MC34161DMR2 [ONSEMI]
Universal Voltage Monitors; 通用电压监测器
| 型号： | MC34161DMR2 |
| 厂家： | 
ONSEMI |
| 描述： | Universal Voltage Monitors |
| 文件： | 总18页 (文件大小：217K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MC34161, MC33161,
NCV33161
Universal Voltage Monitors
The MC34161/MC33161 are universal voltage monitors intended
for use in a wide variety of voltage sensing applications. These devices
offer the circuit designer an economical solution for positive and
negative voltage detection. The circuit consists of two comparator
channels each with hysteresis, a unique Mode Select Input for channel
programming, a pinned out 2.54 V reference, and two open collector
outputs capable of sinking in excess of 10 mA. Each comparator
channel can be configured as either inverting or noninverting by the
Mode Select Input. This allows over, under, and window detection of
positive and negative voltages. The minimum supply voltage needed
for these devices to be fully functional is 2.0 V for positive voltage
sensing and 4.0 V for negative voltage sensing.
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MARKING
DIAGRAMS
8
MC3x161P
AWL
YYWWG
PDIP−8
P SUFFIX
CASE 626
Applications include direct monitoring of positive and negative
voltages used in appliance, automotive, consumer, and industrial
equipment.
1
1
8
SOIC−8
D SUFFIX
CASE 751
3x161
ALYW
G
Features
• Unique Mode Select Input Allows Channel Programming
• Over, Under, and Window Voltage Detection
• Positive and Negative Voltage Detection
• Fully Functional at 2.0 V for Positive Voltage Sensing and 4.0 V
for Negative Voltage Sensing
1
1
8
Micro8t
DM SUFFIX
CASE 846A
x161
AYW G
G
• Pinned Out 2.54 V Reference with Current Limit Protection
• Low Standby Current
1
• Open Collector Outputs for Enhanced Device Flexibility
• NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
1
x
A
= 3 or 4
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
• Pb−Free Packages are Available
V
CC
G or G = Pb−Free Package
8
(Note: Microdot may be in either location)
1
7
2
2.54V
Reference
PIN CONNECTIONS
V
S
V
1
2
3
4
8
7
6
5
V
CC
ref
−
+
Input 1
Input 2
GND
Mode Select
Output 1
6
5
+
2.8V
+
−
+
+
Output 2
1.27V
−
(TOP VIEW)
+
+
3
0.6V
+
−
ORDERING INFORMATION
1.27V
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
4
This device contains
141 transistors.
Figure 1. Simplified Block Diagram
(Positive Voltage Window Detector Application)
© Semiconductor Components Industries, LLC, 2006
1
Publication Order Number:
June, 2006 − Rev. 9
MC34161/D
MC34161, MC33161, NCV33161
MAXIMUM RATINGS (Note 1)
Rating
Symbol
Value
Unit
V
Power Supply Input Voltage
V
CC
40
− 1.0 to +40
20
Comparator Input Voltage Range
V
in
V
Comparator Output Sink Current (Pins 5 and 6) (Note 2)
Comparator Output Voltage
I
mA
V
Sink
V
out
40
Power Dissipation and Thermal Characteristics (Note 2)
P Suffix, Plastic Package, Case 626
Maximum Power Dissipation @ T = 70°C
P
800
100
mW
°C/W
A
D
Thermal Resistance, Junction−to−Air
D Suffix, Plastic Package, Case 751
R
q
JA
Maximum Power Dissipation @ T = 70°C
P
450
178
mW
°C/W
A
D
Thermal Resistance, Junction−to−Air
DM Suffix, Plastic Package, Case 846A
Thermal Resistance, Junction−to−Ambient
R
q
JA
240
°C/W
°C
R
q
JA
Operating Junction Temperature
T
T
+150
J
Operating Ambient Temperature (Note 3)
°C
A
MC34161
MC33161
NCV33161
0 to +70
− 40 to +105
−40 to +125
Storage Temperature Range
T
stg
− 55 to +150
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model 2000 V per MIL−STD−883, Method 3015.
Machine Model Method 200 V.
2. Maximum package power dissipation must be observed.
3. T
=
0°C for MC34161
−40°C for MC33161
−40°C for NCV33161
T
high
=
+70°C for MC34161
+105°C for MC33161
+125°C for NCV33161
low
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MC34161, MC33161, NCV33161
ELECTRICAL CHARACTERISTICS (V = 5.0 V, for typical values T = 25°C, for min/max values T is the operating ambient
CC
A
A
temperature range that applies [Notes 4 and 5], unless otherwise noted.)
