UC2846N现货热卖使用介绍供应商报价哪里找芯片批发报价-中国IC网-芯三七

当前位置：IC37首页_>U字母起始型号索引_>U字母起始型号索引第148页更新时间：2024-10-24 08:30:11

产品型号UC2846N的概述

UC2846N芯片概述 UC2846N是一款高性能的集成电路，专为开关电源控制而设计。它广泛应用于各种电源转换器、DC-DC转换器和电流模式控制电路中，特别在需要高效率和小型化设计的场合中表现突出。UC2846N集成了多种功能，包括故障保护、软启动、频率补偿等，旨在提高电源系统的稳定性与可靠性。该芯片采用双列直插式（DIP）封装，便于在各种电子电路中使用。其工作温度范围从0℃到70℃，适合大多数工业和消费电子应用。UC2846N设计上对电流模式进行优化，使其在负载变化时能够快速响应，从而维持电源输出的稳定性。 UC2846N的详细参数 UC2846N的关键参数包括： 1. 工作电压: 8V至40V 2. 启动电压: 16V 3. 工作频率: 100kHz至200kHz 4. 电流限制: 内部电流限制设定为2A 5. 功耗: 输出功率可达20W 6. 软启动时间: 可调 7. 温度范围...

产品型号UC2846N的Datasheet PDF文件预览

application

INFO

UC1846/7

UC2846/7

UC3846/7

available

Current Mode PWM Controller

FEATURES

DESCRIPTION

•

Automatic Feed Forward Compensation

The UC1846/7 family of control ICs provides all of the necessary

features to implement fixed frequency, current mode control

schemes while maintaining a minimum external parts count. The

superior performance of this technique can be measured in im-

proved line regulation, enhanced load response characteristics, and

a simpler, easier-to-design control loop. Topological advantages in-

clude inherent pulse-by-pulse current limiting capability, automatic

symmetry correction for push-pull converters, and the ability to par-

allel “power modules" while maintaining equal current sharing.

•

Programmable Pulse-by-Pulse Current

Limiting

•

Automatic Symmetry Correction in Push-pull

Configuration

•

Enhanced Load Response Characteristics

Parallel Operation Capability for Modular

Power Systems

Protection circuitry includes built-in under-voltage lockout and pro-

grammable current limit in addition to soft start capability. A shut-

down function is also available which can initiate either a complete

shutdown with automatic restart or latch the supply off.

•

Differential Current Sense Amplifier with

Wide Common Mode Range

•

Double Pulse Suppression

500mA (Peak) Totem-pole Outputs

1% Bandgap Reference

Under-voltage Lockout

Soft Start Capability

Other features include fully latched operation, double pulse sup-

pression, deadline adjust capability, and a 1% trimmed bandgap

reference.

The UC1846 features low outputs in the OFF state, while the

UC1847 features high outputs in the OFF state.

Shutdown Terminal

500kHZ Operation

BLOCK DIAGRAM

5.1 V

VIN 15

REFERENCE

REGULATOR

VREF

13 VC

SYNC 10

UVLO

LOCKOUT

F/F

11 A OUT

OSC

UC1846

Output Stage

C/S-

COMP

0.5 V

UC1847

Output Inverted

C/S+

14 B OUT

0.5 mA

12 GND

E/A

INV

CURRENT

LIMIT ADJUST

16 SHUTDOWN

COMP

350 mV

6 k

UDG-02057

SLUS352A - JANUARY 1997 - REVISED MARCH 2002

UC1846/7

UC2846/7

UC3846/7

ABSOLUTE MAXIMUM RATINGS (Note 1)

Supply Voltage (Pin 15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +40V

Collector Supply Voltage (Pin 13) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +40V

Output Current, Source or Sink (Pins 11, 14) . . . . . . . . . . . . . . . . . . . . . . . 500mA

Analog Inputs (Pins 3, 4, 5, 6, 16). . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +V_IN

Reference Output Current (Pin 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30mA

Sync Output Current (Pin 10). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -5mA

Error Amplifier Output Current (Pin 7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -5mA

Soft Start Sink Current (Pin 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA

Oscillator Charging Current (Pin 9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA

Power Dissipation at TA=25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000mW

Power Dissipation at TC=25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000mW

Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C

Lead Temperature (soldering, 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . +300°C

Note 1. All voltages are with respect to Ground, Pin 13. Currents are positive into,

negative out of the speficied terminal. Consult Packaging Section of Databook for

thermal limitations and considerations of packages. Pin numbers refer to DIL and

SOIC packages only.

