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參數(shù)資料
| 型號： | MC34167 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C |
| 中文描述： | 射頻放大器 |
| 文件頁數(shù)： | 16/20頁 |
| 文件大?。?/td> | 263K |
| 代理商： | MC34167 |
MC34167, MC33167
http://onsemi.com
16
Table 1. Design Equations
Calculation
StepDown
StepUp/Down
VoltageInverting
ton
toff
(Notes 1, 2)
Vout
VF
Vin
Vsat
Vout
Vout
VF1
VF2
VsatQ2
Vin
VsatQ1
|Vout|
Vin
VF
Vsat
t
on
ton
toff
ton
toff
fosc
1
ton
toff
ton
toff
fosc
1
ton
toff
ton
toff
fosc
1
Duty Cycle
(Note 3)
t
on
f
osc
t
on
f
osc
t
on
f
osc
I
L avg
I
out
Iout
ton
toff
1
Iout
ton
toff
1
I
pk(switch)
IL avg
IL
2
IL avg
IL
2
IL avg
IL
2
L
Vin
Vsat
Vout
IL
ton
Vin
VsatQ1
VsatQ2
IL
ton
Vin
Vsat
IL
ton
V
ripple(pp)
IL
1
8foscCo
2
(ESR)2
ton
toff
1
1
foscCo
2
(ESR)2
ton
toff
1
1
foscCo
2
(ESR)2
V
out
Vref
R2
R1
1
Vref
R2
R1
1
Vref
R2
R1
1
1. V
sat
Switch Output source saturation voltage, refer to Figure 8.
2. V
Output rectifier forward voltage drop. Typical value for 1N5822 Schottky barrier rectifier is 0.35 V.
3. Duty cycle is calculated at the minimum operating input voltage and must not exceed the guaranteed minimum DC
(max)
specification of 0.92.
The following converter characteristics must be chosen:
V
out
I
out
I
L
Desired peaktopeak inductor ripple current. For maximum output current especially when the duty cycle is greater than 0.5,
it is suggested that I
L
be chosen minimum current limit threshold of 5.5 A. If the design goal is to use a minimum inductance
value, let I
L
= 2 (I
L avg
). This will proportionally reduce the converter’s output current capability.
Desired peaktopeak output ripple voltage. For best performance, the ripple voltage should be kept to less than 2% of V
out
.
Capacitor C
O
should be a low equivalent series resistance (ESR) electrolytic designed for switching regulator applications.
V
ripple(pp)
Desired output voltage.
Desired output current.
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相關(guān)代理商/技術(shù)參數(shù) |
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| MC34167_05 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:5.0 A, Step−Up/Down/Inverting Switching Regulators |
| MC34167D2T | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 40V 5A 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 |
| MC34167D2TG | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 40V 5A Buck/Boost/Inverting 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 |
| MC34167D2TR4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 40V 5A 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 |
| MC34167D2TR4G | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 40V 5A Buck/Boost/Inverting 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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