Characteristics
Symbol
Min
Typ
Max
Unit
COMPARATOR INPUTS
Threshold Voltage, V Increasing (T = 25°C)
V
th
1.245
1.235
1.27
−
1.295
1.295
V
in
A
(T = T
to T
)
A
min
max
Threshold Voltage Variation (V = 2.0 V to 40 V)
DV
−
15
7.0
25
15
35
mV
mV
mV
V
CC
th
Threshold Hysteresis, V Decreasing
V
H
in
Threshold Difference |V − V
|
V
D
−
1.0
1.27
15
th1
th2
Reference to Threshold Difference (V − V ), (V − V
)
V
RTD
1.20
1.32
ref
in1
ref
in2
Input Bias Current (V = 1.0 V)
I
IB
−
−
40
85
200
400
nA
in
(V = 1.5 V)
in
MODE SELECT INPUT
Mode Select Threshold Voltage (Figure 6)
Channel 1
Channel 2
V
V
V
ref
+0.15
0.3
V
+0.23
0.63
V +0.30
ref
V
th(CH 1)
th(CH 2)
ref
0.9
COMPARATOR OUTPUTS
Output Sink Saturation Voltage (I
= 2.0 mA)
= 10 mA)
= 0.25 mA, V = 1.0 V)
V
OL
−
−
−
0.05
0.22
0.02
0.3
0.6
0.2
V
Sink
Sink
Sink
(I
(I
CC
Off−State Leakage Current (V = 40 V)
I
−
0
1.0
mA
OH
OH
REFERENCE OUTPUT
Output Voltage (I = 0 mA, T = 25°C)
V
ref
2.48
−
2.54
0.6
5.0
−
2.60
15
V
O
A
Load Regulation (I = 0 mA to 2.0 mA)
Reg
mV
mV
V
O
load
Line Regulation (V = 4.0 V to 40 V)
Reg
−
15
CC
line
ref
Total Output Variation over Line, Load, and Temperature
Short Circuit Current
DV
2.45
−
2.60
30
I
8.5
mA
SC
TOTAL DEVICE
Power Supply Current (V , V , V = GND)
Mode in1 in2
(V = 5.0 V)
(V = 40 V)
CC
I
CC
−
−
450
560
700
900
mA
CC
Operating Voltage Range (Positive Sensing)
(Negative Sensing)
V
CC
2.0
4.0
−
−
40
40
V
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
5. T
=
0°C for MC34161
−40°C for MC33161
−40°C for NCV33161
T
high
=
+70°C for MC34161
+105°C for MC33161
+125°C for NCV33161
low
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MC34161, MC33161, NCV33161
6.0
5.0
4.0
3.0
2.0
1.0
500
V
= 5.0 V
R = 10 k to V
CC
L
CC
V
V
= 5.0 V
= GND
CC
T
°
A = 25 C
400
300
200
100
0
Mode
T = 25°C
A
T = 85°C
A
T = 85°C
A
T = −40°C
A
A
T = 25°C
A
T = 25°C
T = −40°C
A
0
1.22
1.23
1.24
1.25
1.26
1.27
1.28
1.29
0
1.0
2.0
3.0
4.0
5.0
V , INPUT VOLTAGE (V)
in
V , INPUT VOLTAGE (V)
in
Figure 2. Comparator Input Threshold Voltage
Figure 3. Comparator Input Bias Current
versus Input Voltage
3600
3000
2400
8.0
V
= 5.0 V
Undervoltage Detector
Programmed to trip at 4.5 V
R = 1.8 k, R = 4.7 k
CC
1. V
2. V
3. V
4. V
= GND, Output Falling
= V , Output Rising
Mode
Mode
Mode
Mode
T = 25°C
A
CC
= V , Output Falling
1
2
CC
= GND, Output Rising
6.0
4.0
2.0
0
R = 10 k to V
L
CC
Refer to Figure 17
1800
1200
600
1
2
T = −40°C
A
3
T = −25°C
A
T = −85°C
4
A
0
2.0
4.0
6.0
8.0
10
0
2.0
4.0
V , SUPPLY VOLTAGE (V)
CC
6.0
8.0
PERCENT OVERDRIVE (%)
Figure 4. Output Propagation Delay Time
versus Percent Overdrive
Figure 5. Output Voltage versus Supply Voltage
6.0
5.0
4.0
3.0
2.0
1.0
0
40
35
30
25
20
15
10
V
= 5.0 V
Channel 2 Threshold
Channel 1 Threshold
CC
T = 25°C
A
V
= 5.0 V
R = 10 k to V
CC
L
CC
T = 85°C
A
T = 85°C
T = 25°C
A
A
T = 25°C
A
T = −40°C
A
T = −40°C
A
5.0
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
1.0
2.0
3.0
4.0
5.0
V , MODE SELECT INPUT VOLTAGE (V)
Mode
V , MODE SELECT INPUT VOLTAGE (V)
Mode
Figure 6. Mode Select Thresholds
Figure 7. Mode Select Input Current
versus Input Voltage
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MC34161, MC33161, NCV33161
2.8
2.610
2.578
2.546
2.514
V
ref
Max = 2.60 V
2.4
2.0
1.6
1.2
0.8
V
ref
Typ = 2.54 V
V
V
= 5.0 V
= GND
CC
Mode
2.482
2.450
V
= GND
Mode
0.4
0
T = 25°C
A
V Min = 2.48 V
ref
0
10
20
30
40
−55
−25
0
25
50
75
100
125
V
CC
, SUPPLY VOLTAGE (V)
T , AMBIENT TEMPERATURE (°C)
A
Figure 8. Reference Voltage
versus Supply Voltage
Figure 9. Reference Voltage
versus Ambient Temperature
0
−2.0
−4.0
−6.0
