SP7655ER

更新时间： 2024-02-07 16:35:36

品牌	Logo	应用领域
西伯斯 - SIPEX		稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管输出元件
页数	文件大小	规格书
16页	1791K
描述
Wide Input Voltage Range, 8Amp 300kHz, Buck Regulator

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中文翻译

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技术参数
数据手册
替代型号

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SP7655ER 技术参数

是否Rohs认证：	符合	生命周期：	Transferred
包装说明：	7 X 4 MM, ROHS COMPLIANT, DFN-26	Reach Compliance Code：	unknown
风险等级：	5.76	Is Samacsys：	N
模拟集成电路 - 其他类型：	SWITCHING REGULATOR	控制模式：	VOLTAGE-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	5.5 V
最小输入电压：	4.5 V	标称输入电压：	5 V
JESD-30 代码：	R-XDSO-N26	JESD-609代码：	e3
长度：	7 mm	湿度敏感等级：	3
功能数量：	1	端子数量：	26
最高工作温度：	85 °C	最低工作温度：	-40 °C
最大输出电流：	10 A	封装主体材料：	UNSPECIFIED
封装代码：	HVSON	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	1 mm
表面贴装：	YES	切换器配置：	BUCK
最大切换频率：	300 kHz	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	NO LEAD
端子节距：	0.5 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	4 mm
Base Number Matches：	1

SP7655ER 数据手册

APPLICATIONS INFORMATION

Inductor Selection

I_PP

There are many factors to consider in selecting

the inductor including core material, inductance

vs. frequency, current handling capability, effi-

ciency, size and EMI. In a typical SP7655 cir-

cuit, the inductor is chosen primarily for value,

saturationcurrentandDCresistance. Increasing

the inductor value will decrease output voltage

ripple, but degrade transient response. Low in-

ductor values provide the smallest size, but

cause large ripple currents, poor efficiency and

require more output capacitance to smooth out

the larger ripple current. The inductor must be

able to handle the peak current at the switching

frequency without saturating, and the copper

resistance in the winding should be kept as low

as possible to minimize resistive power loss. A

good compromise between size, loss and cost is

to set the inductor ripple current to be within

20% to 40% of the maximum output current.

I_PEAK= I_{OUT (max)}

...and provide low core loss at the high switch-

ing frequency. Low cost powdered-iron cores

have a gradual saturation characteristic but can

introduce considerable AC core loss, especially

whentheinductorvalueisrelativelylowandthe

ripplecurrentishigh.Ferritematerials,although

more expensive, have an abrupt saturation char-

acteristic with the inductance dropping sharply

when the peak design current is exceeded. Nev-

ertheless, they are preferred at high switching

frequencies because they present very low core

loss while the designer is only required to

prevent saturation. In general, ferrite or

molypermalloy materials are a better choice for

all but the most cost sensitive applications.

The switching frequency and the inductor oper-

ating point determine the inductor value as fol-

lows:

Optimizing Efficiency

The power dissipated in the inductor is equal to

the sum of the core and copper losses. To mini-

mizecopperlosses,thewindingresistanceneeds

to be minimized, but this usually comes at the

expense of a larger inductor. Core losses have a

more significant contribution at low output cur-

rent where the copper losses are at a minimum,

and can typically be neglected at higher output

currentswherethecopperlossesdominate.Core

loss information is usually available from the

magneticsvendor.Properinductorselectioncan

affect the resulting power supply efficiency by

more than 15%!

V_OUT(V_{IN (max)}<V_OUT

)

L =

V_{IN (max)}F_SK_rI_{OUT (max)}

where:

F_S= switching frequency

K_r= ratio of the AC inductor ripple current to

the maximum output current

The peak-to-peak inductor ripple current is:

Thecopperlossintheinductorcanbecalculated

using the following equation:

V_OUT(V_{IN (max)}<V_OUT

)

P_L(Cu)= I_L²_(RMS)R_WINDING

I_PP

V_IN(max)F_SL

where I_L(RMS)is the RMS inductor current that

can be calculated as follows:

Once the required inductor value is selected, the

proper selection of core material is based on

peak inductor current and efficiency require-

ments. The core must be large enough not to

saturate at the peak inductor current...

I _PP

I_L(RMS)= I _OUT(max)1 +

I_OUT(max)

(

)

Rev E: 3/2ꢀ/07

SP7655 Wide Input Voltage Range 8A, 300kHz, Buck Regulator

1...4 5 678 9 10...16

中文翻译

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SP7655ER 替代型号

型号	品牌	替代类型	描述	数据表
SP7655ER-L	SIPEX	功能相似	暂无描述

与SP7655ER相关器件

型号	品牌	描述	获取价格	数据表
SP7655ER/TR	SIPEX	Wide Input Voltage Range 8A, 300kHz, Buck Regulator	获取价格
SP7655ERL	SIPEX	Wide Input Voltage Range, 8Amp 300kHz, Buck Regulator	获取价格
SP7655ER-L	SIPEX	暂无描述	获取价格
SP7655ERL/TR	SIPEX	Wide Input Voltage Range, 8Amp 300kHz, Buck Regulator	获取价格
SP7655ER-L/TR	SIPEX	Wide Input Voltage Range 8A, 300kHz, Buck Regulator	获取价格
SP7656	EXAR	3A, 29V Non-Synchronous Buck Converter	获取价格

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