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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)： | 12/20頁 |
| 文件大?。?/td> | 263K |
| 代理商： | MC34167 |
MC34167, MC33167
http://onsemi.com
12
4
2
1
5
3
+
C
F
R
F
R
2
3.3 k
R
1
EA
Reference
Thermal
Oscillator
S
R
Q
PWM
UVLO
ILIMIT
V
in
12 V
C
in
330
+
2.4 k
4.7 k
0.47
Q
1
+
C
O
4700
V
O
12 V/1.7 A
D
1
1N5825
L
190 H
C
1
0.047
+
+
Test
Conditions
Results
Line Regulation
V
in
= 10 V to 24 V, I
O
= 1.7 A
V
in
= 12 V, I
O
= 0.1 A to 1.7 A
V
in
= 12 V, I
O
= 1.7 A
V
in
= 12 V, R
L
= 0.1
V
in
= 12 V, I
O
= 1.7 A
V
in
= 24 V, I
O
= 1.7 A
15 mV =
±
0.61%
4.0 mV =
±
0.020%
78 mV
pp
5.7 A
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
79.5%
86.2%
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.
Two potential problems arise when designing the standard voltageinverting converter with the MC34167. First, the Switch Output emitter is
limited to 1.5 V with respect to the ground pin and second, the Error Amplifier’s noninverting input is internally committed to the reference and
is not pinned out. Both of these problems are resolved by connecting the IC ground pin to the converter’s negative output as shown in Figure 23.
This keeps the emitter of Q
1
positive with respect to the ground pin and has the effect of reversing the Error Amplifier inputs. Note that the voltage
drop across R
1
is equal to 5.05 V when the output is in regulation.
Figure 23. VoltageInverting Converter
3.0
″
+
+
+
+
Vin
VO
CO
Ci
L
RF
R
R
D
+
+
+
+
C
Figure 24. VoltageInverting Converter Printed Circuit Board and Component Layout
(Bottom View)
″
1
M
V
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相關代理商/技術參數(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/直流開關調節(jié)器 40V 5A RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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/直流開關調節(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/直流開關調節(jié)器 40V 5A RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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/直流開關調節(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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