MC34167 ON Semiconductor, MC34167 Datasheet - Page 14

• Manufacturer Part Number: MC34167
• Description: (MC33167 / MC34167) Step-Up/Down/Inverting Switching Regulators
• Manufacturer: ON Semiconductor

+
+
−12 V
V
PWM
L = General Magnetics Technology GMT−0223, 42 turns of #16 AWG on Magnetics Inc.
58350−A2 core. Heatsink = AAVID Engineering Inc. 5903B or 5930B
in
Line Regulation
Load Regulation
Output Ripple
Efficiency
Oscillator
Figure 27. Variable Motor Speed Control with EMF Feedback Sensing
PWM
3
+
Low Speed Line Regulation
High Speed Line Regulation
Oscillator
1000
3
Test
Thermal
Figure 26. Negative Input/Positive Output Regulator
*Gate resistor R
Test
Thermal
V
V
V
V
in
in
in
in
G
MC34167, MC33167
S
R
, zener diode D
= −10 V to − 20 V, I
= −12 V, I
= −12 V, I
= −12 V, I
5
http://onsemi.com
Q
+
S
R
5
V
V
Conditions
Q
in
in
+
ILIMIT
O
O
O
Conditions
= 12 V to 24 V
= 12 V to 24 V
Reference
0.22
UVLO
= 0.03 A to 0.3 A
= 0.3 A
14
= 0.3 A
3
, and diode D
ILIMIT
0.002
EA
Reference
0.1
UVLO
O
EA
470 k
= 0.3 A
Q
+
4
1
are required only when V
56 k
4
2
1
+
1760 RPM ±1%
3260 RPM ± 6%
266 mV = ± 0.38%
7.90 mV = ±1.1%
100 mV
78.4%
4
2
1
1N5825
6.8 k
D
22
0.01
1
Results
+
Z
1
Results
18 V
1N5825
1000
V
pp
Brush
Motor
5.6 k
in
R
1
+
V O +
in
is greater than 20 V.
3055E
MUR415
47
MTP
1.0 k
L
2N3906
5.05
R 1
R 2
50 k
5.1 k
36 k
)
R
R
Faster
1
2
+
0.7
+ 36 V/0.3 A
1000
V
O