ONSEMI MC33161D

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.
Applications include direct monitoring of positive and negative
voltages used in appliance, automotive, consumer, and industrial
equipment.
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MARKING
DIAGRAMS
8
1
1
8
SOIC−8
D SUFFIX
CASE 751
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
Pinned Out 2.54 V Reference with Current Limit Protection
Low Standby Current
Open Collector Outputs for Enhanced Device Flexibility
NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
Pb−Free Packages are Available
VCC
8
1
VS
2.54V
Reference
−
+
+
6
−
1.27V
+
1
8
Micro8t
DM SUFFIX
CASE 846A
x161
AYW G
G
1
1
x
= 3 or 4
A
= Assembly Location
WL, L = Wafer Lot
YY, Y
= Year
WW, W = Work Week
G or G = Pb−Free Package
(Note: Microdot may be in either location)
Vref
1
8
VCC
Input 1
2
7
Mode Select
Input 2
3
6
Output 1
GND
4
5
Output 2
−
+
3
+
+
2.8V
+
1
3x161
ALYW
G
PIN CONNECTIONS
7
2
MC3x161P
AWL
YYWWG
PDIP−8
P SUFFIX
CASE 626
(TOP VIEW)
5
+
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
June, 2006 − Rev. 9
1
Publication Order Number:
MC34161/D
MC34161, MC33161, NCV33161
MAXIMUM RATINGS (Note 1)
Symbol
Value
Unit
Power Supply Input Voltage
VCC
40
V
Comparator Input Voltage Range
Vin
− 1.0 to +40
V
Comparator Output Sink Current (Pins 5 and 6) (Note 2)
ISink
20
mA
Comparator Output Voltage
Vout
40
V
PD
RqJA
800
100
mW
°C/W
PD
RqJA
450
178
mW
°C/W
RqJA
240
°C/W
Operating Junction Temperature
TJ
+150
°C
Operating Ambient Temperature (Note 3)
MC34161
MC33161
NCV33161
TA
Storage Temperature Range
Tstg
Rating
Power Dissipation and Thermal Characteristics (Note 2)
P Suffix, Plastic Package, Case 626
Maximum Power Dissipation @ TA = 70°C
Thermal Resistance, Junction−to−Air
D Suffix, Plastic Package, Case 751
Maximum Power Dissipation @ TA = 70°C
Thermal Resistance, Junction−to−Air
DM Suffix, Plastic Package, Case 846A
Thermal Resistance, Junction−to−Ambient
°C
0 to +70
− 40 to +105
−40 to +125
− 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.
Thigh = +70°C for MC34161
3. Tlow = 0°C for MC34161
−40°C for MC33161
+105°C for MC33161
−40°C for NCV33161
+125°C for NCV33161
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MC34161, MC33161, NCV33161
ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, for typical values TA = 25°C, for min/max values TA is the operating ambient
temperature range that applies [Notes 4 and 5], unless otherwise noted.)
