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BM1051F Schematic ( PDF Datasheet ) - ROHM Semiconductor

Teilenummer BM1051F
Beschreibung Quasi-Resonant Control DC/DC converter and Power Factor Correction converter IC
Hersteller ROHM Semiconductor
Logo ROHM Semiconductor Logo 




Gesamt 30 Seiten
BM1051F Datasheet, Funktion
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 Datasheet, Funktion
BM1051F
Electrical Characteristics (Unless otherwise noted Ta=25, VH_IN=320Vdc, VCC=12V)
Parameter
Symbol
Specifications
Minimum Standard Maximum
Unit
[Power Factor CorrectionPFCcontroller block]
[Power Factor Correction (PFC) Gm amplifier block]
P_VS pin pull-up current
Gm amplifier normal voltage
Gm amplifier
trans-conductance
Maximum Gm amplifier
source current
Maximum Gm amplifier
sink current
IP_VS
VVSAMP
VVSGM
IVSAMP1
IVSAMP2
-
2.460
30.8
15
24
0.50
2.500
44.0
25
40
[Power Factor Correction (PFC) input voltage monitor block]
P_BO input voltage range
P_BO pin leak current
VP_BOIN
IBOLEAK
0.000
-1.00
-
0.00
[Power Factor Correction (PFC) input voltage peak detect block]
P_BOPK max charge current
P_BOPK max
discharge current
IBOPKCHG
IBOPKDIS
36
0.1
72
0.2
[Power Factor Correction (PFC) multiplier block]
Multiplier constant
P_VSEO stop voltage 1
P_VSEO stop voltage 2
KMULTI
VVSEO1
VVSEO2
0.37
181
88
0.54
226
128
[Power Factor Correction (PFC) Oscillation frequency block]
PFC Oscillation frequency
Minimum Pulse width
Maximum DUTY
FPSW1
Tmin
Dmax
60
-
90.0
[Power Factor Correction (PFC) Driver block]
65
500
94.0
P_OUT pin PMOS ON resistor
P_OUT pin NMOS ON resistor
RPPOUT
RPNOUT
5
2
15
5
-
2.540
57.2
35
56
1.800
1.00
144
0.4
0.71
271
168
70
-
98.0
30
10
uA
V
uS
uA
uA
V
uA
uA
uA
mV
mV
KHz
ns
%
Datasheet
Conditions
P_VS=1.0V
P_VS=3.5V
BOPK=0.56V
BOPK=1.30V
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
6/47
TSZ02201-0F1F0A200020-1-2
10.Apr.2015 Rev.002

6 Page









BM1051F pdf, datenblatt
BM1051F
Datasheet
Explanation of each block
(1) Starter block (24pin)
BM1051F built in the starter circuit that withstands 650V. For that, application used the IC is enabled faster start time and
low standby power. After start-up, consumption power is idling current ISTART3typ=10uAonly.
Reference of start-up time is shown in Figure 4.
It can start-up less than 0.1sec when Cvcc=10uF.
Figure 4. Start Circuit Block Diagram
Figure 5. Start-up current vs VCC voltage
1.0 
0.9 
0.8 
0.7 
0.6 
0.5 
0.4 
0.3 
0.2 
0.1 
0.0 
0
5 10 15 20 25 30 35 40 45 50
Cvcc  [uF]
Figure 6. Start time vs Cvcc (Reference values
*Start current flows from VH_IN pin to VCC pin.
ex) When Vac=100V; consumption power of start-up circuit only.
PVH100V*2*10uA=1.41mW
ex) When Vac=240V; consumption power of start-up circuit only.
PVH240V*2*10uA=3.38mW
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
12/47
TSZ02201-0F1F0A200020-1-2
10.Apr.2015 Rev.002

12 Page





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