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(yè)數(shù)： 19/28頁(yè)
文件大?。?/td> 515K
代理商： TPS60251RTW
www.ti.com
C1+
SDAT
DS1 DS2 DM5
VIO
NC
GND
GND
NC-G
NC
DM1
DM2
DM3
DM4
IS
ENA
GND
C1-
C2+
C2-
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
Auxiliary Port for Key Pad
or Flash Light
R1
562 k
W
330
W
m
LAYOUT GUIDELINES
There are several points to consider when laying out a PCB for charge pump based solutions. In general, all
capacitors should be as close as possible to the device. This is especially important when placing the flying
capacitors (C2, C3 in
Figure 20
and
Figure 21
). To provide accurate WLED current, the current path with the
current setting resistor must be short to avoid any interference from other switching components. In cases where
DM5 is assigned for torch/flash applications, with a maximum 80-mA WLED current, this current path must be
kept wide to reduce the trace resistance.
TPS60251
SLVS767–APRIL 2007
Figure 21. The Typical Application Circuit for Sub, Main, and Keypad Backlight
Figure 21
shows the typical application circuit for sub, main, and keypad backlight. In this application, DM5 is
assigned as the auxiliary input for the keypad lighting application.
19
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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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