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參數資料
| 型號： | LM5026SD |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | Active Clamp Current Mode PWM Controller |
| 中文描述： | 3 A SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, DSO16 |
| 封裝： | 5 X 5 MM, EXPOSED PAD, LLP-16 |
| 文件頁數： | 3/23頁 |
| 文件大?。?/td> | 936K |
| 代理商： | LM5026SD |
Pin Descriptions
(Continued)
PIN
8
NAME
OUT_A
DESCRIPTION
Main Output Driver
APPLICATION INFORMATION
Output of the main switch PWM gate driver. Capable of 3A peak sink
current.
Output of the active clamp switch gate driver. Capable of 0.5A peak
source and sink current.
Connect directly to Analog Ground
Connect directly to Power Ground.
An external capacitor and an internal 50 μA current source set the
soft-start ramp. The SS current source is reduced to 1 μA following a
restart event. The soft-stop discharge current is 50 μA.
The external opto-coupler connected to the COMP pin sources current
into an internal NPN current mirror. The PWM duty cycle is maximum
with zero input current, while 1mA reduces the duty cycle to zero. The
current mirror improves the frequency response by reducing the ac
voltage across the opto-coupler detector.
Normally biased at 2V. The total external resistance connected between
RT and AGND sets the internal oscillator frequency.
The internal oscillator can be synchronized to an external clock with an
external pull-down device. Multiple LM5026 devices can be synchronized
together by connection of their SYNC pins.
An external resistor divider connected from RT to AGND sets the
maximum output duty cycle for OUT_A.
Connect to system ground plane for reduced thermal resistance.
9
OUT_B
Active Clamp Output Driver
10
11
12
PGND
AGND
SS
Power Ground
Analog Return
Soft-start
13
COMP
Input to the Pulse Width
Modulator
14
RT
Oscillator Frequency
Control
Oscillator Synchronization
Input/Output
15
SYNC
16
DCL
Maximum Duty Cycle
Control
Exposed Pad, underside of
LLP package
-
Exposed
Pad (LLP
Package
Only)
L
www.national.com
3
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM5026SD/NOPB | 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關頻率: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 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| LM5026SDX | 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關頻率: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 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| LM5026SDX/NOPB | 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關頻率: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 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| LM5027 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Voltage Mode Active Clamp Controller |
| LM5027A | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Evaluation Board evaluation board is designed to provide |
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