欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數(shù)資料
型號: TPS62223DDC
廠商: Texas Instruments, Inc.
英文描述: 400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23
中文描述: 400毫安,1.25 MHz的,高效率,降壓型轉(zhuǎn)換器薄,SOT23封裝
文件頁數(shù): 14/20頁
文件大小: 464K
代理商: TPS62223DDC
www.ti.com
C2
1
2
P
R2
1
2
8 kHz
R2
V
I
GND
EN
SW
FB
C3
4.7
μ
F
L1
4.7
μ
H
C4
10
μ
F
TPS62220
V
I
2.5 V 6 V
V
O
1.8 V / 400 mA
R1
470k
R2
180k
C1
15 pF
C2
100 pF
INDUCTOR SELECTION
For high efficiencies, the inductor should have a low dc resistance to minimize conduction losses. Especially at
high switching frequencies the core material has a higher impact on efficiency. When using small chip inductors,
the efficiency is reduced mainly due to higher inductor core losses. This needs to be considered when selecting
the appropriate inductor. The inductor value determines the inductor ripple current. The larger the inductor value,
the smaller the inductor ripple current and the lower the conduction losses of the converter. Conversely, larger
inductor values cause a slower load transient response. To avoid saturation of the inductor, the inductor should
be rated at least for the maximum output current of the converter plus the inductor ripple current that is
calculated as
IL
Vout
1–Vout
Vin
L
f
I
Lmax
I
outmax
IL
2
f = switching frequency (1.25 MHz typical, 800 kHz minimal)
L = inductor value
I
L
= peak-to-peak inductor ripple current
I
Lmax
= maximum inductor current
TPS62220, TPS62221, TPS62222
TPS62223, TPS62224
TPS62228, TPS62229
SLVS491C–SEPTEMBER 2003–REVISED SEPTEMBER 2004
The pole is calculated as:
with R2 = lower resistor of voltage divider and C2 = lower capacitor of voltage divider.
For an output filter combination of L = 4.7 μH and C
O
= 10 μF; C1 and C2 need to be selected to place a zero at
22 kHz and a pole at 8 kHz. Choose components close to the calculated values.
Table 2. Compensation Selection
L
C
O
f
Z
f
P
4.7 μH
10 μF, 22 μF
22 kHz
8 kHz
Figure 15. Typical Application Circuit for the TPS62220 With Adjustable Output Voltage
The highest inductor current occurs at maximum Vin. A more conservative approach is to select the inductor
current rating just for the maximum switch current of 880 mA. SeeTable 3 for inductor selection.
14
相關(guān)PDF資料
PDF描述
TPS6222 400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23
TPS62228DDC 400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23
TPS62304DRC 500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING
TPS62304YZD 500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING
TPS62315YZ 500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS62223DDCR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2.3V Out 400mA 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS62223DDCRG4 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2.3V Out 400mA 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS62223DDCT 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2.3V Out 400mA 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS62223DDCTG4 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2.3V Out 400mA 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS62224DDCR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.6V Out 400mA 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
主站蜘蛛池模板: 威海市| 福州市| 古蔺县| 增城市| 贞丰县| 朔州市| 平顶山市| 门头沟区| 上饶县| 津南区| 集安市| 孟津县| 历史| 永善县| 闸北区| 景德镇市| 邛崃市| 华亭县| 乐昌市| 清远市| 体育| 佛坪县| 杂多县| 都江堰市| 淮北市| 潜江市| 敖汉旗| 镇雄县| 鹿泉市| 梁山县| 云浮市| 平凉市| 贺州市| 西吉县| 水城县| 泰来县| 建德市| 饶阳县| 泾源县| 云霄县| 法库县|