UC3842D

更新时间： 2024-01-13 15:22:16

品牌	Logo	应用领域
恩智浦 - NXP		控制器
页数	文件大小	规格书
8页	75K
描述
Current-mode PWM controller

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中文翻译

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技术参数
数据手册

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UC3842D 技术参数

生命周期：	Obsolete	Reach Compliance Code：	unknown
风险等级：	5.83	Is Samacsys：	N
控制模式：	CURRENT-MODE	JESD-30 代码：	R-XDFP-F14
端子数量：	14	最高工作温度：	70 °C
最低工作温度：		最大输出电流：	0.2 A
封装主体材料：	CERAMIC	封装代码：	DFP
封装等效代码：	FL14,.25	封装形状：	RECTANGULAR
封装形式：	FLATPACK	认证状态：	Not Qualified
子类别：	Switching Regulator or Controllers	表面贴装：	YES
最大切换频率：	500 kHz	技术：	BIPOLAR
温度等级：	COMMERCIAL	端子形式：	FLAT
端子节距：	1.27 mm	端子位置：	DUAL
Base Number Matches：	1

UC3842D 数据手册

Philips Semiconductors Linear Products

Product specification

Current-mode PWM controller

UC3842

DESCRIPTION

PIN CONFIGURATIONS

The UC3842 is available in an 8-Pin mini-DIP the necessary

features to implement off-line, fixed-frequency current-mode control

schemes with a minimal external parts count. This technique results

in improved line regulation, enhanced load response characteristics,

and a simpler, easier to design control loop. Topological advantages

include inherent pulse-by-pulse current limiting.

N Package

COMP

REF

OUTPUT

GROUND

SENSE

Protection circuitry includes built-in undervoltage lock-out and

current limiting. Other features include fully-latched operation, a 1%

trimmed bandgap reference, and start-up current less than 1mA.

TOP VIEW

These devices feature a totem-pole output designed to source and

sink high peak current from a capacitive load, such as the gate of a

power MOSFET. Consistent with N-channel power devices, the

output is low in the OFF-state.

D Package

COMP

REF

FEATURES

• Low start-up current (≤1mA)

• Automatic feed-forward compensation

• Pulse-by-pulse current limiting

OUTPUT

SENSE

GROUND

POWER GROUND

• Enhanced load response characteristics

• Undervoltage lock-out with hysteresis

• Double pulse suppression

TOP VIEW

• High current totem-pole output

APPLICATIONS

• Internally-trimmed bandgap reference

• 400kHz operation, guaranteed min

• Off-line switched mode power supplies

• DC-to-DC converters UC3842

BLOCK DIAGRAM

7(11)

(12)7

UVLO

34V

REF

8(14)

5.0V

50mA

REF

(9)5

(7)4

S/R

GND

16V

2.5V

INTERNAL

BIAS

OSC

6(10)

OUTPUT

ERROR

AMP

–

PWM

LATCH

(3)2

(1)1

(5)3

CURRENT

SENSE

COMP

COMPARATOR

CURRENT

SENSE

5(8)

NOTE:

Pin numbers in parentheses refer to the D package.

1100

August 31, 1994

853-0614 13721

12 3 4 5 6 7 8

中文翻译

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与UC3842D相关器件

型号	品牌	获取价格	描述	数据表
UC3842D013TR	STMICROELECTRONICS	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO14, SO-14
UC3842D1	FAIRCHILD	获取价格	SMPS Controller
UC3842D1X	FAIRCHILD	获取价格	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, SOIC-8
UC3842D8	TI	获取价格	Current Mode PWM Controller
UC3842D8	ROCHESTER	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-
UC3842D-8	TI	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-
UC3842D-8	ROCHESTER	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-
UC3842D8G4	TI	获取价格	CURRENT MODE PWM CONTROLLER
UC3842D8TR	TI	获取价格	Current Mode PWM Controller
UC3842D8TR	ROCHESTER	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-

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