CONNECTION DIAGRAMS

DIL-16, SOIC-16

PLCC-20, LCC-20

(TOP VIEW)

Q, L Packages

PACKAGE PIN FUNCTION

(TOP VIEW)

FUNCTION

J or N Package, DW Package

N/C

C/L SS

VREF

C/S-

C/S+

N/C

E/A+

E/A-

Comp

N/C

Sync

A Out

Gnd

N/C

B Out

VIN

Shutdown

(Unless otherwise stated, these specifications apply for TA=-55°C to +125°C for

UC1846/7; -40°C to +85°C for the UC2846/7; and 0°C to +70°C for the UC3846/7;

VIN=15V, RT=10k, CT=4.7nF, TA=TJ.)

ELECTRICAL CHARACTERISTICS

UC1846/UC1847

UC3846/UC3847

PARAMETER

TEST CONDITIONS

UC2846/UC2847

MIN. TYP. MAX. MIN. TYP. MAX. UNITS

Reference Section

Output Voltage

TJ=25°C, IO=1mA

5.05

5.10

5.15

5.00

5.10

5.20

mV/°C

Line Regulation

VIN=8V to 40V

Load Regulation

IL=1mA to 10mA

Temperature Stability

Total Output Variation

Output Noise Voltage

Long Term Stability

Over Operating Range, (Note 2)

Line, Load, and Temperature (Note 2)

10Hz ≤ f ≤10kHz, TJ=25°C (Note 2)

TJ=125°C, 1000 Hrs. (Note 2)

0.4

5.00

-10

5.20

4.95

-10

5.25

100

µV

Short Circuit Output Current VREF=0V

-45

UC1846/7

UC2846/7

UC3846/7

(Unless otherwise stated, these specifications apply for TA=-55°C to +125°C for UC1846/7;

-40°C to +85°C for the UC2846/7; and 0°C to +70°C for the UC3846/7; VIN=15V, RT=10k,

CT=4.7nF, TA=TJ.)

ELECTRICAL

CHARACTERISTICS (cont.)

UC1846/UC1847

UC3846/UC3847

PARAMETER

TEST CONDITIONS

UC2846/UC2847

MIN. TYP. MAX. MIN. TYP. MAX. UNITS

Oscillator Section

Initial Accuracy

TJ=25°C

VIN=8V to 40V

-1

kHz

Voltage Stability

Temperature Stability

Sync Output High Level

Sync Output Low Level

Sync Input High Level

Sync Input Low Level

Sync Input Current

Error Amp Section

Input Offset Voltage

Input Bias Current

Input Offset Current

Common Mode Range

Open Loop Voltage Gain

Unity Gain Bandwidth

CMRR

Over Operating Range (Note 2)

-1

3.9

4.35

2.3

3.9

4.35

2.3

2.5

Pin 8=0V

2.5

1.5

2.5

1.5

Sync Voltage=3.9V, Pin 8=0V

1.3

0.5

-0.6

-1

0.5

-0.6

-2

µA

250

VIN-2V

250

VIN=8V to 40V

0.7

VIN-2V

∆VO=1.2 to 3V, VCM=2V

TJ=25°C (Note 2)

105

1.0

100

105

1.0

100

105

MHz

V_CM=0V to 38V, VIN=40V

VIN=8V to 40V

PSRR

Output Sink Current

Output Source Current

VID=-15mV to -5V, VPIN 7=1.2V

VID=15mV to 5V, VPIN 7=2.5V

-0.4

4.3

-0.5

4.6

0.7

-0.4

4.3

-0.5

4.6

0.7

High Level Output Voltage RL=(Pin 7) 15kΩ

Low Level Output Voltage

Current Sense Amplifier Section

Amplifier Gain

VPIN 3=0V, Pin 1 Open (Notes 3 & 4)

