- 您現在的位置：買賣IC網 > PDF目錄67756 > LM5025CSDX (NATIONAL SEMICONDUCTOR CORP) SWITCHING CONTROLLER, DSO16 PDF資料下載
參數資料
| 型號： | LM5025CSDX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING CONTROLLER, DSO16 |
| 封裝： | LLP-16 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 362K |
| 代理商： | LM5025CSDX |
September 18, 2008
LM5025C
Active Clamp Voltage Mode PWM Controller
General Description
The LM5025C is a functional variant of the LM5025 active
clamp PWM controller. The functional differences of the
LM5025C are: The maximum duty cycle of the LM5025C is
increased from 80% to 91%. The soft-start capacitor charging
current is increased from 20 A to 90 A. The V
CC regulator
current limit threshold is increased from 25 mA to 55 mA. The
CS1 and CS2 current limit thresholds have been increased to
0.5V. The internal CS2 filter discharge device has been dis-
abled and no longer operates each clock cycle. The internal
V
CC and VREF regulators continue to operate when the line
UVLO pin is below threshold.
The LM5025C PWM controller contains all of the features
necessary to implement power converters utilizing the Active
Clamp / Reset technique. With the active clamp technique,
higher efficiencies and greater power densities can be real-
ized compared 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 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 100 ns. The LM5025C 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
■ Internal Start-up Bias Regulator
■ 3A Compound Main Gate Driver
■ Programmable Line Under-Voltage Lockout (UVLO) with
Adjustable Hysteresis
■ Voltage Mode Control with Feed-Forward
■ Adjustable Dual Mode Over-Current Protection
■ Programmable Overlap or Deadtime between the Main
and Active Clamp Outputs
■ Volt x Second Clamp
■ Programmable Soft-start
■ Leading Edge Blanking
■ Single Resistor Programmable Oscillator
■ Oscillator UP / DOWN Sync Capability
■ Precision 5V Reference
■ Thermal Shutdown
Packages
■ TSSOP-16
■ LLP-16 (5x5 mm) Thermally Enhanced
Typical Application Circuit
30058901
Simplified Active Clamp Forward Power Converter
2008 National Semiconductor Corporation
300589
www.national.com
LM5025C
Active
Clamp
Voltage
Mode
PWM
Controller
相關PDF資料 |
PDF描述 |
|---|---|
| LM5025CSD | SWITCHING CONTROLLER, DSO16 |
| LM5117PMHX | SWITCHING CONTROLLER, 530 kHz SWITCHING FREQ-MAX, PDSO20 |
| LM5117PSQX | SWITCHING CONTROLLER, 530 kHz SWITCHING FREQ-MAX, QCC24 |
| LM5117PMHE | SWITCHING CONTROLLER, 530 kHz SWITCHING FREQ-MAX, PDSO20 |
| LM5117PSQ | SWITCHING CONTROLLER, 530 kHz SWITCHING FREQ-MAX, QCC24 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM5025DMTC/NOPB | 功能描述:Forward Converter Regulator Positive, Isolation Capable Output Step-Up/Step-Down DC-DC Controller IC 16-TSSOP 制造商:texas instruments 系列:- 包裝:管件 零件狀態:有效 輸出類型:晶體管驅動器 功能:升壓/降壓 輸出配置:正，可提供隔離 拓撲:正激轉換器 輸出數:2 輸出階段:1 電壓 - 電源（Vcc/Vdd）:8 V ~ 15 V 頻率 - 開關:200kHz ~ 580kHz 占空比（最大）:0.8 同步整流器:無 時鐘同步:是 串行接口:- 控制特性:空載時間控制，頻率控制，斜坡，軟啟動 工作溫度:-40°C ~ 125°C （TJ） 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商器件封裝:16-TSSOP 標準包裝:92 |
| LM5025EVAL/NOPB | 功能描述:EVALUATION BOARD FOR LM5025 RoHS:是 類別:編程器，開發系統 >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:PowerWise® 產品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩壓器拓撲結構:升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| LM5025MTC | 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 |
| LM5025MTC/MEY8 | 制造商:Texas Instruments 功能描述: |
| LM5025MTC/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 |
發布緊急采購，3分鐘左右您將得到回復。