Datasheet > LM25115SD/NOPB

LM25115SD/NOPB

更新时间： 2024-11-16 01:09:35

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LM25115 Secondary Side Post Regulator Controller

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LM25115SD/NOPB 数据手册

LM25115

www.ti.com

SNVS418A –NOVEMBER 2005–REVISED APRIL 2013

LM25115 Secondary Side Post Regulator Controller

Check for Samples: LM25115

FEATURES

DESCRIPTION

The LM25115 controller contains all of the features

necessary to implement multiple output power

converters utilizing the Secondary Side Post

Regulation (SSPR) technique. The SSPR technique

develops a highly efficient and well regulated auxiliary

output from the secondary side switching waveform of

an isolated power converter. Regulation of the

auxiliary output voltage is achieved by leading edge

pulse width modulation (PWM) of the main channel

duty cycle. Leading edge modulation is compatible

with either current mode or voltage mode control of

the main output. The LM25115 drives external high

side and low side NMOS power switches configured

as a synchronous buck regulator. A current sense

amplifier provides overload protection and operates

over a wide common mode input range. Additional

features include a low dropout (LDO) bias regulator,

error amplifier, precision reference, adaptive dead

time control of the gate signals and thermal

shutdown.

•

Self-synchronization to Main Channel Output

Free-run Mode for Buck Regulation of DC

Input

•

Leading Edge Pulse Width Modulation

Voltage-mode Control with Current Injection

and Input Line Feed-forward

•

Operates from AC or DC Input up to 42V

Wide 4.5V to 30V Bias Supply Range

Wide 0.75V to 13.5V Output Range.

Top and Bottom Gate Drivers Sink 2.5A Peak

Adaptive Gate Driver Dead-time Control

Wide Bandwidth Error Amplifier (4MHz)

Programmable Soft-start

Thermal Shutdown Protection

TSSOP-16 or Thermally Enhanced WSON-16

Packages

Typical Application Circuit

Phase Signal

Main

Output

3.3V

FEEDBACK

INPUT

Main Converter

PWM Controller

Sync

+12V

Auxiliary

Output

2.0V

BIAS

RAMP

COMP

OUT

PGND AGND

Figure 1. Simplified Multiple Output Power Converter Utilizing SSPR Technique

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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LM25115SD/NOPB 替代型号

型号	品牌	替代类型	描述	数据表
LM25115SDX/NOPB	TI	完全替代	LM25115 Secondary Side Post Regulator Controller

与LM25115SD/NOPB相关器件

型号	品牌	获取价格	描述	数据表
LM25115SDX	NSC	获取价格	Secondary Side Post Regulator Controller
LM25115SDX/NOPB	TI	获取价格	LM25115 Secondary Side Post Regulator Controller
LM25116	NSC	获取价格	Wide Range Synchronous Buck Controller
LM25116	TI	获取价格	Wide Range Synchronous Buck Controller
LM25116_14	TI	获取价格	Wide Range Synchronous Buck Controller
LM25116MH	TI	获取价格	Wide Range Synchronous Buck Controller
LM25116MH	NSC	获取价格	Wide Range Synchronous Buck Controller
LM25116MH/NOPB	TI	获取价格	Wide Range Synchronous Buck Controller
LM25116MHX	TI	获取价格	Wide Range Synchronous Buck Controller
LM25116MHX	NSC	获取价格	Wide Range Synchronous Buck Controller

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