Datasheet > 电源电路 > 开关式稳压器或控制器> UC1874L-2

UC1874L-2

更新时间： 2024-11-13 22:37:03

品牌	Logo	应用领域
德州仪器 - TI		稳压器开关式稳压器或控制器电源电路开关式控制器
页数	文件大小	规格书
10页	352K
描述
High Efficiency, Synchronous, Step-down Buck 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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UC1874L-2 技术参数

生命周期：	Obsolete	包装说明：	CERAMIC, LCC-28
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.77
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：	24 V	最小输入电压：	12 V
标称输入电压：	12 V	JESD-30 代码：	S-CQCC-N28
长度：	11.43 mm	功能数量：	1
端子数量：	28	最高工作温度：	125 °C
最低工作温度：	-55 °C	最大输出电流：	1 A
封装主体材料：	CERAMIC, METAL-SEALED COFIRED	封装代码：	QCCN
封装等效代码：	LCC28,.45SQ	封装形状：	SQUARE
封装形式：	CHIP CARRIER	认证状态：	Not Qualified
座面最大高度：	2.54 mm	子类别：	Switching Regulator or Controllers
表面贴装：	YES	切换器配置：	PUSH-PULL
最大切换频率：	300 kHz	技术：	BIPOLAR
温度等级：	MILITARY	端子形式：	NO LEAD
端子节距：	1.27 mm	端子位置：	QUAD
宽度：	11.43 mm	Base Number Matches：	1

UC1874L-2 数据手册

UC1874-1,-2

UC2874-1,-2

UC3874-1,-2

High Efficiency, Synchronous, Step-down (Buck) Controllers

FEATURES

DESCRIPTION

•

Operation to 36V Input Voltage

The UC3874 family of synchronous step-down (Buck) regulators provides

high efficiency power conversion from an input voltage range of 4.5 to 36

volts. The UC3874 is tailored for battery powered applications such as

laptop computers, consumer products, communications systems, and

aerospace which demand high performance and long battery life. The

synchronous regulator replaces the catch diode in the standard buck

regulator with a low Rds(on) N-channel MOSFET switch allowing for

significant efficiency improvements. The high side N-channel MOSFET

switch is driven out of phase from the low side N-channel MOSFET switch

by an on-chip bootstrap circuit which requires only a single external

capacitor to develop the regulated gate drive. Fixed frequency, average

current mode control provides the regulator with inherent slope

compensation, tight regulation of the output voltage, and superior load and

line transient response. Switching frequencies up to 300kHz are possible.

•

Fixed Frequency Average Current

Mode Control

•

Standby Mode for Improved

Efficiency at Light Load

Drives External N-Channel

MOSFETs for Highest Efficiency

•

Sleep Mode Current < 50mA

Complementary 1 Amp Outputs with

Regulated Gate Drive Voltage

•

LDO (Low Drop Out) Virtual 100%

Duty Cycle Operation

Light load efficiency is improved by a fully programmable standby mode, in

which the quiescent current consumption of the controller is significantly re-

duced. The reduction is achieved by disabling the MOSFET driver outputs

and the internal oscillator when the controller has sensed that the the out-

put load current has dropped a user programmable amount from full load.

Non-Overlapping Gate Drives

(continued)

BLOCK DIAGRAM

UDG-95005-1

SLUS286A - FEBRUARY 1998 - REVISED OCTOBER 2001

12 3 4 5 6 7...10

中文翻译

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与UC1874L-2相关器件

型号	品牌	获取价格	描述	数据表
UC1874N-1	TI	获取价格	High Efficiency, Synchronous, Step-down Buck Controllers
UC1874N-2	TI	获取价格	High Efficiency, Synchronous, Step-down Buck Controllers
UC1874Q-1	TI	获取价格	High Efficiency, Synchronous, Step-down Buck Controllers
UC1874Q-2	TI	获取价格	High Efficiency, Synchronous, Step-down Buck Controllers
UC1874QTR-1	ETC	获取价格	Analog IC
UC1874QTR-2	ETC	获取价格	Analog IC
UC1874-X	TI	获取价格	High Efficiency, Synchronous, Step-down (Buck) Controllers
UC1875	TI	获取价格	Phase Shift Resonant Controller
UC1875_16	TI	获取价格	Phase Shift Reasonant Controller
UC1875DWP	TI	获取价格	Phase Shift Resonant Controller

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