Datasheet > AAT3688IWP-4.2-T1

AAT3688IWP-4.2-T1

更新时间： 2024-01-17 16:53:08

品牌	Logo	应用领域
ANALOGICTECH		电池
页数	文件大小	规格书
23页	527K
描述
USB Port Lithium-Ion/Polymer Battery Charger

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技术参数
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AAT3688IWP-4.2-T1 技术参数

生命周期：	Transferred	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.79

AAT3688IWP-4.2-T1 数据手册

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AAT3688

USB Port Lithium-Ion/Polymer Battery Charger

the AAT3688 status data control will reply the data

word back to the system microcontroller after a

Data Timing

The system microcontroller should assert an active

low data request pulse for minimum duration of

200ns; this is specified by T_LO(DATA). Upon sensing

the rising edge of the end of the data request pulse,

delay specified by the data report time specification

_DATA(RPT). The period of the following group of data

pulses will be specified by the T_DATAspecification.

Timing Diagram

SQ_PULSE

P_DATA

System Reset

System Start

T_SYNC

T_LAT

T_OFF

Data

T_DATA(RPT)= T_SYNC+ T_LAT< 2.5 P_DATA

T_OFF> 2 P_DATA

N=3

N=1

N=2

Where:

Thermal Considerations

The AAT3688 is packaged in a Pb-free, 3x3mm

TDFN package which can provide up to 2.0W of

power dissipation when it is properly bonded to a

printed circuit board and has a maximum thermal

resistance of 50°C/W. Many considerations should

be taken into account when designing the printed

circuit board layout, as well as the placement of the

charger IC package in proximity to other heat gen-

erating devices in a given application design. The

ambient temperature around the charger IC will

also have an affect on the thermal limits of a bat-

tery charging application. The maximum limits that

can be expected for a given ambient condition can

be estimated by the following discussion.

P_D= Total Power Dissipation by the Device

V_IN= Input Voltage Level, V_USB

V_BAT= Battery Voltage as Seen at the BAT Pin

I_CC= Maximum Constant Fast Charge Current

Programmed for the Application

I_OP= Quiescent Current Consumed by the

Charger IC for Normal Operation

Next, the maximum operating ambient temperature

for a given application can be estimated based on

the thermal resistance of the 3x3mm TDFN pack-

age when sufficiently mounted to a PCB layout and

the internal thermal loop temperature threshold.

First, the maximum power dissipation for a given

situation should be calculated:

T_A= T_J- (θ_JA

· P_D)

Eq. 5:

P_D= [(V_IN- V_BAT) · I_CC+ (V_IN· I_OP)]

Eq. 4:

3688.2006.04.1.3

1...15 16 171819 20 21...23

中文翻译

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与AAT3688IWP-4.2-T1相关器件

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AAT3690IWP-4.2-T1	ANALOGICTECH	获取价格	1.0A USB Port/Adapter Lithium-Ion/Polymer Battery Charger
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