0.5
0.4
0.3
V
= 5.0 V
= GND
CC
V
Mode
T = 85°C
A
T = 25°C
A
V
V
= 5.0 V
= GND
CC
Mode
0.2
0.1
0
T = −40°C
A
−8.0
−10
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
0
4.0
8.0
12
16
I , REFERENCE SOURCE CURRENT (mA)
ref
I , OUTPUT SINK CURRENT (mA)
out
Figure 10. Reference Voltage Change
versus Source Current
Figure 11. Output Saturation Voltage
versus Output Sink Current
1.6
0.8
V
Mode
= V
CC
Pins 2, 3 =
GND
V
= GND
Pins 2, 3 = 1.5 V
Mode
0.6
0.4
1.2
0.8
V
= V
ref
Mode
Pin 1 = 1.5 V
Pin 2 = GND
V
V
= 5.0 V
= GND
CC
0.2
0
Mode
0.4
0
I
measured at Pin 8
CC
T = 25°C
A
T = 25°C
A
0
10
20
, SUPPLY VOLTAGE (V)
30
40
0
4.0
8.0
12
16
V
CC
I , OUTPUT SINK CURRENT (mA)
out
Figure 12. Supply Current versus
Supply Voltage
Figure 13. Supply Current
versus Output Sink Current
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MC34161, MC33161, NCV33161
V
CC
8
2.54V
Reference
V
ref
1
Channel 1
Mode Select
Input 1
−
+
7
2
+
Output 1
2.8V
+
6
−
+
1.27V
Channel 2
−
+
+
Output 2
0.6V
Input 2
+
5
3
−
+
1.27V
4
GND
Figure 14. MC34161 Representative Block Diagram
Mode Select
Pin 7
Input 1
Pin 2
Output 1
Pin 6
Input 2
Pin 3
Output 2
Pin 5
Comments
GND
0
1
0
1
0
1
0
1
Channels 1 & 2: Noninverting
V
ref
0
1
0
1
0
1
1
0
Channel 1: Noninverting
Channel 2: Inverting
V
CC
(>2.0 V)
0
1
1
0
0
1
1
0
Channels 1 & 2: Inverting
Figure 15. Truth Table
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MC34161, MC33161, NCV33161
FUNCTIONAL DESCRIPTION
Reference
Introduction
To be competitive in today’s electronic equipment market,
new circuits must be designed to increase system reliability
with minimal incremental cost. The circuit designer can take
a significant step toward attaining these goals by
implementing economical circuitry that continuously
monitors critical circuit voltages and provides a fault signal
in the event of an out−of−tolerance condition. The
MC34161, MC33161 series are universal voltage monitors
intended for use in a wide variety of voltage sensing
applications. The main objectives of this series was to
configure a device that can be used in as many voltage
sensing applications as possible while minimizing cost. The
flexibility objective is achieved by the utilization of a unique
Mode Select input that is used in conjunction with
traditional circuit building blocks. The cost objective is
achieved by processing the device on a standard Bipolar
Analog flow, and by limiting the package to eight pins. The
device consists of two comparator channels each with
hysteresis, a mode select input for channel programming, a
pinned out reference, and two open collector outputs. Each
comparator channel can be configured as either inverting or
noninverting by the Mode Select input. This allows a single
device to perform over, under, and window detection of
positive and negative voltages. A detailed description of
each section of the device is given below with the
representative block diagram shown in Figure 14.
The 2.54 V reference is pinned out to provide a means for
the input comparators to sense negative voltages, as well as
a means to program the Mode Select input for window
detection applications. The reference is capable of sourcing
in excess of 2.0 mA output current and has built−in short
circuit protection. The output voltage has a guaranteed
tolerance of 2.4% at room temperature.
The 2.54 V reference is derived by gaining up the internal
1.27 V reference by a factor of two. With a power supply
voltage of 4.0 V, the 2.54 V reference is in full regulation,
allowing the device to accurately sense negative voltages.
