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PDF BM1051F Data sheet ( Hoja de datos )
| Número de pieza | BM1051F | |
| Descripción | Quasi-Resonant Control DC/DC converter and Power Factor Correction converter IC | |
| Fabricantes | ROHM Semiconductor | |
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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:
VCC：8.0 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: -40℃ to +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 structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed for protection against radioactive rays
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TSZ02201-0F1F0A200020-1-2
10.Apr.2015 Rev.002
1 page  
BM1051F
Datasheet
●Electrical Characteristics (Unless otherwise noted Ta=25, VH_IN=320Vdc, VCC=12V)
Parameter
Symbol
Specifications
Minimum Standard Maximum
Unit
[Quasi-resonant Control Block]
[Quasi-resonant DC/DC converter Block (turn off)]
QR_FB pin pull-up resistance
CS over-current
detect voltage 1A
RFB
Vlim1A
15
0.950
20
1.000
CS over-current
detect voltage 1B
Vlim1B
0.630
0.700
CS over-current
detect voltage 1C
Vlim1C - 0.250
CS over-current
detect voltage 1D
Vlim1D
-
CS over-current
detect voltage 2A
CS switched ZT current
CS Leading
Edge Blanking time
Turn off time
Minimum ON width
Vlim2A
IZT
TLEB
TOFF
Tmin
-
0.800
-
-
-
[Quasi-resonant DC/DC converter Block (turn on)]
Maximum operating
frequency 1
Maximum operating
frequency 2
Frequency reduction
start FB voltage
Frequency reduction
end FB voltage
FSW1
FSW2
VFBSW1
VFBSW2
106
24
1.15
0.35
0.750
0.150
1.000
0.250
0.250
0.500
120
30
1.250
0.50
Voltage gain
AVCS
1.70
2.00
ZT comparator voltage 1
VZT1 60 100
ZT comparator voltage 2
VZT2 300 400
ZT trigger timeout period
TZTOUT
-
15
[Quasi-resonant DC/DC converter protection functions]
Soft start time1
Soft start time2
FB OLP Voltage 1a
FB OLP Voltage 1b
TSS1
TSS2
VFOLP1A
VFOLP1B
0.60
2.60
2.5
-
1.00
4.00
2.8
2.6
FB OLP Voltage 2a
VFOLP2A
3.3
3.6
FB OLP Voltage 2b
VFOLP2B
-
3.4
FB OLP mode switched
external connected resistor
FB OLP timer
ZT OVP Voltage
[QR_OUT pin]
QR_OUT pin
PMOS ON resistor
QR_OUT pin
NMOS ON resistor
[QR_SEL pin]
QR_SEL pin Ron
*1 Pulse is applied to QR_CS pin
*2 Pulse is applied to QR_ZT pin
RFOLP2
TFOLP
VZTL
RPOUT
RNOUT
RMASK
90
44
3.2
5
2
-
100
64
3.5
15
5
150
25
1.050
0.770
-
-
-
1.200
-
-
-
134
36
1.350
0.65
2.30
140
500
-
1.40
5.40
3.1
-
3.9
-
110
84
3.8
30
10
-
kΩ
V
V
V
V
V
mA
us
us
us
KHz
KHz
V
V
V/V
mV
mV
us
ms
ms
V
V
V
V
kΩ
ms
V
Ω
Ω
Ω
Conditions
Izt<1.0mA
Izt>1.0mA
Izt<1.0mA
Izt<1.0mA
QR_FB=0.3V (Izt<1.0mA)
*1
TLEB＋TOFF
QR_FB=2.00V
QR_FB=0.50V
⊿V (QR_FB)/⊿V
（QR_CS）
QR_ZT drop
QR_ZT rise
Count from final ZT trigger
Operate QR_FB rise
Operate QR_FB drop
Switched latch / Auto
recovery rise
Switched latch / Auto
recovery drop
QR_FB pin external
resistance value (during
latch mode)
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/47
TSZ02201-0F1F0A200020-1-2
10.Apr.2015 Rev.002
5 Page 
BM1051F
Datasheet
AND
+
-
+
-
+
-
Internal
Supply
-
+
AND
-
+
100k
AND
OR
GateClamp
0.5V
+
-
1/VBOPK
+
-
+
-
Internal CLK
65kHz
MIN ON
WIDTH
S
Q
+
-
*K2 × *K3
RAMP
+
-
-
+
MAX DUTY
94%
OR
R
AND
PRE
Driver
15Ω
+
- 1MΩ
5Ω
+
-
- *K1
+
Leading Edge
Blanking
(250ns)
+
-
3.50V
7V
20kΩ
+
-
100mV NOUT
/400mV
1.25V
+
+
-
0.50V
+
-
ZT Blanking
OUT(H->L) 0.60us
MAX Blanking
Frequency
(120kHz)
+
-
200kΩ
200kΩ
FB/2
1.00V
-
-
+
+
-
1 shot
AND OR
TimeOut
( 15 usec )
AND
OR
Timer
(64ms)
BURST_OH
FBOLP_OH
S
Q
R
AND
Soft
Start
SS1ms SS4ms
CURRENT SENSE (V-V Change)
Normal : ×1.0
STOP
PRE
Driver
POUT
15Ω
NOUT
5Ω
Leading Edge
Blanking
(250ns)
1MΩ
Figure 3-2. Block Diagram
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/47
TSZ02201-0F1F0A200020-1-2
10.Apr.2015 Rev.002
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BM1051F.PDF ] | |
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