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NXP公司的UBA2015P是能驅動管燈(TL)和緊湊型熒光燈(CFL)的高壓集成電路,包括熒光燈控制模塊,半橋驅動器,內置的臨界導通模式PFC控制器/驅動器以及多種保護機制.電源電壓高達600V,可調整預熱時間和預熱電流以及點火失效檢測,主要用在熒光燈照明電源.本文介紹了UBA2015P主要特性和優勢, UBA2015P評估板指標,方框圖,電路圖和材料清單. The UBA2015P is a high voltage Integrated Circuit (IC) intended to drive fluorescent lamps with filaments such as Tube Lamps (TL) and Compact Fluorescent Lamps (CFL) in general lighting applications. The IC comprises a fluorescent lamp control module, half-bridge driver, built-in critical conduction mode Power Factor Correction (PFC) controller/driver and several protection mechanisms. The IC drives fluorescent lamp(s) using a half-bridge circuit made of two MOSFETs with a supply voltage of up to 600 V. The UBA2015P is designed to be supplied by a start-up bleeder resistor and a dV/dt supply from the half-bridge circuit, or any other auxiliary supply derived from the half-bridge or the PFC. The supply current of the IC is low. An internal clamp limits the supply voltage. UBA2015P主要特性和優勢: Integrated 4-pin critical conduction mode PFC controller/driver Open and short pin-short protection on PFC feedback pin Overcurrent protection Overvoltage protection Integrated level-shifter for the high-side driver of the half-bridge Integrated bootstrap diode for the high-side driver supply of the half-bridge Independent non-overlap time EOL (End-Of-Life) detection (both symmetrical and asymmetrical) Adjustable preheat time Adjustable preheat current Lamp ignition failure detection Ignition detection of all lamps fat multiple lamps with separate resonant tanks Adjustable fixed frequency preheat Second ignition attempt if first failed Constant output power independent of mains voltage variations Automatic restart after changing lamps Lamp current control Hard switching/capacitive mode protection Lamp overvoltage (lamp removal) protection Temperature protection UBA2015P 應用: Intended for fluorescent lamp ballasts with a fixed output PFC for AC mains voltages of up to 390 V UBA2015P評估板 This document describes the specification and use of the UBA2015P board. This reference ballast design is intended to drive two TL5HE35W lamps. The board needs to be connected to the mains voltage. Touching the board while it is connected to the mains voltage must be avoided at all times. An isolated housing is obligatory when used in uncontrolled, non laboratory environments. Galvanic isolation of the mains phase using a variable transformer is always recommended. The output of the PFC connects to a electrolytic buffer capacitor to supply the half-bridge circuit. The lamp connects to the half-bridge circuit. The UBA2015P controller IC controls the PFC and the half-bridge circuit. The PFC is implemented as an up converter in boundary conduction mode. The resonant circuit is voltage fed by the half-bridge which consists of two N-channel MOSFETs. The resonant circuit includes a transformer for electrode (pre)heating. This type of topology with inductive heating is used in many commercial ballasts whose power exceeds 25 W, making it a cost-effective application. The lamps are connected in parallel. 
圖1.UBA2015P評估板外形圖 UBA2015P評估板指標:
圖2.UBA2015P評估板方框圖
圖3.UBA2015P評估板電路圖 UBA2015P評估板材料清單(BOM):
詳情請見: http://www.nxp.com/documents/user_manual/UM10466.pdf |
