SG2845DM

更新时间： 2024-11-22 22:43:15

品牌	Logo	应用领域
美高森美 - MICROSEMI		稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数	文件大小	规格书
12页	216K
描述
CURRENT MODE PWM CONTROLLER

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技术参数
数据手册
替代型号

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SG2845DM 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	ROHS COMPLIANT, PLASTIC, SOIC-8	针数：	8
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	7.9
Is Samacsys：	N	模拟集成电路 - 其他类型：	SWITCHING CONTROLLER
控制模式：	CURRENT-MODE	控制技术：	PULSE WIDTH MODULATION
最大输入电压：	25 V	最小输入电压：	8.2 V
标称输入电压：	15 V	JESD-30 代码：	R-PDSO-G8
JESD-609代码：	e3	长度：	4.915 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	8	最高工作温度：	85 °C
最低工作温度：	-25 °C	最大输出电流：	1 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装等效代码：	SOP8,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	1.75 mm
子类别：	Switching Regulator or Controllers	表面贴装：	YES
切换器配置：	SINGLE	最大切换频率：	500 kHz
技术：	BIPOLAR	温度等级：	COMMERCIAL EXTENDED
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	3.875 mm
Base Number Matches：	1

SG2845DM 数据手册

LIN DOC #: 1844

SG1844/SG1845 Series

U R R E N T M O D E P W M C O N T R O L L E R

T H E I N F I N I T E P O W E R O F I N N O V A T I O N

P R O D U C T I O N D A T A S H E E T

DESCRIPTION

KEY FEATURES

■ OPTIMIZED FOR OFF-LINE CONTROL

■ LOW START-UP CURRENT (<1mA)

■ AUTOMATIC FEED FORWARD

COMPENSATION

■ TRIMMED OSCILLATOR DISCHARGE

The SG1844/45 family of control ICs

provides all the necessary features to

implement off-line fixed frequency,

current-mode switching power supplies

with a minimum number of external

components. Current-mode architecture

demonstrates improved line regulation,

improved load regulation, pulse-by-

pulse current limiting and inherent

protection of the power supply output

switch.

The bandgap reference is trimmed to

1ꢀ over temperature. Oscillator

discharge current is trimmed to less than

1ꢁꢀ. The SG1844/45 has under-

voltage lockout, current-limiting circuitry

and start-up current of less than 1mA.

The totem-pole output is optimized to

drive the gate of a power MOSFET. The

output is low in the off state to provide

direct interface to an N-channel device.

Both operate up to a maximum duty

cycle range of zero to <5ꢁꢀ due to an

internal toggle flip-flop which blanks the

output off every other clock cycle.

The SG1844/45 is specified for

operation over the full military ambient

temperature range of -55°C to 125°C.

The SG2844/45 is specified for the

industrial range of -25°C to 85°C, and

the SG3844/45 is designed for the

commercial range of ꢁ°C to 7ꢁ°C.

CURRENT

■ PULSE-BY-PULSE CURRENT LIMITING

■ ENHANCED LOAD RESPONSE

CHARACTERISTICS

■ UNDER-VOLTAGE LOCKOUT WITH 6V

HYSTERESIS (SG1844 only)

■ DOUBLE PULSE SUPPRESSION

■ HIGH-CURRENT TOTEM-POLE OUTPUT

■ INTERNALLY TRIMMED BANDGAP

REFERENCE

■ 500kHz OPERATION

■ UNDERVOLTAGE LOCKOUT

SG1844 - 16 volts

SG1845 - 8.4 volts

PRODUCT HIGHLIGHT

■ LOW SHOOT-THROUGH CURRENT <75mA

OVER TEMPERATURE

TYPICAL APPLICATION OF SG3844 IN A FLYBACK CONVERTER

HIGH RELIABILITY FEATURES

R_ST

■ AVAILABLE TO MIL-STD-883B

■

LINFINITY LEVEL "S" PROCESSING AVAILABLE

I_ST

INPUT

V_CC

SG3844

PACKAGE ORDER INFORMATION

Plastic DIP

8-pin

Plastic DIP

14-pin

Plastic SOIC

8-pin

Plastic SOIC

14-pin

Ceramic DIP

8-pin

Ceramic DIP

14-pin

Cer. Flatpack Ceramic LCC

1ꢁ-pin 2ꢁ-pin

T_A(°C)

0 to 70

SG3844M

SG3844N

SG3844DM

SG3844D

SG3844Y

SG3845Y

SG2844Y

SG2845Y

SG1844Y

SG1845Y

SG3844J

SG3845J

SG2844J

SG2845J

SG1844J

SG1845J

—

SG3845M

SG3845N

SG3845DM

SG3845D

SG2844M

SG2844N

SG2844DM

SG2844D

—

-25 to 85

-55 to 125

MIL-STD/883

DESC

SG2845M

SG2845N

SG2845DM

SG2845D

—

SG1844L

SG1845L

SG1844Y/883B SG1844J/883B

SG1845Y/883B SG1845J/883B

SG1844L/883B

SG1845L/883B

SG1844Y/DESC SG1844J/DESC SG1844F/DESC SG1844L/DESC

SG1845Y/DESC SG1845J/DESC SG1845F/DESC SG1845L/DESC

Note: All surface-mount packages are available in Tape & Reel.

F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1

Rev. 1.4 4/00

11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841

12 3 4 5 6 7...12

中文翻译

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SG2845DM 替代型号

型号	品牌	替代类型	描述	数据表
SG2845M	MICROSEMI	完全替代	CURRENT MODE PWM CONTROLLER
SG3845M	MICROSEMI	完全替代	CURRENT MODE PWM CONTROLLER
SG3845DM	MICROSEMI	完全替代	CURRENT MODE PWM CONTROLLER

与SG2845DM相关器件

型号	品牌	获取价格	描述	数据表
SG2845DMT	MICROSEMI	获取价格	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, PLASTIC
SG2845DM-TR	MICROSEMI	获取价格	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, ROHS CO
SG2845DT	MICROSEMI	获取价格	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14, PLASTI
SG2845D-TR	MICROSEMI	获取价格	暂无描述
SG2845J	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER
SG2845M	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER
SG2845N	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER
SG2845Y	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER
SG2846	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER
SG2846	MICROCHIP	获取价格	The SG1846 family of control ICs provides the required features to implement Fixed Frequen

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