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PDF IRPLDIM2E Data sheet ( Hoja de datos )
| Número de pieza | IRPLDIM2E | |
| Descripción | Digital Dimming DALI Ballast | |
| Fabricantes | International Rectifier | |
| Logotipo |  |
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IRPLDIM2E rev.b
International Rectifier • 233 Kansas Street, El Segundo, CA 90245 USA
Digital Dimming DALI Ballast for 36W/T8 220V input
By
Cecilia Contenti and Tom Ribarich (International Rectifier)
and Ross Fosler (Microchip Technology, Inc.)
FEATURES
• Lamp Type: 1X 36W T8 Lamp
• Line Input: 185-265 VAC/50 Hz
• Interface DALI (2 wires)
• High Power Factor/ Low THD
• High Frequency Operation
• Programmable Lamp Filament Preheating
• Programmable Ignition
• High precision Digital Dimming
• Logarithmic Dimming
• Diagnostic and fault control
• Lamp Fault Protection
• Brownout Protection
• IR21592 HVIC Ballast Controller
• PIC16F628 Microcontroller
• Optically Isolated Communications
• Low power standby mode
INTRODUCTION
This reference design is a high efficiency, high power factor, digital dimming electronic ballast designed to drive
rapid start fluorescent lamp types. The design contains an active power factor correction circuit for universal
voltage input as well as a ballast control circuit using the IR21592. The design also includes a PIC16F628
microcontroller and an isolation circuit for connecting to a Digitally Addressable Lighting Interface (DALI). Other
features include EMI filtering, transient protection and lamp fault protection.
1 page  
IRPLDIM2E
BALLAST DESIGN
The ballast design incorporates two parts, hardware and software. The ballast controller design portion incorpo-
rates most of the hardware design. The digital design control portion incorporates most of the software design.
Appendix A shows the complete schematic and Appendix B the Bill of Materials.
The Ballast Controller Design
The design of the Ballast control portion of the circuit has been accomplished in International Rectifier’s Reference
Design IRPLDIM1. Refer to this for waveforms and specific calculations regarding the ballast controller portion of
this design.
Signals of the IR2159
The communication between the microcontroller and the IR21592 is done with four signals, as shown in Fig. 4.
These signals are used for digital dimming (RB3), turning the ballast on or off (RB4), and fault detection (RB5 &
RB6). The microcontroller controls the IR21592 by the following 3 pins: pin SD for shutdown of the IC (active high),
pin FMIN used for fault detection (0 if the IC is
in fault mode) and pin DIM to control the bright-
ness. The microcontroller receives lamp infor-
Lamp
VDD Out
mation by the signal Lamp-out, connected to
R17
the lamp.
If 0 Lamp OK
If 1 Lamp Fault
R16
1 VDC
2 VCO
HO 16
VS 15
1 RA2
2 RA3
3 RA4
RA1 18
RA0 17
RA7 16
C11
3 CPH
VB 14
RDIM
4 DIM
VCC 13
5 MAX
COM 12
TR data signal
from the network
to the micro
Interfac
weith
Optos
RX data signal
from the micro
to the network
4 RA5
5 VSS
6 RB0
7 RB1
8 RB2
9 RB3
RA6 15
VDD 14
RB7 13
RB6 12
RB5 11
RB4 10
If 0 IC OFF
If 1 IC OK
6 MIN
7 FMIN
LO 11
CS 10
8 IPH
SD 9
TURN ON IC
TURN OFF IC
R25
C17
VSS
1.25V
2.5V
3.75V
www.irf.com
Fig. 4 Micro/IR21592 Communication
5
5 Page 
Appendix A: IRPLDIM2E Schematic
IRPLDIM2E
IR21592
PIC16F628
www.irf.com
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet IRPLDIM2E.PDF ] | |
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