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参数资料
| 型号： | LM5025 |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | Active Clamp Voltage Mode PWM Controller |
| 中文描述： | 有源钳位电压模式PWM控制器 |
| 文件页数： | 1/16页 |
| 文件大小： | 316K |
| 代理商： | LM5025 |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM5025A | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Active Clamp Voltage Mode PWM Controller |
| LM5025AEVAL | 功能描述:BOARD EVALUATION LM5025A RoHS:否 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:PowerWise® 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| LM5025AEVAL/NOPB | 功能描述:电源管理IC开发工具 LM5025A EVAL BOARD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| LM5025AMTC | 功能描述:电压模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| LM5025AMTC/NOPB | 功能描述:电压模式 PWM 控制器 100V Forward Active Clamp RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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