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參數資料
| 型號： | TPS65171RHAR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 4 A SWITCHED CAPACITOR REGULATOR, 900 kHz SWITCHING FREQ-MAX, PQCC40 |
| 封裝： | 6 X 6 MM, GREEN, PLASTIC, MO-220VJJD-2, VQFN-40 |
| 文件頁數： | 22/46頁 |
| 文件大小： | 3644K |
| 代理商： | TPS65171RHAR |
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2.5kW
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R18=open
R18=51kW
R18=20kW
R18=10kW
out
in
out
in
out
swpeak
out
in
swpeak
V
1. Converter Duty Cycle:
D =
V
D
2. Maximum output current: I
=
I
-
(1 D)
2fs×L
I
V
D
3. Peak switch current:
I
=
+
1 D
2fs
L
-
h -
-
÷
è
-
www.ti.com
SLVSA22A – OCTOBER 2009 – REVISED JANUARY 2010
Figure 30. Temperature Compensation Examples for R18 = open, 51 k
, 20 k, 10 k
Buck-Boost Converter Design Procedure
The first step in the design procedure is to verify whether the maximum possible output current of the buck-boost
converter supports the specific application requirements. To simplify the calculation, the fastest approach is to
estimate converter efficiency by taking the efficiency numbers from the provided efficiency curves or to use a
worst case assumption for the expected efficiency, e.g., 80%. The calculation must be performed for the
minimum assumed input voltage where the peak switch current is the highest. The inductor and external
Schottky diode have to be able to handle this current.
(32)
With,
Iswpeak = Converter peak switch current (minimum switch current limit = 0.8A)
fs = Converter switching frequency (typical 750 kHz)
L = Selected inductor value
h = Estimated converter efficiency (use the number from the efficiency curves or 0.8 as an assumption)
Copyright 2009–2010, Texas Instruments Incorporated
29
Product Folder Link(s): TPS65171
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| TPS65176RHDT | 功能描述:其他電源管理 LCD BIAS IC FOR TV RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
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