- 您现在的位置：买卖IC网 > PDF目录178070 > LM5025 (National Semiconductor Corporation) Active Clamp Voltage Mode PWM Controller PDF资料下载
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： | 5/16页 |
| 文件大小： | 316K |
| 代理商： | LM5025 |
Soft-start
The softstart feature allows the power converter to gradually
reach the initial steady state operating point, thus reducing
start-up stresses and surges. At power on, a 20A current is
sourced out of the softstart pin (SS) into an external capaci-
tor. The capacitor voltage will ramp up slowly and will limit
the COMP pin voltage and therefore the PWM duty cycle. In
the event of a fault as determined by V
CC undervoltage, line
undervoltage (UVLO) or second level current limit, the output
gate drivers are disabled and the softstart capacitor is fully
discharged. When the fault condition is no longer present a
softstart sequence will be initiated. Following a second level
current limit detection (CS2), the softstart current source is
reduced to 1A until the first output pulse is generated by the
PWM comparator. The current source returns to the nominal
20A level after the first output pulse (~1V at the SS pin).
Thermal Protection
Internal Thermal Shutdown circuitry is provided to protect the
integrated circuit in the event the maximum junction tem-
perature is exceeded. When activated, typically at 165C,
the controller is forced into a low power standby state with
the output drivers and the bias regulator disabled. The de-
vice will restart after the thermal hysteresis (typically 25C).
During a restart after thermal shutdown, the softstart capaci-
tor will be fully discharged and then charged in the low
current mode (1A) similar to a second level current limit
event. The thermal protection feature is provided to prevent
catastrophic failures from accidental device overheating.
LM5025
www.national.com
13
相关PDF资料 |
PDF描述 |
|---|---|
| LM637ACJ | OP-AMP, 110 uV OFFSET-MAX, 65 MHz BAND WIDTH, CDIP8 |
| LM637ACN | OP-AMP, 110 uV OFFSET-MAX, 65 MHz BAND WIDTH, PDIP8 |
| LM637AMJ | OP-AMP, 55 uV OFFSET-MAX, 65 MHz BAND WIDTH, CDIP8 |
| LM75BIM-5/NOPB | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT |
| LM75 | 2-Wire Serial Temperature Sensor and Monitor |
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 |
发布紧急采购，3分钟左右您将得到回复。