参数资料
| 型号： | AD8383ACPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC DECIMATING LCD DRIVER 48LFCSP |
| 产品变化通告： | AD8383ACPZ Discontinuation 28/Feb/2012 |
| 标准包装： | 1 |
| 系列： | DecDriver™ |
| 显示器类型： | LCD |
| 接口： | 并联 |
| 电流 - 电源： | 20mA |
| 电源电压： | 9 V ~ 18 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 48-LFCSP-VQ（7x7） |
| 包装： | 托盘 |
| 产品目录页面： | 798 (CN2011-ZH PDF) |
AD8383
θ
θ JB , ψ JB
θ , ψ
AD8383
θ JC
θ AIR-CASE
C JC
T CASE
C AIR-CASE
θ JC-BOTTOM
θ PCB
θ AIR-PCB
T A
T AMBIENT
P
C
T J
C JC-BOTTOM
C PCB
T PCB
C AIR-PCB
PCB
Figure 14. Thermal Equivalent Circuit
ESTIMATED JUNCTION TEMPERATURE
( T J ? T CASE ) ( T J ? T PCB )
Assuming no heat flows through the sides of the AD8383 pack-
age, heat flow from the AD8383 is through two paths. While
part of the total heat generated dissipates through the top of the
case, the remainder flows into the PCB to be dissipated.
Assuming there is no other heat-generating component near the
AD8383, the thermal equivalent circuit of a system that consists
The thermal resistance of the top of the case, θ JC , is constant,
Junction Temperature and Maximum Power Dissipation
In a thermal steady state represented by the simplified schema-
tic shown in Figure 15, heat flow from the die is partly through
the top of the case, causing a temperature drop ( T J – T CASE ), and
partly through the PCB, causing a temperature drop ( T J – T PCB ).
The junction temperature is calculated as follows:
P = P CASE + P PCB = +
θ JC θ P CB
independent of the system variables, and well defined. θ JC
depends on the thermal resistance of the molding compound.
The thermal resistance of the system, θ JA , is system dependent
and therefore cannot be properly estimated. Although it is tra-
where:
T J =
θ JC θ PCB P + θ PCB T CASE + θ JC T PCB
θ JC + θ PCB
ditional to provide the thermal resistance of a JEDEC reference
system in the data sheet, its value may not be appropriate for all
systems and may result in large errors (>>25%).
The thermal resistance of production PCBs, θ JC , depends largely
on the particular PCB design, and, to some extent, the environ-
mental conditions specific to the particular system. Although θ JB
is traditionally not provided on data sheets, a thermal character-
ization parameter, ψ JB , of a JEDEC reference system is gaining
increasing acceptance. When the PCB thermal design near the
AD8383 closely approximates the PCB of the JEDEC reference
T J is the junction temperature
T CASE is the temperature of the top of the case (near the output
pins for the AD8383)
T PCB is the PCB temperature on the solder side (directly under
the AD8383)
P is the total power dissipated by the AD8383
θ JC is the thermal resistance of the top of the case
θ PCB is the thermal resistance of the PCB
At a given maximum allowed junction temperature, the
maximum allowed power dissipation is
P MAX = ?
system, θ JA approaches ψ JB .
For thermally enhanced packages, the thermal resistance of the
? ( θ JC + θ PCB )
? θ JC θ PCB
T JMAX ?
T CASE
θ JC
?
T PCB ?
θ PCB ??
exposed thermal paddle, θ JC-BOTTOM , is very low and may
therefore be ignored.
For a thermally optimized PCB, θ JC can be replaced with ψ PCB
and the equation can be rewritten as
? ( θ JC + ψ PCB )
P MAX = ?
? θ JC ψ PCB
T JMAX ?
T CASE
θ JC
?
T PCB ?
?
ψ PCB ?
Rev. 0 | Page 12 of 16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8384 | 制造商:AD 制造商全称:Analog Devices 功能描述:10-Bit, 6-Channel Decimating LCD DecDriver-R with Level Shifters |
| AD8384ASVZ | 功能描述:IC DRIVER LCD 6CH 10BIT 80-TQFP RoHS:是 类别:集成电路 (IC) >> PMIC - 显示器驱动器 系列:DecDriver™ 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 显示器类型:真空荧光 (VF) 配置:5 x 7（矩阵） 接口:串行 数字或字符:- 电流 - 电源:3.5mA 电源电压:2.7 V ~ 3.6 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SSOP（0.154"，3.90mm 宽） 供应商设备封装:16-QSOP 包装:带卷 (TR) |
| AD8385 | 制造商:AD 制造商全称:Analog Devices 功能描述:10-Bit, 12-Channel Decimating LCD DECDRIVER with Level Shifters |
| AD8385ASVZ | 制造商:Analog Devices 功能描述: |
| AD8386 | 制造商:AD 制造商全称:Analog Devices 功能描述:10-Bit, 12-Channel Output Decimating LCD Driver |
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