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交流/直流和直流/直流控制器（外部 fet）

lm5045 数据表、产品信息和支持 | 德州仪器 ti.com.cn-和记娱乐手机app

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具有集成 mosfet 驱动器的全桥接 pwm 控制器

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lm5045

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产品详情

vin (max) (v) 14 operating temperature range (°c) -40 to 125 control mode current topology full bridge, half bridge, push pull rating catalog features current limiting, high-voltage startup, integrated gate drivers, multi-topology, sr logic, synchronization pin duty cycle (max) (%) 50
vin (max) (v) 14 operating temperature range (°c) -40 to 125 control mode current topology full bridge, half bridge, push pull rating catalog features current limiting, high-voltage startup, integrated gate drivers, multi-topology, sr logic, synchronization pin duty cycle (max) (%) 50
28 62.08 mm² 9.7 x 6.4 28 25 mm² 5 x 5
  • highest integration controller for small form
    factor, high-density power converters
  • high-voltage start-up regulator
  • intelligent sync rectifier start-up allows linear
    turnon into prebiased loads
  • synchronous rectifiers disabled in uvlo mode and
    hiccup mode
  • two independent, programmable synchronous rectifier
    dead-time adjustments
  • four high-current 2-a bridge gate drivers
  • wide-bandwidth optocoupler interface
  • configurable for either current mode or voltage
    mode control
  • dual-mode overcurrent protection
  • resistor programmed 2-mhz oscillator
  • programmable line uvlo and ovp
  • highest integration controller for small form
    factor, high-density power converters
  • high-voltage start-up regulator
  • intelligent sync rectifier start-up allows linear
    turnon into prebiased loads
  • synchronous rectifiers disabled in uvlo mode and
    hiccup mode
  • two independent, programmable synchronous rectifier
    dead-time adjustments
  • four high-current 2-a bridge gate drivers
  • wide-bandwidth optocoupler interface
  • configurable for either current mode or voltage
    mode control
  • dual-mode overcurrent protection
  • resistor programmed 2-mhz oscillator
  • programmable line uvlo and ovp

the lm5045 pwm controller contains all of the features necessary to implement full-bridge topology power converters using either current mode or voltage mode control. this device is intended to operate on the primary side of an isolated dc-dc converter with input voltage up to 100 v. this highly integrated controller-driver provides dual 2-a high-side and low-side gate drivers for the four external bridge mosfets plus control signals for the secondary-side synchronous rectifier mosfets. external resistors program the leading and trailing edge dead-time between the main and synchronous rectifier control signals. intelligent start-up of the synchronous rectifiers allows monotonic turnon of the power converter even with prebias load conditions. additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start, and a 2-mhz capable oscillator with synchronization capability and thermal shutdown.

the lm5045 pwm controller contains all of the features necessary to implement full-bridge topology power converters using either current mode or voltage mode control. this device is intended to operate on the primary side of an isolated dc-dc converter with input voltage up to 100 v. this highly integrated controller-driver provides dual 2-a high-side and low-side gate drivers for the four external bridge mosfets plus control signals for the secondary-side synchronous rectifier mosfets. external resistors program the leading and trailing edge dead-time between the main and synchronous rectifier control signals. intelligent start-up of the synchronous rectifiers allows monotonic turnon of the power converter even with prebias load conditions. additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start, and a 2-mhz capable oscillator with synchronization capability and thermal shutdown.
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类型 标题 下载最新的英语版本 日期
* 数据表 | 2015年 1月 28日
选择指南 2018年 7月 31日
选择指南 2018年 6月 25日
用户指南 2013年 5月 6日
应用手册 2013年 5月 6日
应用手册 2013年 5月 6日

设计和开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

评估板

— 用于 lm5045 的评估板

the lm5045 evaluation board is designed to provide the design engineer with a fully functional power converter based on the full-bridge topology to evaluate the lm5045 pwm controller. the evaluation board is provided in an industry standard quarter brick footprint.
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仿真模型
snvm006.zip (350 kb) - pspice model
计算工具

sluc501 — lm5045 design calculator

支持的产品和硬件

支持的产品和硬件

产品
交流/直流和直流/直流控制器（外部 fet）
lm5045 — 具有集成 mosfet 驱动器的全桥接 pwm 控制器
参考设计

— 薄型 140w 全桥参考设计

此电源是一款 140w 全桥参考设计，适用于由于平面变压器而需要高密度和低元件高度的应用。该设计基于硬开关全桥拓扑，在次级侧使用肖特基二极管，并由 lm5045 驱动。平面变压器用于更大限度地减小尺寸和高度。印刷电路板 (pcb) 有六层，元件从上到下进行组装。该单元专为在环境温度 (ta) < 40°c 时在额定负载下持续运行而设计。对于较高的环境温度，建议最小空气流量为 200 线性英尺/分钟 (lfm)。
测试报告:
封装 引脚 cad 符号、封装和 3d 模型
28
28

订购和质量

包含信息：
  • rohs
  • reach
  • 器件标识
  • 引脚镀层/焊球材料
  • msl 等级/回流焊峰值温度
  • mtbf/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

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