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| MC34161, MC33161 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. * 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 http://onsemi.com MARKING DIAGRAMS 8 PDIP-8 P SUFFIX CASE 626 1 1 8 8 1 SO-8 D SUFFIX CASE 751 1 x = 3 or 4 A = Assembly Location WL, L = Wafer Lot YY, Y = Year WW, W = Work Week 3x161 ALYW MC3x161P AWL YYWW 8 PIN CONNECTIONS Simplified Block Diagram (Positive Voltage Window Detector Application) VCC Input 2 8 1 2.54V Reference - 2 + + - 1.27V 3 + + - 1.27V + - + 0.6V 5 + + 2.8V 6 Gnd 3 4 (TOP VIEW) 6 5 Output 1 Output 2 Vref Input 1 1 2 8 7 VCC Mode Select VS 7 ORDERING INFORMATION Device MC34161D MC34161DR2 MC34161P MC33161D MC33161DR2 MC33161P Package SO-8 SO-8 PDIP-8 SO-8 SO-8 PDIP-8 Shipping 98 Units/Rail 2500 Tape & Reel 50 Units/Rail 98 Units/Rail 2500 Tape & Reel 50 Units/Rail 4 (c) Semiconductor Components Industries, LLC, 2000 1 April, 2000 - Rev. 2 Publication Order Number: MC34161/D MC34161, MC33161 MAXIMUM RATINGS Rating Power Supply Input Voltage Comparator Input Voltage Range Comparator Output Sink Current (Pins 5 and 6) (Note 1.) Comparator Output Voltage Power Dissipation and Thermal Characteristics (Note 1.) P Suffix, Plastic Package, Case 626 Maximum Power Dissipation @ TA = 70C Thermal Resistance, Junction-to-Air D Suffix, Plastic Package, Case 751 Maximum Power Dissipation @ TA = 70C Thermal Resistance, Junction-to-Air Operating Junction Temperature Operating Ambient Temperature (Note 3.) MC34161 MC33161 Storage Temperature Range Symbol VCC Vin ISink Vout Value 40 - 1.0 to +40 20 40 Unit V V mA V PD RJA PD RJA TJ TA 800 100 450 178 +150 0 to +70 - 40 to +85 mW C/W mW C/W C C Tstg - 55 to +150 C ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, for typical values TA = 25C, for min/max values TA is the operating ambient temperature range that applies [Notes 2. and 3.], unless otherwise noted.) Characteristics COMPARATOR INPUTS Threshold Voltage, Vin Increasing (TA = 25C) Threshold Voltage, Vin Increasing (TA = Tmin to Tmax) Threshold Voltage Variation (VCC = 2.0 V to 40 V) Threshold Hysteresis, Vin Decreasing Threshold Difference |Vth1 - Vth2| Reference to Threshold Difference (Vref - Vin1), (Vref - Vin2) Input Bias Current (Vin = 1.0 V) Input Bias Current (Vin = 1.5 V) MODE SELECT INPUT Mode Select Threshold Voltage (Figure 5) Channel 1 Mode Select Threshold Voltage (Figure 5) Channel 2 COMPARATOR OUTPUTS Output Sink Saturation Voltage (ISink = 2.0 mA) Output Sink Saturation Voltage (ISink = 10 mA) Output Sink Saturation Voltage (ISink = 0.25 mA, VCC = 1.0 V) Off-State Leakage Current (VOH = 40 V) REFERENCE OUTPUT Output Voltage (IO = 0 mA, TA = 25C) Load Regulation (IO = 0 mA to 2.0 mA) Line Regulation (VCC = 4.0 V to 40 V) Total Output Variation over Line, Load, and