Datasheet Quasi-Resonant Control DC/DC converter and Power Factor Correction converter IC for AC/DC Converter BM1051F General Description Features BM1051F is compounded LSI of Power Factor Correction Quasi-resonant circuit + PFC circuit converter (PFC) for harmonic solution and DC/DC converter Built-in HV Starter circuit (DC/DC). Because DC/DC operates on Quasi-resonant Low consumption current (typ.10uA) when starter method, DC/DC contributes to Low EMI. circuit is OFF. BM1051F built in a HV starter circuit that tolerates 650V. Quasi resonant circuit Because of putting the current sense resistors externally Max operating frequency(120kHz) both the PFC part and the DC/DC part, IC enables power Frequency reduction function supply design free. Over-current limiting variable function In the PFC part, IC adopts peak current control operation. Pulse-by-pulse over-current protection circuit Suitable application is proposed by a various protection Built-in Soft start circuit, such as the multiplier with a revision circuit on the AC Voltage protection function (brown out) during low voltage falls, the load regulation revision circuit, and the input maximum power feed-forward circuit, etc. ZT pin Over Voltage Protection The Quasi-resonant system of a DC/DC part contributes to Output overload protection (auto recovery /latch low EMI because PFC operates by soft switching. switching enabled) A burst mode is built in, so the power is reduced at light load. 250nsec Leading-Edge Blanking Various protection functions, such as a soft start function, a Power Factor Correction circuit burst function, an over-current limiting for every cycle, Peak current control (65kHz) overvoltage protection, and over current protection, are built Per-cycle over current protection circuit in. The pin for communicated control with a controller and the Maximum power revision external stop pin are prepared it proposes the system that the multiplier with a revision circuit when the AC can be adapted for various applications. voltage falls the load change measure circuit Basic specifications Selectable protection method by LATCH/AUTOR terminal. Operating Power Supply Voltage Range: LATCH/AUTOR=H : Latch VCC8.0 to 24.0V LATCH/AUTOR=L : Auto recovery Operating Current: External stop function (COMP pin) QR ON (PFC OFF)1.20mA(pulse on) AC input voltage stop detected function (ACDET) QR ON (PFC OFF)1.00mA(pulse off) Built-in PFC stop terminal (PFCON/OFF) QR ON (PFC ON)1.80mA(pulse on) Package(s) Oscillation Frequency QR part :120kHz(FB=2.0V typ) SOP24 15.0mm5.40mm 1.80mm pitch1.27mm Operating Temperature: -40 to +85 (Typ.) (Typ.) (TYP.) TYP. Typical Application Circuit(s) + FUSE AC Diode Filter Bridge P VS 85-265Vac - P OUT 4Ch LED FET BD9212F DCDC DCDC P CS BD92XX VCC QR ZT DC/DC Applications QR ZT QR FB QR CS VCC QR CS TV, AC adapters, printers, LED lighting BM1051 P OUT P CS QR FB P VS Figure 1. Application circuit Product structureSilicon monolithic integrated circuit This product is not designed for protection against radioactive rays . www.rohm.com TSZ02201-0F1F0A200020-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/47 30.Apr.2015 Rev.003 TSZ22111 14 001 DatasheetDatasheet BM1051F Absolute Maximum Ratings (Ta = 25) Parameter Symbol Rating Unit Conditions Maximum applied voltage 1 Vmax1 650 V VH IN Maximum applied voltage 2 Vmax2 30 V VCC, QR SEL P BO, P VSEO, P VS, P BOPK P CS,PFCON/OFF,COMP, Maximum applied voltage 3 Vmax3 5.5 V ACDET, ACTIMER,QR CS, QR ZT, QR FB,LATCH/AUTOR, VREF Maximum applied voltage 4 Vmax4 15 V GCLAMP, P OUT, QR OUT output peak current 1 I -0.5 A QR OUT, P OUT OH output peak current 2 I 1.0 A QR OUT, P OUT OL QR ZT pin current 1 I -2.0 mA SZT1 QR ZT pin current 2 I 3.0 mA SZT2 Allowable dissipation Pd 687.6 (Note1) mW o Operating temperature range Topr -40 +85 C o Maximum junction temperature Tjmax 150 C o Storage temperature range Tstr -55 +150 C (Note1) When mounted (on 70 mm 70 mm, 1.6 mm thick, glass epoxy on single-layer substrate). Reduce to 5.5 mW/C when Ta = 25C or above. Operating Conditions (Ta = 25) Parameter Symbol Rating Unit Conditions Power supply voltage range 1 VCC 8.024.0 V VCC Power supply voltage range 2 VH IN 80600 V VH IN Power supply voltage range 3 P BO 0.01.8 V P BO www.rohm.com TSZ02201-0F1F0A200020-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/47 30.Apr.2015 Rev.003 TSZ22111 15 001