Datasheet > TL2845BQDRQ1

TL2845BQDRQ1

更新时间： 2024-11-26 12:21:43

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
16页	284K
描述
HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLER

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

TL2845BQDRQ1 数据手册

TL2843B-Q1

www.ti.com

SLVSAE2A –JULY 2010–REVISED FEBRUARY 2012

HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLER

Check for Samples: TL2843B-Q1

FEATURES

•

Qualified for Automotive Applications

Low Start-Up Current (<0.5 mA)

Trimmed Oscillator Discharge Current

Current Mode Operation to 500 kHz

Automatic Feed-Forward Compensation

Latching PWM for Cycle-by-Cycle Current

Limiting

•

Internally Trimmed Reference With

Undervoltage Lockout

High-Current Totem-Pole Output Undervoltage

Lockout With Hysteresis

Double-Pulse Suppression

DESCRIPTION

The TL284xB series of control integrated circuits provide the features that are necessary to implement off-line or

dc-to-dc fixed-frequency current-mode control schemes, with a minimum number of external components.

Internally implemented circuits include an undervoltage lockout (UVLO) and a precision reference that is trimmed

for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a

pulse-width modulation (PWM) comparator that also provides current-limit control, and a totem-pole output stage

designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low

when it is in the off state.

The TL284xB series are pin compatible with the standard TL284x with the following improvements. The start-up

current is specified to be 0.5 mA (max), while the oscillator discharge current is trimmed to 8.3 mA (typ). In

addition, during undervoltage lockout conditions, the output has a maximum saturation voltage of 1.2 V while

sinking 10 mA (V_CC= 5 V).

Major differences between members of these series are the UVLO thresholds and maximum duty-cycle ranges.

Typical UVLO thresholds of 16 V (on) and 10 V (off) on the TL2842B and TL2844B devices make them ideally

suited to off-line applications. The corresponding typical thresholds for the TL2843B and TL2845B devices are

8.4 V (on) and 7.6 V (off). The TL2842B and TL2843B devices can operate to duty cycles approaching 100%. A

duty-cycle range of 0% to 50% is obtained by the TL2844B and TL2845B by the addition of an internal toggle

flip-flop, which blanks the output off every other clock cycle.The TL284xB-series devices are characterized for

operation from –40°C to 125°C.

Table 1. ORDERING INFORMATION⁽¹⁾

T_A

PACKAGE⁽²⁾

ORDERABLE PART NUMBER

TL2842BQDRQ1

TOP-SIDE MARKING

Product Preview

TL2843BQ

TL2843BQDRQ1

–40°C to 125°C

SOIC – D

Reel of 2500

TL2844BQDRQ1

Product Preview

TL2845BQDRQ1

(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

web site at www.ti.com.

(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

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...16

中文翻译

下载PDF

与TL2845BQDRQ1相关器件

型号	品牌	获取价格	描述	数据表
TL2845D	TI	获取价格	CURRENT-MODE PWM CONTROLLERS
TL2845D-8	TI	获取价格	CURRENT-MODE PWM CONTROLLERS
TL2845DE4	TI	获取价格	CURRENT-MODE PWM CONTROLLERS
TL2845DE4-8	TI	获取价格	CURRENT-MODE PWM CONTROLLERS
TL2845DG4	TI	获取价格	CURRENT-MODE PWM CONTROLLERS
TL2845DG4-8	TI	获取价格	CURRENT-MODE PWM CONTROLLERS
TL2845DR	TI	获取价格	CURRENT-MODE PWM CONTROLLERS
TL2845DR-8	TI	获取价格	CURRENT-MODE PWM CONTROLLERS
TL2845DRE4	TI	获取价格	CURRENT-MODE PWM CONTROLLERS
TL2845DRE4-8	TI	获取价格	CURRENT-MODE PWM CONTROLLERS

与TL2845BQDRQ1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

45
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

34
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

62
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

59

产品中心

服务支持

精选活动

关于我们

帮助中心

TL2845BQDRQ1

TL2845BQDRQ1 数据手册

与TL2845BQDRQ1相关器件

与TL2845BQDRQ1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

TL2845BQDRQ1

TL2845BQDRQ1 数据手册

与TL2845BQDRQ1相关器件

与TL2845BQDRQ1相关文章

您还可以找

您在本页遇到什么问题？