- 您現在的位置：買賣IC網 > PDF目錄373945 > AD8383ACPZ (ANALOG DEVICES INC) Low Cost 10-Bit, 6-Channel Output Decimating LCD DecDriver PDF資料下載
參數資料
| 型號： | AD8383ACPZ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 顯示驅動器 |
| 英文描述： | Low Cost 10-Bit, 6-Channel Output Decimating LCD DecDriver |
| 中文描述： | LIQUID CRYSTAL DISPLAY DRIVER, QCC48 |
| 封裝： | 7 X 7 MM, 0.85 MM HEIGHT, MO-220VKKD-2, LFCSP-48 |
| 文件頁數： | 12/16頁 |
| 文件大小： | 376K |
| 代理商： | AD8383ACPZ |
AD8383
Rev. 0 | Page 12 of 16
AD8383
PCB
C
PCB
θ
PCB
T
PCB
θ
JC
θ
JC-BOTTOM
C
JC-BOTTOM
T
J
C
AIR-PCB
θ
AIR-PCB
C
AIR-CASE
θ
AIR-CASE
T
A
T
AMBIENT
C
JC
T
CASE
C
P
θ
,
ψ
θ
θ
JB
,
ψ
JB
0
Figure 14. Thermal Equivalent Circuit
ESTIMATED JUNCTION TEMPERATURE
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
of one AD8383 mounted on a PCB is shown in Figure 14.
The thermal resistance of the top of the case, θ
JC
, is constant,
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-
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
system, θ
JA
approaches ψ
JB
.
For thermally enhanced packages, the thermal resistance of the
exposed thermal paddle, θ
JC-BOTTOM
, is very low and may
therefore be ignored.
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:
CB
P
PCB
J
JC
CASE
J
PCB
CASE
P
θ
T
T
(
θ
T
T
(
P
P
)
)
+
=
+
=
PCB
JC
PCB
JC
CASE
θ
PCB
PCB
JC
J
θ
T
θ
T
+
θ
θ
θ
T
+
+
=
where:
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
(
)
+
θ
=
PCB
PCB
JC
CASE
θ
JMAX
PCB
JC
PCB
JC
θ
MAX
P
θ
T
T
T
θ
θ
For a thermally optimized PCB,
θ
JC
can be replaced with
ψ
PCB
and the equation can be rewritten as
(
)
+
ψ
=
PCB
PCB
JC
CASE
θ
JMAX
PCB
JC
PCB
JC
θ
MAX
P
ψ
T
T
T
ψ
θ
相關PDF資料 |
PDF描述 |
|---|---|
| AD8391 | xDSL Line Driver 3 V to 12 V with Power-Down |
| AD8391AR | xDSL Line Driver 3 V to 12 V with Power-Down |
| AD8391AR-EVAL | xDSL Line Driver 3 V to 12 V with Power-Down |
| AD8391AR-REEL | xDSL Line Driver 3 V to 12 V with Power-Down |
| AD8391AR-REEL7 | xDSL Line Driver 3 V to 12 V with Power-Down |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8384 | 制造商:AD 制造商全稱: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 類別:集成電路 (IC) >> PMIC - 顯示器驅動器 系列:DecDriver™ 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 顯示器類型:真空熒光 (VF) 配置:5 x 7（矩陣） 接口:串行 數字或字符:- 電流 - 電源:3.5mA 電源電壓:2.7 V ~ 3.6 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-SSOP（0.154"，3.90mm 寬） 供應商設備封裝:16-QSOP 包裝:帶卷 (TR) |
| AD8385 | 制造商:AD 制造商全稱: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 制造商全稱:Analog Devices 功能描述:10-Bit, 12-Channel Output Decimating LCD Driver |
發布緊急采購，3分鐘左右您將得到回復。