2.5

1.1

2.75

3.0

2.5

1.1

2.75

3.0

Maximum Differential Input Pin 1 Open (Note 3)

Signal (VPIN 4-VPIN 3)

Input Offset Voltage

CMRR

RL (Pin 7)=15kW

1.2

µA

VPIN 1=0.5V, Pin 7 Open (Note 3)

VCM=1V to 12V

PSRR

VIN=8V to 40V

Input Bias Current

Input Offset Current

Input Common Mode Range

Delay to Outputs

VPIN 1=0.5V, Pin 7 Open (Note 3)

-2.5

0.08

-10

-2.5

0.08

-10

VIN-3

500

VIN-3

500

TJ=25°C, (Note 2)

200

Current Limit Adjust Section

Current Limit Offset

VPIN 3=0V, VPIN 4=0V, Pin 7 Open

(Note 3)

0.45

0.5

-10

0.55

-30

0.45

0.5

-10

0.55

-30

Input Bias Current

Shutdown Terminal Section

Threshold Voltage

VPIN 5=VREF, VPIN 6=0V

µA

250

350

1.5

400

VIN

250

350

1.5

400

VIN

Input Voltage Range

Minimum Latching Current (Note 6)

(IPIN 1)

3.0

UC1846/7

UC2846/7

UC3846/7

(Unless otherwise stated, these specifications apply for TA=-55°C to +125°C for UC1846/7;

-40°C to +85°C for the UC2846/7; and 0°C to +70°C for the UC3846/7; VIN=15V, RT=10k,

CT=4.7nF, TA=TJ.)

ELECTRICAL

CHARACTERISTICS (cont.)

UC1846/UC1847

UC3846/UC3847

PARAMETER

TEST CONDITIONS

UC2846/UC2847

MIN. TYP. MAX. MIN. TYP. MAX. UNITS

Shutdown Terminal Section (cont.)

Maximum Non-Latching

Current (IPIN 1)

(Note 7)

1.5

0.8

1.5

0.8

Delay to Outputs

TJ=25°C (Note 2)

300

600

300

600

Output Section

Collector-Emitter Voltage

µA

Collector Leakage Current VC=40V (Note 5)

200

0.4

2.1

200

0.4

2.1

Output Low Level

ISINK=20mA

0.1

0.4

0.1

0.4

ISINK=100mA

Output High Level

ISOURCE=20mA

13.5

ISOURCE=100mA

Rise Time

Fall Time

CL=1nF, TJ=25°C (Note 2)

300

Under-Voltage Lockout Section

Start-Up Threshold

7.7

8.0

7.7

8.0

Threshold Hysteresis

Total Standby Current

Supply Current

0.75

Note 2. These parameters, although guaranteed over the recommended operating conditions, are not 100% tested in production.

Note 3. Parameter measured at trip point of latch with VPIN 5 = VREF, VPIN 6 = 0V.

∆V_{PIN 7}

∆V_{PIN 4}

Note 4. Amplifier gain defined as: G =

;

V_PIN4= 0 to 1.0V

Note 5. Applies to UC1846/UC2846/UC3846 only due to polarity of outputs.

Note 6. Current into Pin 1 guaranteed to latch circuit in shutdown state.

Note 7. Current into Pin 1 guaranteed not to latch circuit in shutdown state.

APPLICATIONS DATA

Oscillator Circuit









3.6

RT (kΩ)





Output deadtime is determined by the external capacitor, CT, according to the formula: τd (µs) =145CT (µf )

ID -









ID = Oscillator discharge current at 25°C is typically 7.5.

For large values of RT: τd (µs) ≈145CT (µf ).

2.2

Oscillator frequency is approximated by the formula:fT (kHz) ≈

RT (kΩ) •CT (µf )

UC1846/7

UC2846/7

UC3846/7

APPLICATIONS DATA (cont.)

Error Amp Gain and Phase vs Frequency

Error Amp Output Configuration

Error Amp Open-Logic D.C. Gain vs Load Resistance

Parallel Operation

UC1846/7

UC2846/7

UC3846/7

APPLICATIONS DATA (cont.)

