View MAX610_335105.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-0914; Rev 1; 12/94
AC-to-DC Regulator (110/220VAC to 5.0VDC)
_______________General Description
The MAX610/MAX611/MAX612 AC-to-DC power converters reduce the component count, size, and weight of 1/4 watt power supplies, thus minimizing the overall cost and simplifying designs. With an 8VRMS input voltage, the MAX610 needs only a single filter capacitor to make a complete 5V, 50mA power supply. With the addition of a current-limiting resistor and a current-limiting capacitor, the MAX610 connects directly to the 110VAC or 220VAC power line to make a minimum component count 110/220VAC to 5VDC power supply. The devices in the MAX610 family differ in three respects: full- or half-wave rectification, 12V or 18V zener voltage, and the assignment of pin 4 to the function of setting the output voltage or setting the time delay. The MAX610 has a full-wave rectifier, a 12V zener, and the output voltage is either the internally preset +5V or user adjustable from +1.3V to +9V. The MAX611 has a half-wave rectifier, a 12V zener, a fixed +5V output, and pin 4 controls the time delay of the reset output. The MAX612 has a full-wave rectifier, an 18V zener, and the output voltage is either the internally preset +5V or user adjustable from +1.3V to +15V The low-cost MAX610 family is ideal for applications where the size, weight, and component count of 1/4 watt power supplies must be reduced. Reliable power-up reset and over/undervoltage detection make these devices well suited for microprocessor-based controllers.
____________________________Features
o Direct 110/220VAC to 5VDC Conversion o Minimum External Component Count o Output Voltage Preset to 5V 4% o 70A Typical Quiescent Current o Over/Undervoltage Detection o Power-Up Reset Circuit with Programmable Delay o Programmable Current Limiting o Programmable Output Voltage: 1.3V to 15V
MAX610/MAX611/MAX612
______________Ordering Information
PART MAX610CPA MAX610CSA MAX611CPA MAX611CSA MAX612CPA MAX612CSA TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C 0C to +70C 0C to +70C 0C to +70C PIN-PACKAGE 8 Plastic DIP 8 SO 8 Plastic DIP 8 SO 8 Plastic DIP 8 SO
________________________Applications
Minimum-Component-Count Power Supplies Uninterruptible 5V Power Supplies Precision Battery Chargers Line-Powered Appliances Industrial Controls Off-Line Instruments Triac Output Power Controllers
_________________Pin Configurations
TOP VIEW
AC2 1 V- 2 OUV 3 VSET 4
8 7
V+ AC1 VOUT VSENSE
MAX610 MAX612
6 5
__________Typical Operating Circuit
+5V DC OUTPUT
DIP/SO
AC1 110/220VAC INPUT AC2 VSET VVSENSE N.C. 1 8 7 V+ AC1 VOUT VSENSE VOUT
MAX610 OUV
V+
TO P RESET
V- 2 OUV 3 RD 4
MAX611
6 5
+12V DC OUTPUT
DIP/SO
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
AC-to-DC Regulator (110/220VAC to 5.0VDC) MAX610/MAX611/MAX612
ABSOLUTE MAXIMUM RATINGS
Operating Temperature Range...............................0C to +70C Maximum Junction Temperature ....................................+125C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C Power Dissipation at +70C Input Current MAX611 AC1, V-: 250s non-repetitive pulse ...................................5A AC1, V-: continuous...............................................180mARMS V+....................................................................................60mA MAX610, MAX612 AC1, AC2: 250s non-repetitive pulse................................5A AC1, AC2: continuous .........................................120mA RMS V+....................................................................................60mA All Other Terminals............................................................10mA Input Voltage MAX610/MAX611 (Note 1) AC1, AC2 ........................................................................11.5V V+....................................................................................10.8V MAX612 AC1, AC2 ...........................................................................17V V+....................................................................................16.2V CUV..............................................................(V- - 0.3V) to -16V All Other Terminals ...........................(V- - 0.3V) to (V+ + 0.3V) Output Current V+, VOUT .........................................................................60mA OUV.................................................................................10mA
