BM1C001F Datasheet, PDF (1/35 Pages) Rohm – Power Factor Correction and Quasi-Resonant DC/DC converter IC

Datasheet
AC/DC Drivers
Power Factor Correction and
Quasi-Resonant DC/DC converter IC
BM1C001F
General Description
The compounded LSI of the Power Factor Correction (PFC)
converter and Quasi-Resonant (QR) controller type AC/DC
converter IC provides an optimum system for all products that
include an electrical outlet. BM1C001F has a built in HV
starter circuit that tolerates 650V and contributes to low power
consumption and high speed start.
The PFC part is a Boundary Conduction Mode (BCM). It
reduces the switching loss and the switching noise. This IC
has adopted the voltage control mode, a solution that
achieves no auxiliary winding and reduces external parts and
the bias current.
The DC/DC part is Quasi-Resonant controlled. This control
enables soft switching and helps to keep the EMI low. With
MOSFET for switching and current detection resistors as
external devices, a higher degree of design freedom is
achieved.
This IC has over voltage protection for the PFC’s output
terminal, which protects electrolytic capacitors by stopping
switching and makes the standby power consumption low by
the PFC ON/OFF control function. The IC includes various
protective functions such as VCC over voltage protection,
external latch protection, brown out protection, soft start
function, per-cycle current limiter and over load protection.
„ PFC Output level setting function
„ PFC ON/OFF level setting
„ QR low power when load is light (Burst operation) and
frequency decrease function
„ QR maximum frequency control (120kHz)
„ QR_CS pin open protection and OCP function
„ QR Over-Current Protection with AC compensation
„ QR Soft Start function
„ QR secondary side protection circuit of over-current
„ QR_ZT pin 2 step timeout function and OVP function
Applications
AC adapters and Household appliances (Printer, TV,
Vacuum cleaners, Air cleaners, Air conditioners, IH cooking
heaters, Rice cookers, etc.).
Key Specifications
Operating Power Supply:
Voltage Range:
Operating Current:
Max frequency:
The range of temperature:
VCC
VH_IN
Normal
Burst
PFC
QR
8.9V to 26.0V
80V to 600V
1.2mA (Typ)
0.6mA (Typ)
400kHz (Max)
120kHz (Typ)
-40°C to +85°C
Features
„ PFC+QR Combo IC
„ Built-in 650V tolerance start circuit
„ VCC pin: under and over voltage protection
„ Brown out function
„ External latch terminal function
„ PFC boundary current mode (voltage control)
„ PFC Zero Cross Detection
„ PFC variable max frequency (up to 400kHz)
„ PFC Dynamic & Static OVP function
Package W(Typ) x D(Typ) x H(Max)
SOP18 11.20mm × 7.80mm × 2.01mmç pitch 1.27mm
SOP18
Typical Application Circuit
AC
85-265
Vac
FUSE
Filter
Diode
Bridge
P_IS
18
VH_IN
QR_OUT
17 16 15 14
(N.C.) P_TIMERQR_OUT P_OUT
P_VS _VCC
QR_ZT
SBD
P_IS
13
P_IS
QR_CS
12
QR_CS
P_VS
11
P_VS
QR_OUT
10
P_OVP
Csw
QR_CS
RS
BM1C001F
QR_FB
PC
15.0V 5.0A
ERROR
AMP
VCC GND QR_FB QR_ZT COMP P_EO BR P_RT P_OFFSET
1
2
3
4
5
6
7
8
9
BR
VCC
QR_FB QR_ZT
BR
PC
CPU
Figure 1. Application circuit
˓Product structureɿSilicon monolithic integrated circuitç ˓This product has no designed protection against radioactive rays
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TSZ02201-0F1F0A200010-1-2
29.Aug.2013 Rev.002