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UCC28781-Q1

現行

具有整合式 SR 控制的汽車、高密度、零電壓切換 (ZVS) 返馳控制器

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產品規格表

UCC28781-Q1

現行
產品規格表 立即訂購

產品詳細資料

Topology Flyback Control mode Secondary-side regulation Features Adaptive burst mode, Overvoltage protection, Secondary-side regulated, X-capacitor discharge, Zero voltage switching
Topology Flyback Control mode Secondary-side regulation Features Adaptive burst mode, Overvoltage protection, Secondary-side regulated, X-capacitor discharge, Zero voltage switching
WQFN (RTW) 24 16 mm² (4 mm × 4 mm)
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1, TA: –40°C to 125°C
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C2A
  • Functional Safety Capable
    • Documentation available to aid functional safety system design
  • Switching frequency: > 500 kHz
  • Enables peak efficiency > 93 %
  • Enables < 50 mW stand-by power (basic systems)
  • 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
  • Over-temperature, overvoltage, output short-circuit, overcurrent, over-power, and pin-fault protections
  • Auto-recovery fault-response
  • 4 mm × 4 mm, 24-pin, QFN package
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1, TA: –40°C to 125°C
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C2A
  • Functional Safety Capable
    • Documentation available to aid functional safety system design
  • Switching frequency: > 500 kHz
  • Enables peak efficiency > 93 %
  • Enables < 50 mW stand-by power (basic systems)
  • 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
  • Over-temperature, overvoltage, output short-circuit, overcurrent, over-power, and pin-fault protections
  • Auto-recovery fault-response
  • 4 mm × 4 mm, 24-pin, QFN package

The UCC28781-Q1 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-Q1 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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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 UCC28781-Q1 Zero-Voltage-Switching Flyback Controller with Dedicated Synchronous Rectifier Gate-Drive datasheet PDF | HTML 2021/2/24
白皮書 Isolated Bias Power Supply Architecture for HEV and EV Traction Inverters PDF | HTML 2023/10/11
功能安全資訊 UCC28781-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021/11/9

設計與開發

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開發板

UCC28781EVM-053 — 適用於車用 500-Vdc 輸入 ZVS 返馳電源供應器應用的 UCC28781-Q1 評估模組

UCC28781EMV-053 展示了使用零電壓切換返馳 (ZVSF) 控制器的 60-W、15-V 輸出的高效率，高密度，高壓汽車偏壓電源。 UCC28781-Q1 直接驅動一次側矽 MOSFET，並透過 UCC5304 絕緣式閘極驅動器驅動二次側同步整流器，以提升效率並達到 ZVS。

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WQFN (RTW) 24 Ultra Librarian
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