Note 1: The maximum input voltage may be exceeded if the maximum input current and power dissipation specifications are observed.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(TA = +25C, V+ = 10V, RSENSE = 0, VSET connected to V-, unless otherwise noted.) PARAMETER Diode Forward Voltage Zener Voltage Zener Dynamic Resistance SERIES VOLTAGE REGULATOR Preset Output Voltage Temperature Coefficient of Output Voltage Internal Voltage Reference Line Regulation (DC Input) VOUT VOUT T VSET VOUT V VOUT VAC VOUT IOUT V+ - VOUT ISET I+ 0.5mA IOUT 50mA TA = 0C to +70C MAX610/MAX612 8V V+ VZ IOUT = 10mA, Figures 3, 4 70VRMS < VIN < 140VRMS 140VRMS < VIN < 280VRMS TA = +25C TA = 0C to +70C 4.80 4.75 5.00 5.00 100 1.3 0.25 0.001 %/V 0.001 0.6 1.1 0.01 70 2.0 2.0 100 150 V nA A 5.20 5.25 V ppm/C V %/V SYMBOL VF VZ RZ IF = 1mA IF = 50mA IZ = 50mA, measure at V+ IZ = 50mA MAX610/MAX611 MAX612 MAX610/MAX611 MAX612 CONDITIONS MIN TYP 0.62 1.1 12.4 18.6 6 9 MAX 2.0 UNITS V V
Line Regulation (AC Input)
Output Impedance Input-Output Voltage Differential VSET Input Current Supply Current
IOUT changing from 1mA to 51mA IOUT = 25mA
2
_______________________________________________________________________________________
AC-to-DC Regulator (110/220VAC to 5.0VDC)
ELECTRICAL CHARACTERISTICS (continued)
(TA = +25C, V+ = 10V, RSENSE = 0, VSET connected to V-, unless otherwise noted.) PARAMETER Overvoltage Detection Voltage Undervoltage Detection Voltage OUV Output Leakage OUV Output Voltage SYMBOL VOUVH VOUVL IOUV VOUV CONDITIONS Measured at VSENSE Measured at VSENSE VSENSE = 5V, OUV = 5V VSENSE 5.65V or VSENSE 4.35V, IOUV = 1mA Figure 9a, MAX611 only, C3 = 0.01F MAX611 only, V+ = VZ 30 8.0 4.35 MIN TYP 5.4 4.65 0.001 10 0.4 MAX 5.65 UNITS V V A V
MAX610/MAX611/MAX612
Reset Time Delay Reset Pin Threshold
tDELAY VTH
ms V
______________________________________________________________Pin Description
PIN NAME AC2 (MAX610/612) 1 N.C. (MAX611) 2 3 VOUV This pin is not connected on the MAX611. Negative output terminal. This terminal is also an AC input for the half-wave rectifier of the MAX611. The open-drain pin goes low during undervoltage and overvoltage conditions. The undervoltage and overvoltage thresholds are fixed at 4.65V (undervoltage) and 5.4V (overvoltage) and do not change, even if the output voltage is changed via the VSET terminal. Current-limit input. The output short-circuit current limit is 0.6V/RSENSE, where RSENSE is a current-sensing resistor connected between VOUT and VSENSE. Positive regulated DC output. AC input to the internal diode rectifier An external capacitor connected to the Reset Delay pin determines the Reset Delay period. The reset time delay is directly proportional to the capacitance connected to this pin; each 0.01F of capacitance results in 30 milliseconds of delay. This delay period must elapse before the Reset/OUV pin goes high after an overvoltage or undervoltage condition (Figure 9). If the VSET terminal is grounded, the MAX610 and MAX612 output voltage will be the preset 5V 4%. Alternatively, the VSET input can be used to set the output voltage to any voltage from 1.3V to 15V (MAX612) or 1.3V to 10V (MAX610/MAX611), using a simple resistive voltage divider (Figure 7). Positive unregulated or raw DC output of the rectifier. The raw DC filter capacitor connects to this terminal. FUNCTION Second AC input to the full- wave bridge rectifier.
5 6 7
VSENSE VOUT AC1
RD (MAX611) 4 VSET (MAX610/612) 8 V+
_______________________________________________________________________________________
3
AC-to-DC Regulator (110/220VAC to 5.0VDC) MAX610/MAX611/MAX612
_____________________________________________________________Block Diagrams
OVER/UNDER VOLTAGE DETECTOR OUV V+ VOUT * * 12.4V ZENER IN MAX610 18.6V ZENER IN MAX612 SERIES REGULATOR VSENSE VSET AC1 12.4V ZENER VSERIES REGULATOR VOUT VSENSE RESET DELAY OUV
V+ AC1 VAC2
OVER/UNDER VOLTAGE DETECTOR AND DELAY
Figure 1. MAX610/MAX612 Block Diagram
Figure 2. MAX611 Block Diagram
_______________Typical Applications
Simple Line-Powered 5V Supply
Figure 3 shows a 50mA, 5V power supply using the fullwave MAX610. Typical component values for both 110VAC and 220VAC 50/60Hz operation are shown. The output of this power supply is NOT ISOLATED from the power line: the MAX610 and any equipment powered by the MAX610 must be enclosed to avoid shock hazards. To avoid a second potential shock hazard, include the 1M resistor across C1. This resistor will discharge the voltage left on C1 when the 110/220VAC is disconnected.
Transformer-Isolated 5V Power Supply
If isolation from the power line is required, use the MAX612 in the circuit of Figure 6. The MAX612 must have an input voltage of at least 8V peak to maintain a regulated 5V output, but the peak transformer output voltage must not exceed 17V unless the current is limited as shown in Figures 3 and 4. The AC input line voltage can range from 80V RMS to 160V RMS with the 8VRMS nominal transformer voltage shown. The MAX612 power dissipation is approximately (VIN(peak) - VOUT) x ILOAD. With the 8VRMS transformer shown, the power dissipated in the MAX612 limits the maximum output current to 60mA at +25C ambient and 30mA at +70C. Resistor R1 limits the peak input current, but is not needed if the transformer impedance limits the peak current to a suitable value. As a rule of thumb, R1 can be omitted if the short-circuit output current of the transformer is less than 2A.
R1* 47 1/2W C1* 1.5F 150VRMS
110/220VAC to 5V, Half-Wave Rectification
Figure 4 shows a 50mA, 5V power supply using the halfwave MAX611. The circuit differs from Figure 3 in that the 5V output is referenced to one side of the 110VAC power line. This circuit is generally preferred for systems that control triacs, where it is desirable to connect V- to the power line. Note that for a given amount of output current, the value of C1 must be twice the value used in the full-wave circuit of Figure 3. As with all MAX610 family circuits that do not use a transformer to isolate the circuit, this circuit is NOT ISOLATED from the power line.
7
AC1
VOUT VSENSE
6 5 3
+5V REGULATED DC
1M 117VAC 60Hz 1 * FOR 220VAC, 50Hz INPUT: R1 = 100, 1W C1 = 1F, 280VRMS * FOR 220VAC, 60Hz INPUT: R1 = 100, 1W C1 = 0.82F, 280VRMS AC2 VSET 4
Minimum-Component-Count 10mA, 5V Power Supply
For output currents of less than 10mA, capacitor C1 of Figure 3 can be omitted, resulting in the circuit shown in Figure 5. The available output current is determined by the value of R1. For example, with R1 = 8.2k, the available output current is 10mA, while the power dissipation in R1 is 1.3W. Double both the resistance value and the wattage rating of R1 for use with a 220VAC input.
MAX610
V2 C2 47F 16VDC
OUV V+ 8
TO P RESET
+12VDC
Figure 3. Simple Line-Powered 5V Supply
4 _______________________________________________________________________________________
AC-to-DC Regulator (110/220VAC to 5.0VDC) MAX610/MAX611/MAX612
R1* 47 1/2W C1* 2.7F 150VRMS 7 6 5 3 TO P RESET R1 8.2k 2W +5V 117VAC VSENSE N.C. N.C. * FOR 220VAC, 50Hz INPUT: R1 = 100, 1W C1 = 1.8F, 280VRMS * FOR 220VAC, 60Hz INPUT: R1 = 100, 1W C1 = 1.5F, 280VRMS 1 4 AC2 RD V2 V+ 8 +12V 100F 16V 47F 16V VSET 4 V2 V+ 8 1 AC2 VSENSE 5 3 TO P RESET 7 VOUT 6 +5V AT 10mA
AC1
VOUT
AC1
117VAC 60Hz
1M
MAX611
OUV
MAX610
OUV
Figure 4. 110/220VAC to 5V, Half-Wave Rectification
Figure 5. Minimum-Component-Count 10mA, 5V Supply
Adjustable Output Voltage
The MAX611 output voltage is fixed at 5V 4%. The MAX610 and MAX612 output voltages can be set to 5V 4% by simply connecting the VSET terminal to V-. Other output voltages can be selected by connecting an external resistive voltage divider between the output and VSET as shown in Figure 7. Calculate the resistor values for other voltages using the formula: R2 ) R3 The maximum input voltage to the MAX612 is limited to 16V, enabling the MAX612 to supply any voltage from 1.3V to 15V. The maximum input voltage to the MAX610 is 10V, and the MAX610 can supply any output voltage from 1.3V to 9V. The output voltage of the standard MAX610 is set to 5V 4% with an undervoltage trip point of 4.65V and an overvoltage trip point of 5.4V. Other output voltages are available through fusible link programming. The overvoltage and undervoltage trip points are fixed at 107% and 93% of the pretrimmed output voltage. Consult the factory regarding availability and minimum order requirements for preset voltages other than 5V. VOUT = 1.3V x ( 1 +
ICURRENT LIMIT =
0.6V RSENSE
When current limiting occurs, the voltage at VSENSE will fall below 4.65V, causing the OUV output to go low.
Power-Up Reset Delay
The MAX611 differs from the MAX610/MAX612 in that its pin 4 (RD) controls a reset delay period, whereas the MAX610/MAX612's pin 4 (VSET) is used to adjust the output voltage. Both the MAX610/MAX612's OUV pin and the MAX611's OUV pin go low immediately after the output voltage goes below the undervoltage or above the overvoltage threshold. The MAX610/MAX612 OUV pin will go high immediately after the output returns to 5V. The MAX611 OUV pin will go high only after the output
R1 4.7
7
AC1
VOUT VSENSE
6 5 3
+5VDC
0.01F 117VAC 8VRMS 1
AC2
MAX612
OUV
TO P RESET
Output Circuit Current Limiting
Figure 8 shows how a resistor, RSENSE, can be added to any of the above circuits to provide short-circuit current-limit protection. A voltage difference between VSENSE and VOUT greater than a base-emitter voltage (approximately 0.6V) activates the MAX610/MAX611/ MAX612 output-current-limit protection circuitry.
VSET 4 V2 V+ 8 +10V UNREGULATED DC
470F 25V
Figure 6. Transformer-Isolated 5V Power Supply
_______________________________________________________________________________________ 5
AC-to-DC Regulator (110/220VAC to 5.0VDC) MAX610/MAX611/MAX612
R1* 47 1/2W C1* 0.5F 7 1M 117VAC 1 VSENSE AC1 VOUT 6 5 4 R3 VOUT = 1.3 1 + VOUT +1.3V TO +9V R1 47 1/2W C1 1.5F 150VRMS 7 1M AC1 VOUT VSENSE 1 AC2 6 5 3 ICL = 0.6V RSENSE RSENSE
R2 117VAC
MAX610 AC2
VSET
MAX610
OUV
(
R2 R3
)
V2
OUV V+ 8
3
VSET 4 +12V
V2
V+ 8
47F 16VDC
Figure 7. Adjustable Output Voltage
Figure 8. Short-Circuit Current Limiting
R1 47 1/2W C1 2F 150VRMS 7 1M 117VAC 1 VSENSE N.C. AC1 VOUT 6 5 +5V
has been at 5V for a delay period determined by the value of a capacitor connected between V- and RD. This makes the OUV output well suited for driving the reset input of microprocessors. Upon power-up, the MAX611 OUV output will stay low until the output has been at 5V for the length of the delay period (Figure 9). This provides a reliable power-up reset to the microprocessor. Whenever the MAX611 output falls below 4.65V (as during a brownout), the OUV pin will go low, resetting the microprocessor. The output voltage must remain above 4.65V for the entire delay period before the OUV pin will go high: each time the voltage falls below 4.65V the reset delay period is restarted. The delay period is approximately 30 milliseconds for each 0.01F of capacitance. Leave pin 4 floating if this additional delay is not desired.
MAX611
OUV RD 3 4 TO P RESET
V2 tDELAY = C3 x C3 (in sec) (in F)
V+ 8 C2 C3
+12V Output for Driving Triacs, Relays, and MOSFETs
In some circuits, a voltage higher than 5V is needed to drive relays, triacs, or power MOSFET gates. The DC output voltage at V+ is +12V (+18V for MAX612) and can be used to trigger triacs as shown in Figure 11. The V+ voltage is equal to the MAX610/MAX611 zener voltage until the load current (total current drawn from the +12V and the +5V) approaches the maximum available output current (40mA for each F of C1 capacitance with 110VAC 60Hz input, 70mA/F with 220VAC 50Hz input). The ripple on the +12V is relatively low. With the components shown in Figure 10 the ripple voltage is about 5mVp-p at 10mA load current and 20mV at 40mA load current.
Figure 9a. Power-Up Reset Delay
Uninterruptible 5V Power Supply
Figure 11 shows a simple way to combine a MAX610 with a battery to form an uninterruptible 5V power supply. When the 110VAC line voltage is present, resistor R2 trickle charges the 7.2V NiCd battery. When the 110VAC is removed, the NiCd battery will supply current through diode D1, and the MAX610 output will remain a constant 5V. The MAX610 will continue to deliver 5V out until V+ is approximately 5.8V and the battery voltage is approximately 6.5V. Alkaline 9V or NiCd 8.4V batteries are also suitable; R2 should not be used with the non-rechargeable 9V alkaline battery. If isolation from the power line is required, drive AC1 and AC2 with a transformer as shown in Figure 6.
6
_______________________________________________________________________________________
AC-to-DC Regulator (110/220VAC to 5.0VDC) MAX610/MAX611/MAX612
+12V V+ +1.5V OUTPUT MOMENTARILY SHORTED 4.65V VOUT OUV OUTPUT INDETERMINATE WHEN V+ < 1.8V 0V tDELAY OFF (OPEN) OUV tDELAY 500 tDELAY tDELAY t < tDELAY +6V
OUTPUT SHORTED TO ANOTHER POWER SUPPLY
+1.5V
5.36V
ON (SINKING CURRENT)
Figure 9b. Power-Up Reset Delay
Polarity Insensitive Battery-Powered Supply
Figure 12 shows a +5V power supply that works even if the battery is installed backwards: the full-wave bridge rectifier of the MAX612 corrects the battery polarity. The MAX612 is well suited for battery-powered circuits since its quiescent current is only 70A. The MAX610 can also be used if the battery voltage is less than 10V.
R1 47 1/2W C1 2F 7 1M VSENSE 1 4 N.C. RD VAC LOAD 2 470F 15V TO AC LOAD 1k LEVEL SHIFTER OR OPENCOLLECTOR BUFFER SUCH AS MC14504 OR MM74C907 +12V OUTPUT V+ 8 AC1 VOUT 6 5 3 +5V CONTROL SYSTEM
117VAC POWER LINE
Battery Charger
The +6.7V open circuit or float voltage of Figure 13 is set by R2 and R3; the maximum charging current of 60mA is set by the value of C1. Since, unlike transformer-driven battery chargers, C1 conducts current throughout most of each line cycle, the ratio of the RMS charging current to the average charging current is only about 1.2:1, and capacitor C2 is optional. IAVG(MAX) = VIN x 5.56 FIN x C1 (maximum charging current) (A) FIN = Input Frequency IRMS = 1.2 IAVG; without C2 IRMS = IAVG; with C2. The half-wave MAX611 can also be used in this circuit, but the value of C1 must be doubled and the ratio of RMS current to average current increases to about 1.7:1.
MAX611
OUV
5V LOGIC LEVEL
Figure 10. Driving Triacs with +12V Supply
_______________________________________________________________________________________
7
AC-to-DC Regulator (110/220VAC to 5.0VDC) MAX610/MAX611/MAX612
R1 47 1/2W C1 1F 175VRMS 7 6 5 3 UNINTERRUPTIBLE +5V DC OUTPUT 7 AC1 VOUT VSENSE 1 AC2 6 5 3 +5V
AC1
VOUT VSENSE
1M 117VAC 60Hz 1 4 AC2 VSET V2 V+ 8
BATTERY
MAX610
MAX612
OUV
OUV
VSET 4
V2
V+ 8 VOUT = | VBATTERY | - 0.6V
1N4001
R2 1.8k
10F 25V
C2 47F 16V
7.2V NiCd BATTERY
Figure 12. Polarity Insensitive Battery-Powered Supply
Figure 11. Uninterruptible 5V Power Supply
______________Component Selection
The component values shown in the Typical Applications section are suitable for most applications. The following section gives the reasons for the particular component values chosen, explains the effect of using other values, and discusses the component specifications.
47 1/2W
1.5F 150VRMS 7 1M AC1 VOUT 6 +6.7V
117VAC 60Hz 1 AC2
MAX610
VSENSE VSET
5 4
R2 10k
6V GEL CELL BATTERY
Current-Limiting Capacitor, C1
The current-limiting capacitor (C1) is the most critical component for a 110/220VAC input power supply based on the MAX610 family. It must continuously withstand the full line voltage, so it should be rated for AC operation. A conservative designer will use a capacitor rated for at least 150VRMS working voltage for 110VAC circuits, and at least 280VRMS for 220VAC or 240VAC circuits. This capacitor must be a non-polarized type such as polyester (MylarTM) or polypropylene metallized film. Metallized film capacitors are preferred over metal foil capacitors, since metal foil capacitors are more likely to fail as a short circuit. The value of C1 determines both the power dissipation of the MAX610/MAX611/MAX612 and the maximum available output current. The value of C1 should be the smallest value that will deliver the desired output current at minimum line voltage, since the power dissipated by the MAX610/MAX611/MAX612 increases with increasing values of C1. Table 1 gives the formula for calculating C1 as a function of the desired output current. Table 2 shows some typical component suppliers and part numbers.
V2 V+ 8 C2 100F 16V
R3 2.4k
Figure 13. Simple Battery Charger
Current-Limiting Resistor, R1
The current-limiting resistor (R1) limits the maximum peak current that occurs when power is first applied to the MAX610 just as the power line voltage is at its maximum. The instantaneous peak current must be limited to 5A. For 110VAC, input voltage R1 must be 33 or greater; for 220VAC, input voltage R1 must be 68 or greater. The recommended values are 47 for 110VAC and 100 for 220VAC. The power dissipation in R1 is constant, independent of the load current.
8
_______________________________________________________________________________________
AC-to-DC Regulator (110/220VAC to 5.0VDC) MAX610/MAX611/MAX612
Table 1. Design Formulas
FORMULA VOUT = 5 V 4%, VSET g rounded VOUT = 1.3V (1 + R2 ) R3 2 x VRMS x FIN 2 x VRMS x FIN EXAMPLE IN FIGURE No: 3 8 3 4 9 MAX610 and MAX612 Full wave--MAX610, MAX612 Half wave--MAX611 COMMENTS
IOUT(MAX ) = C1 x 4 IOUT(MAX ) = C1 x 2 ICURRENT LIMIT = C1 = C1 =
0.6V R SENSE
IOUT(MAX ) (VRMS - VOUT ) x 4 IOUT(MAX ) (VRMS - VOUT ) x 2 2 x FIN 2 x FIN
3
Full wave--MAX610, MAX612
4
Half wave--MAX611
Time delay = C3 x 3 (in secs) (in F)
10
MAX611 only
With 110VAC, 60Hz input: Pd (R1) = 1.6 x C12 x R1 (in mW) (in F) (in ) With 220VAC, 50Hz input: Pd (R1) = 2.7 x C12 x R1 (in mW) (in F) (in )
Table 2. Component Manufacturers
MANUFACTURER PART NO. ECQ-E2105KF ECQ-E2155KF Panasonic ECQ-E2275KF ECQ-E6105KF ECQ-E6155KF Aavid 5801B DESCRIPTION 1F, 250VDC metallized polypropylene capacitor 1.5F, 250VDC metallized polypropylene capacitor 2.7F, 250VDC metallized polypropylene capacitor 1F, 630VDC metallized polypropylene capacitor 1.5F, 630VDC metallized polypropylene capacitor Slip-on heatsink for 8-pin plastic DIP Aavid Engineering, Inc. 30 Cook Ct., Box 400 Laconia, NH 03247 (603) 524-4443
Raw DC Filter Capacitor, C2
The raw DC filter capacitor (C2) is normally an aluminum or tantalum electrolytic capacitor. C2 is ordinarily 47F when the MAX610/MAX612 are driven from the 110/220VAC power line. The half-wave MAX611 requires larger values for C2 since the output current is supplied by C2 for one-half of each line cycle.
Reset Delay Capacitor
The reset delay capacitor, labeled C3 in Figure 9a, is non-critical and is usually a low-cost ceramic capacitor.
Panasonic Industrial Company Electronic Components Division 1600 McCandless Drive Milpitas, CA 95035 (408) 946-4311
_______________________________________________________________________________________
9
AC-to-DC Regulator (110/220VAC to 5.0VDC) MAX610/MAX611/MAX612
___Cautions and Application Hints
1) Unless driven by a transformer, the 5V output of the MAX610/MAX611/MAX612 is NOT ISOLATED from the power line, and all circuitry connected to the MAX610/MAX611/MAX612 should be treated as if it were directly connected to the power line. The MAX610/MAX611/MAX612, its circuitry, and all components driven by the 5V output present a shock hazard and should be in a protective enclosure to prevent accidental contact. 2) Use an isolation transformer or ground fault interrupter (GFI) when breadboarding, testing, or trouble-shooting a MAX610 family based power supply or any circuitry powered by the MAX610 family. If the MAX610/MAX611/MAX612 is connected directly to the power line, do NOT connect the ground of an oscilloscope to the circuit--this will severely damage the oscilloscope and destroy the MAX610/MAX611/MAX612. 3) When the 110/220VAC input is disconnected from a MAX610 family based power supply, the input capacitor, C1, may be left charged to the peak input line voltage, creating a shock hazard on the input terminals. The 1M resistor shown in Figure 3 is recommended for use in any of the circuits when the input to the power supply may be disconnected or where the input capacitor must be discharged to prevent shock hazards to maintenance or service personnel. 4) C1 must be able to withstand the peak AC input voltage. The power source should be properly fused. 5) Observe th power dissipation limit. Excessive power dissipation will cause the junction temperature to rise above the absolute maximum rating and will degrade reliability. 6) Use the minimum value of C1 that will deliver the desired output current. Minimizing the value of C1 minimizes the dissipation of the MAX610/MAX611/ MAX612, thus increasing the reliability of the power supply. 7) The over/undervoltage detection circuit is set up for 5V operation. Even if the VSET terminal is used to set another output voltage, the over/undervoltage detection is left set at 4.65V and 5.4V. 8) If the value of C2, the raw DC filter capacitor, is above 750F, limit the maximum output current by inserting a resistor between V OUT and V SENSE . This prevents damage to the MAX610/MAX611/ MAX612 that might occur if the energy stored in a large valued C2 were discharged into a short circuit. If C2 is below 750F, this protection is not necessary. 9) While the MAX610 family is stable without an output filter capacitor, it is good engineering practice to have power-supply bypass capacitors on the output to compensate for the increased output impedance of the MAX610/MAX611/MAX612 at high frequency. A 47F in parallel with a 0.1F will keep the effective output impedance low from DC to greater than 1MHz. 10) When powering the MAX610 or MAX612 through the V+ terminal and using only the DC linear regulator, connect both AC1 and AC2 terminals to V-. When using only the DC linear regulator portion of the MAX611, the AC1 terminal should be connected to V-. 11) A 0.01F (50V) capacitor connected between AC1 and AC2 for the MAX610/MAX612 or between AC1 and GND for the MAX611 protects the bridge rectifier from damage due to input transients.
10
______________________________________________________________________________________
AC-to-DC Regulator (110/220VAC to 5.0VDC)
________________________________________________________Package Information
E D A3 A A2 E1
DIM A A1 A2 A3 B B1 C D1 E E1 e eA eB L INCHES MAX MIN 0.200 - - 0.015 0.175 0.125 0.080 0.055 0.022 0.016 0.065 0.045 0.012 0.008 0.080 0.005 0.325 0.300 0.310 0.240 - 0.100 - 0.300 0.400 - 0.150 0.115 INCHES MIN MAX 0.348 0.390 0.735 0.765 0.745 0.765 0.885 0.915 1.015 1.045 1.14 1.265 MILLIMETERS MIN MAX - 5.08 0.38 - 3.18 4.45 1.40 2.03 0.41 0.56 1.14 1.65 0.20 0.30 0.13 2.03 7.62 8.26 6.10 7.87 2.54 - 7.62 - - 10.16 2.92 3.81 MILLIMETERS MIN MAX 8.84 9.91 18.67 19.43 18.92 19.43 22.48 23.24 25.78 26.54 28.96 32.13
21-0043A
MAX610/MAX611/MAX612
L A1 e B D1
0 - 15 C B1 eA eB
Plastic DIP PLASTIC DUAL-IN-LINE PACKAGE (0.300 in.)
PKG. DIM PINS P P P P P N D D D D D D 8 14 16 18 20 24
______________________________________________________________________________________
11
AC-to-DC Regulator (110/220VAC to 5.0VDC) MAX610/MAX611/MAX612
___________________________________________Package Information (continued)
DIM INCHES MAX MIN 0.069 0.053 0.010 0.004 0.019 0.014 0.010 0.007 0.157 0.150 0.050 0.244 0.228 0.050 0.016 MILLIMETERS MIN MAX 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 3.80 4.00 1.27 5.80 6.20 0.40 1.27
D A e B
0.101mm 0.004in.
0-8
A1
C
L
A A1 B C E e H L
E
H
Narrow SO SMALL-OUTLINE PACKAGE (0.150 in.)
DIM PINS D D D 8 14 16
INCHES MILLIMETERS MIN MAX MIN MAX 0.189 0.197 4.80 5.00 0.337 0.344 8.55 8.75 0.386 0.394 9.80 10.00
21-0041A
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 (c) 1994 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

▲Up To Search▲

Price & Availability of MAX610

	To Download MAX610 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .