Datasheet > RS2042

RS2042

更新时间： 2024-11-16 03:35:55

品牌	Logo	应用领域
ORISTER		控制器
页数	文件大小	规格书
8页	233K
描述
Green-Power PWM Controller with Freq,. Jittering

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RS2042 数据手册

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RS2042

Green-Power PWM Controller with Freq. Jittering

Description

The RS2042 is a low startup current, low cost, current mode PWM controller with Green-Power & burst-mode power-saving

operation. The integrated functions such as the leading-edge blanking of the current sensing, internal slope compensation

provide the users a high efficiency, low external component counts, and low cost solution for AC/DC power applications. The

special Green-Power function provides off-time modulation to linearly decrease the switching frequency under light-load

conditions. And under zero-load conditions, the power supply enters burst-mode to further reduce power consumption by

shutting off PWM output. When the output of power supply is short or over loaded, the FB voltage will increase, and if the FB

voltage is higher than 5.2V for longer than 56msec the PWM output will be turned off. A external NTC resistor connected from

pin RT to ground can be applied to over-temperature protection. Pulse by pulse current limit ensures a constant output current

even under short circuit. PWM output will be disabled as long as VDD exceeds a threshold. When internal latch circuit is used to

latch-off the controller, the latch will be reset when the power supply VDD is disabled.

Features

ꢀ

Low Cost, Green-Power Burst-Mode PWM

Very Low Start-up Current (about 7.5μA)

Low Operating Current (about 3.0mA)

Current Mode Operation

ꢀ

VDD over voltage protect 25.5V

Cycle-by-cycle current limiting

Sense Fault Protection

Output SCP (Short circuit Protection)

Built-in Synchronized Slope Compensation

Leading-edge blanking on Sense input

Programmable PWM Frequency

High-Voltage CMOS Process with ESD

DIP-8 & SOP-8 Pb-Free Package

Compatible with SG6842J&LD7552&OB2269 & SG6841

& OB2268

Under Voltage Lockout (UVLO)

VDD Over Voltage Protection (OVP)

Programmable over-temperature protection

Internal Latch Circuit (OTP, OVP)

Built-in soft start with 1ms

Built-in Frequency jitter for better EMI Signature

Soft Clamped gate output voltage 16.5V

Applications

ꢀ

Power Adaptor

Battery Charger Adapter

Open Frame Switching Power Supply

LCD Monitor

Pin Configurations

Name

GND

Description

GND Pin

Voltage feedback pin. The PWM duty cycle is determined by FB and Sense.

This pin is pulled high to the rectified line input through a large resistor for start-up.

This pin is also used to detect line voltage to compensate for constant output

power limit for universal AC input.

GATE

GND

VIN

VDD

SENSE

By connecting a resistor to ground to set the switching freq.. Increasing the

resistor will reduce the switching freq..

An NTC resistor is connected from this pin to ground for over-temperature

protection.

VIN

Current sense pin, The sensed voltage is used for current-mode control and pulse-

by-pulse current limiting.

Power supply voltage pin.

SENSE

VDD

Gate drive output to drive the external MOSFET.A soft driving waveform is

implemented to improve EMI.

GATE

DS-RS2042-01 May, 2007

www.Orister.com

12 3 4 5 6 7 8

中文翻译

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与RS2042相关器件

型号	品牌	获取价格	描述	数据表
RS2042_08	ORISTER	获取价格	Green-Power PWM Controller with Freq. Jiggling
RS2042P	ORISTER	获取价格	Green-Power PWM Controller with Freq,. Jittering
RS2042S	ORISTER	获取价格	Green-Power PWM Controller with Freq,. Jittering
RS2-04-G	ADAM-TECH	获取价格	Board Connector, 4 Contact(s), 2 Row(s), Female, Straight, 0.1 inch Pitch, Solder Terminal
RS204-G	COMCHIP	获取价格	Silicon Bridge Rectifiers
RS2-04-G-.315	ADAM-TECH	获取价格	Board Connector, 4 Contact(s), 2 Row(s), Male, Straight, 0.1 inch Pitch, Wire Wrap Termina
RS204L	RECTRON	获取价格	SINGLE-PHASE SILICON BRIDGE RECTIFIER (VOLTAGE RANGE 50 to 1000 Volts CURRENT 2.0 Ampere)
RS204L	WILLAS	获取价格	SINGLE-PHASE SILICON BRIDGE RECTIFIER VOLTAGE RANGE 50 to 1000 Volts CURRENT 2.0 Ampere
RS204L	LGE	获取价格	Silicon Bridge Rectifiers
RS204L	BL Galaxy Electrical	获取价格	SILICON BRIDGE RECTIFIERS

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