Characteristics
Symbol
Min
Typ
Max
Unit
Vth
1.245
1.235
1.27
−
1.295
1.295
V
COMPARATOR INPUTS
Threshold Voltage, Vin Increasing (TA = 25°C)
(TA = Tmin to Tmax)
DVth
−
7.0
15
mV
Threshold Hysteresis, Vin Decreasing
VH
15
25
35
mV
Threshold Difference |Vth1 − Vth2|
VD
−
1.0
15
mV
VRTD
1.20
1.27
1.32
V
IIB
−
−
40
85
200
400
nA
Vth(CH 1)
Vth(CH 2)
Vref+0.15
0.3
Vref+0.23
0.63
Vref+0.30
0.9
V
Output Sink Saturation Voltage (ISink = 2.0 mA)
(ISink = 10 mA)
(ISink = 0.25 mA, VCC = 1.0 V)
VOL
−
−
−
0.05
0.22
0.02
0.3
0.6
0.2
V
Off−State Leakage Current (VOH = 40 V)
IOH
−
0
1.0
mA
Output Voltage (IO = 0 mA, TA = 25°C)
Vref
2.48
2.54
2.60
V
Load Regulation (IO = 0 mA to 2.0 mA)
Regload
−
0.6
15
mV
Line Regulation (VCC = 4.0 V to 40 V)
Regline
−
5.0
15
mV
DVref
2.45
−
2.60
V
ISC
−
8.5
30
mA
ICC
−
−
450
560
700
900
mA
VCC
2.0
4.0
−
−
40
40
V
Threshold Voltage Variation (VCC = 2.0 V to 40 V)
Reference to Threshold Difference (Vref − Vin1), (Vref − Vin2)
Input Bias Current (Vin = 1.0 V)
(Vin = 1.5 V)
MODE SELECT INPUT
Mode Select Threshold Voltage (Figure 6)
Channel 1
Channel 2
COMPARATOR OUTPUTS
REFERENCE OUTPUT
Total Output Variation over Line, Load, and Temperature
Short Circuit Current
TOTAL DEVICE
Power Supply Current (VMode, Vin1, Vin2 = GND)
(VCC = 5.0 V)
(VCC = 40 V)
Operating Voltage Range (Positive Sensing)
(Negative Sensing)
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
Thigh = +70°C for MC34161
5. Tlow = 0°C for MC34161
−40°C for MC33161
+105°C for MC33161
−40°C for NCV33161
+125°C for NCV33161
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MC34161, MC33161, NCV33161
500
VCC = 5.0 V
RL = 10 k to VCC
5.0 TA = 25°C
IIB , INPUT BIAS CURRENT (nA)
Vout , OUTPUT VOLTAGE (V)
6.0
4.0
3.0
2.0
TA = 85°C
TA = 25°C
1.0
TA = −40°C
0
1.22
1.23
TA = 85°C
TA = 25°C
TA = −40°C
1.24
1.25
1.26
1.27
Vin, INPUT VOLTAGE (V)
1.28
VCC = 5.0 V
VMode = GND
TA = 25°C
400
300
200
100
0
1.29
0
t PHL, OUTPUT PROPAGATION DELAY TIME (ns)
Figure 2. Comparator Input Threshold Voltage
5.0
8.0
VCC = 5.0 V
TA = 25°C
1. VMode = GND, Output Falling
2. VMode = VCC, Output Rising
3. VMode = VCC, Output Falling
4. VMode = GND, Output Rising
Vout , OUTPUT VOLTAGE (V)
3000
2400
1800
1
2
1200
3
Undervoltage Detector
Programmed to trip at 4.5 V
R1 = 1.8 k, R2 = 4.7 k
RL = 10 k to VCC
Refer to Figure 17
6.0
4.0
2.0
TA = −40°C
TA = −25°C
TA = −85°C
4
0
2.0
4.0
6.0
8.0
0
10
4.0
6.0
8.0
Figure 4. Output Propagation Delay Time
versus Percent Overdrive
Figure 5. Output Voltage versus Supply Voltage
Channel 2 Threshold
Channel 1 Threshold
VCC = 5.0 V
RL = 10 k to VCC
4.0
3.0
2.0
TA = 85°C
TA = 25°C
TA = −40°C
1.0
0
0
2.0
VCC, SUPPLY VOLTAGE (V)
6.0
5.0
0
PERCENT OVERDRIVE (%)
I Mode , MODE SELECT INPUT CURRENT (μ A)
600
4.0
2.0
3.0
Vin, INPUT VOLTAGE (V)
Figure 3. Comparator Input Bias Current
versus Input Voltage
3600
Vout , CHANNEL OUTPUT VOLTAGE (V)
1.0
0.5
1.0
1.5
TA = −40°C
2.0
2.5
TA = 85°C
TA = 25°C
3.0
3.5
40
VCC = 5.0 V
TA = 25°C
35
30
25
20
15
10
5.0
