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PDF ( 数据手册 , 数据表 ) BM1051F

零件编号 BM1051F
描述 Quasi-Resonant Control DC/DC converter and Power Factor Correction converter IC
制造商 ROHM Semiconductor
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BM1051F 数据手册, 描述, 功能
Datasheet
Quasi-Resonant Control DC/DC
converter and Power Factor Correction
converter IC for AC/DC Converter
BM1051F
General Description
BM1051F is compounded LSI of Power Factor Correction
converter (PFC) for harmonic solution and DC/DC converter
(DC/DC). Because DC/DC operates on Quasi-resonant
method, DC/DC contributes to Low EMI.
BM1051F built in a HV starter circuit that tolerates 650V.
Because of putting the current sense resistors externally
both the PFC part and the DC/DC part, IC enables power
supply design free.
In the PFC part, IC adopts peak current control operation.
Suitable application is proposed by a various protection
circuit, such as the multiplier with a revision circuit on the AC
voltage falls, the load regulation revision circuit, and the
maximum power feed-forward circuit, etc.
The Quasi-resonant system of a DC/DC part contributes to
low EMI because PFC operates by soft switching.
A burst mode is built in, so the power is reduced at light load.
Various protection functions, such as a soft start function, a
burst function, an over-current limiting for every cycle,
overvoltage protection, and over current protection, are built
in. The pin for communicated control with a controller and the
external stop pin are prepared; it proposes the system that
can be adapted for various applications.
Basic specifications
Operating Power Supply Voltage Range:
VCC8.0 to 24.0V
Operating Current:
QR ON (PFC OFF)1.20mA(pulse on)
QR ON (PFC OFF)1.00mA(pulse off)
QR ON (PFC ON)1.80mA(pulse on)
Oscillation Frequency QR part :120kHz(FB=2.0V typ)
Operating Temperature: -40to +85
Typical Application Circuit(s)
+
AC
85-265Vac
-
FUSE
Filter
Diode
Bridge
P_OUT
P_CS
P_VS
VCC
QR_ZT
BD9212F
4Ch LEDドライバ
FET内蔵
DCDC 無し
DCD C
BD92XX
DC/DC
音声
QR_ZT QR_FB QR_CS
BM1051
VCC QR_CS
マイコン
P_VS
P_CS
P_OUT
QR_FB
Features
Quasi-resonant circuit + PFC circuit
Built-in HV Starter circuit
Low consumption current (typ.10uA) when starter
circuit is OFF.
Quasi resonant circuit
Max operating frequency(120kHz)
Frequency reduction function
Over-current limiting variable function
Pulse-by-pulse over-current protection circuit
Built-in Soft start
Voltage protection function (brown out) during low
input
ZT pin Over Voltage Protection
Output overload protection (auto recovery /latch
switching enabled)
250nsec Leading-Edge Blanking
Power Factor Correction circuit
Peak current control (65kHz)
Per-cycle over current protection circuit
Maximum power revision
the multiplier with a revision circuit when the AC
voltage falls
the load change measure circuit
Selectable protection method by LATCH/AUTOR
terminal.
LATCH/AUTOR=H : Latch
LATCH/AUTOR=L : Auto recovery
External stop function (COMP pin)
AC input voltage stop detected function (ACDET)
Built-in PFC stop terminal (PFCON/OFF)
Package(s)
SOP24 15.0mm×5.40mm ×1.80mm pitch1.27mm
(Typ.) (Typ.) (TYP.) TYP.
Applications
TV, AC adapters, printers, LED lighting
Figure 1. Application circuit
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed for protection against radioactive rays
1/47
TSZ02201-0F1F0A200020-1-2
10.Apr.2015 Rev.002







BM1051F pdf, 数据表
BM1051F
PIN Configure
Table 1. I/O Pin Functions
NO PIN
I/O
Function
1 P_BO
I Input AC Voltage monitor pin
2 P_VSEO
I/O PFC gm amplifier output pin
3 P_VS
I PFC Output voltage monitor pin
4 P_BOPK
O Connected capacitor to the pin
5 P_CS
I PFC Coil current monitor pin
6 PFCON/OFF
I PFC ON/OFF control input pin
7 COMP
I External latch stop pin
8 ACDET
O Input AC voltage state communication pin
9 ACTIMER
I Brown out detection time setting input pin
10 GND
I/O GND
11 P_OUT
O PFC Output drive pin
12 GCLAMP
I/O Gate H level clamp pin
13 VCC
I/O Power supply pin
14 QR_OUT
O Quasi-resonant Output drive pin
15 QR_SEL
O Quasi-resonant Mask pin
16 GND
I/O GND
17 QR_CS
I Quasi-resonant Over current detected pin
18 QR_FB
I Quasi-resonant Feedback detected pin
19 QR_ZT
I Quasi-resonant Zero cross detected pin
20 LATCH/AUTOR I Protection mode switched input pin
21 VREF
O Internal power supply pin
22 -
--
23 -
--
24 VH_IN
I AC Input voltage applied pin
Datasheet
ESD protection system
VCC
GND
○○
○○
○○
○○
○○
○○
○○
○○
○○
-
○○
○○
-
○○
-
-
○○
○○
-
○○
○○
--
--
-
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
8/47
TSZ02201-0F1F0A200020-1-2
10.Apr.2015 Rev.002







BM1051F equivalent, schematic
BM1051F
Datasheet
(3) VCC protection function and VREF pin function
(3-1) VCC pin protection function(13pin)
BM1051F built in VCC low voltage protection function of VCCUVLO (Under Voltage Lock Out) and over voltage protection
function of VCC OVP (Over Voltage Protection).
This function monitors VCC pin and prevent VCC pin from destroying switching MOSFET at abnormal voltage.
VCCUVLO is auto recovery comparator that has voltage hysteresis. VCCOVP operates as latch mode comparator in the
LATCH/AUTOR=H and as auto return comparator in the LATCH/AUTOR=L.
VCC<VLATCHOFF (typ = Vuvlo1 - 0.5) is condition of latch release (reset) after detection of latch operation by VCCOVP.
Refer to the operation figure10.
VCCOVP built in mask time TCOMP (typ=150us), in case of continuing VCCOVP 150us, operates over voltage detection.
By this function, this IC masks pin generated surge etc.
(Note) When the latch mode is used, it is necessary to apply 3.5V~4.5V to VREF terminal from the outside.
Figure10. VCC UVLO / OVP (LATCH/AUTOR=H at Latch stop)
A:VH input, VCC voltage rise
B:VCC>Vuvlo1,DC/DC operation start
C:VCC<Vuvlo2,DC/DC operation stop
D:VCC>Vuvlo1,DC/DC operation start
E:VCC voltage decreases until starting DC/DC switching
F:VCC rise
F:When VCC>Vovp1,DC/DC operation is stopped. Switching is stopped by internal latch signal.
G:Then DC/DC operation is stopped, power supply is lost from auxiliary, VCC voltage downs.
H:VCC<Vuvlo2, VCC voltage rises for dropping IC's consumption current.
I:VCC>Vuvlo1, this IC dose not operate DC/DC for latch operation. VCC voltage drops because of dropping of IC's consumption
current.
J:same of H
K:same of I
L:same of J
M:VH is open(the state is outlet out).VCC drops.
N:VCC <VCOMP, latch releases.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
16/47
TSZ02201-0F1F0A200020-1-2
10.Apr.2015 Rev.002










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