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參數(shù)資料
| 型號(hào)： | TPS6734I |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | FIXED 12-V 120-mA BOOST-CONVERTER SUPPLY |
| 中文描述： | 固定12伏120毫安升壓轉(zhuǎn)換器供電 |
| 文件頁數(shù)： | 13/19頁 |
| 文件大小： | 285K |
| 代理商： | TPS6734I |
TPS6734I
FIXED 12-V 120-mA BOOST-CONVERTER SUPPLY
SLVS127A – AUGUST 1995 – REVISED JANUARY 1999
13
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
bootstrapped output circuit
For operation below 2.7 V, the TPS6734 may be connected in a bootstrap configuration as shown in Figure 11.
The bootstrap configuration is less efficient (requires more supply current and suffers a loss in efficiency at
voltages below 5 V; see Figure 12) and is not recommended except for very low voltage operating conditions.
Because the output-driver stage, which benefits most from higher voltages, is diode-coupled to the output
voltage (see Figure 2), the bootstrapped configuration provides no benefit except at very low voltages. In the
shutdown mode (EN = low), no-load quiescent current is unchanged (3
μ
A max) whether in the bootstrap or the
typical configuration.
VCC
FB
OUT
GND
EN
REF
SS
COMP
1
2
3
4
8
7
6
5
TPS6734
0.001
μ
F
18
μ
H
1 A, 20 V
VI
2 V to 12 V
ENABLE
+
33
μ
F
VO
12 V, 120 mA
0.0047
μ
F
Figure 11. TPS6734 Bootstrap Configuration
82
80
76
74
10 20 30 40 50 60 70
%
72
84
EFFICIENCY
vs
OUTPUT CURRENT FOR TYPICAL AND BOOTSTRAP
86
Typical
80 90 100
140
78
110120 130
IO – Output Current – mA
70
68
66
Bootstrap
VCC = 5 V
Figure 12
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS6734ID | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 120mA 12V 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS6734IDG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 120mA 12V 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS6734IDR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 120mA 12V 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS6734IDRG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Fixed 12-V 120-MA Boost-Conv Supply 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS6734IP | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 120mA 12V 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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