Temperature Short Circuit Current TOTAL DEVICE Power Supply Current (VMode, Vin1, Vin2 = Gnd) (VCC = 5.0 V) Power Supply Current (VMode, Vin 1, Vin 2 = Gd) (VCC = 40 V) Operating Voltage Range (Positive Sensing) Operating Voltage Range (Negative Sensing) ICC VCC - - 2.0 4.0 450 560 - - 700 900 40 40 A V Vref Regload Regline Vref ISC 2.48 - - 2.45 - 2.54 0.6 5.0 - 8.5 2.60 15 15 2.60 30 V mV mV V mA VOL - - - - 0.05 0.22 0.02 0 0.3 0.6 0.2 1.0 V Vth(CH 1) Vth(CH 2) Vref+0.15 0.3 Vref+0.23 0.63 Vref+0.30 0.9 V Vth Vth VH VD VRTD IIB 1.245 1.235 - 15 - 1.20 - - 1.27 - 7.0 25 1.0 1.27 40 85 1.295 1.295 15 35 15 1.32 200 400 V mV mV mV V nA Symbol Min Typ Max Unit IOH A 1. Maximum package power dissipation must be observed. 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. 3. Tlow = 0C for MC34161 Thigh = +70C for MC34161 -40C for MC33161 +85C for MC33161 http://onsemi.com 2 MC34161, MC33161 6.0 Vout , OUTPUT VOLTAGE (V) IIB , INPUT BIAS CURRENT (nA) VCC = 5.0 V RL = 10 k to VCC 5.0 TA = 25C 4.0 3.0 2.0 TA = 85C TA = 25C 1.0 TA = -40C 0 1.22 1.23 1.24 1.25 1.26 1.27 Vin, INPUT VOLTAGE (V) 500 400 300 200 100 0 VCC = 5.0 V VMode = Gnd TA = 25C TA = 85C TA = 25C TA = -40C 1.28 1.29 0 1.0 2.0 3.0 Vin, INPUT VOLTAGE (V) 4.0 5.0 Figure 1. Comparator Input Threshold Voltage Figure 2. Comparator Input Bias Current versus Input Voltage t PHL, OUTPUT PROPAGATION DELAY TIME (ns) 3600 Vout , OUTPUT VOLTAGE (V) VCC = 5.0 V TA = 25C 1. VMode = Gnd, Output Falling 2. VMode = VCC, Output Rising 3. VMode = VCC, Output Falling 4. VMode = Gnd, Output Rising 8.0 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 16 3000 2400 1800 1200 600 6.0 4.0 1 2 3 4 0 2.0 4.0 6.0 8.0 10 2.0 0 TA = -40C TA = -25C TA = -85C 0 2.0 4.0 VCC, SUPPLY VOLTAGE (V) 6.0 8.0 PERCENT OVERDRIVE (%) Figure 3. Output Propagation Delay Time versus Percent Overdrive Figure 4. Output Voltage versus Supply Voltage Vout , CHANNEL OUTPUT VOLTAGE (V) 6.0 5.0 4.0 3.0 2.0 1.0 0 0 TA = 85C TA = 25C TA = -40C 0.5 1.0 1.5 Channel 2 Threshold Channel 1 Threshold VCC = 5.0 V RL = 10 k to VCC I Mode , MODE SELECT INPUT CURRENT ( A) 40 35 30 25 20 15 10 5.0 0 0 1.0 2.0 3.0 4.0 VMode, MODE SELECT INPUT VOLTAGE (V) 5.0 VCC = 5.0 V TA = 25C TA = -40C TA = 85C TA = 25C 2.0 2.5 3.0 3.5 VMode, MODE SELECT INPUT VOLTAGE (V) Figure 5. Mode Select Thresholds Figure 6. Mode Select Input Current versus Input Voltage http://onsemi.com 3 MC34161, MC33161 Vref , REFERENCE OUTPUT VOLTAGE (V) 2.8 Vref, REFERENCE VOLTAGE (V) 2.4 2.0 1.6 1.2 0.8 0.4 0 0 10 20 30 VCC, SUPPLY VOLTAGE (V) VMode = Gnd TA = 25C 40 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 -55 -25 0 25 50 75 TA, AMBIENT TEMPERATURE (C) 100 125 Figure 7. Reference Voltage versus Supply Voltage Figure 8. Reference Voltage versus Ambient Temperature Vref , REFERENCE VOLTAGE CHANGE (mV) Vout , OUTPUT SATURATION VOLTAGE (V) 0 0.5 0.4 0.3 -2.0 -4.0 -6.0 VCC = 5.0 V VMode = Gnd TA = -40C VCC = 5.0 V VMode = Gnd TA = 85C TA = 25C TA = -40C TA = 85C TA = 25C 0.2 0.1 0 -8.0 -10 0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 Iref, REFERENCE SOURCE CURRENT (mA) 8.0 0 4.0 8.0 12 Iout, OUTPUT SINK CURRENT (mA) 16 Figure 9. Reference Voltage Change versus Source Current Figure 10. Output Saturation Voltage versus Output Sink Current 0.8 I CC , INPUT SUPPLY CURRENT (mA) I CC , SUPPLY CURRENT (mA) VMode = VCC Pins 2, 3 = Gnd 0.6 VMode = Gnd Pins 2, 3 = 1.5 V VMode = Vref Pin 1 = 1.5 V Pin 2 = Gnd 1.6 1.2 0.4 0.8 VCC = 5.0 V VMode = Gnd TA = 25C 0 4.0 8.0 12 Iout, OUTPUT SINK CURRENT (mA) 16 0.2 ICC measured at Pin 8 TA = 25C 0 0 10 20 30 VCC, SUPPLY VOLTAGE (V) 40 0.4 0 Figure 11. Supply Current versus Supply Voltage Figure 12. Supply Current versus Output Sink Current http://onsemi.com 4 MC34161, MC33161 VCC 8 2.54V Reference Channel 1 Output 1 6 Vref 1 Mode Select 7 Input 1 2 + + - 1.27V - + + 2.8V - + Input 2 3 + + - 1.27V + 0.6V Channel 2 Output 2 5 Gnd 4 Figure 13. MC34161 Representative Block Diagram Mode Select Pin 7 GND Vref VCC (>2.0 V) Input 1 Pin 2 0 1 0 1 0 1 Output 1 Pin 6 0 1 0 1 1 0 Input 2 Pin 3 0 1 0 1 0 1 Output 2 Pin 5 0 1 1 0 1 0 Comments Channels 1 & 2: Noninverting Channel 1: Noninverting Channel 2: Inverting Channels 1 & 2: Inverting Figure 14. Truth Table http://onsemi.com 5 MC34161, MC33161 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 13. Input Comparators 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 14 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 5. 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 A when connected to the reference output, and 42 A when connected to a VCC of 5.0 V, refer to Figure 6. Output Stage 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 M 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 latch-up as well as to suppress electrostatic discharges (ESD). The output stage uses a positive feedback base boost circuit for enhanced sink saturation, while maintaining a relatively low device standby current. Figure 10 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 4 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. 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 15 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. http://onsemi.com 6 MC34161, MC33161 VCC 8 V2 Input VS V1 Gnd Output VCC Voltage Pins 5, 6 Gnd VS2 LED `ON' R2 3+ R1 VHys VS1 R2 R1 1 7 2+ + - 1.27V + + - 1.27V 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: V1 For a specific trip voltage, the required resistor ratio is: 2.54V Reference - + 2.8V - + 0.6V + 6 5 + (Vth * VH) R2 R1 )1 V2 + Vth R2 R1 )1 R2 R1 + V V1 V * 1 th * H R2 R1 V + V2 * 1 th Figure 15. Dual Positive Overvoltage Detector VCC 8 V2 Input VS V1 R2 Gnd Output VCC Voltage Pins 5, 6 Gnd VS2 LED `ON' R2 3+ R1 R1 VHys VS1 1 7 2+ + - 1.27V + + - 1.27V 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: V1 For a specific trip voltage, the required resistor ratio is: 2.54V Reference - + 2.8V - + 0.6V + 6 5 + (Vth * VH) R2 R1 )1 V2 + Vth R2 R1 )1 R2 R1 + V V1 V * 1 th * H R2 R1 V + V2 * 1 th Figure 16. Dual Positive Undervoltage Detector http://onsemi.com 7 MC34161, MC33161 VCC 8 Gnd R2 V1 Input -VS V2 VCC Output Voltage Pins 5, 6 Gnd VHys -VS1 R2 R1 LED `ON' -VS2 3+ R1 2.54V Reference - + 2.8V - + 0.6V 1 7 2+ + - 1.27V + 6 + + - 1.27V 4 5 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 For a specific trip voltage, the required resistor ratio is: R1 R2 V *V + V 1 * V th th + R1 (Vth * Vref) ) Vth R 2 V2 + R1 (Vth * VH * Vref) ) Vth * VH R 2 R1 R2 ref V *V )V + V 2 * V th * V H th H ref Figure 17. Dual Negative Overvoltage Detector VCC 8 2.54V Reference - + 2.8V - + 0.6V Gnd V1 Input -VS V2 VCC Output Voltage Pins 5, 6 Gnd -VS2 LED `ON' VHys -VS1 R2 R1 1 7 2+ + - 1.27V + 6 R2 R1 3+ + + - 1.27V 4 5 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 For a specific trip voltage, the required resistor ratio is: R1 R2 V *V + V 1 * V th th +R R1 2 (V th * Vref) ) Vth V2 +R R1 2 (V th * VH * Vref) ) Vth * VH R1 R2 ref V *V )V + V 2 * V th * V H th H ref Figure 18. Dual Negative Undervoltage Detector http://onsemi.com 8 MC34161, MC33161 VCC 8 CH2 Input VS CH1 V4 V3 V2 V1 Gnd Output Voltage Pins 5, 6 VCC Gnd `ON' LED `OFF' LED `ON' `OFF' LED `ON' R1 3+ VHys2 VHys1 2.54V Reference - + 2.8V - + 0.6V VS R3 1 7 2+ + - 1.27V + 6 R2 + + - 1.27V 4 5 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: V1 For a specific trip voltage, the required resistor ratio is: R2 + (Vth1 * VH1) + Vth1 R3 R1 R3 R1 ) R2 ) 1 V3 + (Vth2 * VH2) + Vth2 R2 R1 R1 ) R3 ) 1 R2 R1 R2 R1 V + V3(Vth2 * VH2)) * 1 (V * V 1 th1 H1 R3 R1 R3 R1 *) + V3(V1(V Vth1 V V)H1) V * 1 th2 H2 V2 ) R2 ) 1 V4 ) R3 ) 1 V + V4 x Vth2 2 x V th1 *1 + V4(V2x*VVth1) V 2 th2 Figure 19. Positive Voltage Window Detector VCC 8 2.54V Reference - + 2.8V - + 0.6V Gnd CH2 Input -VS V1 V2 VHys1 VHys2 R3 1 7 2+ R2 LED `ON' `OFF' LED `ON' 3+ + - 1.27V + CH1 V3 V4 Output Voltage Pins 5, 6 VCC Gnd `ON' 6 + LED `OFF' R1 -VS + - 1.27V 4 5 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: + R1(Vth2 * Vref) ) Vth2 R2 ) R3 R 1(V th2 * V H2 * V ref) V2 + ) Vth2 * VH2 R2 ) R3 (R 1 ) R 2)(V th1 * V ref) V3 + ) Vth1 R3 (R 1 ) R 2)(V th1 * V H1 * Vref) V+ )V *V V1 4 For a specific trip voltage, the required resistor ratio is: V 1 * V th2 ) R3 + Vth2 * Vref V R1 th2 + V 2 * VV ) VVH2 R2 ) R3 th2 * H2 * ref * R3 + Vth1* VVref R1 ) R2 V3 th1 V th1 * V H1 * Vref R3 + V )V *V R )R R1 R2 1 2 4 H1 th1 R3 th1 H1 Figure 20. Negative Voltage Window Detector http://onsemi.com 9 MC34161, MC33161 VCC 8 Input VS2 V4 V3 Gnd V1 V2 VCC Gnd -VS1 R4 R3 R2 VS2 R1 3+ + - 1.27V 4 VHys2 1 7 2+ + - 1.27V + 2.54V Reference - + 2.8V - + 0.6V + Input -VS1 Output Voltage Pins 5, 6 VHys1 6 LED `ON' 5 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 For a specific trip voltage, the required resistor ratio is: V3 V4 (V th1 + (V 1 * VV )) th1 * ref (V R3 th1 + (V 2 * VV ) VVH1)) R4 th1 * H1 * ref R3 R4 +R +R R3 4 (V th1 (V th1 * Vref) ) Vth1 * VH1 * Vref) ) Vth1 * VH1 + (Vth2 * VH2) + Vth2 R2 R1 R2 R1 )1 R2 R1 R2 R1 + VV4 * 1 th2 R3 4 )1 + V V3 V * 1 th2 * H2 Figure 21. Positive and Negative Overvoltage Detector VCC 8 Input VS1 V2 V1 Gnd V3 Input -VS2 V4 Output VCC Voltage Pins 5, 6 Gnd R2 LED `ON' R1 -VS2 3+ + - 1.27V 4 VHys2 VS1 R4 R3 VHys1 1 7 2+ + - 1.27V + 2.54V Reference - + 2.8V - + 0.6V + 6 5 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: V1 For a specific trip voltage, the required resistor ratio is: R4 R3 R4 R3 + (Vth1 * VH1) + Vth1 R4 R3 R4 R3 )1 V3 + R1 (Vth * Vref) ) Vth2 R 2 + VV2 * 1 th1 R1 R2 R1 R2 V H2 th2 + V 4 ) VV * VV ** V th2 + V 3 * VV * th2 th2 H2 ref V2 )1 V4 + R1 (Vth * VH2 * Vref) ) Vth2 * VH2 R 2 + V V1 V * 1 th1 * H1 ref Figure 22. Positive and Negative Undervoltage Detector http://onsemi.com 10 MC34161, MC33161 VCC 8 V2 Input VS V1 R2 Gnd Output Voltage Pins 5, 6 VCC Osc `ON' Gnd 3+ + - 1.27V 4 CT RB R1 VHys VS 1 7 2+ + - 1.27V + 2.54V Reference - + 2.8V - + 0.6V RA Piezo + 6 5 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: V1 For a specific trip voltage, the required resistor ratio is: R2 R1 + (Vth * VH) R2 R1 )1 V2 + Vth R2 R1 )1 + V V1 V * 1 th * H R2 R1 V + V2 * 1 th Figure 23. Overvoltage Detector with Audio Alarm VCC 8 2.54V Reference - ++ 2.8V - + 0.6V R3 Input VS V2 V1 Gnd VHys 1 7 Output Voltage Pin 5 Output Voltage Pin 6 VCC Gnd tDLY VCC Gnd Reset LED `ON' VS R2 R1 2+ + - 1.27V + - 1.27V 6 RDLY 5 + 3+ 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: V1 For a specific trip voltage, the required resistor ratio is: R2 R1 + (Vth * VH) R2 R1 )1 V2 + Vth R2 R1 )1 tDLY = RDLYCDLY In + V V1 V * 1 th * H R2 R1 V + V2 * 1 th For known RDLY CDLY values, the reset time delay is: 1 Vth 1- VCC Figure 24. Microprocessor Reset with Time Delay http://onsemi.com 11 MC34161, MC33161 B+ MAC 228A6FP T Input 92 Vac to 276 Vac 3.0A 1 10k 7 2 100k 1.6M 3 + 1N 4742 10k 3W + 47 10 + + - 1.27V + + - 1.27V 4 + + MR506 8 2.54V Reference - + 2.8V 10k + 220 250V 75k RTN + 220 250V 75k 1.2k 6 - + 0.6V 5 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 k resistor and the 10 F capacitor. If the line voltage is greater than 150 V, the circuit will immediately return to fullwave bridge mode. Figure 25. Automatic AC Line Voltage Selector http://onsemi.com 12 MC34161, MC33161 470H Vin 12V MPS750 330 + 8 2.54V Reference - + 2.8V 470 0.01 1.8k 1N5819 + 1000 VO 5.0V/250mA 1 7 2 + - 1.27V 0.01 4.7k 1.6k + + 6 + 3 + + - 1.27V 4 - + 0.6V 5 47k 0.005 Figure 26. Step-Down Converter Test Line Regulation Load Regulation Output Ripple Efficiency Conditions Vin = 9.5 V to 24 V, IO = 250 mA Vin = 12 V, IO = 0.25 mA to 250 mA Vin = 12 V, IO = 250 mA Vin = 12 V, IO = 250 mA Results 40 mV = 0.1% 2.0 mV = 0.2% 50 mVpp 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 power-up, 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. http://onsemi.com 13 MC34161, MC33161 PACKAGE DIMENSIONS PDIP P SUFFIX CASE 626-05 ISSUE K 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. 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 8 5 -B- 1 4 F NOTE 2 -A- L C -T- SEATING PLANE J N D K M M H G 0.13 (0.005) TA M B M SO-8 D SUFFIX CASE 751-06 ISSUE T A 8 D 5 C E 1 4 H 0.25 M B M h B C e A SEATING PLANE X 45 _ NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. DIMENSIONS ARE IN MILLIMETER. 3. DIMENSION D AND E DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. 5. DIMENSION B DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS OF THE B DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A A1 B C D E e H h L MILLIMETERS MIN MAX 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 4.80 5.00 3.80 4.00 1.27 BSC 5.80 6.20 0.25 0.50 0.40 1.25 0_ 7_ q L 0.10 A1 B 0.25 M CB S A S q http://onsemi.com 14 MC34161, MC33161 Notes http://onsemi.com 15 MC34161, MC33161 ON Semiconductor and are 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. PUBLICATION ORDERING INFORMATION NORTH AMERICA Literature Fulfillment: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: ONlit@hibbertco.com Fax Response Line: 303-675-2167 or 800-344-3810 Toll Free USA/Canada N. American Technical Support: 800-282-9855 Toll Free USA/Canada EUROPE: LDC for ON Semiconductor - European Support German Phone: (+1) 303-308-7140 (M-F 1:00pm to 5:00pm Munich Time) Email: ONlit-german@hibbertco.com French Phone: (+1) 303-308-7141 (M-F 1:00pm to 5:00pm Toulouse Time) Email: ONlit-french@hibbertco.com English Phone: (+1) 303-308-7142 (M-F 12:00pm to 5:00pm UK Time) Email: ONlit@hibbertco.com EUROPEAN TOLL-FREE ACCESS*: 00-800-4422-3781 *Available from Germany, France, Italy, England, Ireland CENTRAL/SOUTH AMERICA: Spanish Phone: 303-308-7143 (Mon-Fri 8:00am to 5:00pm MST) Email: ONlit-spanish@hibbertco.com ASIA/PACIFIC: LDC for ON Semiconductor - Asia Support Phone: 303-675-2121 (Tue-Fri 9:00am to 1:00pm, Hong Kong Time) Toll Free from Hong Kong & Singapore: 001-800-4422-3781 Email: ONlit-asia@hibbertco.com JAPAN: ON Semiconductor, Japan Customer Focus Center 4-32-1 Nishi-Gotanda, Shinagawa-ku, Tokyo, Japan 141-8549 Phone: 81-3-5740-2745 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com 16 MC34161/D |
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