Datasheet > LT1245IS8

LT1245IS8

更新时间： 2024-01-10 21:23:59

品牌	Logo	应用领域
凌特 - Linear		开关光电二极管
页数	文件大小	规格书
16页	284K
描述
Switching Controller, Current-mode, 500kHz Switching Freq-Max, PDSO8

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技术参数
数据手册

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LT1245IS8 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	SOP,
针数：	8	Reach Compliance Code：	compliant
风险等级：	5.14	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：	4.9 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	8	最大输出电流：	1 A
标称输出电压：	5 V	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	250
认证状态：	Not Qualified	座面最大高度：	1.75 mm
表面贴装：	YES	切换器配置：	SINGLE
最大切换频率：	500 kHz	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：	NOT SPECIFIED
宽度：	3.9 mm	Base Number Matches：	1

LT1245IS8 数据手册

LT1241 Series

High Speed Current Mode

Pulse Width Modulators

DESCRIPTIO

EATURE

Low Start-Up Current: < 250µA

50ns Current Sense Delay

Current Mode Operation: To 500kHz

Pin Compatible with UC1842 Series

Undervoltage Lockout with Hysteresis

No Cross-Conduction Current

The LT^®1241 series devices are 8-pin, fixed frequency,

currentmode,pulsewidthmodulators.Theyareimproved

plugcompatibleversionsoftheindustrystandardUC1842

series. These devices have both improved speed and

lower quiescent current. The LT1241 series is optimized

for off-line and DC/DC converter applications. They con-

tain a temperature-compensated reference, high gain er-

ror amplifier, current sensing comparator and a high

current totem pole output stage ideally suited to driving

power MOSFETs. Start-up current has been reduced to

less than 250µA. Cross-conduction current spikes in

the output stage have been eliminated, making 500kHz

operation practical. Several new features have been incor-

porated. Leading edge blanking has been added to the

current sense comparator. Trims have been added to the

oscillator circuit for both frequency and sink current, and

both of these parameters are tightly specified. The output

stage is clamped to a maximum V_OUTof 18V in the

on state. The output and the reference output are actively

pulled low during undervoltage lockout.

■

Trimmed Bandgap Reference

1A Totem Pole Output

Trimmed Oscillator Frequency and Sink Current

Active Pull-Down on Reference and Output During

Undervoltage Lockout

■

High Level Output Clamp: 18V

^{Current Sense Le}O ^adU ^{ing Edge Blanking}

PPLICATI

■

Off-Line Converters

DC/DC Converters

■

, LTC and LT are registered trademarks of Linear Technology Corporation.

BLOCK DIAGRA

LOCKOUT

REFERENCE ENABLE

REFERENCE PULL-DOWN

5V REF

MAIN BIAS

REF

OUTPUT

PULL-DOWN

OSCILLATOR

R /C

OUTPUT

GND

5.6V

COMP

1mA

–

BLANKING

1.5V

–

2.5V

18V

SENSE

–

1241 BD01

12 3 4 5 6 7...16

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与LT1245IS8相关器件

型号	品牌	描述	获取价格	数据表
LT1245IS8#PBF	Linear	LT1245 - High Speed Current Mode Pulse Width Modulators; Package: SO; Pins: 8; Temperature	获取价格
LT1245IS8#TRPBF	Linear	LT1245 - High Speed Current Mode Pulse Width Modulators; Package: SO; Pins: 8; Temperature	获取价格
LT1245MJ8	Linear	IC 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CDIP8, 0.300 INCH, HERMETIC SEALE	获取价格
LT1245MJ8#PBF	Linear	IC,SMPS CONTROLLER,CURRENT-MODE,BIPOLAR,DIP,8PIN,CERAMIC	获取价格
LT1245MJ8/883B	Linear	IC 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CDIP8, CERDIP-8, Switching Regula	获取价格
LT1245MJ8/883C	Linear	IC IC,SMPS CONTROLLER,CURRENT-MODE,BIPOLAR,DIP,8PIN,CERAMIC, Switching Regulator or Contro	获取价格

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