产品详细信息

Control mode Secondary-side regulation Switching frequency (Max) (kHz) 1500 UVLO thresholds on/off (V) 17/10.5 Features SSR, Zero Voltage Switching, OVP, Adaptive Burst Mode, X-Cap Discharge Operating temperature range (C) -40 to 125 Rating Catalog Device type Controllers Topology Flyback
Control mode Secondary-side regulation Switching frequency (Max) (kHz) 1500 UVLO thresholds on/off (V) 17/10.5 Features SSR, Zero Voltage Switching, OVP, Adaptive Burst Mode, X-Cap Discharge Operating temperature range (C) -40 to 125 Rating Catalog Device type Controllers Topology Flyback
WQFN (RTW) 24 16 mm² 4 x 4
  • Switching frequency: > 500 kHz
  • Enables peak efficiency > 93 %
  • Enables < 45 mW stand-by power
  • Adaptive control for zero-voltage-switching (ZVS) and dead-time optimization
  • EMI frequency-dithering without trade-offs on transient response or audible noise
  • Programmable adaptive burst mode (ABM) with internal compensation
  • X-capacitor discharge capability
  • Over-temperature, overvoltage, output short-circuit, overcurrent, over-power, and pin-fault protections
  • Auto-recovery fault-responses
  • 4 mm × 4 mm, 24-pin, QFN package
  • Switching frequency: > 500 kHz
  • Enables peak efficiency > 93 %
  • Enables < 45 mW stand-by power
  • Adaptive control for zero-voltage-switching (ZVS) and dead-time optimization
  • EMI frequency-dithering without trade-offs on transient response or audible noise
  • Programmable adaptive burst mode (ABM) with internal compensation
  • X-capacitor discharge capability
  • Over-temperature, overvoltage, output short-circuit, overcurrent, over-power, and pin-fault protections
  • Auto-recovery fault-responses
  • 4 mm × 4 mm, 24-pin, QFN package

The UCC28781 is a zero-voltage-switching (ZVS) controller which can be used at very high switching frequencies to minimize the size of the transformer and enable high power density.

With direct synchronous rectifier (SR) control, the controller does not need a separate SR controller, as it can drive the SR FET directly to maximize efficiency and simplify design. (For isolated applications, an isolated gate-driver IC is required.)

Using adaptive dead-time control for ZVS, switching losses and EMI are minimized. This design results in a controller with extremely high conversion efficiency across the entire operating range.

The programmable adaptive burst mode (ABM) gives flexibility to control when the controller enters and exits standby mode to optimize standby power in light and no-load conditions. ABM also helps to reduce ripple and minimize audible noise.

The controller offers multiple protection modes with automatic restart (retry) responses.

The UCC28781 is a zero-voltage-switching (ZVS) controller which can be used at very high switching frequencies to minimize the size of the transformer and enable high power density.

With direct synchronous rectifier (SR) control, the controller does not need a separate SR controller, as it can drive the SR FET directly to maximize efficiency and simplify design. (For isolated applications, an isolated gate-driver IC is required.)

Using adaptive dead-time control for ZVS, switching losses and EMI are minimized. This design results in a controller with extremely high conversion efficiency across the entire operating range.

The programmable adaptive burst mode (ABM) gives flexibility to control when the controller enters and exits standby mode to optimize standby power in light and no-load conditions. ABM also helps to reduce ripple and minimize audible noise.

The controller offers multiple protection modes with automatic restart (retry) responses.

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UCC28782 正在供货 具有防 EMI 抖动、X 电容器放电和偏置电源管理功能的高密度有源钳位反激式控制器 Active clamp flyback controller for higher power density and increased efficiency.

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类型 项目标题 下载最新的英语版本 日期
* 数据表 UCC28781 Zero-Voltage-Switching Flyback Controller with Dedicated Synchronous Rectifier Gate-Drive 数据表 PDF | HTML 08 Dec 2021
应用手册 Flyback Selection Guide PDF | HTML 23 Jun 2022
用户指南 使用 UCC28781EVM-053 60W、15V ZVS 反激式转换器 PDF | HTML 下载英文版本 PDF | HTML 18 May 2022
证书 UCC28781EVM-053 EU RoHS Declaration of Conformity (DoC) 19 Aug 2021

设计和开发

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评估板

UCC28781EVM-053 — 适用于 UCC28781-Q1 汽车类 500Vdc 输入 ZVS 反激式电源应用的评估模块

UCC28781EMV-053 展示了采用零电压开关反激式 (ZVSF) 控制器的高效率、高密度、高电压汽车偏置电源,具有 60W、15V 输出。UCC28781-Q1 直接驱动初级侧硅 MOSFET,并通过 UCC5304 隔离式栅极驱动器驱动次级侧同步整流器,用于提高效率并实现 ZVS。

用户指南: PDF | HTML
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WQFN (RTW) 24 了解详情

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  • 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
  • 认证摘要
  • 持续可靠性监测

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