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PDF BM2P163W Data sheet ( Hoja de datos )
| Número de pieza | BM2P163W | |
| Descripción | PWM type DC/DC converter IC | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
AC/DC Convertor IC
PWM type DC/DC converter IC
Integrated Switching MOSFET for non-Isolated type
BM2P161W/BM2P163W
General
The PWM type DC/DC converter series for AC/DC
provides an optimum system for all products that
include an electrical outlet. It enables simpler design of
a high effective converter specializing in non-isolated
devices.
This series has a built-in HV starter circuit that
tolerates 650V, and it contributes to low power
consumption. With a current detection resistor as
internal device, it can be designed as small power
supply. 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 fixed to 65 kHz. At light
load, the switching frequency is reduced and high
efficiency is achieved. A frequency hopping function is
also on chip, and it contributes to low EMI. In addition,
a built-in super junction MOSFET which tolerates 650V
makes the design easy.
Features
PWM frequency: 65kHz
PWM current mode method
Frequency hopping function
Burst operation at light load
Frequency reduction function
Built-in 650V start circuit
Built-in 650V switching MOSFET
VCC pin under voltage protection
VCC pin over voltage protection
Over current limiter function per cycle
Soft start function
Basic Specification
■Power Supply Voltage Operation Range:
VCC:
8.00V to 18.16V
DRAIN:
to 650V
■Normal Operation Current
BM2P161W 1.50mA (Typ.)
BM2P163W 1.20mA (Typ.)
■Burst Operation Current
0.35mA(Typ.)
■Oscillation Frequency
■Operation Temperature Range
65kHz(Typ.)
- 40 oC to +105 oC
■MOSFET ON resistor:
BM2P161W 1.9Ω (Typ.)
BM2P163W 3.0Ω (Typ.)
Package
DIP7K: 9.20mm×6.35mm×4.30mm pitch 2.54mm
(Typ.) (Typ.) (Max.)
(Typ.)
Application
Households such as LED lights, air conditioners, and
cleaners, etc.).
Application circuit
○Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has no designed protection against radioactive rays
1/19
TSZ02201-0F1F0A200220-1-1
11.July.2016.Rev.001
1 page  
BM2P161W/BM2P163W
Datasheet
Description of Blocks
(1)Back converter
This is the IC for exclusive use of non-isolated type back converter.
<Basic operation of back converter>
(1-1) when the MOSFET for switching is ON
When the MOSFET turns ON, current IL flows to coil L and energy is stored. At this moment, the voltage of GND_IC
becomes the voltage near DRAIN pin, and the diode D1 is OFF.
IL ＝ (VIN-VOUT) / L * Ton
D2
AC
Input
Filter
5
VCC
4
GND_IC 3
ON
6 DRAIN
7
DRAIN
2
1
Curent
D1
L
IL
VOUT
Figure 1. Back converter operation (MOSFET=ON)
GND
(1-2) when the MOSFET for switching is OFF
When the MOSFET turns OFF, the energy stored in coil is output via diode. At the moment, the MOSFET is OFF.
IL ＝ (VOUT) / L * Toff
D2
AC
Input
Filter
5
VCC
4
GND_IC 3
OFF
6 DRAIN
7
DRAIN
2 Curent
1
L
IL
D1
VOUT
Figure 2. Back converter operation (MOSFET=OFF)
GND
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/19
TSZ02201-0F1F0A200220-1-1
11.July.2016.Rev.001
5 Page 
BM2P161W/BM2P163W
Datasheet
This IC has a few external parts by fixing the VCC voltage and it enables simpler design. If you adjust the output
voltage which is out of lineup, it can become the variable voltage by adding zener diodes. However it is necessary to
consider the dispersion of the diodes.
The output voltage VOUT is defined by the formula below. The voltage when the MOSFET is OFF is shown in Figure
10.
VOUT = VCNT ＋ VFD2 – VFD1 ＋ VZD1
VFD1: Forward voltage of diode D1
VFD2: Forward voltage of diode D2
VZD1: Zener diode ZD1 voltage
Figure 10. Back converter output dispersion circuit (MOSFET is OFF)
(6-2) Frequency reduction circuit
mode1: burst operation
mode2: frequency reduction operation (It reduces the frequency)
mode3: fixed frequency operation (It operates in max frequency)
mode4: over load operation (pulse operation is stopped and burst operation is started.)
Figure 11. State transition of switching frequency
(6-3) Frequency hopping function
Frequency hopping function achieves low EMI by change the frequency at random. The wave width of frequency’s
upper limit is +-6% for basic frequency,
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/19
TSZ02201-0F1F0A200220-1-1
11.July.2016.Rev.001
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet BM2P163W.PDF ] | |
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