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參數(shù)資料
| 型號： | MC34167 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準(zhǔn)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)： | 10/20頁 |
| 文件大小： | 263K |
| 代理商： | MC34167 |
MC34167, MC33167
http://onsemi.com
10
4
2
1
5
3
+
C
F
R
F
R
1
C
O
4700
V
O
5.05 V/5.0 A
R
2
EA
Reference
Thermal
Oscillator
S
R
Q
PWM
UVLO
ILIMIT
V
in
12 V
C
in
330
+
6.8 k
68 k
0.1
Q
1
D
1
1N5825
L
190 H
+
+
+
Test
Conditions
Results
Line Regulation
V
in
= 10 V to 36 V, I
O
= 5.0 A
V
in
= 12 V, I
O
= 0.25 A to 5.0 A
V
in
= 12 V, I
O
= 5.0 A
V
in
= 12 V, R
L
= 0.1
V
in
= 12 V, I
O
= 5.0 A
V
in
= 24 V, I
O
= 5.0 A
4.0 mV =
±
0.039%
1.0 mV =
±
0.01%
20 mV
pp
6.5 A
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
78.9%
82.6%
L = Coilcraft M1496A or General Magnetics Technology GMT0223, 42 turns of #16 AWG
on Magnetics Inc. 58350A2 core. Heatsink = AAVID Engineering Inc. 5903B, or 5930B.
The StepDown Converter application is shown in Figure 19. The output switch transistor Q
1
interrupts the input voltage, generating a
squarewave at the LC
O
filter input. The filter averages the squarewaves, producing a dc output voltage that can be set to any level between
V
in
and V
ref
by controlling the percent conduction time of Q
1
to that of the total oscillator cycle time. If the converter design requires an output
voltage greater than 5.05 V, resistor R
1
must be added to form a divider network at the feedback input.
Figure 19. StepDown Converter
ééééé
ééééé
ééééé
ééééé
ééééé
ééééé
(Top View)
Vin
VO
CO
Ci
L
RF
R
R1
D
+
+
+
+
Figure 20. StepDown Converter Printed Circuit Board and Component Layout
(Bottom View)
3.0
″
″
1
M
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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(fēng)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(fēng)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(fēng)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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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