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| 型号： | TPS60252RTETG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.65 A SWITCHED CAPACITOR CONVERTER, 750 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, QFN-16 |
| 文件页数： | 9/25页 |
| 文件大小： | 762K |
| 代理商： | TPS60252RTETG4 |
C1-
C2+
C2-
C1+
DM1
DM5
DS 2
DS 1
DM3
DM 4
DM2
GND
SDAT
SCLK
VIN
C1
C
2
1mF
C3
1mF
MainDisplay
C4
SubDisplay
I
2CInterface
On/Off, DigitalDimming
VOUT
AuxiliaryPortforKeyPad
orFlashLight
4.7 F
m
4.7 F
m
LAYOUT GUIDELINES
www.ti.com............................................................................................................................................................ SLVS769C – APRIL 2007 – REVISED APRIL 2008
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.
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). 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.
Copyright 2007–2008, Texas Instruments Incorporated
17
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