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參數(shù)資料
| 型號(hào)： | EL5625ILZ-T13 |
| 廠(chǎng)商： | Intersil |
| 文件頁(yè)數(shù)： | 3/12頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC BUFFER 18XGAMMA PROG 38-QFN |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 應(yīng)用： | TFT-LCD 面板：伽瑪緩沖器，VCOM 驅(qū)動(dòng)器 |
| 輸出類(lèi)型： | 滿(mǎn)擺幅 |
| 電路數(shù)： | 18 |
| 電流 - 電源： | 11mA |
| 電流 - 輸出 / 通道： | 130mA |
| 電壓 - 電源，單路/雙路(±)： | 7 V ~ 16 V |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 38-VFQFN 裸露焊盤(pán) |
| 供應(yīng)商設(shè)備封裝： | 38-QFN（5x7）裸露焊盤(pán) |
| 包裝： | 帶卷 (TR) |
11
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FN7488.1
February 20, 2008
At the falling edge of the OSC, output 1 is being refreshed
and one clock cycle later, output 2 is being refreshed. The
spike you see here is the response of the output amplifier
when the refreshed switches are closed. When driving a big
capacitor load, there will be ringing at the spikes because
the phase margin of the amplifier is decreased.
The speed of the external OSC signal shouldn’t be greater
than 70kHz because for the worst condition, it will take at
least 4s to charge the sample and hold capacitor CH. The
pulse width has to be at least 4s long. From our lab test, the
duty cycle of the OSC signal must be greater than 30%.
POWER DISSIPATION
With the 100mA maximum continues output drive capability
for VCOM channel, it is possible to exceed the 125°C
absolute maximum junction temperature. Therefore, it is
important to calculate the maximum junction temperature for
the application to determine if load conditions need to be
modified for the part to remain in the safe operation.
The maximum power dissipation allowed in a package is
determined according to:
where:
TJMAX = Maximum junction temperature
TAMAX = Maximum ambient temperature
θJA = Thermal resistance of the package
PDMAX = Maximum power dissipation in the package
The maximum power dissipation actually produced by the IC
is the total quiescent supply current times the total power
supply voltage and plus the power in the IC due to the loads.
when sourcing, and:
when sinking.
Where:
i = 18
VS = Supply voltage
IS = Quiescent current
VOUTi = Output voltage of the i channel
ILOADi = Load current of the i channel
By setting the two PDMAX equations equal to each other, we
can solve for the RLOADs to avoid the device overheat. The
package power dissipation curves provide a convenient way
to see if the device will overheat.
THERMAL SHUTDOWN
The EL5625 has an internal thermal shutdown circuitry that
prevents overheating of the part. When the junction
temperature goes up to about 150°C, the part will be
disabled. When the junction temperature drops down to
about 120°C, the part will be enabled. With this feature, any
short circuit at the outputs will enable the thermal shutdown
circuitry to disable the part.
POWER SUPPLY BYPASSING AND PRINTED CIRCUIT
BOARD LAYOUT
Good printed circuit board layout is necessary for optimum
performance. A low impedance and clean analog ground
plane should be used for the EL5625. The traces from the
two ground pins to the ground plane must be very short. The
thermal pad of the EL5625 should be connected to the
analog ground plane. Lead length should be as short as
possible and all power supply pins must be well bypassed. A
0.1F ceramic capacitor must be place very close to the VS,
VREFH, VREFL, and CAP pins. A 4.7F local bypass
tantalum capacitor should be placed to the VS, VREFH, and
VREFL pins.
P
DMAX
T
JMAX - TAMAX
Θ
JA
---------------------------------------------
=
P
DMAX
V
S
I
S
Σ V
S
(
- V
OUTi )
I
LOADi
×
[]
+
×
=
P
DMAX
V
S
I
S
Σ V
OUTiILOADi
×
()
+
×
=
EL5625
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| EL5724 | 制造商:INTERSIL 制造商全稱(chēng):Intersil Corporation 功能描述:Integrated Buffers with VCOM |
| EL5724IRE | 功能描述:IC INTEGRATED BUFFER 24-HTSSOP RoHS:否 類(lèi)別:集成電路 (IC) >> 線(xiàn)性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)用:驅(qū)動(dòng)器 輸出類(lèi)型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)換速率:1000 V/µs 電流 - 電源:14.5mA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安裝類(lèi)型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:20-QFN 裸露焊盤(pán)（4x4） 包裝:帶卷 (TR) |
| EL5724IRE-T13 | 功能描述:IC BUFFER 8XGAMMA 8.3MA 24HTSSOP RoHS:否 類(lèi)別:集成電路 (IC) >> 線(xiàn)性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動(dòng)器 輸出類(lèi)型:滿(mǎn)擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類(lèi)型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
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