Mode Select Circuit
The key feature that allows this device to be flexible is the
Mode Select input. This input allows the user to program
each of the channels for various types of voltage sensing
applications. Figure 15 shows that the Mode Select input has
three defined states. These states determine whether
Channel 1 and/or Channel 2 operate in the inverting or
noninverting mode. The Mode Select thresholds are shown
in Figure 6. The input circuitry forms a tristate switch with
thresholds at 0.63 V and V + 0.23 V. The mode select input
ref
current is 10 mA when connected to the reference output, and
42 mA when connected to a V of 5.0 V, refer to Figure 7.
CC
Output Stage
The output stage uses a positive feedback base boost
circuit for enhanced sink saturation, while maintaining a
relatively low device standby current. Figure 11 shows that
the sink saturation voltage is about 0.2 V at 8.0 mA over
temperature. By combining the low output saturation
characteristics with low voltage comparator operation, this
Input Comparators
The input comparators of each channel are identical, each
having an upper threshold voltage of 1.27 V 2.0% with
25 mV of hysteresis. The hysteresis is provided to enhance
output switching by preventing oscillations as the
comparator thresholds are crossed. The comparators have an
input bias current of 60 nA at their threshold which
approximates a 21.2 MW resistor to ground. This high
impedance minimizes loading of the external voltage
divider for well defined trip points. For all positive voltage
sensing applications, both comparator channels are fully
device is capable of sensing positive voltages at a V of
CC
1.0 V. These characteristics are important in undervoltage
sensing applications where the output must stay in a low
state as V approaches ground. Figure 5 shows the Output
CC
Voltage versus Supply Voltage in an undervoltage sensing
application. Note that as V drops below the programmed
CC
4.5 V trip point, the output stays in a well defined active low
functional at a V of 2.0 V. In order to provide enhanced
CC
state until V drops below 1.0 V.
CC
device ruggedness for hostile industrial environments,
additional circuitry was designed into the inputs to prevent
device latchup as well as to suppress electrostatic discharges
(ESD).
APPLICATIONS
The following circuit figures illustrate the flexibility of
this device. Included are voltage sensing applications for
over, under, and window detectors, as well as three unique
configurations. Many of the voltage detection circuits are
shown with the open collector outputs of each channel
connected together driving a light emitting diode (LED).
This ‘ORed’ connection is shown for ease of explanation
and it is only required for window detection applications.
Note that many of the voltage detection circuits are shown
with a dashed line output connection. This connection gives
the inverse function of the solid line connection. For
example, the solid line output connection of Figure 16 has
the LED ‘ON’ when input voltage V is above trip voltage
S
V , for overvoltage detection. The dashed line output
2
connection has the LED ‘ON’ when V is below trip voltage
S
V , for undervoltage detection.
2
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MC34161, MC33161, NCV33161
V
8
CC
V
V
2
2.54V
Reference
Input V
Output
V
S
Hys
1
V
S1
1
−
7
2
+
+
+
R
2
GND
2.8V
+
6
5
V
V
S2
+
+
CC
−
1.27V
R
1
Voltage
Pins 5, 6
−
+
0.6V
LED ‘ON’
GND
R
2
+
3
−
1.27V
R
1
4
The above figure shows the MC34161 configured as a dual positive overvoltage detector. As the input voltage increases from ground, the LED will turn ‘ON’ when
or V exceeds V . With the dashed line output connection, the circuit becomes a dual positive undervoltage detector. As the input voltage decreases from
V
S1
S2
2
the peak towards ground, the LED will turn ‘ON’ when V or V falls below V .
S1
S2
1
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
H
R
1
R
R
R
V
R
R
V
V
2
2
2
1
1
2
1
2
* V )ǒ Ǔ
ǒ Ǔ
V
+ (V
) 1
V
+ V
th
) 1
+
* 1
+
* 1
1
th
2
R
1
V * V
th H
th
Figure 16. Dual Positive Overvoltage Detector
V
CC
8
2.54V
Reference
V
V
2
1
Input V
Output
S
V
V
Hys
S1
−
1
7
2
+
+
+
R
R
2
2.8V
+
6
5
GND
+
+
V
S2
−
1.27V
V
1
CC
−
+
0.6V
Voltage
Pins 5, 6
LED ‘ON’
R
2
GND
+
3
−
1.27V
R
1
4
The above figure shows the MC34161 configured as a dual positive undervoltage detector. As the input voltage decreases towards ground, the LED will turn ‘ON’
when V or V falls below V . With the dashed line output connection, the circuit becomes a dual positive overvoltage detector. As the input voltage increases
S1
S2
1
from ground, the LED will turn ‘ON’ when V or V exceeds V .
