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MC34166THG bảng dữ liệu(PDF) 11 Page - ON Semiconductor

tên linh kiện MC34166THG
Giải thích chi tiết về linh kiện  3.0 A, Step?뭊p/Down/ Inverting Switching Regulators
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nhà sản xuất  ONSEMI [ON Semiconductor]
Trang chủ  http://www.onsemi.com
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MC34166, MC33166
http://onsemi.com
11
4
2
1
5
3
+
CF
RF
R2
3.3 k
R1
EA
Reference
Thermal
Oscillator
S
R
Q
PWM
UVLO
ILIMIT
Vin
12 V
Cin
330
2.4 k
4.7 k
0.47
Q1
+
CO
2200
VO
−12 V/1.0 A
D1
1N5822
L
190
mH
C1
0.047
+
+
Test
Conditions
Results
Line Regulation
Vin = 8.0 V to 24 V, IO = 1.0 A
3.0 mV =
± 0.01%
Load Regulation
Vin = 12 V, IO = 0.1 A to 1.0 A
4.0 mV =
± 0.017%
Output Ripple
Vin = 12 V, IO = 1.0 A
80 mVpp
Short Circuit Current
Vin = 12 V, RL = 0.1 W
3.74 A
Efficiency
Vin = 12 V, IO = 1.0 A
81.2%
L = Coilcraft M1496−A or General Magnetics Technology GMT−0223, 42 turns of #16 AWG
on Magnetics Inc. 58350−A2 core. Heatsink = AAVID Engineering Inc. 5903B, or 5930B.
Two potential problems arise when designing the standard voltage−inverting converter with the MC34166. 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 Q1 positive with respect to the ground pin and has the effect of reversing the Error Amplifier inputs. Note that the voltage
drop across R1 is equal to 5.05 V when the output is in regulation.
Figure 23. Voltage−Inverting Converter
+
+
+
+
+
+
+
+
+
+
+
+
Figure 24. Voltage−Inverting Converter Printed Circuit Board and Component Layout
(Bottom View)
(Top View)
3.0
Vin
VO
CF
RF
+−
+
+
+


Số phần tương tự - MC34166THG

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
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ON Semiconductor
MC34166THG ONSEMI-MC34166THG Datasheet
265Kb / 18P
   3.0 A, Step?뭊p/Down/Inverting Switching Regulators
October, 2005 ??Rev. 7
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Mô tả tương tự - MC34166THG

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
ON Semiconductor
MC34166 ONSEMI-MC34166_05 Datasheet
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   3.0 A, Step?뭊p/Down/Inverting Switching Regulators
October, 2005 ??Rev. 7
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February, 2007 ??Rev. 19
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MC34167 ONSEMI-MC34167_10 Datasheet
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MC34063LINVEVB ONSEMI-MC34063LINVEVB Datasheet
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MC34163 ONSEMI-MC34163_08 Datasheet
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