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參數資料
| 型號： | TPS65131RGETG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 2.2 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封裝： | 4 X 4 MM, GREEN, PLASTIC, QFN-24 |
| 文件頁數： | 16/34頁 |
| 文件大?。?/td> | 785K |
| 代理商： | TPS65131RGETG4 |
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APPLICATION INFORMATION
Design Procedure
Programming the Output Voltage
R1 + R2
V
POS
V
REF
* 1
(1)
VPOS
VNEG
Q1
L1
D1
C1
4.7 mF
U1
C2
4.7 mF
C3
0.1 mF
VPOS
FBP
VREF
FBN
VNEG
OUTN
CP
CN
PGND
INP
BSW
INN
VIN
ENP
PSP
ENN
PSN
GND
TPS65130
R1
R2
C4
4x4.7 mF
R4
R3
D2
C8
0.22 mF
L2
4.7 mH
C7
C6
R7
4.7 mH
R8
C9
R9
C10
VIN
C5
4x4.7 mF
TPS65130, TPS65131
SLVS493B – MARCH 2004 – REVISED SEPTEMBER 2004
The TPS65130/1 dc-dc converter is intended for systems typically powered by a single-cell Li-ion or Li-polymer
battery with a terminal voltage between 2.7 V up to 4.2 V. Because the recommended input voltage goes up to
5.5 V, the device is also suitable for 3-cell alkaline, NiCd, or NiMH batteries, as well as any regulated supply
voltages between 2.7 V and 5.5 V. It provides two independent output voltage rails which are programmed as
follows.
Boost Converter
The output voltage of the TPS65130/1 boost converter stage can be adjusted with an external resistor divider
connected to the FBP pin. The typical value of the voltage at the FBP pin is the reference voltage, which is 1.213
V. The maximum recommended output voltage at the boost converter is 15 V. To achieve appropriate accuracy,
the current through the feedback divider should be about 100 times higher than the current into the FBP pin.
Typical current into the FBP pin is 0.05 A, and the voltage across R2 is 1.213 V. Based on those values, the
recommended value for R2 should be lower than 200 k in order to set the divider current at 5 A or higher.
Depending on the needed output voltage (VPOS), the value of the resistor R1 can then be calculated using
Equation 1:
As an example, if an 8-V output is needed, and a resistor of 180 k
has been chosen for R
2, a 1-M resistor is
needed to program the desired output voltage.
Inverting Converter
The output voltage of the TPS65130/1 inverting converter stage can also be adjusted with an external resistor
divider. It must be connected to the FBN pin. In difference to the feedback divider at the boost converter, the
reference point of the feedback divider is not GND; it is VREF. So the typical value of the voltage at the FBN pin is
0 V. The minimum recommended output voltage at the inverting converter is –15 V. Feedback divider current
23
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| TPS65132B2YFFR | 功能描述:DUAL OUTPUT LCD BIAS 15DSBGA 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態:有效 顯示類型:LCD，OLED 配置:- 接口:I2C 數字或字符:- 電流 - 電源:540μA 電壓 - 電源:2.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:15-UFBGA，DSBGA 供應商器件封裝:15-DSBGA 標準包裝:1 |
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