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參數資料
| 型號： | LM5025SD |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | Active Clamp Voltage Mode PWM Controller |
| 中文描述： | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 5 X 5 MM, LLP-16 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 316K |
| 代理商： | LM5025SD |
LM5025
Active Clamp Voltage Mode PWM Controller
General Description
The LM5025 PWM controller contains all of the features
necessary to implement power converters utilizing the Active
Clamp / Reset technique. The device can be configured to
control either a P-Channel clamp switch or an N-Channel
clamp switch. With the active clamp technique, higher effi-
ciencies and greater power densities can be realized com-
pared to conventional catch winding or RDC clamp / reset
techniques. Two control outputs are provided, the main
power switch control (OUT_A) and the active clamp switch
control (OUT_B). The active clamp output can be configured
for either a guaranteed overlap time (for P-Channel switch
applications) or a guaranteed deadtime (for N_Channel ap-
plications). The two internal compound gate drivers parallel
both MOS and Bipolar devices, providing superior gate drive
characteristics. This controller is designed for high-speed
operation including an oscillator frequency range up to 1MHz
and total PWM and current sense propagation delays less
than 100ns. The LM5025 includes a high-voltage start-up
regulator that operates over a wide input range of 13V to
90V. Additional features include: Line Under Voltage Lockout
(UVLO), softstart, oscillator UP/DOWN sync capability, pre-
cision reference and thermal shutdown.
Features
n
Internal Start-up Bias Regulator
n
3A Compound Main Gate Driver
n
Programmable Line Under-Voltage Lockout (UVLO) with
Adjustable Hysteresis
n
Voltage Mode Control with Feed-Forward
n
Adjustable Dual Mode Over-Current Protection
n
Programmable Overlap or Deadtime between the Main
and Active Clamp Outputs
n
Volt x Second Clamp
n
Programmable Soft-start
n
Leading Edge Blanking
n
Single Resistor Programmable Oscillator
n
Oscillator UP / DOWN Sync Capability
n
Precision 5V Reference
n
Thermal Shutdown
Packages
n
TSSOP-16
n
LLP-16 (5x5 mm) Thermally Enhanced
Typical Application Circuit
20086901
Simplified Active Clamp Forward Power Converter
March 2004
LM5025
Active
Clamp
V
oltage
Mode
PWM
Controller
2004 National Semiconductor Corporation
DS200869
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM5025SD/NOPB | 功能描述:電壓模式 PWM 控制器 100V Forward Active Clamp RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| LM5025SDX | 制造商:Texas Instruments 功能描述:Voltage Mode PWM Controller 3A/1A 16-Pin LLP EP T/R |
| LM5025SDX/NOPB | 功能描述:電壓模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| LM5026 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Active Clamp Current Mode PWM Controller |
| LM5026_09 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Active Clamp Current Mode PWM Controller |
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