Pulse by Pulse Current Limiting

R2 VREF

−0.5

R1 + R2

Peak Current (IS) is determined by the formula:IS =

3RS

Soft Start and Shutdown /Restart Functions

UC1846/7

UC2846/7

UC3846/7

APPLICATIONS DATA (cont.)

Current Sense Amp Connection

A small RC filter may be required in some applications to reduce switch transients.

Differential input allows remote, noise free sensing.

UC1846 Open Loop Test Circuit

PACKAGE OPTION ADDENDUM

www.ti.com

2-May-2005

PACKAGING INFORMATION

Orderable Device

Status ⁽¹⁾

Package Package

Pins Package Eco Plan ⁽²⁾Lead/Ball Finish MSL Peak Temp ⁽³⁾

Qty

Type

LCCC

CDIP

LCCC

CDIP

LCCC

CDIP

LCCC

SOIC

CDIP

PDIP

PLCC

SOIC

PDIP

SOIC

CDIP

PDIP

PLCC

SOIC

CDIP

PDIP

Drawing

5962-86806012A

5962-8680601EA

5962-8680601V2A

5962-8680601VEA

UC1846J

ACTIVE

TBD

POST-PLATE Level-NC-NC-NC

A42 SNPB

Call TI

Level-NC-NC-NC

Call TI

ACTIVE

Call TI

ACTIVE

A42 SNPB

Call TI

UC1846J/80257

UC1846J/80364

UC1846J/80619

UC1846J883B

UC1846JQMLV

UC1846L883B

UC1846LQMLV

UC1847J

OBSOLETE

ACTIVE

Call TI

A42 SNPB

Call TI

Level-NC-NC-NC

Call TI

ACTIVE

POST-PLATE Level-NC-NC-NC

ACTIVE

Call TI

OBSOLETE

ACTIVE

UC1847J883B

UC1847L

UC1847L883B

UC2846DW

2000

CU NIPDAU Level-2-220C-1 YEAR

UC2846DWTR

UC2846J

ACTIVE

A42 SNPB

Level-NC-NC-NC

UC2846N

ACTIVE

CU NIPDAU Level-NA-NA-NA

UC2846Q

ACTIVE

Call TI

Level-2-220C-1 YEAR

UC2846QTR

UC2847DW

ACTIVE

1000

ACTIVE

CU NIPDAU Level-2-220C-1 YEAR

CU NIPDAU Level-NA-NA-NA

UC2847DWTR

UC2847N

ACTIVE

2000

ACTIVE

UC3846DW

ACTIVE

CU NIPDAU Level-2-220C-1 YEAR

UC3846DWTR

UC3846J

ACTIVE

2000

ACTIVE

A42 SNPB

Level-NC-NC-NC

UC3846N

ACTIVE

CU NIPDAU Level-NA-NA-NA

UC3846Q

ACTIVE

Call TI

Level-2-220C-1 YEAR

UC3846QTR

UC3847DW

ACTIVE

1000

ACTIVE

CU NIPDAU Level-2-220C-1 YEAR

UC3847DWTR

UC3847J

ACTIVE

2000

OBSOLETE

ACTIVE

Call TI

UC3847N

CU NIPDAU Level-NA-NA-NA

⁽¹⁾The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in

a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

Addendum-Page 1

PACKAGE OPTION ADDENDUM

www.ti.com

Eco Plan

2-May-2005

(2)

The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS

no Sb/Br)

please check

http://www.ti.com/productcontent for the latest availability information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements

for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered

at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame

retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)

(3)

MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder

temperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is

provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the

accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take

reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on

incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited

information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI

to Customer on an annual basis.

Addendum-Page 2

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,

enhancements, improvements, and other changes to its products and services at any time and to discontinue

any product or service without notice. Customers should obtain the latest relevant information before placing

orders and should verify that such information is current and complete. All products are sold subject to TI’s terms

and conditions of sale supplied at the time of order acknowledgment.

TI warrants performance of its hardware products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI

deems necessary to support this warranty. Except where mandated by government requirements, testing of all

parameters of each product is not necessarily performed.

