Regulator ICs
AC / DC converter unit
The BP5040 is an AC / DC converter which can be used to supply 5V, 100mA DC output from a commercial power
supply (200 to 230V AC). Using this unit enables simple, easy drive of microcomputers, LEDs, and other electronic components without using a transformer. It also allows set PCBs to be kept compact and lightweight, with extremely few
Power supply circuits for vacuum cleaners, refrigerators,
washing machines, air conditioners, irons, electric carpets, cordless telephones, air purifiers, humidifiers, dehumidifiers, home bakery devices, electric hot water pots
and rice cookers, illumination devices and other small
household appliances, as well as power supply circuits
for gas leakage sensors, and other industrial products
1) Elimination of a transformer enables compact, lightweight power supply boards.
2) Wide input voltage range (226 to 358V DC for DC
voltage conversion, 160 to 253V for AC voltage conversion)
3) DC power supplies can be easily configured, with few
4) Since no transformer is used, the power supply board
is less vulnerable to splitting or cracking from impact
or shock.
5) Hybridization of the IC reduces the number of labor
hours in the assembly process.
Absolute maximum ratings (Ta = 25C)
Recommended operating conditions
Regulator ICs
Electrical characteristics (Ta = 25C)
Pin descriptions
Regulator ICs
Measurement circuit
Basic power supply circuit
Regulator ICs
Application example
Example showing product used in vacuum cleaner
The diode bridge is used to extract zero cross signals.
Consequently, if zero cross signals are not required, no diode bridge is required.
Selecting attached components
(1) Diodes
The rectifying diodes used should fulfill the following
In the absolute maximum ratings, the reverse surge current should be 700V or higher, the average rectifying current should be 0.5A or higher, and the forward surge voltage should be 20A or higher.
(2) Capacitor for input voltage smoothing
A capacitor with a larger capacitance produces a more
stable output voltage, but increases the surge current
when the power supply is turned on. A capacitor of between 3.3µF and 10µF is recommended. The capacitor
should have a withstand resistance of at least 400V.
Operation notes
(1) The output current needs to be reduced as the ambient temperature rises.
(2) Lead pins should be securely soldered. Avoid subjecting this product to strong impact.
(3) Excessive current and shorted loads
The excessive current limit is a drooping model of
approximately 160mA. At 25C, if excessive output current of higher than 100mA is produced intermittently, or
is produced continuously for a total of one minute or longer, the product is vulnerable to damage. If there is any
danger of the load being shorted or excessive current being produced, always use a protective device such as a
fuse. The fuse should have a fusion current of 0.5A.
(3) Capacitor for output voltage smoothing
This capacitor should have a low ESR. Capacitors designed for low-impedance switching power supplies are
especially suitable. The ESR of the capacitor affects the
output ripple voltage. Please refer to the table below for
the names of products made by various manufacturers.
(4) Regulations governing electrical products
As a stand-alone product, this product is not subject to
regulations governing electrical appliances. Please be
aware, therefore, that applications must be submitted for
sets and not for individual products.
(5) Insulation
This product is not insulated on the primary and secondary sides, and there is a danger of electrical shock if it is
(6) Connections with other devices
Devices using this product should not be connected to
other devices. If connected, insulation should be provided.
Regulator ICs
(7) Pin noise voltage
The test circuit below (Figure 6) was used in the test whose results are shown in Figure 5.
Regulator ICs
Electrical characteristic curves
External dimensions (Units: mm)