MC34166 ON Semiconductor, MC34166 Datasheet - Page 13

• Manufacturer Part Number: MC34166
• Description: (MC33166 / MC34166) Step-Up/Down/Inverting Switching Regulators
• Manufacturer: ON Semiconductor

+
+
−12 V
V
PWM
L = Coilcraft M1496−A or ELMACO CHK1050, 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
Test
1000
3
Thermal
Figure 26. Negative Input/Positive Output Regulator
*Gate resistor R
Test
Thermal
V
V
V
V
in
in
in
in
G
, zener diode D
= −10 V to − 20 V, I
= −12 V, I
= −12 V, I
MC34166, MC33166
= −12 V, I
S
R
5
http://onsemi.com
Q
+
S
R
V
V
Conditions
5
Q
O
O
O
in
in
+
ILIMIT
= 0.025 A to 0.25 A
= 0.25 A
= 0.25 A
Conditions
= 12 V to 24 V
= 12 V to 24 V
Reference
0.22
UVLO
3
13
, and diode D
0.002
ILIMIT
EA
Reference
UVLO
0.1
O
= 0.25 A
EA
470 k
4
Q
+
are required only when V
1
56 k
4
2
1
1760 RPM ±1%
3260 RPM ± 6%
+
1N5822
4
2
1
250 mV = ± 0.35%
790 mV = ±1.19%
80 mV
D
79.2%
22
0.01
1
Results
+
Z
1
18 V
1N5822
Brush
Motor
V
1000
pp
Results
5.6 k
in
R
1
in
+
V O +
is greater than 20 V.
3055E
MUR415
MTP
47
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/0.25 A
1000
V
O