RT4841

®

DS4841-00 May 2021

www.richtek.com

1

©

Copyright

2021 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Applications



TFT LCD Monitor Panel



TFT LCD TV Panel

Pin Configuration

WQFN-20L 4x4

(TOP VIEW)

Ordering Information

Note :

Richtek products are :

 RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

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

Marking Information

5A Synchronous Boost Converter with

Output Isolation MOS

General Description

The RT4841 is Synchronous Boost Converter with output

isolation MOS for active matrix thin film transistor (TFT)

liquid crystal displays (LCDs).

The Device incorporates current mode, fixed-frequency,

pulse width modulation (PWM) circuitry and fully integrated

synchronous boost converter with a 80m

Ω power switch

and a 80m

Ω rectifier switch to achieve high efficiency,

small size and fast transient response in TFT-LCD

applications. Moreover, Device contains one ISO MOSFET

controller for power on sequence of step-up converter. The

RT4841 has a wide input voltage range from 8.6V to 15.9V

and device has 5A (min.) switching current capability. The

RT4841 is available in a WQFN-20L 4x4 package.

Features

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8.6V to 15.9V Input Supply Voltage

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A Synchronous Boost Converter

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Isolation Switch Controller

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VIN Under Voltage Lockout

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Fixed 500kHz Switching Frequency

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Over-Temperature Protection

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Cycle by Cycle OCP Protection

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Thin 20-Lead WQFN Package

RT4841

Package Type

QW : WQFN-20L 4x4 (W-Type)

(Exposed Pad-Option 1)

Lead Plating System

G : Green (Halogen Free and Pb Free)

72=YM

DNN

72= : Product Code

YMDNN : Date Code

GND

GND

NC

SWO

VIN

BT

PGND

SW

SWO

PGND

1

2

3

4

67

8

9

15

14

13

12

17

20

18

19

21

PGND

5

11

10

16