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PDF ( 数据手册 , 数据表 ) BM1Q002FJ

零件编号 BM1Q002FJ
描述 DC/DC Converter IC
制造商 ROHM Semiconductor
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BM1Q002FJ 数据手册, 描述, 功能
Datasheet
AC/DC Drivers
Quasi-Resonant Control type
DC/DC Converter IC
BM1Q00XFJ Series
General Description
The quasi-resonant controller typed AC/DC converter IC
(BM1Q00XFJ series) 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.
As BM1Q00XFJ series built in HV starter circuit, it
contributes to low consumption power and high speed start.
Because the built-in burst mode is reduced switching loss
and IC consumption current is low, Stand-by power is very
low.
Because BM1Q00XFJ 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, BM1Q00XFJ series are highly safety.
Key Specifications
Operating Power Supply Voltage Range:
: VCC8.9V to 26.0V
VH
to 600V
Operating Current:
Normal0.60mA (Typ.)
Burst 0.35mA(Typ.)
Max frequency:
120kHz(Typ.)
Operate temperature range:
-40to +85
Features
Quasi-resonant method
Built-in 650V tolerate start circuit
Low power when load is light ( Burst operation)
Maximum frequency control (120kHz)
Frequency reduction function
AC voltage correction function
VCC pin : under voltage protection
VCC pin : overvoltage protection
Over-current protection (cycle-by-cycle)
OUT pin : H voltage 12V clamp
Soft start
ZT trigger mask function
ZT Over voltage protection
FB Over Load protection [Auto-restart]
CS pin open protection [Auto-restart]
Package
SOP-J8
4.90mm × 3.90mm × 1.65mm
(Typ.) (Typ.)
(Typ.)
Typical Application Circuit
Applications
AC adapters and household appliances (printer, TV,
vacuum cleaners, air cleaners, air conditioners, IH
cooking heaters etc.)
Line Up
IC
BM1Q001FJ
BM1Q002FJ
VCC OVP
Auto restart
Latch
ZT OVP
None
Latch
Fig 1. Application Circuit
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed protection against radioactive rays
1/25
TSZ02201-0F2F0A200110-1-2
17.JUN.2015 Rev.003







BM1Q002FJ pdf, 数据表
BM1Q00XFJ Series
Datasheet
( 1-2 ) In Case of Useless VH pin (8pin)
This IC is also possible to start by connecting the start-up resistor to the VCC pin in the open the start-up circuit (650V
breakdown voltage) of the VH pin. The structure that do not use the recharge function is shown in Fig- 9.
At start-up (before VCC VULO releasing) , please be careful to set the start-up resistor shown in blue because the
consumption current IOFFMax=25uAflows from VCC pin(6pin). Also, in case of not to use recharge function, the same
circuit is used.
Fig-9 Application Circuit not to use VH Pin (8pin)
How to set the start-up resistance
Start-up resistor Rstart shown in Fig-9 in blue, is necessary for the IC to start if you do not use the VH pin.
If you reduce Rstart value, standby power is increased, start-up time is shorter.
If you increase Rstart on the contrary, standby power is reduced, start-up time will be longer.
When the voltage VCC=12V, standby current IOFF is 25μA (max), VCC UVLO voltage VUVLO1 is 14.5V (max).
exThe example of start-up resistor Rstart setting
Rstart = (Vmin- VUVLO1max) / IOFFmax
In Vac=100V, if margin is -30% , VHmin=100×2×0.7=99V
VUVLO1max=14.5V ,so
Rstart (99-14.5) / 25μA3.38M
For an example, with a sufficient margin to 3.38M, and the Rstart is 2.0M..
For AC100V, Power consumption in Rstart is below.
Pd (Rstart) = (VH-VCC)2/Rstart = (141V-14.5V) 2/2.0M = 8.00mW
Pd in using start-up resistor is more than in using VH pin,
However for VCC pin capacitance value and VCC start-up resistor, please confirm by performing the evaluation of the actual
application.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
8/25
TSZ02201-0F2F0A200110-1-2
17.JUN.2015 Rev.003







BM1Q002FJ equivalent, schematic
BM1Q00XFJ Series
Datasheet
(4-4) CS Over Current Protection Switching Function
When input voltageVHis higher, ON time is short, and the operating frequency increases. As a result, maximum capable
power increases for constant over current limiter. For that, monitoring input voltage (VH), IC switches over current detection of
IC.
In case of high voltageAC230V, IC changes over current comparator level to ×0.7 multiple of normal level.
The detection method is that IC monitors ZT input current, then, IC switches it.
When MOSFET turns on, the voltage of “Va” has negative voltage to be affected input voltage (VH.
Then, ZT (1pin) voltage is clamped near 0V by IC, ZT pin flows current to bias coil.
The calculation is below. And show block figure to Fig-18, show graph to Fig-19, Fig-20.
Izt = (VaVzt/Rz1 Va/Rz1 VH * Na/Np /Rz1
Rzt1 Va/Izt
Please set ZT current” Izt” to select the resistor Rzt1. And set bottom detection timing to select Czt.
About ZT current, IC builds in ZT current hysteresis IZTHYS(typ=0.1mA) to prevent VH detection changing by input voltage.
Fig-18 CS Over Current Detection Switched ZT current block diagram
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
16/25
TSZ02201-0F2F0A200110-1-2
17.JUN.2015 Rev.003










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