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參數(shù)資料
| 型號： | TPS61090EVM-029 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | TPS61090 Evaluation Module(TPS61090評估模塊) |
| 中文描述： | TPS61090評估模塊（TPS61090評估模塊） |
| 文件頁數(shù)： | 12/18頁 |
| 文件大?。?/td> | 224K |
| 代理商： | TPS61090EVM-029 |
Operation
2-3
Setup
2.3
Operation
The EVM has been optimized to operate from a 2-cell NiCad, NiMH, and
alkaline battery with input voltage range down to 1.8V. The output voltage is
set to 5.0V and is capable of supplying 500mA. After connecting the input
and output connections, and setting the SYNC jumper (JP1) to the desired
setting, turn on the input supply and then enable the output as desired with
JP2.
The resistor divider on the LBI pin is designed to trip the LBO output when
the input supply voltage drops below 1.8V.
To reduce the total PCB design area, the inductor used on the EVM is
smaller than the inductor used in characterization curves in the data sheet.
Generally, smaller size inductors decrease the efficiency in the design.
Figure 21 shows the efficiency vs I
OUT
curve for the TPS61090EVM.
Figure 21.Efficiency vs I
OUT
for the TPS61090EVM
0
100
90
80
70
60
50
40
30
20
10
1
10
100
1000
10000
Output Current (mA)
E
V
IN
= 2.4
V
IN
= 3.3
Figure 22 shows the typical maximum output current vs input voltage for this
EVM. The maximum output current of the EVM is slightly less than what is
shown in the data sheet. This difference is because the EVM uses a smaller
value inductor with a smaller footprint to save board area.
Figure 22.Maximum Output Current vs V
BAT
2.0
1.5
1.0
0.5
0
Input Voltage, V
BAT
(V)
M
1.8
2.2
2.6
3.0
3.4
3.8
4.2
4.6
5.0
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