- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄225340 > TPS65166RHAR (TEXAS INSTRUMENTS INC) SPECIALTY ANALOG CIRCUIT, PQCC40 PDF資料下載
參數(shù)資料
| 型號(hào)： | TPS65166RHAR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQCC40 |
| 封裝： | 6 X 6 MM, GREEN, PLASTIC, M0-220VJJD-2, QFN-40 |
| 文件頁數(shù)： | 17/45頁 |
| 文件大小： | 3690K |
| 代理商： | TPS65166RHAR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁當(dāng)前第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁
out
in
out
swpeak
in
swpeak
out
V
1. Converter Duty Cycle:
D =
V
(1
D)
= I
D
2fs×L
V
(1 D)
3. Peak switch current:
I
= I
+
D
2fs
L
h
-
-
(15)
Inductor Selection (Buck Converter)
Rectifier Diode Selection (Buck Converter)
SLVS976 – SEPTEMBER 2009.......................................................................................................................................................................................... www.ti.com
With;
Iswpeak = Converter peak switch current (minimum switch current limit = 2.6A)
fs = Converter switching frequency (typical 750kHz)
L = Selected inductor value
η = Estimated converter efficiency (use the number from the efficiency curves or 0.8 as an assumption)
The buck converter is able to operate with 6.8
H to 15H inductors, a 10H inductor is typical. The main
parameter for inductor selection is the saturation current of the inductor which should be higher than the
maximum output current plus the inductor ripple current as calculated in the Design Procedure section. The
highest inductor current occurs at maximum VIN. The alternative more conservative approach is to choose an
inductor with saturation current at least as high as the minimum switch current limit of 2.6A. Another important
parameter is the inductor dc resistance. Usually the lower the dc resistance the higher the efficiency; the type
and core material of the inductor influences the efficiency as well. The efficiency difference among inductors can
vary up to 10%. Possible inductors are shown in Table 6.
Table 6. Inductor Selection Buck Converter
INDUCTOR VALUE
COMPONENT SUPPLIER
SIZE (L×W×H mm)
Isat/DCR
10
H
Sumida CDRH6D38
7.0 × 7.0 × 4.0
2.0A/28m
10
H
Sumida CDRH8D28
8.3 × 8.3 × 3
2.5A/36m
10
H
Sumida CDRH103R
10.3 × 10.5 × 3.1
3.2A/45m
To achieve high efficiency, a Schottky diode should be used. The reverse voltage rating should be higher than
the maximum output voltage of the buck converter. The average rectified forward current Iavg, the Schottky diode
needs to be rated for, is calculated as the off time of the buck converter times the output current.
Iavg = Iout × (1 – D)
(16)
Usually a Schottky diode with a 2A maximum average rectified forward current rating is sufficient for most
applications. The Schottky rectifier can be selected with lower forward current capability depending on the output
current Iout, but has to be able to dissipate the power. The dissipated power is the average rectified forward
current times the diode forward voltage. The efficiency rises with lower forward voltage.
PD = Iavg × Vforward
(17)
Table 7. Rectifier Diode Selection (Buck Converter)
Vr/Iavg
Vforward
RθJA
SIZE
COMPONENT SUPPLIER
20V/2A
0.44V at 2A
25°C/W
SMA
B220A, DIODES Incorporated
20V/2A
0.5V at 2A
75°C/W
SMB
SS22, Vishay Semiconductor
20V/3A
0.5V at 3A
50°C/W
SMA
B320A, DIODES Incorporated
24
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): TPS65166
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS65270RGET | DUAL SWITCHING CONTROLLER, 1400 kHz SWITCHING FREQ-MAX, PQCC24 |
| TPS65562RGTTG4 | 3 A BATTERY CHARGE CONTROLLER, PQCC16 |
| TPS65735RSNR | SPECIALTY ANALOG CIRCUIT, PQCC32 |
| TPS70702PWP | DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS WITH POWER UP SEQUENCING FOR SPLIT VOLTAGE DSP SYSTEMS |
| TPS70745PWP | DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS WITH POWER UP SEQUENCING FOR SPLIT VOLTAGE DSP SYSTEMS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS65167ARHAR | 功能描述:其他電源管理 Compact LCD Bias Sply 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| TPS65167ARHARG4 | 功能描述:其他電源管理 Compact LCD Bias Sply 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| TPS65167EVM-277 | 功能描述:電源管理IC開發(fā)工具 TPS65167 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS65167RHAR | 功能描述:其他電源管理 Compact LCD Bias Supply 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| TPS65167RHARG4 | 功能描述:LCD 驅(qū)動(dòng)器 12V/3.5A(I/O) 4-CH Multi-Converter RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。