Datasheet > SG6846CDZ

SG6846CDZ

更新时间： 2024-10-27 21:54:23

品牌	Logo	应用领域
其他 - ETC		控制器
页数	文件大小	规格书
14页	3227K
描述
Highly-Integrated Green-Mode PWM Controller

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SG6846CDZ 数据手册

Product Specification

Highly-Integrated Green-Mode PWM Controller

SG6846

the switching frequency under light-load conditions.

Under zero-load conditions, the power supply enters

burst-mode. This completely shuts off PWM output. The

output restarts just before the supply voltage drops below

the UVLO lower limit. This green-mode function enables

power supplies to easily meet international power

conservation requirements.

FEATURES

ꢀ

Two-level OCP with 96mS delay time

Peak-current-mode operation with cycle-by-cycle

current limiting

ꢀ

PWM frequency continuously decreasing w/ burst

mode at light loads

ꢀ

Low start-up current (8uA)

Low operating current (3.7mA)

The SG6846 is especially designed for SMPS with

surge-current output. It is incorporated with a two-level

OCP function. Besides the cycle-by-cycle current limiting,

if the switching current is higher than 2/3 of the

peak-current threshold for a delay time, over-current

protection will be activated such that the SG6846 will be

totally shutdown. Other protection functions include: AC

input brownout protection with hysteresis, and VDD

over-voltage protection. For over-temperature protection,

an external NTC thermistor can be applied to sense the

ambient temperature. When OCP, VDD OVP, or OTP are

activated, an internal latch circuit is used to latch-off the

controller. The latch will reset when the VDD supply is

removed.

VDD over-voltage protection (OVP)

AC input brownout protection with hysteresis

Programmable over-temperature protection (OTP)

Constant power limit over universal AC input range

Internal latch circuit for OTP, OVP, OCP

Very few external components

APPLICATIONS

General-purpose switch mode power supplies and

flyback power converters, including:

ꢀ

Power adapters

Open-frame SMPS

Specifically fit for SMPS with surge-current output,

such as for printers, scanners, motor drivers, etc.

Other features of this controller include: Built-in

synchronized slope compensation, proprietary internal

compensation for constant output power limit over

universal AC input range. Also, the gate output is clamped

at 18V to protect the external MOSFET from over-voltage

damage.

DESCRIPTION

The highly integrated SG6846 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 SG6846 series controllers are available in both

8-pin DIP and SO packages.

TYPICAL APPLICATION

- 1 -

www.sg.com.tw

Sep. 30, 2004

Version 1.0(IAO33.0008.B0)

12 3 4 5 6 7...14

中文翻译

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与SG6846CDZ相关器件

型号	品牌	获取价格	描述	数据表
SG6846CLDZ	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846CLSZ	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846CS	ETC	获取价格	Highly-Integrated Green-Mode PWM Controller
SG6846CSZ	ETC	获取价格	Highly-Integrated Green-Mode PWM Controller
SG6846G	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846G_09	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846GLSY	FAIRCHILD	获取价格	Highly Integrated Green-Mode PWM Controller
SG6846LD	ETC	获取价格	Highly-Integrated Green-Mode PWM Controller
SG6846LDZ	ROCHESTER	获取价格	SWITCHING CONTROLLER, 70kHz SWITCHING FREQ-MAX, PDIP8, ROHS COMPLIANT, MS-001BA, DIP-8
SG6846LS	ETC	获取价格	Highly-Integrated Green-Mode PWM Controller

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