參數(shù)資料
型號(hào)： LM5025SDX
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 穩(wěn)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(yè)數(shù)： 1/16頁(yè)
文件大?。?/td> 316K
代理商： LM5025SDX
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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參數(shù)描述
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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
LM5026EVAL 功能描述:BOARD EVALUATION LM5026 RoHS:否 類(lèi)別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:PowerWise® 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類(lèi)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(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開(kāi)關(guān):3MHz 板類(lèi)型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
LM5026EVAL/NOPB 功能描述:電源管理IC開(kāi)發(fā)工具 LM5026 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
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