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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)： | 11/20頁 |
| 文件大?。?/td> | 263K |
| 代理商： | MC34167 |
MC34167, MC33167
http://onsemi.com
11
4
2
1
5
3
+
C
F
R
F
R
1
1.5 k
C
O
2200
V
O
28 V/0.9 A
R
2
EA
Reference
Thermal
Oscillator
S
R
Q
PWM
UVLO
ILIMIT
V
in
12 V
C
in
330
+
6.8 k
4.7 k
0.47
Q
1
D
1
1N5825
+
*Gate resistor R
G
, zener diode D
3
, and diode D
4
are required only when V
in
is greater than 20 V.
L
190 H
*R
G
620
D
3
1N967A
D
2
1N5822
Q
2
MTP3055EL
D
4
1N4148
+
+
Test
Conditions
Results
Line Regulation
V
in
= 10 V to 24 V, I
O
= 0.9 A
V
in
= 12 V, I
O
= 0.1 A to 0.9 A
V
in
= 12 V, I
O
= 0.9 A
V
in
= 12 V, R
L
= 0.1
V
in
= 12 V, I
O
= 0.9 A
V
in
= 24 V, I
O
= 0.9 A
10 mV =
±
0.017%
30 mV =
±
0.053%
140 mV
pp
6.0 A
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
80.1%
87.8%
L = Coilcraft M1496A or General Magnetics Technology GMT0223, 42 turns of #16 AWG on
Magnetics Inc. 58350A2 core.
Heatsink = AAVID Engineering Inc.
MC34167: 5903B, or 5930B
Figure 21 shows that the MC34167 can be configured as a stepup/down converter with the addition of an external power MOSFET. Energy
is stored in the inductor during the ON time of transistors Q
and Q
. During the OFF time, the energy is transferred, with respect to ground,
to the output filter capacitor and load. This circuit configuration has two significant advantages over the basic stepup converter circuit. The first
advantage is that output short circuit protection is provided by the MC34167, since Q
1
is directly in series with V
in
and the load. Second, the
output voltage can be programmed to be less than V
in
. Notice that during the OFF time, the inductor forward biases diodes D
1
and D
2
, transferring
its energy with respect to ground rather than with respect to V
in
. When operating with V
in
greater than 20 V, a gate protection network is required
for the MOSFET. The network consists of components R
G
, D
3
, and D
4
.
Figure 21. StepUp/Down Converter
MTP3055EL: 5925B
RG
(Top View)
Vin
VO
CO
Ci
L
CF
R
R1
D
+
+
+
D3
D2
Q
(Bottom View)
Figure 22. StepUp/Down Converter Printed Circuit Board and Component Layout
3.45
″
″
1
M
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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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