Datasheet > AN45

AN45

更新时间： 2024-11-14 06:37:11

品牌	Logo	应用领域
芯科 - SILICON		转换器电容器 DC-DC转换器
页数	文件大小	规格书
14页	220K
描述
DESIGN GUIDE FOR THE Si3210/15/16 DC-DC CONVERTER

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

AN45 数据手册

AN45

DESIGN GUIDE FOR THE Si3210/15/16 DC-DC CONVERTER

Introduction

The ProSLIC® from Silicon Laboratories integrates a requirements and selecting component values for each

complete analog telephone interface into one of the dc-dc converter architectures.

low-voltage CMOS device and offers extensive software

Si321x DC-DC Converter Description

programmability to meet many global telephony

requirements and customer specifications. In addition to The dc-dc converter dynamically generates the large

performing all BORSCHT functions, the Si321x also negative voltages required to operate the linefeed

dynamically generates and controls its own battery interface. The Si321x acts as the controller for a

voltage, eliminating the need for external battery buck-boost dc-dc converter that converts a positive dc

supplies. Two different battery generation architectures voltage into the desired negative battery voltage. In

are supported: a BJT/inductor design offering a low-cost addition to eliminating external power supplies, this

battery supply solution, and a MOSFET/transformer allows the Si321x to minimize power dissipation by

design offering increased power efficiency and a wider dynamically controlling the battery voltage to the

range of input voltages. This application note gives minimum required for any given mode of operation.

specific guidance in determining dc-dc converter power

Twisted

Telephone

Pair Line

R_LINE

Hook SW.

Input

Output

TIP

DC-DC

Converter

V_DC

V_BAT

–

V_TR

–

R_LINE

RING

Linefeed Circuitry

Ringer

RDC

Figure 1. Linefeed Power Diagram

in parallel to the TIP and RING lines, the equivalent

impedance of the parallel ringers can be computed as

the following (NREN is limited to 1 to 5):

Power Output Requirement

Understanding the maximum power required by the

ProSLIC linefeed circuitry to operate a worst-case

specified load is the first step in determining the dc-dc

converter design solution. Figure 1 defines the linefeed

circuit and load circuit in basic blocks of circuitry.

7000

-----------------

R_NREN

NREN

During ringing, the TIP-to-RING peak voltage, V

TR_PK

Typically, the ringing state is the highest power

consumption state for the SLIC, but in special cases the

off-hook state can have the highest. Guidance in

calculating each of these states is offered in this

section.

is the sum of the rms voltage drop across the ringer

circuit, V , the line resistance, and the internal

RINGrms

source resistance of 160 Ω.

V_RINGrms

× 2

7000

NREN







---------------------------------------

-----------------

The ringer impedance of one telephone is defined as an

8 µF cap in series with a 6930 Ω resistor. This is

approximately the same impedance as 7000 Ω at 20 Hz

and is defined as 1 REN (ringing equivalence number).

Since there can be N number of telephones connected

V_{TR_PK}

+ R_LINE+ R_s



7000 ⁄ NREN

Rev. 0.5 7/03

AN45-050

12 3 4 5 6 7...14

中文翻译

下载PDF

与AN45相关器件

型号	品牌	获取价格	描述	数据表
AN-45	MICREL	获取价格	3.3V, 3.2 Gbps Limiting Post Amplifier with Programmable Decision Threshold
AN4502	ETC	获取价格	Electrostatic handling precautions
AN4503	ETC	获取价格	An introduction to IGBTs
AN4504	ETC	获取价格	IGBT ratings and characteristics
AN4505	DYNEX	获取价格	Power Assemblies
AN4506	DYNEX	获取价格	Power Assemblies
AN4507	ETC	获取价格	Gate drive considerations to maximise IGBT efficiency
AN4515	FREESCALE	获取价格	Dual 6.0 m high-side switch
AN4516	FREESCALE	获取价格	Dual 6.0 m high-side switch
AN453	FREESCALE	获取价格	Product Brief Integrated Processor With DMA

与AN45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

2
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

2
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

29
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

12

产品中心

服务支持

精选活动

关于我们

帮助中心

AN45

AN45 数据手册

与AN45相关器件

与AN45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

AN45

AN45 数据手册

与AN45相关器件

与AN45相关文章

您还可以找

您在本页遇到什么问题？