S1
S2
2
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
R
V
R
R
V
V
R
H
R
1
R
2
R
1
2
1
1
2
1
2
2
+
* 1
+
* 1
* V )ǒ Ǔ
ǒ Ǔ
V
+ (V
) 1
V
+ V
th
) 1
1
th
2
V
* V
H
th
th
Figure 17. Dual Positive Undervoltage Detector
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MC34161, MC33161, NCV33161
V
8
CC
2.54V
Reference
GND
1
R
2
−
+
7
2
V
+
+
1
R1
2.8V
Input −V
V
Hys
S
+
6
5
−V
S1
+
+
−
1.27V
V
2
−
+
0.6V
R
2
Output
Voltage
Pins 5, 6
V
CC
R1
+
−V
S2
LED ‘ON’
GND
3
−
1.27V
4
The above figure shows the MC34161 configured as a dual negative overvoltage detector. As the input voltage increases from ground, the LED will turn ‘ON’ when
−V or −V exceeds V . With the dashed line output connection, the circuit becomes a dual negative undervoltage detector. As the input voltage decreases from
S1
S2
2
the peak towards ground, the LED will turn ‘ON’ when −V or −V falls below V .
S1
S2
1
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
V
* V
* V
V
* V ) V
R
R
R
R
R
R
R
R
1
th
2
th
H
1
2
1
2
1
2
1
2
V
+
(V * V ) ) V
V
+
(V * V * V ) ) V * V
H
+
+
1
th
th
2
th
H
th
ref
ref
V
V
* V * V
th
ref
th
H
ref
Figure 18. Dual Negative Overvoltage Detector
V
CC
8
2.54V
Reference
1
R
2
GND
−
+
7
2
+
+
R1
V
1
2.8V
+
6
5
−V
V
S1
+
+
−
1.27V
Hys
Input −V
S
V
−
+
0.6V
2
R
2
R1
Output
Voltage
Pins 5, 6
V
CC
−V
+
S2
3
−
1.27V
LED ‘ON’
GND
4
The above figure shows the MC34161 configured as a dual negative undervoltage detector. As the input voltage decreases towards ground, the LED will turn ‘ON’
when −V or −V falls below V . With the dashed line output connection, the circuit becomes a dual negative overvoltage detector. As the input voltage increases
S1
S2
1
from ground, the LED will turn ‘ON’ when −V or −V exceeds V .
S1
S2
2
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
V
* V
* V
V
* V ) V
R
R
R
R
R
R
R
R
1
th
2
th
H
1
2
1
2
1
2
1
2
V
+
(V * V ) ) V
V
+
(V * V * V ) ) V * V
H
+
+
1
th
th
2
th
H
th
ref
ref
V
V
* V * V
th
ref
th
H
ref
Figure 19. Dual Negative Undervoltage Detector
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9
MC34161, MC33161, NCV33161
V
8
CC
2.54V
Reference
V
V
4
CH2
CH1
V
Hys2
V
1
7
2
S
3
Input V
Output
S
−
V
V
2
V
Hys1
+
+
R
3
1
2.8V
+
6
5
−
1.27V
+
+
GND
R
R
−
2
1
V
+
0.6V
CC
+
‘ON’
LED ‘OFF’
LED ‘ON’
‘OFF’
LED ‘ON’
Voltage
Pins 5, 6
+
3
GND
−
1.27V
4
The above figure shows the MC34161 configured as a positive voltage window detector. This is accomplished by connecting channel 1 as an undervoltage detector,
and channel 2 as an overvoltage detector. When the input voltage V falls out of the window established by V and V , the LED will turn ‘ON’. As the input voltage
S
1
4
falls within the window, V increasing from ground and exceeding V , or V decreasing from the peak towards ground and falling below V , the LED will turn ‘OFF’.
S
2
S
3
With the dashed line output connection, the LED will turn ‘ON’ when the input voltage V is within the window.
S
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
3
) R
R
) R
V (V * V
)
)
R
R
V (V * V ) V
)
H1
R
R
2
3
3
th2
H2
H1
3
1
3
1
th1
2
1
V
V
+ (V * V
)
ǒ
) 1
Ǔ
V
V
+ (V * V )
ǒ
) 1
Ǔ
+
+
* 1
+
+
1
2
th1
H1
3
4
th2
H2
R
R
1
V (V * V
V (V * V
)
H2
1
2
1
th1
1
th2
R
R
) R
V
V
x V
x V
R
R
V (V * V
)
th1
R
R
3
2
3
4
2
th2
th1
3
1
4
2
2
1
+ V
ǒ
) 1
Ǔ
+ V
ǒ
) 1
Ǔ
* 1
th1
th2
R
) R
R
1
V
x V
2
th2
1
2
Figure 20. Positive Voltage Window Detector
V
8
CC
2.54V
Reference
1
GND
−
+
V
V
1
CH2
CH1
V
Hys2
7
2
+
+
R
R
R
3
2
2.8V
Input −V
+
−
S
6
5
V
V
+
+
3
V
Hys1
1.27V
−
+
0.6V
4
2
V
Output
Voltage
Pins 5, 6
CC
+
‘ON’
LED ‘OFF’
LED ‘ON’
‘OFF’
LED ‘ON’
3
−
1.27V
1
GND
−V
S
4
The above figure shows the MC34161 configured as a negative voltage window detector. When the input voltage −V falls out of the window established by V
S
1
and V , the LED will turn ‘ON’. As the input voltage falls within the window, −V increasing from ground and exceeding V , or −V decreasing from the peak towards
4
S
2
S
ground and falling below V , the LED will turn ‘OFF’. With the dashed line output connection, the LED will turn ‘ON’ when the input voltage −V is within the window.
