Datasheet > ContactFactory

ContactFactory

更新时间： 2024-11-27 12:55:15

品牌	Logo	应用领域
麦瑞 - MICREL		控制器
页数	文件大小	规格书
11页	354K
描述
BiCMOS Current-Mode PWM Controllers

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

ContactFactory 数据手册

MIC38C42/3/4/5

Micrel, Inc.

MIC38C42/3/4/5

BiCMOS Current-Mode PWM Controllers

General Description

Features

The MIC38C4x are ﬁxed frequency, high performance, cur-

rent-mode PWM controllers. Micrel’s BiCMOS devices are

pin compatible with 384x bipolar devices but feature several

improvements.

• Fast 40ns output rise and 30ns output fall times

• –40°C to +85°C temperature range

meets UC284x speciﬁcations

• High-performance, low-power BiCMOS Process

• Ultralow start-up current (50µA typical)

• Low operating current (4mA typical)

• CMOS outputs with rail-to-rail swing

• ≥ 500kHz current-mode operation

• 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.

When compared to bipolar 384x devices operating from a

15Vsupply,start-upcurrenthasbeenreducedto50µAtypical

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 efﬁciency, espe-

cially at lower supply voltages. The MIC38C4x also features

a trimmed oscillator discharge current and bandgap refer-

ence.

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

• Trimmed oscillator discharge current

• UVLO with hysteresis

• 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

The MIC38C4x denotes 8-pin plastic DIP, SOIC, and MSOP

packages. MIC384Cx-1 denotes 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 perfomance and power dissipation.

• Synchronous FET converters

For fast rise and fall times and higher output drive, refer to

the MIC38HC4x.

Functional Diagram

VDD

7 (12)

35V

Reference

(VD)

UVLO

VREF

(11)

8 (14)

†

‡

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 MIC38C4x-1 (14-lead) versions only

MIC38C4x, (8-lead) versions only

†

MIC38C42, MIC38C43 (96% max. duty cycle) versions only

‡

MIC38C44, MIC38C45 (50% max. duty cycle) versions only

Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

M9999-091107

September 2007

12 3 4 5 6 7...11

中文翻译

下载PDF

与ContactFactory相关器件

型号	品牌	获取价格	描述	数据表
CONT-GTC16S-2-A528	JAE	获取价格	CLIP - SYNTHETIC RESIN
CONT-GTC16S-A528	JAE	获取价格	CLIP - SYNTHETIC RESIN
CONT-JA16S	JAE	获取价格	CONT-JA16S
CONT-JL05-08P-C1	JAE	获取价格	PIN CONTACT
CONT-JL05-08P-C2	JAE	获取价格	PIN CONTACT
CONT-JL05-08S-C1	JAE	获取价格	SPRING SOCKET CONTACT
CONT-JL05-08S-C2	JAE	获取价格	SPRING SOCKET CONTACT
CONT-JL05-12P-C1	JAE	获取价格	PIN CONTACT
CONT-JL05-12P-C1-10	JAE	获取价格	Connector Accessory
CONT-JL05-12S-C1	JAE	获取价格	SPRING SOCKET CONTACT

与ContactFactory相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

46
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

35
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

64
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

61

产品中心

服务支持

精选活动

关于我们

帮助中心

ContactFactory

ContactFactory 数据手册

与ContactFactory相关器件

与ContactFactory相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

ContactFactory

ContactFactory 数据手册

与ContactFactory相关器件

与ContactFactory相关文章

您还可以找

您在本页遇到什么问题？