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參數(shù)資料
| 型號： | TPS62000 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | "Adjustable |
| 中文描述： | 可調(diào)節(jié) 600mA 95% 高效降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 7/26頁 |
| 文件大小： | 460K |
| 代理商： | TPS62000 |
TPS62000, TPS62001, TPS62002, TPS62003
TPS62004, TPS62005, TPS62006, TPS62007, TPS62008
HIGHEFFICIENCY STEPDOWN LOW POWER DCDC CONVERTER
SLVS294D SEPTEMBER 2000 REVISED MARCH 2006
15
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
adjustable output voltage version
When the adjustable output voltage version (TPS62000DGS) is used, the output voltage is set by the external
resistor divider (see Figure 15).
The output voltage is calculated as:
V
O +
0.45 V
1
) R1
R2
With R1 + R2
≤ 1 M
R1 + R2 should not be greater than 1 M
because of stability reasons.
For stability reasons, a small bypass capacitor (Cff) is required in parallel to the upper feedback resistor, refer
to Figure 15. The bypass capacitor value can be calculated as:
C
(ff) +
1
2
π x 30000 x R1
for Co t 47 F
C
(ff) +
1
2
π x 5000 x R1
for Co ≥ 47 F
R1 is the upper resistor of the voltage divider. For C(ff), choose a value which comes closest to the computed
result.
VIN
1
8
6
7
32
9
5
10
4
L1 = 10
H
EN
ILIM
SYNC
GND
FC
PG
PGND
FB
L
TPS62000
+
Co = 10 F
VO = 2.5 V/600 mA
C3 = 0.1
F
Ci = 10 F
VI = 2.7 V to 5.5 V
R3 = 320 k
R1 = 820 k
C(ff) =
6.8 pF
R2 = 180 k
+
PG
Figure 15. Typical Application Circuit for Adjustable Output Voltage Option
inductor selection
A 10
H minimum output inductor is used with the TPS6200x. Values larger than 22 H or smaller than 10 H
may cause stability problems because of the internal compensation of the regulator.
For output voltages greater than 1.8 V, a 22
H inductance might be used in order to improve the efficiency of
the converter.
After choosing the inductor value of typically 10
H, two additional inductor parameters should be considered:
first the current rating of the inductor and second the dc resistance.
The dc resistance of the inductance influences directly the efficiency of the converter. Therefore, an inductor
with lowest dc resistance should be selected for highest efficiency.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS62000DGS | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Adj 600mA Hi-Eff Step-Down 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 |
| TPS62000DGS | 制造商:Texas Instruments 功能描述:BUCK CONVERTER ADJ O/P SMD 62000 |
| TPS62000DGS | 制造商:Texas Instruments 功能描述:HIGH EFFICIENCY STEP-DOWN CONVERTER :ROH |
| TPS62000DGSG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Adj 600mA Hi-Eff Step-Down 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 |
| TPS62000DGSR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Adj 600mA Hi-Eff Step-Down 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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