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參數(shù)資料
| 型號： | EL5825IR-T7 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | 8-Channel TFT-LCD Reference Voltage Generator |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO24 |
| 封裝： | MO-153, TSSOP-24 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 638K |
| 代理商： | EL5825IR-T7 |
8
FN7005.4
June 24, 2005
Internal Refresh Clock Oscillator
The EL5825 requires an internal clock or external clock to
refresh its outputs. The outputs are refreshed at the falling
OSC clock edges. The output refreshed switches open at
the rising edges of the OSC clock. The driving load shouldn’t
be changed at the rising edges of the OSC clock. Otherwise,
it will generate a voltage error at the outputs. This clock may
be input or output via the clock pin labeled OSC. The internal
clock is provided by an internal oscillator running at
approximately 25kHz and can be output to the OSC pin. In a
multiple chip system, if the driving loads are stable, one chip
may be programmed to use the internal oscillator; then the
OSC pin will output the clock from the internal oscillator.
Subsequent chips may have the OSC pin connected to this
clock source. In these chips, the program will set them to
external OSC Mode by setting bit 14 to 1. See the control
bits logic table and serial programming example for details.
For transient load application, the external clock Mode
should be used to ensure all functions are synchronized
together. The positive edge of the external clock to the OSC
pin should be timed to avoid the transient load effect. The
Application Drawing on page 10 shows the LCD H rate
signal used, here the positive clock edge is timed to avoid
the transient load of the column driver circuits.
After power on, the chip will start with the internal oscillator
mode. At this time, the OSC pin will be in a high impedance
condition to prevent contention. After programming the
oscillator with bit 14, the pin will be set to the appropriate
mode.
Transfer Function
The transfer function is:
where data is the decimal value of the 10-bit data binary
input code.
The output voltages from the EL5825 will be derived from
the reference voltages present at the V
REFL
and V
REFH
pins. The impedance between those two pins is about 32k
.
Care should be taken that the system design holds these
two reference voltages within the limits of the power rails of
the EL5825. GND < V
REFH
≤
V
S
and GND
≤
V
REFL
≤
V
REFH
.
In some LCD applications that require more than 8 channels,
the system can be designed such that one EL5825 will
provide the Gamma correction voltages that are more
positive than the V
COM
potential. The second EL5825 can
provide the Gamma correction voltage more negative than
the V
COM
potential. The Application Drawing on page 10
shows a system connected in this way.
Block Diagram
V
OUT IDEAL
)
V
REFL
=
------------
V
REFH
- V
REFL
(
)
×
+
VOLTAGE
SOURCES
EIGHT
CHANNEL
REGISTERS
CONTROL IF
SERIAL DATA INPUT
SERIAL CLOCK
ENABLE
OSCILLATOR INPUT/OUTPUT3
SERIAL DATA OUTPUT
CAP
REFERENCE LOW
OUTH
OUTG
OUTF
OUTE
OUTD
OUTC
OUTB
OUTA
REFERENCE HIGH
EL5825
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
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| EL5825IRZ-T13 | 功能描述:IC VREF GEN 8CH TFT-LCD 24-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| EL5825IRZ-T7 | 功能描述:IC VREF GEN 8CH TFT-LCD 24-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
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| E-L5970D | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.2 to 35V Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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