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參數(shù)資料
| 型號： | TPS6734IP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.5 A SWITCHING REGULATOR, 170 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | ROHS COMPLIANT, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 3/22頁 |
| 文件大?。?/td> | 479K |
| 代理商： | TPS6734IP |
TPS6734I
FIXED 12-V 120-mA BOOST-CONVERTER SUPPLY
SLVS127A – AUGUST 1995 – REVISED JANUARY 1999
11
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
efficiency
Typical efficiency for the converter circuit shown in Figure 13 is plotted in Figure 10. The efficiency falls off rapidly
at very light currents because the supply current is a significant percentage of the load.
82
80
76
74
10 20 30 40 50 60 70
%
–
Efficiency
84
86
EFFICIENCY
vs
OUTPUT CURRENT
88
80 90 100
140
78
110 120 130
IO – Output Current – mA
VCC = 5.5 V
VCC = 5 V
VCC = 4.5 V
Figure 10
inductor selection
Inductance value is directly proportional to the input voltage and inversely proportional to the output power. The
18
H shown in the typical circuit is the proper value for operation from 5-V sources up to 2-W loads. A lower
inductance value should be used when operating from 3-V sources. Operation from 7 V and higher sources may
require inductance values greater than 18
H. The inductor’s saturation current rating should be greater than
three times the dc load current for 5-V inputs and five times the dc load for 3-V inputs.
output filter capacitor selection
The output filter capacitor should be selected for minimum ESR (equivalent series resistance). Capacitor
ESR
× IL (change in inductor current) determines the amplitude of the high-frequency ripple on the output
voltage. The ESR of the capacitor should be less than 0.25
to keep the output ripple less than 50 mV
peak-to-peak over the entire current range (using 18-
H inductor).
diode
A Schottky diode or a high-speed silicon rectifier should be used. The continuous current rating of the diode
should be at least 300 mA for full load (120 mA) operation.
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| TPS6735EVM | 功能描述:電源管理IC開發(fā)工具 Neg 5V 200mA Vout DC/DC Inverter RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS6735ID | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 200mA 12V DC/DC RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS6735ID | 制造商:Texas Instruments 功能描述:IC's |
| TPS6735IDG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Fixed Neg 5-V 200-MA Inv DC/DC Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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