Datasheet > UC3544Q

UC3544Q

更新时间： 2024-01-28 07:06:57

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
20页	1211K
描述
1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC20, PLASTIC, LCC-20

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UC3544Q 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	QLCC	包装说明：	QCCJ, LDCC20,.4SQ
针数：	20	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.75	可调阈值：	NO
模拟集成电路 - 其他类型：	POWER SUPPLY SUPPORT CIRCUIT	JESD-30 代码：	S-PQCC-J20
长度：	8.965 mm	信道数量：	1
功能数量：	1	端子数量：	20
最高工作温度：	70 °C	最低工作温度：
封装主体材料：	PLASTIC/EPOXY	封装代码：	QCCJ
封装等效代码：	LDCC20,.4SQ	封装形状：	SQUARE
封装形式：	CHIP CARRIER	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	4.5/40 V	认证状态：	Not Qualified
座面最大高度：	4.57 mm	子类别：	Power Management Circuits
最大供电电流 (Isup)：	15 mA	最大供电电压 (Vsup)：	40 V
最小供电电压 (Vsup)：	4.5 V	标称供电电压 (Vsup)：	10 V
表面贴装：	YES	技术：	BIPOLAR
温度等级：	COMMERCIAL	端子形式：	J BEND
端子节距：	1.27 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	8.965 mm
Base Number Matches：	1

UC3544Q 数据手册

UC1543, UC1544

UC2543, UC2544

UC3543, UC3544

www.ti.com

SLUS188A–APRIL 1997–REVISED FEBRUARY 2007

Power Supply Supervisory Circuit

Both over- and under-voltage sensing circuits can be

externally programmed for minimum time duration of

fault before triggering. All functions contain open

collector outputs which can be used independently or

wire-or’ed together, and although the SCR trigger is

directly connected only to the over-voltage sensing

circuit, it may be optionally activated by any of the

other outputs, or from an external signal. The O.V.

circuit also includes an optional latch and external

reset capability.

FEATURES

•

Includes Over-Voltage, Under-Voltage, and

Current Sensing Circuits

•

Internal 1% Accurate Reference

Programmable Time Delays

SCR “Crowbar” Drive of 300 mA

Remote Activation Capability

Optional Over-Voltage Latch

Uncommitted Comparator Inputs for Low

Voltage Sensing (UC1544 Series Only)

The UC1544/2544/3544 devices have the added

versatility of completely uncommitted inputs to the

voltage sensing comparators so that levels less than

2.5 V may be monitored by dividing down the internal

reference voltage. The current sense circuit may be

used with external compensation as a linear amplifier

or as a highgain comparator. Although nominally set

for zero input offset, a fixed threshold may be added

with an external resistor. Instead of current limiting,

this circuit may also be used as an additional voltage

monitor.

DESCRIPTION

The monolithic integrated circuits contain all the

functions necessary to monitor and control the output

sophisticated power supply system.

Over-voltage (O.V.) sensing with provision to trigger

an external SCR “crowbar” shutdown; an

undervoltage (U.V.) circuit which can be used to

monitor either the output or to sample the input line

voltage; and a third op amp/comparator usable for

current sensing (C.L.) are all included in this device,

together with an independent, accurate reference

generator.

The reference generator circuit is internally trimmed

to eliminate the need for external potentiometers and

the entire circuit may be powered directly from either

the output being monitored or from a separate bias

voltage.

BLOCK DIAGRAM

NOTE:

For each terminal, first number refers to 1543 series, second to 1544 series.

*On 1543 series, this function is internally connected to VREF.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...20

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与UC3544Q相关器件

型号	品牌	获取价格	描述	数据表
UC3544QTR	ETC	获取价格	Voltage Detector
UC3548	TI	获取价格	Primary Side PWM Controller
UC3548DW	TI	获取价格	2.2A SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, PDSO16
UC3548DWTR	TI	获取价格	2.2A SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, PDSO16, 0.300 INCH, PLASTIC, SOIC-1
UC3548J	TI	获取价格	2.2A SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, CDIP16
UC3548N	TI	获取价格	Primary Side PWM Controller 16-PDIP 0 to 70
UC3548Q	TI	获取价格	2.2A SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, PQCC20, PLASTIC, LCC-20
UC3548QTR	TI	获取价格	2.2A SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, PQCC20, PLASTIC, LCC-20
UC3550	UTC	获取价格	PWM CONTROLLED，PWM/PFM SWITCHABLE STEP-UP DC-
UC3550_10	UTC	获取价格	PWM CONTROLLED,PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER

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