TI assumes no liability for applications assistance or customer product design. Customers are responsible for

their products and applications using TI components. To minimize the risks associated with customer products

and applications, customers should provide adequate design and operating safeguards.

TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,

in which TI products or services are used. Information published by TI regarding third-party products or services

does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.

Use of such information may require a license from a third party under the patents or other intellectual property

of the third party, or a license from TI under the patents or other intellectual property of TI.

Reproduction of information in TI data books or data sheets is permissible only if reproduction is without

alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction

of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for

such altered documentation.

Resale of TI products or services with statements different from or beyond the parameters stated by TI for that

product or service voids all express and any implied warranties for the associated TI product or service and

is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.

Following are URLs where you can obtain information on other Texas Instruments products and application

solutions:

Products

Applications

Audio

Amplifiers

amplifier.ti.com

www.ti.com/audio

Data Converters

dataconverter.ti.com

Automotive

www.ti.com/automotive

DSP

dsp.ti.com

Broadband

Digital Control

Military

www.ti.com/broadband

www.ti.com/digitalcontrol

www.ti.com/military

Interface

Logic

interface.ti.com

logic.ti.com

Power Mgmt

Microcontrollers

power.ti.com

Optical Networking

Security

www.ti.com/opticalnetwork

www.ti.com/security

www.ti.com/telephony

www.ti.com/video

microcontroller.ti.com

Telephony

Video & Imaging

Wireless

www.ti.com/wireless

Mailing Address:

Texas Instruments

Post Office Box 655303 Dallas, Texas 75265

UC2846N相关文章

配单直通车

首天国际（深圳）科技有限公司服务专线: 0755-82807802/82807803 在线联系:

QQ：528164397 复制

QQ：1318502189 复制

柒号芯城电子商务（深圳）有限公司服务专线: 0755-83209937 在线联系:

QQ：2881677436 复制

QQ：2881620402 复制

深圳市中利达电子科技有限公司服务专线: 0755-83200645/13686833545 在线联系:

QQ：1902134819 复制

QQ：2881689472 复制

北京元坤伟业科技有限公司服务专线: 010-62104931621064316210489162104791 在线联系:

QQ：857273081 复制

QQ：1594462451 复制

深圳市芯福林电子有限公司服务专线: 13418564337 在线联系:

QQ：2881495808 复制

QQ：308365177 复制

UC2846N产品参数

型号:	UC2846N
Brand Name：	Texas Instruments
是否无铅：	不含铅
是否Rohs认证：	符合
生命周期：	Active
零件包装代码：	DIP
包装说明：	DIP, DIP16,.3
针数：	16
Reach Compliance Code：	compliant
ECCN代码：	EAR99
HTS代码：	8542.39.00.01
Factory Lead Time：	1 week
风险等级：	0.78
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：	40 V
最小输入电压：	7.25 V
标称输入电压：	15 V
JESD-30 代码：	R-PDIP-T16
JESD-609代码：	e4
长度：	19.3 mm
功能数量：	1
端子数量：	16
最高工作温度：	85 °C
最低工作温度：	-40 °C
最大输出电流：	0.5 A
最大输出电压：	5.15 V
最小输出电压：	5.05 V
标称输出电压：	5.1 V
封装主体材料：	PLASTIC/EPOXY
封装代码：	DIP
封装等效代码：	DIP16,.3
封装形状：	RECTANGULAR
封装形式：	IN-LINE
峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified
座面最大高度：	3.9 mm
子类别：	Switching Regulator or Controllers
最大供电电流 (Isup)：	21 mA
表面贴装：	NO
切换器配置：	PUSH-PULL
最大切换频率：	500 kHz
技术：	BICMOS
温度等级：	INDUSTRIAL
端子面层：	Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：	THROUGH-HOLE
端子节距：	2.54 mm
端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	6.35 mm
Base Number Matches：	1

电子百科

产品导航

产品型号UC2846N的概述

产品型号UC2846N的Datasheet PDF文件预览

UC2846N相关产品

UC2846N相关文章

IC37:专业IC行业平台