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NCV33161DMR2G

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
MC34161, MC33161, NCV33161
www.onsemi.com
13
T
Figure 26. Automatic AC Line Voltage Selector
+
1.27V
+
1.27V
+
2.8V
+
0.6V
+
-
2.54V
Reference
-
+
-
+
+
-
4
1
7
2
3
5
6
8
10k
+
220
250V
10k
1.2k
100k
1.6M
+
10
10k
3W
MR506
3.0A
Input
92 Vac to
276 Vac
1N
4742
B+
RTN
+
47
+
220
250V
75k
75k
MAC
228A6FP
The above circuit shows the MC34161 configured as an automatic line voltage selector. The IC controls the triac, enabling the circuit to function
as a fullwave voltage doubler or a fullwave bridge. Channel 1 senses the negative half cycles of the AC line voltage. If the line voltage is less
than150 V, the circuit will switch from bridge mode to voltage doubling mode after a preset time delay. The delay is controlled by the 100 kW resistor
and the 10 mF capacitor. If the line voltage is greater than 150 V, the circuit will immediately return to fullwave bridge mode.
MC34161, MC33161, NCV33161
www.onsemi.com
14
Figure 27. Step−Down Converter
+
1.27V
+
1.27V
+
2.8V
+
0.6V
+
-
2.54V
Reference
-
+
-
+
+
-
4
1
7
2
3
5
6
8
0.005
470
0.01
1.8k
+
330
V
in
12V
4.7k
1.6k
0.01
47k
1N5819
MPS750
470mH
+
1000
V
O
5.0V/250mA
Test Conditions Results
Line Regulation V
in
= 9.5 V to 24 V, I
O
= 250 mA 40 mV = ±0.1%
Load Regulation V
in
= 12 V, I
O
= 0.25 mA to 250 mA 2.0 mV = ±0.2%
Output Ripple V
in
= 12 V, I
O
= 250 mA 50 mVpp
Efficiency V
in
= 12 V, I
O
= 250 mA 87.8%
The above figure shows the MC34161 configured as a step−down converter. Channel 1 monitors the output voltage while Channel
2 performs the oscillator function. Upon initial powerup, the converters output voltage will be below nominal, and the output of Channel
1 will allow the oscillator to run. The external switch transistor will eventually pump−up the output capacitor until its voltage exceeds
the input threshold of Channel 1. The output of Channel 1 will then switch low and disable the oscillator. The oscillator will commence
operation when the output voltage falls below the lower threshold of Channel 1.
MC34161, MC33161, NCV33161
www.onsemi.com
15
ORDERING INFORMATION
Device Package Shipping
†
MC34161PG PDIP−8
(Pb−Free)
50 Units / Rail
MC34161DG
SOIC−8
(Pb−Free)
98 Units / Rail
MC34161DR2G 2500 / Tape & Reel
MC34161DMR2G Micro8
(Pb−Free)
4000 / Tape & Reel
MC33161PG PDIP−8
(Pb−Free)
50 Units / Rail
MC33161DG
SOIC−8
(Pb−Free)
98 Units / Rail
MC33161DR2G 2500 / Tape & Reel
NCV33161DR2G* 2500 / Tape & Reel
MC33161DMR2G
Micro8
(Pb−Free)
4000 / Tape & Reel
NCV33161DMR2G* 4000 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*NCV: T
low
= −40°C, T
high
= +125°C. Guaranteed by design. NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control
Change Requirements; AEC−Q100 Qualified and PPAP Capable.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

NCV33161DMR2G

Mfr. #:
Buy NCV33161DMR2G
Manufacturer:
ON Semiconductor
Description:
Supervisory Circuits AEC ANA UNI VOLT MONITOR
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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