Datasheet AC/DC Drivers Power Factor Correction and Quasi-Resonant DC/DC converter IC BM1C001F PFC Output level setting function General Description PFC ON/OFF level setting The compounded LSI of the Power Factor Correction (PFC) QR low power when load is light (Burst operation) and converter and Quasi-Resonant (QR) controller type AC/DC frequency decrease function converter IC provides an optimum system for all products that QR maximum frequency control (120kHz) include an electrical outlet. BM1C001F has a built in HV QR CS pin open protection and OCP function starter circuit that tolerates 650V and contributes to low power QR Over-Current Protection with AC compensation consumption and high speed start. QR Soft Start function The PFC part is a Boundary Conduction Mode (BCM). It QR secondary side protection circuit of over-current reduces the switching loss and the switching noise. This IC QR ZT pin 2 step timeout function and OVP function has adopted the voltage control mode, a solution that achieves no auxiliary winding and reduces external parts and the bias current. Applications The DC/DC part is Quasi-Resonant controlled. This control AC adapters and Household appliances (Printer, TV, enables soft switching and helps to keep the EMI low. With Vacuum cleaners, Air cleaners, Air conditioners, IH cooking MOSFET for switching and current detection resistors as heaters, Rice cookers, etc.). external devices, a higher degree of design freedom is achieved. Key Specifications This IC has over voltage protection for the PFCs output Operating Power Supply: VCC 8.9V to 26.0V terminal, which protects electrolytic capacitors by stopping Voltage Range: VH IN 80V to 600V switching and makes the standby power consumption low by Operating Current: Normal 1.2mA (Typ) the PFC ON/OFF control function. The IC includes various Burst 0.6mA (Typ) protective functions such as VCC over voltage protection, Max frequency: PFC 400kHz (Max) external latch protection, brown out protection, soft start QR 120kHz (Typ) function, per-cycle current limiter and over load protection. The range of temperature: -40C to +85C Features Package W(Typ) x D(Typ) x H(Max) PFC+QR Combo IC SOP18 11.20mm 7.80mm 2.01mm pitch 1.27mm 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) SOP18 PFC Dynamic & Static OVP function Typical Application Circuit 15.0V 5.0A FUSE AC Diode Filter P VS 85-265 Bridge VCC Vac QR ZT SBD P IS QR OUT Csw QR OUT P IS QR CS P VS QR CS ERROR 18 17 16 15 14 13 12 11 10 RS AMP VH IN (N.C.) P TIMERQR OUT P OUT P IS QR CS P VS P OVP QR FB PC BM1C001F VCC GND QR FB QR ZT COMP P EO BR P RT P OFFSET 1 2 3 4 5 6 7 8 9 BR CPU PC VCC QR FB QR ZT BR Figure 1. Application circuit Product structureSilicon monolithic integrated circuit This product has no designed protection against radioactive rays . www.rohm.com TSZ02201-0F1F0A200010-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/32 TSZ2211114 001 07.Mar.2014 Rev.003DatasheetDatasheet BM1C001F Pin Configuration Figure 2. Pin Layout (Top View) Pin Description Table 1. I/O Pin Functions ESD Diode Pin Name I/O Pin No. Function VCC GND VCC I/O 1 General Power supply pin - GND I/O 2 General GND pin - QR FB I 3 QR Feedback detection pin - QR ZT I 4 QR Zero cross detection pin - COMP I 5 General External latch input pin - P EO O 6 PFC Error amplifier output pin - BR I 7 General Input AC voltage monitor pin - P RT I 8 PFC Max frequency setting pin - P OFFSET I 9 PFC ON/OFF setting voltage - P OVP I 10 PFC Over voltage detection pin - P VS I 11 PFC Feedback signal input pin - QR CS I 12 QR Over-current detection pin - P IS I 13 PFC Zero cross detection pin - P OUT O 14 PFC External MOS drive pin QR OUT O 15 QR External MOS drive pin P TIMER I 16 PFC OFF time setting pin - N.C. - 17 - - - VH IN I 18 General Starter circuit pin - www.rohm.com TSZ02201-0F1F0A200010-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/32 TSZ2211115 001 07.Mar.2014 Rev.003