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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)： | 24/28頁 |
| 文件大?。?/td> | 610K |
| 代理商： | LM5045MH |
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TSSOP
Pin
LLP Pin
Name
Description
Application Information
19
15
SR2
Synchronous Rectifier Driver
Control output for synchronous rectifier gate. Capable of peak
sourcing 100mA and sinking 400mA.
21
17
VCC
Output of Start-Up Regulator
The output voltage of the start-up regulator is initially regulated to
9.5V. Once the secondary side soft-start (SSSR pin) reaches 1V,
the VCC output is reduced to 7.7V. If an auxiliary winding raises
the voltage on this pin above the regulation set-point, the internal
start-up regulator will shutdown, thus reducing the IC power
dissipation.
22
18
PGND
Power Ground
Connect directly to Analog Ground
23, 20
19, 16
LO1, LO2 Low Side Output Driver
Alternating output of the PWM gate driver. Capable of 1.5A peak
source and 2A peak sink current.
24
20
SR1
Synchronous Rectifier Driver
Control output for synchronous rectifier gate. Capable of peak
sourcing 100mA and sinking 400mA.
25, 18
21, 14
BST1,2
Gate Drive Bootstrap
Bootstrap capacitors connected between BST1,2 and SW1,2
provide bias supply for the high side HO1,2 gate drivers. External
diodes are required between VCC and BST1,2 to charge the
bootstrap capacitors when SW1,2 are low.
26, 17
22, 13
HO1,2
High Side Output Driver
High side PWM outputs capable of driving the upper MOSFET of
the bridge with 1.5A peak source and 2A peak sink current.
27, 16
23, 12
HS1,2
Switch Node
Common connection of the high side FET source, low side FET
drain and transformer primary winding.
28
24
VIN
Input Power Source
Input to the Start-up Regulator. Operating input range is 14V to
100V. For power sources outside of this range, the LM5045 can
be biased directly at VCC by an external regulator.
5
www.national.com
LM5045
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| LM5046MHX | SWITCHING CONTROLLER, 540 kHz SWITCHING FREQ-MAX, PDSO28 |
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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 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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