Datasheet > RT7220E

RT7220E

更新时间： 2025-03-21 18:35:39

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
29页	1006K
描述
Synchronous Rectifier Controller for Asymmetrical Half-Bridge with a Wide Output Voltage Operating Range

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RT7220E 数据手册

RT7220E

Synchronous Rectifier Controller for Asymmetrical Half-

Bridge with a Wide Output Voltage Operating Range

1 General Description

3 Features

⚫ Suitable for Low-Side SR Control of AHB in CRM,

The RT7220E is a Synchronous Rectifier (SR) controller

for Asymmetrical Half-Bridge (AHB) converters

operating in Critical Conduction Mode (CRM), Cycle

Skipping Mode (CSM), and Burst Mode (BM). The

RT7220E detects the drain voltage of the MOSFET to

control the on/off state of the SR gate. This functionality

is intended to minimize turn-off dead-time and deliver

sine-wave energy through the SR gate pulses,

enhancing efficiency.

CSM and BM

⚫ Suitable for 5V to 48V V

Range

OUT

⚫ Double Pulses Function to Optimize Efficiency

(Works with the AHB Controller RT7795)

⚫ <1.2mA Operating Current in Normal Mode

⚫ <160A Operating Current in Green Mode

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

is Lower than 4.5V

VDD

The RT7220E supports a wide output voltage range

from 5V to 48V, and a HV LDO is built-in for the

MOSFET gate driver at low output voltage. When used

with the AHB controller RT7795, the double pulses

function can be enabled to optimize efficiency at heavy

load/low output voltage.

⚫ Automatic Dead-Time Tracking Control to

Optimize Efficiency

⚫ Protection

⚫ SR Gate Driver with 8V Clamp

⚫ SR Gate Initial Pull-Low before Start-Up

⚫ SR Minimum On-Time

Furthermore, the RT7220E provides green mode

operation under light load conditions, reducing

operation current to below 160A.

4 Applications

⚫ USB PD Power Converters

The recommended junction temperature range is −40C

to 125C, and the ambient temperature range is −40C

to 105C.

⚫ Fast-Charger Power Adapters

⚫ General Purpose High-Efficiency and/or Compact-

Size AHB Power Converters

2 Ordering Information

RT7220E

Packing

A: Standard

Trim Code

(Refer to Version Table)

Package Type⁽¹⁾

S: SOP-8

Note 1.

Richtek products are Richtek Green Policy compliant

(1)

and marked with

indicates compatible with the

current requirements of IPC/JEDEC J-STD-020.

is a registered trademark of Richtek Technology Corporation.

DS7220E-00 July 2024

www.richtek.com

12 3 4 5 6 7...29

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