UBA2015P主要特性和優(yōu)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(yīng)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(biāo):


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):


NXP公司的UBA2015P是能驅(qū)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(qū)動器,內(nèi)置的臨界導(dǎo)通模式PFC控制器/驅(qū)動器以及多種保護機制.電源電壓高達600V,可調(diào)整預(yù)熱時間和預(yù)熱電流以及點火失效檢測,主要用在熒光燈照明電源.UBA2015P主要特性和優(yōu)勢, UBA2015P評估板指標(biāo),方框圖,電路圖和材料清單.