Datasheet > RT7220DLP

RT7220DLP

更新时间： 2024-04-09 18:58:32

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
1页	143K
描述
Synchronous Rectifier Controller with Zero Voltage Switching for Wide Output Voltage Operating Range

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RT7220DLP 数据手册

RT7220D

Synchronous Rectifier Controller with Zero Voltage

Switching for Wide Output Voltage Operating Range

General Description

Features

⚫ Suitable for Flyback Converter in CCM, DCM and

The RT7220D is a Synchronous Rectifier (SR)

controller for Flyback converters operating in

Continuous Conduction Mode (CCM), Discontinuous

Conduction Mode (DCM) and Quasi-Resonant (QR)

mode. The RT7220D will sense the drain voltage of

MOSFET to determine SR gate on/off so as to minimize

turn-off dead-time and enhance efficiency.

Quasi-Resonant (QR) Mode

⚫ Suitable for 3V to 21V V

Range

OUT

⚫ ZVS Function to Optimize Efficiency

(Work with the Primary-Side Controller RT7757)

⚫ <1.65mA Operating Current in ZVS Mode

⚫ <250A Operating Current in Green Mode

The RT7220D supports the wide output voltage range

from 3V to 21V, and a HV LDO is especially built-in for

the MOSFET gate driver at low output voltage. When it

works with the primary-side controller RT7757, the

Zero-Voltage-Switching (ZVS) control can be enabled to

optimize the efficiency at high line.

⚫ Built-in HV LDO to Supply SR Driver when V

Lower than 5V

OUT

⚫ Automatic Dead-Time Tracking Control to

Optimize Efficiency

⚫ Protection

 SR Gate Driver with 6V Clamp

 SR Gate Initial Pull-Low before Start-Up

 SR Minimum Off-Time

Furthermore, the RT7220D provides a green mode

operation in light load condition, which reduces

operation current to be under 250A.

 Fast Turn-Off (<50ns) Gate Driver

Ordering Information

Applications

⚫ USB PD Power Converters

RT7220D

Package Type

QW: WQFN-16L 3x3

⚫ Fast-Charger Power Adapeters

⚫ General Purpose High-Efficiency and/or Compact-

Lead Plating System

G: Green

Size Flyback Power Converters

(Halogen Free and Pb Free)

RT7220D Version

(Refer to Version Table)

Note:

The products are:

 RoHS compliant and compatible with the current

requirements of IPC/JEDEC J-STD-020.

 Suitable for use in SnPb or Pb-free soldering processes.

is a registered trademark of Richtek Technology Corporation.

DS7220D-01T02 May 2023

www.richtek.com

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