Cntrlr RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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