MC33167 데이터 시트보기 (PDF) - ON Semiconductor
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MC33167 Datasheet PDF : 20 Pages
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MC34167, MC33167
+
Oscillator
PWM
Thermal
ILIMIT
S
Q
R
UVLO
+
Reference
EA
4
Q1
2
+
1
22
0.01
1N5825
ǒ Ǔ VO + 5ĂĂ.Ă0ĂĂ5ĂRR12 ) 0.7
R1
D1
Z1
L
MUR415
MTP
3055E
VO
+Ă36 V/0.3 A
+
R1
1000
36 k
2N3906
6.8 k
3
Vin
-12 V
+
5
0.22
470 k
R2
0.002
5.1 k
1000
*Gate resistor RG, zener diode D3, and diode D4 are required only when Vin is greater than 20 V.
Test
Conditions
Results
Line Regulation
Vin = –10 V to – 20 V, IO = 0.3 A 266 mV = ± 0.38%
Load Regulation
Vin = –12 V, IO = 0.03 A to 0.3 A 7.90 mV = ±1.1%
Output Ripple
Vin = –12 V, IO = 0.3 A
100 mVpp
Efficiency
Vin = –12 V, IO = 0.3 A
78.4%
L = General Magnetics Technology GMT–0223, 42 turns of #16 AWG on Magnetics Inc.
58350–A2 core. Heatsink = AAVID Engineering Inc. 5903B or 5930B
Figure 26. Negative Input/Positive Output Regulator
+
Oscillator
PWM
Thermal
3
ILIMIT
S
Q
R
UVLO
Vin
4 18 V
+
1000
2
1N5825
+
Reference
EA
+
1
Brush
Motor
5.6 k 1.0 k
+
47
50 k
Faster
5
0.1
56 k
Test
Conditions
Results
Low Speed Line Regulation
Vin = 12 V to 24 V
1760 RPM ±1%
High Speed Line Regulation
Vin = 12 V to 24 V
3260 RPM ± 6%
Figure 27. Variable Motor Speed Control with EMF Feedback Sensing
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14
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