3
S
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R (V * V
)
V * V
1
th2
R
1
th2
ref
1
V
V
V
V
+
+
+
+
) V
+
+
+
+
1
2
3
4
th2
R
) R
R
R
R
R
) R
V
* V
th2
ref
2
3
2
2
1
1
3
3
2
2
R (V * V * V
)
V
* V ) V
H2
R
1
) R
1
th2
H2
2
ref
th2
) V * V
th2
H2
R
) R
V
* V * V
2
3
th2
H2
ref
(R ) R )(V * V
)
V
* V
R
3
) R
1
2
th1
th1
ref
ref
) V
th1
R
V
* V
th1
3
3
(R ) R )(V * V * V
)
V
* V * V
th1 H1
R
3
) R
1
2
th1
R
H1
ref
ref
) V * V
th1
H1
V ) V * V
4
H1 th1
3
Figure 21. Negative Voltage Window Detector
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10
MC34161, MC33161, NCV33161
V
8
CC
V
V
4
2.54V
Reference
Input V
V
Hys2
S2
1
7
2
3
−
GND
+
+
+
R
4
2.8V
−V
+
S1
V
V
6
5
1
V
Hys1
R
3
−
1.27V
Input −V
+
+
S1
2
−
+
0.6V
Output
Voltage
Pins 5, 6
V
CC
R2
LED ‘ON’
+
V
S2
3
GND
−
1.27V
R
1
4
The above figure shows the MC34161 configured as a positive and negative overvoltage detector. As the input voltage increases from ground, the LED will turn
‘ON’ when either −V exceeds V , or V exceeds V . With the dashed line output connection, the circuit becomes a positive and negative undervoltage detector.
S1
2
S2
4
As the input voltage decreases from the peak towards ground, the LED will turn ‘ON’ when either V falls below V , or −V falls below V .
S2
3
S1
1
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
R
(V * V
)
th1
R
3
R
R
R
V
4
3
4
1
2
2
1
+
+
V
V
+
+
(V * V ) ) V
ref
th1 th1
)ǒ Ǔ
V
V
+ (V * V
) 1
+
+
* 1
1
2
3
4
th2
H2
(V * V
)
R
R
1
V
th1
ref
4
th2
R
R
(V * V ) V
)
H1
R
R
V
3
* V
R
2
R
R
3
4
2
th1
3
4
2
1
ǒ Ǔ
(V * V * V ) ) V * V
+ V
) 1
* 1
th1
H1
ref
th1
H1
th2
(V * V * V
)
R
1
V
th1
H1
ref
th2
H2
Figure 22. Positive and Negative Overvoltage Detector
V
CC
8
V
2
2.54V
Reference
V
Input V
Hys1
S1
V
1
1
7
−
GND
+
+
+
R
4
V
3
2.8V
+
6
Input −V
V
2
V
Hys2
S2
−
1.27V
S1
+
+
R
3
V
4
−
+
0.6V
R
2
V
Output
Voltage
Pins 5, 6
CC
+
5
LED ‘ON’
3
−
1.27V
R
1
GND
−V
S2
4
The above figure shows the MC34161 configured as a positive and negative undervoltage detector. As the input voltage decreases toward ground, the LED will
turn ‘ON’ when either V falls below V , or −V falls below V . With the dashed line output connection, the circuit becomes a positive and negative overvoltage
S1
1
S2
3
detector. As the input voltage increases from the ground, the LED will turn ‘ON’ when either V exceeds V , or −V exceeds V .
