BM2P0391 Datasheet, PDF (1/22 Pages) Rohm – PWM type DC/DC converter IC Included 650V MOSFET

Datasheet
AC/DC Drivers
PWM type DC/DC converter IC
Included 650V MOSFET
BM2P0391
●General
The PWM type DC/DC converter BM2P0391 for
AC/DC provides an optimum system for all products
that include an electrical outlet.
BM2P0391 supports both isolated and non-isolated
devices, enabling simpler design of various types of
low-power electrical converters.
BM2P0391 built in a HV starter circuit that tolerates
650V, it contributes to low-power consumption.
With current detection resistors as external devices, a
higher degree of design freedom is achieved.
Switching frequency adopts fixed system. Since
current mode control is utilized, current is restricted in
each cycle and excellent performance is demonstrated
in bandwidth and transient response.
The switching frequency is 100 kHz. At light load, the
switching frequency is reduced and high efficiency is
achieved.
A frequency hopping function is also on chip, which
contributes to low EMI.
●Basic Specifications
Operating Power Supply Voltage Range :
VCC: 8.9V to 26.0V
DRAIN: to 650V
Operating Current : Normal Mode 1.000mA (Typ)
Burst Mode 0.400mA (Typ)
Oscillation Frequency :
Operating Temperature :
100kHz (Typ)
-40 ^oC to +105 ^oC
MOSFET ON Resistance :
2.4Ω (Typ)
●Application circuit
●Features
 PWM frequency : 100kHz
 PWM current mode method
 Frequency hopping function
 Burst operation when load is light
 Frequency reduction function
 Built-in 650V start circuit
 Built-in 650V switching MOSFET
 VCC pin under voltage protection
 VCC pin overvoltage protection
 SOURCE pin Open protection
 SOURCE pin Short protection
 SOURCE pin Leading-Edge-Blanking function
 Per-cycle over current protection circuit
 Soft start
 Secondary Over current protection circuit
 BR pin AC input low voltage protection
●Package
DIP7K: 9.20mm×6.35mm×4.30mm pitch 2.54mm
(Typ) (Typ) (Max)
(Typ)
●Applications
AC adapters, TV and household appliances (vacuum
cleaners, humidifiers, air cleaners, air conditioners, IH
cooking heaters, rice cookers, etc.)
+
FUSE
AC
85-265 Vac
-
Filter
Diode
Bridge
ERROR
BR
AMP
Figure 1. Application circuit
○Product structure : Silicon monolithic integrated circuit
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© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has no designed protection against radioactive rays
1/18
TSZ02201-0F1F0A200150-1-2
12.JULY.2016.Rev.001