Datasheet > RT7339P

RT7339P

更新时间： 2024-09-22 14:31:27

品牌	Logo	应用领域
立锜 - RICHTEK		功率因数校正
页数	文件大小	规格书
18页	1048K
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RT7339P 技术参数

Status：	Active	Supply Voltage (min) (V)：	-0.3
Supply Voltage (max) (V)：	40	Vin (min) (V)：
Vin (max) (V)：		Topology：	Flyback;PSR
输出：	C.V.	MOSFET Integrated：	No
PFC：	Y	Current Sense Threshold (mV)：	600
Dimming Control：		Features：	COT Control;Cycle-by-Cycle Current Limit;Fast Transient Response;OCP;OVP;SCP;Thermal Protection;UVP
Package Type：	SOT-26

RT7339P 数据手册

RT7339P

Active-PFC Constant-Voltage Controller with Primary-Side

Regulation

General Description

Features

 Tight Voltage Regulation

The RT7339P is a constant voltage controller with the

active Power Factor Correction (PFC), which is

designed to meet the line current harmonic regulations.

It drives the converter in Quasi-Resonant (QR) mode to

achieve higher efficiency. By using the Primary-Side

Regulation (PSR), the RT7339P controls the output

voltage accurately without a shunt regulator and an

opto-coupler at the secondary side, reducing the

external component counts, the costs, and the volume

of the driver board.

 Power Factor Correction

 THD Optimization (THD < 10%)

 Quasi-Resonant (QR) Operation

 Fast Startup

 Fast Dynamic Response

 Ultra-Low Standby Power Consumption

 Soft Drive for the Better EMI Performance

 Wide Supply Voltage Range (Up to 34V)

 Maximum Frequency Limitation (117kHz)

 Multiple Protection Features

The RT7339P is compatible with the external depletion

N-MOSFET to achieve fast startup and ultra-low

standby power consumption.

 Output Over Voltage Protection

 Output Short-Circuit Protection

 Input Under / Over Voltage Protection

 Output Diode Short-Circuit Protection

 VDD Over Voltage Protection

The totem-pole gate driver with the 400mA sourcing

current and 500mA sinking current provides the

powerful driving capability for a power MOSFET to

improve the conversion efficiency. In addition, the

built-in soft drive at the turn-on transition is better for

the EMI improvement.

 VDD Under Voltage Lockout (UVLO)

 External / Internal OTP

 Cycle-By-Cycle High / Low Line Current

The RT7339P integrates comprehensive protection

functions for robust designs, including output over

voltage protection, output short-circuit protection,

output diode short-circuit protection, VDD under

voltage lockout (UVLO), VDD over voltage protection

(VDD OVP), input under / over voltage protection,

external / internal over temperature protection (OTP),

and cycle-by-cycle high/low line current limitation.

Limitation (0.5V/0.6V typ.)

Applications

 LED Lighting

 AC-DC Adapter/Charger

Simplified Application Circuit

With Depletion N-MOS Application

OUT

Fuse

TX1

OUT

Depletion

NMOS

OUT

AUX

VDD

RT7339P

COMP

GND

GATE

DMAG1

COMP

DMAG

DMAG2

is a registered trademark of Richtek Technology Corporation.

DS7339P-03

August 2019

www.richtek.com

12 3 4 5 6 7...18

中文翻译

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