Datasheet > LM5021

LM5021

更新时间： 2024-11-23 12:06:07

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
23页	1061K
描述
LM5021 AC-DC Current Mode PWM Controller

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LM5021 数据手册

LM5021

www.ti.com

SNVS359D –MAY 2005–REVISED MARCH 2013

LM5021 AC-DC Current Mode PWM Controller

Check for Samples: LM5021

FEATURES

DESCRIPTION

The LM5021 off-line pulse width modulation (PWM)

controller contains all of the features needed to

implement highly efficient off-line single-ended

flyback and forward power converters using current-

mode control. The LM5021 features include an ultra-

low (25 µA) start-up current, which minimizes power

losses in the high voltage start-up network. A skip

cycle mode reduces power consumption with light

loads for energy conserving applications (ENERGY

STAR®, CECP, etc.). Additional features include

under-voltage lockout, cycle-by-cycle current limit,

hiccup mode overload protection, slope com-

pensation, soft-start and oscillator synchronization

capability. This high performance 8-pin IC has total

propagation delays less than 100nS and a 1MHz

capable oscillator that is programmed with a single

resistor.

•

Ultra Low Start-up Current (25 µA maximum)

Current Mode Control

Skip Cycle Mode for Low Standby Power

Single Resistor Programmable Oscillator

Synchronizable Oscillator

Adjustable Soft-Start

Integrated 0.7A Peak Gate Driver

Direct Opto-Coupler Interface

Maximum Duty Cycle Limiting (80% for

LM5021-1 or 50% for LM5021-2)

•

Slope Compensation for (LM5021-1 Only)

Under Voltage Lockout (UVLO) with Hysteresis

Cycle-by-Cycle Over-Current Protection

Hiccup Mode for Continuous Overload

Protection

WHITE SPACE

•

Leading Edge Blanking of Current Sense

Signal

Packages: VSSOP-8 or PDIP-8

Simplified Application Diagram

VOUT

90 ~ 264 Vac

VCC

VIN

LM5021

OUT

COMP GND

FEEDBACK

WITH

ISOLATION

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.

All trademarks are the property of their respective owners.

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...23

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LM5021 替代型号

型号	品牌	替代类型	描述	数据表
LM5021-Q1	TI	功能相似	LM5021-Q1 AC-DC Current-Mode PWM Controller

与LM5021相关器件

型号	品牌	获取价格	描述	数据表
LM5021-1QDGKRQ1	TI	获取价格	LM5021-Q1 AC-DC Current-Mode PWM Controller
LM5021MM-1	TI	获取价格	LM5021 AC-DC Current Mode PWM Controller
LM5021MM-1	NSC	获取价格	AC-DC Current Mode PWM Controller
LM5021MM-1/NOPB	NSC	获取价格	IC 0.7 A SWITCHING CONTROLLER, 560 kHz SWITCHING FREQ-MAX, PDSO8, MSOP-8, Switching Regula
LM5021MM-1/NOPB	TI	获取价格	LM5021 AC-DC Current Mode PWM Controller
LM5021MM-2	TI	获取价格	LM5021 AC-DC Current Mode PWM Controller
LM5021MM-2	NSC	获取价格	AC-DC Current Mode PWM Controller
LM5021MM-2/NOPB	TI	获取价格	30V, 1MHZ current mode PWM controller 8-VSSOP -40 to 125
LM5021MM-2/NOPB	NSC	获取价格	IC 0.7 A SWITCHING CONTROLLER, 560 kHz SWITCHING FREQ-MAX, PDSO8, MSOP-8, Switching Regula
LM5021MMX-1	TI	获取价格	LM5021 AC-DC Current Mode PWM Controller

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