0
0
VMode, MODE SELECT INPUT VOLTAGE (V)
Figure 6. Mode Select Thresholds
1.0
2.0
3.0
4.0
VMode, MODE SELECT INPUT VOLTAGE (V)
Figure 7. Mode Select Input Current
versus Input Voltage
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5.0
MC34161, MC33161, NCV33161
Vref , REFERENCE OUTPUT VOLTAGE (V)
Vref, REFERENCE VOLTAGE (V)
2.8
2.4
2.0
1.6
1.2
0.8
VMode = GND
TA = 25°C
0.4
0
0
10
20
30
VCC, SUPPLY VOLTAGE (V)
2.610
Vref Max = 2.60 V
2.578
2.546
Vref Typ = 2.54 V
2.514
VCC = 5.0 V
VMode = GND
2.482
Vref Min = 2.48 V
2.450
40
−55
0
TA = −40°C
−6.0
−8.0
TA = 25°C
VCC = 5.0 V
VMode = GND
TA = 85°C
−2.0
−4.0
−10
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
Iref, REFERENCE SOURCE CURRENT (mA)
8.0
0.5
125
0.4
TA = 85°C
0.3
TA = 25°C
0.2
TA = −40°C
0.1
0
0
8.0
12
4.0
Iout, OUTPUT SINK CURRENT (mA)
16
Figure 11. Output Saturation Voltage
versus Output Sink Current
1.6
0.8
VMode = GND
Pins 2, 3 = 1.5 V
0.6
VMode = VCC
Pins 2, 3 =
GND
I CC , INPUT SUPPLY CURRENT (mA)
I CC , SUPPLY CURRENT (mA)
100
VCC = 5.0 V
VMode = GND
Figure 10. Reference Voltage Change
versus Source Current
VMode = Vref
Pin 1 = 1.5 V
Pin 2 = GND
0.4
0.2
ICC measured at Pin 8
TA = 25°C
0
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
Figure 9. Reference Voltage
versus Ambient Temperature
Vout , OUTPUT SATURATION VOLTAGE (V)
Vref , REFERENCE VOLTAGE CHANGE (mV)
Figure 8. Reference Voltage
versus Supply Voltage
−25
0
10
20
30
VCC, SUPPLY VOLTAGE (V)
1.2
0.8
0
40
VCC = 5.0 V
VMode = GND
TA = 25°C
0.4
0
Figure 12. Supply Current versus
Supply Voltage
8.0
12
4.0
Iout, OUTPUT SINK CURRENT (mA)
Figure 13. Supply Current
versus Output Sink Current
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5
16
MC34161, MC33161, NCV33161
VCC
8
2.54V
Reference
Vref
1
Mode Select
−
7
+
Input 1
+
Output 1
2.8V
+
2
Channel 1
+
6
−
1.27V
−
+
+
3
+
Output 2
0.6V
+
Input 2
Channel 2
5
−
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
GND
0
1
0
1
0
1
0
1
Channels 1 & 2: Noninverting
Vref
0
1
0
1
0
1
1
0
Channel 1: Noninverting
Channel 2: Inverting
VCC (>2.0 V)
0
1
1
0
0
1
1
0
Channels 1 & 2: Inverting
Figure 15. Truth Table
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6
Comments
MC34161, MC33161, NCV33161
FUNCTIONAL DESCRIPTION
Introduction
Reference
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 Vref + 0.23 V. The mode select input
current is 10 mA when connected to the reference output, and
42 mA when connected to a VCC of 5.0 V, refer to Figure 7.
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
device is capable of sensing positive voltages at a VCC of
1.0 V. These characteristics are important in undervoltage
sensing applications where the output must stay in a low
state as VCC approaches ground. Figure 5 shows the Output
Voltage versus Supply Voltage in an undervoltage sensing
application. Note that as VCC drops below the programmed
4.5 V trip point, the output stays in a well defined active low
state until VCC drops below 1.0 V.
