Datasheet Quasi-Resonant Control DC/DC converter and Power Factor Correction converter IC for AC/DC Converter BM1050AF-G General Description Features BM1050AF 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. BM1050AF 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 Moreover, the frequency hopping function is built in and it Output overload protection (auto recovery /latch contributes to low EMI. switching enabled) The Quasi-resonant system of a DC/DC part contributes to 250nsec Leading-Edge Blanking low EMI because PFC operates by soft switching. Power Factor Correction circuit A burst mode is built in, so the power is reduced at light load. Peak current control (65kHz) Various protection functions, such as a soft start function, a Frequency hopping function burst function, an over-current limiting for every cycle, Per-cycle over current protection circuit overvoltage protection, and over current protection, are built Maximum power revision in. The pin for communicated control with a controller and the the multiplier with a revision circuit when the AC external stop pin are prepared it proposes the system that voltage falls can be adapted for various applications. the load change measure circuit Selectable protection method by LATCH/AUTOR terminal. Basic specifications LATCH/AUTOR=H : Latch Operating Power Supply Voltage Range: LATCH/AUTOR=L : Auto recovery VCC8.5 to 24.0V External stop function (COMP pin) Operating Current: AC input voltage stop detected function (ACDET) QR ON (PFC OFF)1.20mA(pulse on) Built-in PFC stop terminal (PFCON/OFF) QR ON (PFC OFF)1.00mA(pulse off) QR ON (PFC ON)1.80mA(pulse on) Package(s) SOP24 15.0mm5.40mm 1.80mm pitch1.27mm Oscillation Frequency QR part :120kHz(FB=2.0V typ) (Typ.) (Typ.) (TYP.) TYP. Operating Temperature: -40 to +85 Typical Application Circuit(s) Applications TV, AC adapters, printers, LED lighting Figure 1. Application circuit Product structureSilicon monolithic integrated circuit This product is not designed for protection against radioactive rays . www.rohm.com TSZ02201-0F2F0A200140-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/47 10.Apr.2015 Rev.003 TSZ22111 14 001 DatasheetDatasheet BM1050AF-G 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 8.524.0 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 TSZ02201-0F2F0A200140-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/47 10.Apr.2015 Rev.003 TSZ22111 15 001