BM1C101F Datasheet, PDF (1/40 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
BM1C101F
General Description
The compounded LSI of the Power Factor Correction (PFC)
converter and Quasi-Resonant (QR) controller type DC/DC
converter IC provides an optimum system for all products that
include an electrical outlet. BM1C101F has a built-in HV
starter circuit that tolerates 650V and X-Cap discharge
function, and contributes to low power consumption and high
speed start.
The PFC part operates by Boundary Conduction Mode
(BCM). It reduces the switching loss and the switching noise.
Because of zero current detection (ZCD) by a resistance, this
solution achieves no auxiliary winding and reduces external
parts and the bias current.
The DC/DC part operates by Quasi-Resonant Mode This
method 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 output
terminal, which protects electrolytic capacitor 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 switched function
■PFC ON/OFF 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, TV, Lighting, Household appliances (Vacuum
cleaners, Air cleaners, Air conditioners, IH cooking
heaters, Rice cookers, etc.).
Key Features
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 500V
1.2mA (Typ)
0.6mA (Typ)
External setting
120kHz (Typ)
-40°C to+105°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 conduction mode (voltage control)
■PFC Zero Cross Detection
■PFC variable max frequency
■PFC Dynamic & Static OVP function
Package W(Typ) x D(Typ) x H(Max)
SOP18 11.20mm × 7.80mm × 2.01mm pitch 1.27mm
SOP18
Typical Application Circuit
FUSE
AC
Filter
Diode
Bridge
P_IS
18
VH_IN
QR_OUT
17 16 15 14
(N.C.) P_TIMER QR_OUT P_OUT
P_VS _VCC
QR_ZT
SBD
QR_OUT
P_IS QR_CS P_VS
13 12 11
10 ^QR_CS
P_IS QR_CS P_VS P_OVP
B^BM^M1¹C^C1¹0ｘ^1FF
QR_FB
VCC GND QR_FB QR_ZT COMP P_EO BR P_RT P_OFFSET
12 34567 89
BR
VCC
QR_FB QR_ZT
BR
μ-
com
Figure 1. Application circuit
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has no designed protection against radioactive rays
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TSZ02201-0F1F0A200160-1-2
22.Mar.2016 Rev.002