NXP’s UBA2016A/15/15A is a 600V fluorescent lamp driver with PFC, linear dimming and boost functions. The IC includes a fluorescent lamp control module, half-bridge driver, built-in critical conduction mode PFC controller/driver and various protection mechanisms , supply voltage up to 600V, and live wire voltage up to 390V. This article introduces the main features and advantages of UBA2016A/15/15A, block diagram, basic PFC application block diagram and various TL or CFL application circuits, reference design (230VAC) board specifications, block diagram, Circuit diagram, bill of materials, PCB layout and TL5 light connection circuit diagram.
UBA2016A/15/15A:600 V fluorescent lamp driver with PFC, linear dimming and boost function
The UBA2016A/15/15A are high voltage Integrated Circuits (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 UBA2016A/15/15A are 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.
Main features of UBA2016A/15/15A:
Power factor correction features:
Integrated 4-pin critical conduction mode PFC controller/driver
Open and short pin-short protection on PFC feedback pin
Half-bridge driver features:
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
Fluorescent lamp controller features:
Linear dimming (UBA2016A and UBA2015A only)
EOL (End-Of-Life) detection (both symmetrical and asymmetrical)
Adjustable preheat time
Adjustable preheat current
Adjustable fixed frequency preheat (UBA2015 and UBA2015A only)
Lamp ignition failure detection
Ignition detection of all lamps at multiple lamps with separate resonant tanks
Second ignition attempt if first failed
Constant output power independent of mains voltage variations
Automatic restart after changing lamps
Adjustable lamp current boost at start-up (UBA2016A only)
Lamp current control
Enable input (UBA2015 and UBA2015A only)
Hard switching/capacitive mode protection
Half-bridge overcurrent (coil saturation) protection
Lamp overvoltage (lamp removal) protection
Intended for fluorescent lamp ballasts with either a dimmable (UBA2016A and UBA2015A) or a fixed (UBA2015) output and PFC for AC mains voltages of up to 390 V.
Figure 1. UBA2016A block diagram
Figure 2. UBA2016A basic PFC application block diagram
Figure 3. UBA2016A Basic Half-Bridge and IC Power Connection Diagram
Figure 4. Application Circuit Diagram for TL or CFL Fluorescent Lamp Using UBA2016A (FireWire Filter Not Shown)
Figure 5. Application Circuit Diagram of TL or CFL Fluorescent Lamp Using UBA2016A (Better PFC Performance, FireWire Filter Not Shown)
Figure 6. Application Circuit Diagram for TL or CFL Fluorescent Lamp with Fixed Time Start Using UBA2016A (FireWire Filter Not Shown)
Figure 7. Application Circuit Diagram for L or CFL Fluorescent Lamp Using UBA2016A with Lamp Temperature Dependent Start T (Live Wire Filter Not Shown)
Figure 8. Application Circuit Diagram Using UBA2016A Dimmable TL Fluorescent Lamp (FireWire Filter Not Shown)
UBA2015P Reference Design (230VAC)
This document describes the specification and use of the UBA2015P board. This reference ballast design is intended to drive two TL5HE28W or 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.
Figure 9. UBA2015P Reference Design (230VAC) Board Outline Drawing
Reference Design (230VAC) Board Specifications:
Lamps supported by the reference design (230VAC) board:
The input section includes:
• The fuse
• Surge protection against fast AC transients
• ElectroMagnetic Interference (EMI) filter
• Full-wave rectifier
• Preconditioner or Power Factor Correction (PFC)
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.
Figure 10. UBA2015P Reference Design (230VAC) Board Block Diagram
Figure 11. Lamp Connection Circuit Diagram
Figure 12. UBA2015P Reference Design (230VAC) Board Circuit Diagram
UBA2015P Reference Design (230VAC) Board Bill of Materials (BOM):
Figure 13. UBA2015P Reference Design (230VAC) Board PCB Layout
For details, see: