MIC38HC42-1BM

更新时间： 2024-02-19 14:31:32

品牌	Logo	应用领域
麦瑞 - MICREL		开关光电二极管信息通信管理控制器
页数	文件大小	规格书
8页	76K
描述
BiCMOS 1A Current-Mode PWM Controllers

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中文翻译

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技术参数
数据手册

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MIC38HC42-1BM 技术参数

是否无铅：	不含铅	生命周期：	Active
包装说明：	LSOP,	Reach Compliance Code：	compliant
Factory Lead Time：	20 weeks	风险等级：	5.76
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：	18 V
最小输入电压：	12 V	标称输入电压：	15 V
JESD-30 代码：	R-PDSO-G14	长度：	8.65 mm
功能数量：	1	端子数量：	14
最高工作温度：	85 °C	最低工作温度：	-40 °C
标称输出电压：	5 V	封装主体材料：	PLASTIC/EPOXY
封装代码：	LSOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, LOW PROFILE	座面最大高度：	1.6 mm
表面贴装：	YES	切换器配置：	BUCK-BOOST
技术：	BICMOS	温度等级：	INDUSTRIAL
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	宽度：	3.9 mm
Base Number Matches：	1

MIC38HC42-1BM 数据手册

MIC38HC42/3/4/5

Micrel

MIC38HC42/3/4/5

BiCMOS 1A Current-Mode PWM Controllers

General Description

Features

The MIC38HC4x family are fixed frequency current-mode

PWM controllers with 1A drive current capability. Micrel’s

BiCMOS devices are pin-compatible with 384x bipolar de-

vices. Their high output drive, with fast rise and fall times,

combined with low startup current make it an ideal PWM

controller where high efficiency is required.

• Fast 20ns output rise and 15ns output fall times

• –40°C to +85°C temperature range

exceeds UC284x specifications

• High-performance, low-power BiCMOS Process

• Ultralow start-up current (50µA typical)

• Low operating current (4mA typical)

• High output drive (1A peak current, HC version)

• CMOS outputs with rail-to-rail swing

• Current-mode operation up to 500kHz

• Trimmed 5V bandgap reference

Undervoltagelockoutcircuitryallowsthe’42and’44versions

to start up at 14.5V and operate down to 9V, and the ’43 and

’45 versions start at 8.4V with operation down to 7.6V. All

versions operate up to 20V.

• Pin-for-pin compatible with UC3842/3843/3844/3845(A)

• Trimmed oscillator discharge current

• UVLO with hysteresis

When compared to bipolar UC384x devices operating from a

15V supply, start-up current has been reduced to 50µA

typical and operating current has been reduced to 4.0 mA

typical. Decreased output rise and fall times drive larger

MOSFETs, and rail-to-rail output capability increases effi-

ciency, especiallyatlowersupplyvoltages. TheMIC38HC4x

also features a trimmed oscillator discharge current and

bandgap reference.

• Low cross-conduction currents

Applications

• Current-mode, off-line, switched-mode power supplies

• Current-mode, dc-to-dc converters.

• Step-down “buck” regulators

• Step-up “boost” regulators

• Flyback, isolated regulators

• Forward converters

MIC38HC4x-1 is available in 14-pin plastic DIP and SOIC

packages. 8-pin devices feature small size, while 14-pin

devices separate the analog and power connections for

improved performance and power dissipation.

• Synchronous FET converters

Functional Diagram

VDD

7 (12)

35V

Reference

UVLO

VREF

(VD)

8 (14)

(11)

†

‡

Oscillator

RT/CT

OUT

4 (7)

6 (10)

2 (3)

(PGND)

(8)

2.5V

COMP GND*(AGND) ISNS

1 (1)

(9)

3 (5)

( ) pins are on MIC38HC4x-1 (14-lead) versions only

* MIC38HC4x (8-lead) versions only

†

MIC38HC42, MIC38HC43 (96% max. duty cycle) versions only

MIC38HC44, MIC38HC45 (50% max. duty cycle) versions only

‡

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

August 2000

MIC38HC42/3/4/5

12 3 4 5 6 7 8

中文翻译

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与MIC38HC42-1BM相关器件

型号	品牌	获取价格	描述	数据表
MIC38HC42-1BMT&R	MICROCHIP	获取价格	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BICMOS, PDSO14, 0.150 I
MIC38HC42-1BMT&R	MICREL	获取价格	暂无描述
MIC38HC42-1BN	MICROCHIP	获取价格	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BICMOS, PDIP14, PLASTIC
MIC38HC42-1BN	MICREL	获取价格	BiCMOS 1A Current-Mode PWM Controllers
MIC38HC42-1YM	MICREL	获取价格	BiCMOS 1A Current-Mode PWM Controllers
MIC38HC42-1YM-TR	MICROCHIP	获取价格	IC REG CTRLR PWM CM 14-SOIC
MIC38HC42BM	MICREL	获取价格	BiCMOS 1A Current-Mode PWM Controllers
MIC38HC42BMT&R	MICROCHIP	获取价格	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BICMOS, PDSO8, 0.150 IN
MIC38HC42BN	MICREL	获取价格	BiCMOS 1A Current-Mode PWM Controllers
MIC38HC42YM	MICREL	获取价格	BiCMOS 1A Current-Mode PWM Controllers

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