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參數(shù)資料
| 型號： | BUF20820AIDCPR |
| 廠商： | Texas Instruments |
| 文件頁數(shù)： | 17/29頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC 18CH PROG V-REF GEN 38-HTSSOP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 應(yīng)用： | TFT-LCD 面板：伽瑪緩沖器，VCOM 驅(qū)動器 |
| 輸出類型： | 滿擺幅 |
| 電路數(shù)： | 18 |
| 電流 - 電源： | 18mA |
| 電流 - 輸出 / 通道： | 100mA |
| 電壓 - 電源，單路/雙路(±)： | 7 V ~ 18 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 38-TFSOP （0.173"，4.40mm 寬）裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 38-HTSSOP |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | 296-19400-6 |
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BUF20820
SBOS330E DECEMBER 2005 REVISED OCTOBER 2008
www.ti.com
24
OUTPUT PROTECTION
The BUF20820 output stages can safely source and sink
the current levels indicated in Figure 4. However,
precautions must be taken in certain situations in order to
prevent the output stages from being damaged by
excessive current flow. The outputs (OUT1-18, VCOM OUT1
and VCOM OUT2) include ESD protection diodes, as shown
in Figure 22. Normally, these diodes do not conduct and
are passive during typical device operation. Under certain
operating conditions where the diodes may conduct, they
can be subjected to high or even damaging current levels.
These conditions are most likely to occur when a voltage
applied to an output exceeds VS + 0.5V, or drops below
GND 0.5V.
One common scenario where these conditions can occur
is when the output pin is connected to a sufficiently large
capacitor, and the BUF20820 power-supply source (VS) is
suddenly removed. Removing the power-supply source
allows
the
capacitor
to
discharge
through
the
current-steering diodes. The energy released during the
high current flow period causes the power dissipation
limits of the diode to be exceeded. Protection against this
high
current
flow
may
be
provided
by
placing
current-limiting resistors in series with the output, as
shown in Figure 8. Select a resistor value that restricts the
current level to the maximum rating for the particular pin.
V
S
OUTX
or
V
COMX
ESD Current
Steering Diodes
BUF20820
Figure 22. Output Pins ESD Protection
Current-Steering Diodes
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| BUF20820AIDCPRE4 | 功能描述:LCD Gamma緩沖器 18-Ch Vltg Generator w/2 Prog VCOM Chs RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉(zhuǎn)換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
| BUF20820EVM | 功能描述:放大器 IC 開發(fā)工具 BUF20800-BUF20820 Eval Mod RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| BUF22821 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Programmable Gamma-Voltage Generator and VCOM Calibrator with Integrated Two-Bank Memory |
| BUF22821AIDCPR | 功能描述:LCD Gamma緩沖器 Prgrmbl Gam-Vltg Gen & Vcom Calibrator RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉(zhuǎn)換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
| BUF22821EVM | 功能描述:放大器 IC 開發(fā)工具 BUF22821EVM Eval Mod RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
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