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
functional at a VCC of 2.0 V. In order to provide enhanced
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
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 VS is above trip voltage
V2, for overvoltage detection. The dashed line output
connection has the LED ‘ON’ when VS is below trip voltage
V2, for undervoltage detection.
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.
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MC34161, MC33161, NCV33161
VCC
8
V2
Input VS
VHys
VS1
V1
R2
GND
Output
VCC
Voltage
Pins 5, 6 GND
VS2
R1
1
2.54V
Reference
7
+
2 +
LED ‘ON’
+
−
1.27V
+
R2
3 +
R1
+
−
1.27V
−
+
2.8V
−
+
0.6V
6
5
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
VS1 or VS2 exceeds V2. With the dashed line output connection, the circuit becomes a dual positive undervoltage detector. As the input voltage decreases from
the peak towards ground, the LED will turn ‘ON’ when VS1 or VS2 falls below V1.
For known resistor values, the voltage trip points are:
ǒ
V 1 + (V th * V H)
R2
R1
Ǔ
)1
V 2 + V th
ǒ
For a specific trip voltage, the required resistor ratio is:
R2
R1
Ǔ
R2
)1
R1
+
V1
V th * V H
R2
*1
R1
+
V2
V th
*1
Figure 16. Dual Positive Overvoltage Detector
VCC
8
1
2.54V
Reference
7
+
V2
Input VS
VHys
VS1
V1
R2
GND
2 +
VS2
Output
VCC
Voltage
Pins 5, 6 GND
LED ‘ON’
R1
+
R2
R1
+
−
1.27V
3 +
+
−
1.27V
−
+
2.8V
−
+
0.6V
6
5
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 VS1 or VS2 falls below V1. With the dashed line output connection, the circuit becomes a dual positive overvoltage detector. As the input voltage increases
from ground, the LED will turn ‘ON’ when VS1 or VS2 exceeds V2.
For known resistor values, the voltage trip points are:
ǒ
V 1 + (V th * V H)
R2
R1
Ǔ
)1
V 2 + V th
ǒ
R2
R1
For a specific trip voltage, the required resistor ratio is:
Ǔ
R2
)1
R1
+
V1
V th * V H
*1
Figure 17. Dual Positive Undervoltage Detector
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R2
R1
+
V2
V th
*1
MC34161, MC33161, NCV33161
VCC
8
GND
R2
V1
Input −VS
7
R1
VHys
−VS1
V2
2 +
R2
R1
Output
VCC
Voltage
Pins 5, 6 GND
+
+
−
1.27V
+
−VS2
LED ‘ON’
2.54V
Reference
1
3 +
+
−
1.27V
−
+
2.8V
6
−
+
0.6V
5
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
−VS1 or −VS2 exceeds V2. With the dashed line output connection, the circuit becomes a dual negative undervoltage detector. As the input voltage decreases from
the peak towards ground, the LED will turn ‘ON’ when −VS1 or −VS2 falls below V1.
For known resistor values, the voltage trip points are:
V1 +
R1
R2
(V th * Vref) ) V th
V2 +
R1
R2
For a specific trip voltage, the required resistor ratio is:
R1
(V th * VH * V ref) ) V th * V H
R2
+
V 1 * V th
R1
V th * V ref
R2
+
V 2 * V th ) V H
V th * V H * V ref
Figure 18. Dual Negative Overvoltage Detector
VCC
8
R2
GND
7
R1
V1
−VS1
VHys
Input −VS
V2
2 +
R2
R1
Output
VCC
Voltage
Pins 5, 6 GND
2.54V
Reference
1
+
+
−
1.27V
+
−VS2
3 +
LED ‘ON’
+
−
1.27V
−
+
2.8V
−
+
0.6V
6
5
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 −VS1 or −VS2 falls below V1. With the dashed line output connection, the circuit becomes a dual negative overvoltage detector. As the input voltage increases
from ground, the LED will turn ‘ON’ when −VS1 or −VS2 exceeds V2.