S1
2
S1
1
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
V
) V * V
H2 th2
R
R
R
R
R
R
V
R
R
4
4
3
1
2
4
3
2
1
2
V
V
+ (V * V
)
ǒ
) 1
Ǔ
V
V
+
+
(V * V ) ) V
th2
+
+
* 1
+
+
1
2
th1
H1
3
4
th
ref
V
V
V
* V * V
th2 H2
ref
th1
V
* V
th2
R
4
R
R
R
R
V
1
* V
R
R
3
1
2
4
3
1
2
+ V
ǒ
) 1
Ǔ
(V * V * V ) ) V * V
H2
* 1
th1
th
H2
ref
th2
R
V
* V
th2
ref
3
th1
H1
Figure 23. Positive and Negative Undervoltage Detector
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11
MC34161, MC33161, NCV33161
V
8
CC
R
A
2.54V
Reference
V
V
2
Piezo
1
V
Hys
Input V
Output
V
S
S
1
−
7
+
R
+
+
2
2.8V
+
GND
6
5
2
−
1.27V
+
+
R
1
V
CC
−
+
0.6V
Voltage
Pins 5, 6
Osc ‘ON’
GND
+
3
−
1.27V
4
R
B
C
T
The above figure shows the MC34161 configured as an overvoltage detector with an audio alarm. Channel 1 monitors input voltage V while channel 2 is connected
S
as a simple RC oscillator. As the input voltage increases from ground, the output of channel 1 allows the oscillator to turn ‘ON’ when V exceeds V .
S
2
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
R
R
R
V
R
R
V
V
2
2
2
1
1
2
1
2
* V )ǒ ǓV ǒ Ǔ
V
+ (V
) 1
+ V
th
R
) 1
+
* 1
+
* 1
1
th
H
2
R
V * V
th H
1
1
th
Figure 24. Overvoltage Detector with Audio Alarm
V
8
CC
2.54V
Reference
1
V
V
2
Input V
Output
V
Hys
S
R
3
1
−
7
+
+
+
2.8V
GND
+
6
5
2
V
−
1.27V
+
+
S
V
CC
Voltage
Pin 5
−
+
0.6V
R
DLY
GND
R
2
+
t
DLY
3
−
1.27V
R
Output
Voltage
Pin 6
V
CC
1
Reset LED ‘ON’
GND
4
C
DLY
The above figure shows the MC34161 configured as a microprocessor reset with a time delay. Channel 2 monitors input voltage V while channel 1 performs the
S
time delay function. As the input voltage decreases towards ground, the output of channel 2 quickly discharges C
when V falls below V . As the input voltage
DLY
S 1
increases from ground, the output of channel 2 allows R
to charge C when V exceeds V .
DLY S 2
DLY
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
H
R
1
R
R
R
V
R
R
V
V
2
2
2
1
1
2
1
2
* V )ǒ Ǔ
ǒ Ǔ
V
+ (V
) 1
V
+ V
th
) 1
+
* 1
+
* 1
1
th
2
R
1
V * V
th H
th
1
For known R
C
values, the reset time delay is:
t
= R
C
In
DLY DLY
DLY
DLY DLY
V
th
1 −
V
CC
Figure 25. Microprocessor Reset with Time Delay
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12
MC34161, MC33161, NCV33161
B+
+
+
220
250V
75k
75k
MAC
228A6FP
MR506
T
Input
92 Vac to
276 Vac
8
220
250V
10k
3.0A
2.54V
Reference
RTN
1.2k
1
10k
−
+
7
2
+
+
2.8V
+
6
5
−
+
+
1.27V
100k
−
+
0.6V
1.6M
+
3
−
1.27V
+
10
+
1N
4742
47
4
10k
3W
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.
Figure 26. Automatic AC Line Voltage Selector
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13
MC34161, MC33161, NCV33161
470mH
MPS750
V
in
12V
V
O
5.0V/250mA
+
+
8
330
1000
1N5819
470
2.54V
Reference
1.8k
0.01
1
7
2
−
+
+
+
0.01
4.7k
1.6k
2.8V
+
6
5
−
+
+
1.27V
−
+
0.6V
+
3
−
1.27V
47k
4
0.005
Figure 27. Step−Down Converter
Test
Conditions
Results
40 mV = 0.1%
Line Regulation
Load Regulation
Output Ripple
Efficiency
V
in
V
in
V
in
V
in
= 9.5 V to 24 V, I = 250 mA
O
= 12 V, I = 0.25 mA to 250 mA
2.0 mV = 0.2%
50 mVpp
O
= 12 V, I = 250 mA
O
= 12 V, I = 250 mA
87.8%
O
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.
