Datasheet > SG6842JLSZ

SG6842JLSZ

更新时间： 2024-10-28 12:27:43

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		控制器
页数	文件大小	规格书
13页	1264K
描述
Highly-Integrated Green-Mode PWM Controller

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SG6842JLSZ 数据手册

Product Specification

Highly-Integrated Green-Mode PWM Controller

SG6842J

frequency at light-load conditions. To avoid

acoustic-noise problem, the minimum PWM frequency

set above 20kHz. This green-mode function enables the

power supply to easily meet international power

conservation requirements. To further reduce power

consumption, SG6842J is manufactured by using the

BiCMOS process. This allows the lowest start-up current

around 8uA, and the operating current is only 4mA. As a

result, large start-up resistance can be used.

FEATURES

ꢀ

Green-mode PWM Controller

Low Start-Up Current (8uA)

Low Operating Current (4mA)

Programmable PWM frequency with Jittering

Peak-current-mode Operation

Cycle-by-Cycle Current Limiting

Synchronized Slope Compensation

Leading-Edge Blanking

Constant Output Power Limit (Full AC Input Range)

VDD Over Voltage Protection (OVP)

Programmable Over Temperature Protection (OTP)

Internal Latch Circuit (OTP, OVP) Options

Internal Open-loop Protection

SG6842J integrates frequency jittering function

internally. The frequency jittering function helps reduce

EMI emission of a power supply with minimum line

filters. Also, its built-in synchronized slope compensation

achieves stable peak-current-mode control. The

proprietary internal line compensation ensures constant

output power limit over a wide AC input voltages, from

90VAC to 264VAC.

APPLICATIONS

General-purpose switch mode power supplies and

flyback power converters, including:

SG6842J provides many protection functions. In

addition to cycle-by-cycle current limiting, the internal

open-loop protection circuit ensures safety should an open

loop or output short-circuit failure occurs. PWM output is

disabled till V_DDdrops below the UVLO lower limit.

Then, the controller starts up again. As long as V_DD

exceeds about 24V, the internal OVP circuit is triggered.

An external NTC thermistor can be applied for

over-temperature protection. For OVP and OTP, the

protection mode can be chosen to be latch off or auto

recovery.

ꢀ

Notebook Power Adapters

Open-Frame SMPS

DESCRIPTION

The highly integrated SG6842J series of PWM

controllers provides several features to enhance the

performance of flyback converters.

To minimize standby power consumption, a

proprietary green-mode function provides off-time

modulation to continuously decrease the switching

SG6842J is available in an 8-pin DIP or SOP

package.

TYPICAL APPLICATION

- 1 -

www.sg.com.tw

Feb. 13, 2006

Version 1.4(IAO33.0015.B4)

12 3 4 5 6 7...13

中文翻译

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与SG6842JLSZ相关器件

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SG6846	FAIRCHILD	获取价格	Control a Flyback Power Supply with Surge Current Output
SG6846A	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846A_08	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846ACSY	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846ACSZ	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846ALSY	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846ALSZ	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846B	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846BCSY	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846BCSZ	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller

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