For known resistor values, the voltage trip points are:
V1 +
R1
R2
(V th * Vref) ) V th
V2 +
R1
R2
For a specific trip voltage, the required resistor ratio is:
R1
(V th * VH * V ref) ) V th * V H
R2
+
V 1 * V th
R1
V th * V ref
R2
Figure 19. Dual Negative Undervoltage Detector
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9
+
V 2 * V th ) V H
V th * V H * V ref
MC34161, MC33161, NCV33161
VCC
8
CH2
V4
V3
CH1
V2
V1
Input VS
VHys2
VS
VHys1
7
R3
+
2 +
GND
R2
VCC
Output
Voltage
Pins 5, 6
2.54V
Reference
1
‘ON’
LED ‘OFF’
LED ‘ON’
‘OFF’
+
LED ‘ON’
GND
+
−
1.27V
3 +
R1
+
−
1.27V
−
+
2.8V
6
−
+
0.6V
5
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 VS falls out of the window established by V1 and V4, the LED will turn ‘ON’. As the input voltage
falls within the window, VS increasing from ground and exceeding V2, or VS decreasing from the peak towards ground and falling below V3, the LED will turn ‘OFF’.
With the dashed line output connection, the LED will turn ‘ON’ when the input voltage VS is within the window.
For known resistor values, the voltage trip points are:
ǒ
V 1 + (V th1 * V H1)
V 2 + V th1
ǒ
R3
R1 ) R2
R3
R1 ) R2
Ǔ
)1
Ǔ
)1
For a specific trip voltage, the required resistor ratio is:
ǒ
V 3 + (V th2 * V H2)
V 4 + V th2
ǒ
R2 ) R3
R2 ) R3
R1
R1
Ǔ
R2
)1
R1
Ǔ
R2
)1
R1
+
+
V 3(V th2 * V H2)
V 1(V th1 * V H1)
R3
*1
R1
V 4 x V th2
*1
V 2 x V th1
R3
R1
Figure 20. Positive Voltage Window Detector
+
+
V 3(V 1 * V th1 ) V H1)
V 1(V th2 * V H2)
V 4(V 2 * V th1)
V 2 x V th2
VCC
8
CH2
Input −VS
2.54V
Reference
1
GND
V1
VHys2
V2
CH1 V3
V4
7
R3
+
2 +
VHys1
R2
+
−
1.27V
+
Output
Voltage
Pins 5, 6
VCC
‘ON’
LED ‘OFF’
LED ‘ON’
‘OFF’
LED ‘ON’
GND
3 +
R1
+
−
1.27V
−VS
−
+
2.8V
−
+
0.6V
6
5
4
The above figure shows the MC34161 configured as a negative voltage window detector. When the input voltage −VS falls out of the window established by V1
and V4, the LED will turn ‘ON’. As the input voltage falls within the window, −VS increasing from ground and exceeding V2, or −VS decreasing from the peak towards
ground and falling below V3, the LED will turn ‘OFF’. With the dashed line output connection, the LED will turn ‘ON’ when the input voltage −VS is within the window.
