MAX610 MAXIM [Maxim Integrated Products], MAX610 Datasheet - Page 5

• Manufacturer Part Number: MAX610
• Description: AC-to-DC Regulator(110/220VAC to 5.0VDC)
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 4. 110/220VAC to 5V, Half-Wave Rectification
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 V
Other output voltages can be selected by connecting
an external resistive voltage divider between the output
and V
values for other voltages using the formula:
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 out-
put 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.
Figure 8 shows how a resistor, R
to any of the above circuits to provide short-circuit cur-
rent-limit protection. A voltage difference between
V
(approximately 0.6V) activates the MAX610/MAX611/
MAX612 output-current-limit protection circuitry.
SENSE
* FOR 220VAC, 50Hz INPUT:
* FOR 220VAC, 60Hz INPUT:
117VAC
R1 = 100 , 1W
C1 = 1.8 F, 280V
R1 = 100 , 1W
C1 = 1.5 F, 280V
60Hz
SET
1/2W
47
R1*
and V
as shown in Figure 7. Calculate the resistor
150V
RMS
RMS
V
2.7 F
OUT
C1*
1M
OUT
Output Circuit Current Limiting
N.C.
N.C.
RMS
_______________________________________________________________________________________
greater than a base-emitter voltage
7
1
4
Adjustable Output Voltage
1 3
RD
AC1
AC2
.
V-
V x
2
MAX611
(
1
SENSE
V
R
R
SET
SENSE
V
V+
OUV
2
3
OUT
8
100 F
16V
)
, can be added
terminal to V-.
6
5
3
+5V
TO P
RESET
+12V
(110/220VAC to 5.0VDC)
When current limiting occurs, the voltage at V
fall below 4.65V, causing the OUV output to go low.
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 (V
put voltage. Both the MAX610/MAX612’s OUV pin and
the MAX611’s OUV pin go low immediately after the out-
put 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
Figure 5. Minimum-Component-Count 10mA, 5V Supply
Figure 6. Transformer-Isolated 5V Power Supply
117VAC
117VAC
AC-to-DC Regulator
I
CURRENT LIMIT
8.2k
8V
2W
R1
RMS
4.7
R1
0.01 F
7
1
AC1
AC2
V
7
1
SET
4
AC1
AC2
V
MAX610
SET
Power-Up Reset Delay
SET
4
V-
MAX612
2
R
47 F
) is used to adjust the out-
16V
SENSE
. 0 6
V-
2
V
470 F
SENSE
25V
V
V+
OUV
V
OUT
8
V
SENSE
V
V+
OUV
OUT
6
5
3
8
6
5
3
UNREGULATED
+10V
SENSE
DC
+5V
AT 10mA
TO P
RESET
+5VDC
TO P
RESET
will
5