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PDF BM1Q011FJ Data sheet ( Hoja de datos )
| Número de pieza | BM1Q011FJ | |
| Descripción | Quasi-Resonant Control type DC/DC Converter IC | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
AC/DC Drivers
Quasi-Resonant Control type
DC/DC Converter IC
BM1Q011FJ
●General Description
The quasi-resonant controller typed AC/DC converter IC
BM1Q011FJ provides an optimum system for all products
that include an electrical outlet. Quasi-resonant operation
enables soft switching and helps to keep EMI low.
With MOSFET for switching and current detection
resistors as external devices, a higher degree of design
freedom is achieved.
This IC built in HV starter circuit, it contributes to low
consumption power and high speed start.
Because the burst mode is built-in and IC consumption
current is low, stand-by power becomes very low.
Because BM1Q011FJ series built-in soft-start, burst mode,
over current limiter which is cycle-by-cycle, over load
protection, over voltage protection, CS Open Protection
and so on, BM1Q011FJ are highly safety.
●Key Specifications
Operating Power Supply Voltage Range:
: VCC：8.9V to 26.0V
VH：
to 600V
Operating Current:
Normal：0.60mA (Typ.)
Burst ： 0.35mA(Typ.)
Max frequency:
120kHz(Typ.)
Operate temperature range:
-40 to +85
●Features
Quasi-resonant method
Built-in 650V tolerate start circuit
Low power at the light load (burst operation)
Maximum frequency control (120kHz)
Frequency reduction function
AC voltage correction function
VCC pin : under voltage protection
VCC pin : over voltage protection
Over-current protection (cycle-by-cycle)
Output driver 12V clamp circuits
Soft start function
ZT trigger mask function
Over Load protection [Auto-restart]
CS pin open protection [Auto-restart]
●Package
SOP-J7S
6.00mm × 4.90mm × 1.65mm
(Typ.) (Typ.)
(Typ.)
●Typical Application Circuit
●Applications
Air conditioner, AC adapters, TV such as the products
which need the outlet.
Figure 1. Application Circuit
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed protection against radioactive rays
1/26
TSZ02201-0F1F0A200180-1-2
21.Jan.2016 Rev.001
1 page  
BM1Q011FJ
●Block Diagram
Datasheet
Figure 4. Block Diagram
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/26
TSZ02201-0F1F0A200180-1-2
21.Jan.2016 Rev.001
5 Page 
BM1Q011FJ
Datasheet
・Regarding capacitor value of VCC pin
For stable operation of the IC, please set the capacitor value to 1uF or higher of the VCC pin. When the VCC
capacitor terminal is too large, the response of the VCC pin to the Secondary output is slows down. Additionally,
if the degree of the transformer coupling is low, since a large surge occurs to the VCC pin, the IC may be
destroyed. In this case, it is necessary that a resistor which is from 10Ω to 100Ω is attached to the path between
the capacitor and diode at the back of the auxiliary winding or the capacitor of the VCC pin is increased. And the
fixed number is has to be set the VCC pin surge voltage not to exceed the absolute maximum rating of the VCC
pin by evaluating the waveform of the VCC pin.
・Regarding VCC OVP voltage protection setting method in case of rising Vout (secondary output)
The VCC pin voltage is determined by the transformer ratio (Np:Ns) and Vout (Secondary output). Therefore,
when the Secondary output becomes large, it is possible to protect the IC by VCCOVP. Setting method of
VCCOVP protection is shown below.
Vout
Np Ns
Nb
Figure 12. How to Set VCCOVP
The VCC voltage is determined by the formula below.
VCC voltage = (Vout-VFs)×Nb/Ns -VFb
(Vout: Secondary output, Nb: Number of auxiliary winding, Ns: Number of secondary winding
VFx: Secondary diode VF, VFb: auxiliary winding diode VF)
If you want to apply protection when it becomes Secondary output × 1.3, please set the number of turns to be the next
formula. 1.3 × (Vout × (Nb/Ns) - VF) > VOVP1
Because VCCOVP protection has a blanking time of TSTOP (typ = 100us), it is not detected for momentary surge noise
of the VCC pin. However, VCCOVP is detected when the VCC voltage becomes higher than VOVP1 for the period of
more than VSTOP. So it is necessary to check in application evaluation when you set VCCOVP.
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/26
TSZ02201-0F1F0A200180-1-2
21.Jan.2016 Rev.001
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet BM1Q011FJ.PDF ] | |
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