For known resistor values, the voltage trip points are:
V1 +
V2 +
V3 +
V4 +
R 1(V th2 * V ref)
R2 ) R3
For a specific trip voltage, the required resistor ratio is:
R1
) V th2
R 1(V th2 * V H2 * V ref)
R2 ) R3
(R 1 ) R 2)(V th1 * V ref)
R3
R2 ) R3
R2 ) R3
R3
) Vth1
(R 1 ) R 2)(V th1 * V H1 * Vref)
R3
R1
) Vth2 * V H2
R1 ) R2
R3
) V th1 * V H1
R1 ) R2
+
+
+
+
Figure 21. Negative Voltage Window Detector
http://onsemi.com
10
V 1 * V th2
V th2 * V ref
V 2 * V th2 ) VH2
V th2 * V H2 * Vref
V th1 * V ref
V 3 * V th1
V th1 * V H1 * Vref
V 4 ) V H1 * Vth1
MC34161, MC33161, NCV33161
VCC
8
V4
Input VS2
1
GND
7
R4
Input −VS1
Output
Voltage
Pins 5, 6
2.54V
Reference
VHys2
V3
−VS1
V1
V2
VCC
2 +
R3
VHys1
+
+
−
1.27V
+
R2
LED ‘ON’
VS2
GND
3 +
R1
+
−
1.27V
−
+
2.8V
6
−
+
0.6V
5
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 −VS1 exceeds V2, or VS2 exceeds V4. With the dashed line output connection, the circuit becomes a positive and negative undervoltage detector.
As the input voltage decreases from the peak towards ground, the LED will turn ‘ON’ when either VS2 falls below V3, or −VS1 falls below V1.
For known resistor values, the voltage trip points are:
V1 +
V2 +
R3
R4
R3
R4
For a specific trip voltage, the required resistor ratio is:
ǒ
Ǔ
(V th1 * Vref) ) V th1
V 3 + (V th2 * V H2)
(V th1 * VH1 * V ref) ) V th1 * V H1
V 4 + V th2
ǒ
R2
R1
R2
R1
Ǔ
R3
)1
R4
R3
)1
R4
+
+
(V 1 * V th1)
R2
(V th1 * V ref)
R1
(V 2 * V th1 ) V H1)
R2
(V th1 * V H1 * V ref)
R1
+
+
V4
V th2
*1
V3
V th2 * V H2
*1
Figure 22. Positive and Negative Overvoltage Detector
VCC
8
V2
V1
Input VS1
2.54V
Reference
VHys1
1
GND
7
R4
V3
Input −VS2
VS1
VHys2
V4
+
2 +
R3
+
−
1.27V
R2
VCC
Output
Voltage
Pins 5, 6 GND
LED ‘ON’
+
3 +
R1
+
−
1.27V
−VS2
−
+
2.8V
6
−
+
0.6V
5
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 VS1 falls below V1, or −VS2 falls below V3. With the dashed line output connection, the circuit becomes a positive and negative overvoltage
detector. As the input voltage increases from the ground, the LED will turn ‘ON’ when either VS1 exceeds V2, or −VS1 exceeds V1.
For known resistor values, the voltage trip points are:
ǒ
Ǔ
V 1 + (V th1 * V H1)
V 2 + V th1
ǒ
R4
R3
)1
R4
R3
Ǔ
)1
V3 +
V4 +
R1
R2
R1
R2
For a specific trip voltage, the required resistor ratio is:
R4
(V th * Vref) ) V th2
R3
(V th * VH2 * V ref) ) V th2 * V H2
R4
R3
+
+
V2
V th1
V1
V th1 * V H1
Figure 23. Positive and Negative Undervoltage Detector
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11
R1
*1
R2
*1
R1
R2
+
+
V 4 ) V H2 * V th2
V th2 * V H2 * V ref
V 3 * V th2
V th2 * V ref
MC34161, MC33161, NCV33161
VCC
8
VHys
Input VS
1
VS
V1
7
R2
GND
Output
Voltage
Pins 5, 6
VCC
+
+
−
1.27V
2 +
R1
RA
2.54V
Reference
V2
Osc ‘ON’
+
GND
+
−
1.27V
3 +
Piezo
−
+
2.8V
6
−
+
0.6V
5
4
RB
CT
The above figure shows the MC34161 configured as an overvoltage detector with an audio alarm. Channel 1 monitors input voltage VS while channel 2 is connected
as a simple RC oscillator. As the input voltage increases from ground, the output of channel 1 allows the oscillator to turn ‘ON’ when VS exceeds V2.
For known resistor values, the voltage trip points are:
ǒ
V 1 + (V th * V H)
R2
R1
Ǔ
ǒ
For a specific trip voltage, the required resistor ratio is:
Ǔ
R
) 1 V 2 + V th 2 ) 1
R1
R2
R1
+
V1
V th * V H
R2
*1
R1
+
V2
V th
*1
Figure 24. Overvoltage Detector with Audio Alarm
VCC
8
Input VS
V2
V1
2.54V
Reference
1
VHys
7
GND
Output
Voltage
Pin 5
2 +
VS
VCC
GND
R2
3 +
R1
VCC
−
+
0.6V
+
tDLY
Output
Voltage
Pin 6
+
−
1.27V
−
+ +
2.8V
+
−
1.27V
R3
6
RDLY
5
Reset LED ‘ON’
GND
4
CDLY
The above figure shows the MC34161 configured as a microprocessor reset with a time delay. Channel 2 monitors input voltage VS while channel 1 performs the
time delay function. As the input voltage decreases towards ground, the output of channel 2 quickly discharges CDLY when VS falls below V1. As the input voltage
increases from ground, the output of channel 2 allows RDLY to charge CDLY when VS exceeds V2.
For known resistor values, the voltage trip points are:
ǒ
V 1 + (V th * V H)
R2
R1
Ǔ
)1
V 2 + V th
ǒ
R2
R1
For a specific trip voltage, the required resistor ratio is:
Ǔ
R2
)1
For known RDLY CDLY values, the reset time delay is:
R1
tDLY = RDLYCDLY In
+
V1
V th * V H
*1
1
Vth
1−
VCC
Figure 25. Microprocessor Reset with Time Delay
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12
R2
R1
+
V2
V th
*1
MC34161, MC33161, NCV33161
B+
MAC
228A6FP
220
250V
75k
+
220
250V
75k
MR506
T
Input
92 Vac to
276 Vac
+
8
3.0A
2.54V
Reference
1
10k
7
2
+
+
100k
+
−
1.27V
+
1.6M
3
+
1N
4742
+
10
10k
+
+
−
1.27V
47
−
+
2.8V
−
+
0.6V
1.2k
RTN
6
5
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
Vin
12V
MPS750
330
+
8
2.54V
Reference
1
0.01
4.7k
1.6k
7
2
+
+
+
−
1.27V
+
3
+
+
−
1.27V
1N5819
470
1000
VO
5.0V/250mA
1.8k
0.01
−
+
2.8V
+
6
−
+
0.6V
5
47k
4
0.005
Figure 27. Step−Down Converter
Test
Conditions
Results
Line Regulation
Vin = 9.5 V to 24 V, IO = 250 mA
40 mV = ±0.1%
Load Regulation
Vin = 12 V, IO = 0.25 mA to 250 mA
2.0 mV = ±0.2%
Output Ripple
Vin = 12 V, IO = 250 mA
50 mVpp
Efficiency
Vin = 12 V, IO = 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.
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14
MC34161, MC33161, NCV33161
ORDERING INFORMATION
Device
MC34161D
Package
SOIC−8
MC34161DG
SOIC−8
(Pb−Free)
MC34161DR2
SOIC−8
MC34161DR2G
SOIC−8
(Pb−Free)
MC34161DMR2
Micro8
MC34161DMR2G
MC34161P
MC34161PG
MC33161D
Micro8
(Pb−Free)
PDIP−8
(Pb−Free)
MC33161DR2
SOIC−8
MC33161DR2G
SOIC−8
(Pb−Free)
MC33161DMR2
Micro8
MC33161PG
NCV33161DR2*
2500/Tape & Reel
4000/Tape & Reel
50 Units/Rail
SOIC−8
SOIC−8
(Pb−Free)
MC33161P
98 Units/Rail
PDIP−8
MC33161DG
MC33161DMR2G
Shipping†
Micro8
(Pb−Free)
98 Units/Rail
2500/Tape & Reel
4000/Tape & Reel
PDIP−8
PDIP−8
(Pb−Free)
50 Units/Rail
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: Tlow = −40°C, Thigh = +125°C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and control changes.
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15
MC34161, MC33161, NCV33161
PACKAGE DIMENSIONS
PDIP−8
CASE 626−05
ISSUE L
8
NOTES:
1. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
2. PACKAGE CONTOUR OPTIONAL (ROUND OR
SQUARE CORNERS).
3. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
5
−B−
1
4
F
−A−
NOTE 2
L
C
J
−T−
N
SEATING
PLANE
D
H
M
K
G
0.13 (0.005)
M
T A
M
B
M
http://onsemi.com
16
DIM
A
B
C
D
F
G
H
J
K
L
M
N
MILLIMETERS
MIN
MAX
9.40
10.16
6.10
6.60
3.94
4.45
0.38
0.51
1.02
1.78
2.54 BSC
0.76
1.27
0.20
0.30
2.92
3.43
7.62 BSC
−−−
10_
0.76
1.01
INCHES
MIN
MAX
0.370
0.400
0.240
0.260
0.155
0.175
0.015
0.020
0.040
0.070
0.100 BSC
0.030
0.050
0.008
0.012
0.115
0.135
0.300 BSC
−−−
10_
0.030
0.040
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.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
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.
−X−
A
8
5
S
B
1
0.25 (0.010)
M
Y
M
4
K
−Y−
G
C
N
DIM
A
B
C
D
G
H
J
K
M
N
S
X 45 _
SEATING
PLANE
−Z−
0.10 (0.004)
H
D
0.25 (0.010)
M
Z Y
S
X
M
J
S
SOLDERING FOOTPRINT*
1.52
0.060
7.0
0.275
4.0
0.155
0.6
0.024
1.270
0.050
SCALE 6:1
mm Ǔ
ǒinches
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
http://onsemi.com
17
MILLIMETERS
MIN
MAX
4.80
5.00
3.80
4.00
1.35
1.75
0.33
0.51
1.27 BSC
0.10
0.25
0.19
0.25
0.40
1.27
0_
8_
0.25
0.50
5.80
6.20
INCHES
MIN
MAX
0.189
0.197
0.150
0.157
0.053
0.069
0.013
0.020
0.050 BSC
0.004
0.010
0.007
0.010
0.016
0.050
0 _
8 _
0.010
0.020
0.228
0.244
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.
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.
D
HE
PIN 1 ID
E
DIM
A
A1
b
c
D
E
e
L
HE
e
b 8 PL
0.08 (0.003)
T B
M
S
A
S
SEATING
−T− PLANE
0.038 (0.0015)
MILLIMETERS
NOM
MAX
−−
1.10
0.08
0.15
0.33
0.40
0.18
0.23
3.00
3.10
3.00
3.10
0.65 BSC
0.40
0.55
0.70
4.75
4.90
5.05
MIN
−−
0.05
0.25
0.13
2.90
2.90
INCHES
NOM
−−
0.003
0.013
0.007
0.118
0.118
0.026 BSC
0.021
0.016
0.187
0.193
MIN
−−
0.002
0.010
0.005
0.114
0.114
MAX
0.043
0.006
0.016
0.009
0.122
0.122
0.028
0.199
A
A1
L
c
SOLDERING FOOTPRINT*
8X
1.04
0.041
0.38
0.015
3.20
0.126
6X
8X
4.24
0.167
0.65
0.0256
5.28
0.208
SCALE 8:1
mm Ǔ
ǒinches
*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
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
Literature Distribution Center for ON Semiconductor
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Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada
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18
ON Semiconductor Website: www.onsemi.com
Order Literature: http://www.onsemi.com/orderlit
For additional information, please contact your local
Sales Representative
MC34161/D