UBA2015P主要特性和优势:

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 应用:

Intended for fluorescent lamp ballasts with a fixed output

PFC for AC mains voltages of up to 390 V

UBA2015P评估板

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.

图1.UBA2015P评估板外形图

UBA2015P评估板指标:


图2.UBA2015P评估板方框图

图3.UBA2015P评估板电路图

UBA2015P评估板材料清单(BOM):


NXP公司的UBA2015P是能驱动管灯(TL)和紧凑型荧光灯(CFL)的高压集成电路,包括荧光灯控制模块,半桥驱动器,内置的临界导通模式PFC控制器/驱动器以及多种保护机制.电源电压高达600V,可调整预热时间和预热电流以及点火失效检测,主要用在荧光灯照明电源.UBA2015P主要特性和优势, UBA2015P评估板指标,方框图,电路图和材料清单.