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參數(shù)資料
| 型號(hào)： | TPS60251RTW |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | HIGH EFFICIENCY CHARGE PUMP FOR 7 WLEDs WITH I2C INTERFACE |
| 中文描述： | 高效電荷泵7，帶有I2C接口個(gè)WLED |
| 文件頁數(shù)： | 18/28頁 |
| 文件大?。?/td> | 515K |
| 代理商： | TPS60251RTW |
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APPLICATION CIRCUITS
C1+
SDAT
DS1 DS2 DM5
VIO
NC
GND
GND
NC-G
NC
DM1
DM2
DM3
DM4
IS
ENA
GND
C2+
C2-
C1-
VOUT
VIN
Main Display
C1
1 F
m
C4
4.7 F
C2
1 F
m
C3
1 F
m
Sub Display
SCLK
I2C Interface
1.8V for I/O
Input
R1
562 k
W
m
Light
I
O
V
F
V
in
I
O
I
op
(7)
TPS60251
SLVS767–APRIL 2007
Figure 20. The Typical Application Circuit for Sub and Main Display
As shown in
Figure 20
, this is a typical application circuit for a clam shell phone with 5 main LEDs and 2 sub
LEDs. Recently, the LCD panel makers have developed a new panel that has improved the transparency rate
which makes system efficiency with a 100-
μ
A LED current a critical load point. To meet system efficiency
requirements with the light load conditions for the new LCD operating panel, the TPS60251 has a maximum
55-
μ
A operating current with the 100-
μ
A output load condition. In this application, the controller always operates
in 1
×
mode due to the WLED's low forward voltage drop (about 2.6V
F
with a 100-
μ
A WLED current). Thus, the
total efficiency at a light load condition is determined using
Equation 7
:
Where:
I
O
: Output Load (WLED) Current
V
F
: Forward Voltage Drop of WLED
V
in
: Input Voltage
I
op
: Operating Current of LED Driver
18
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS60251RTWR | 功能描述:LED照明驅(qū)動(dòng)器 High Eff Charge Pump RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS60251RTWRG4 | 功能描述:LED照明驅(qū)動(dòng)器 High Eff Charge Pump RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS60251RTWT | 功能描述:LED照明驅(qū)動(dòng)器 High Eff Charge Pump RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS60251RTWT | 制造商:Texas Instruments 功能描述:DC/DC Charge Pump Converter IC |
| TPS60251RTWTG4 | 功能描述:LED照明驅(qū)動(dòng)器 High Eff Charge Pump RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
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