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14
MC34161, MC33161, NCV33161
ORDERING INFORMATION
Device
†
Package
Shipping
MC34161D
SOIC−8
98 Units/Rail
2500/Tape & Reel
4000/Tape & Reel
50 Units/Rail
MC34161DG
SOIC−8
(Pb−Free)
MC34161DR2
SOIC−8
MC34161DR2G
SOIC−8
(Pb−Free)
MC34161DMR2
Micro8
MC34161DMR2G
Micro8
(Pb−Free)
MC34161P
PDIP−8
MC34161PG
PDIP−8
(Pb−Free)
MC33161D
SOIC−8
98 Units/Rail
MC33161DG
SOIC−8
(Pb−Free)
MC33161DR2
SOIC−8
2500/Tape & Reel
4000/Tape & Reel
MC33161DR2G
SOIC−8
(Pb−Free)
MC33161DMR2
Micro8
MC33161DMR2G
Micro8
(Pb−Free)
MC33161P
PDIP−8
50 Units/Rail
MC33161PG
PDIP−8
(Pb−Free)
NCV33161DR2*
SOIC−8
2500/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 = −40°C, T
= +125°C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and control changes.
low
high
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15
MC34161, MC33161, NCV33161
PACKAGE DIMENSIONS
PDIP−8
CASE 626−05
ISSUE L
NOTES:
1. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
8
5
2. PACKAGE CONTOUR OPTIONAL (ROUND OR
SQUARE CORNERS).
3. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
−B−
1
4
MILLIMETERS
INCHES
MIN
DIM MIN
MAX
10.16
6.60
4.45
0.51
1.78
MAX
0.400
0.260
0.175
0.020
0.070
A
B
C
D
F
9.40
6.10
3.94
0.38
1.02
0.370
0.240
0.155
0.015
0.040
F
−A−
NOTE 2
L
G
H
J
2.54 BSC
0.100 BSC
0.76
0.20
2.92
1.27
0.30
3.43
0.030
0.008
0.115
0.050
0.012
0.135
K
L
C
7.62 BSC
0.300 BSC
M
N
−−−
0.76
10
_
1.01
−−−
0.030
10
0.040
_
J
−T−
SEATING
PLANE
N
M
D
K
G
H
M
M
M
B
0.13 (0.005)
T
A
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16
MC34161, MC33161, NCV33161
PACKAGE DIMENSIONS
SOIC−8 NB
CASE 751−07
ISSUE AH
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE
MOLD PROTRUSION.
−X−
A
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
8
5
4
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
6. 751−01 THRU 751−06 ARE OBSOLETE. NEW
STANDARD IS 751−07.
S
M
M
B
0.25 (0.010)
Y
1
K
−Y−
G
MILLIMETERS
DIM MIN MAX
INCHES
MIN
MAX
0.197
0.157
0.069
0.020
A
B
C
D
G
H
J
K
M
N
S
4.80
3.80
1.35
0.33
5.00 0.189
4.00 0.150
1.75 0.053
0.51 0.013
C
N X 45
_
SEATING
PLANE
−Z−
1.27 BSC
0.050 BSC
0.10 (0.004)
0.10
0.19
0.40
0
0.25 0.004
0.25 0.007
1.27 0.016
0.010
0.010
0.050
8
0.020
0.244
M
J
H
D
8
0
_
_
_
_
0.25
5.80
0.50 0.010
6.20 0.228
M
S
S
X
0.25 (0.010)
Z
Y
SOLDERING FOOTPRINT*
1.52
0.060
7.0
4.0
0.275
0.155
0.6
0.024
1.270
0.050
mm
inches
ǒ
Ǔ
SCALE 6:1
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
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17
MC34161, MC33161, NCV33161
PACKAGE DIMENSIONS
Micro8t
CASE 846A−02
ISSUE G
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
D
3. DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE
BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED
0.15 (0.006) PER SIDE.
4. DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION.
INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.25 (0.010) PER SIDE.
5. 846A−01 OBSOLETE, NEW STANDARD 846A−02.
H
E
E
MILLIMETERS
INCHES
NOM
−−
0.003
0.013
0.007
0.118
DIM
A
A1
b
c
D
MIN
−−
NOM
−−
MAX
MIN
−−
MAX
0.043
0.006
0.016
0.009
0.122
0.122
PIN 1 ID
1.10
0.15
0.40
0.23
3.10
3.10
e
0.05
0.25
0.13
2.90
2.90
0.08
0.002
0.010
0.005
0.114
0.114
b 8 PL
0.33
M
S
S
0.08 (0.003)
T
B
A
0.18
3.00
E
3.00
0.118
e
L
H
E
0.65 BSC
0.55
4.90
0.026 BSC
0.021
0.193
0.40
4.75
0.70
5.05
0.016
0.187
0.028
0.199
SEATING
PLANE
−T−
A
0.038 (0.0015)
L
A1
c
SOLDERING FOOTPRINT*
1.04
0.38
8X
8X 0.041
0.015
3.20
4.24
5.28
0.126
0.167 0.208
0.65
6X0.0256
SCALE 8:1
mm
inches
ǒ
Ǔ
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
Micro8 is a trademark of International Rectifier.
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
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