DIMMING BALLAST CONTROL IC - International Rectifier
Description
Data Sheet No.
PD60194_A
IR21592(S) IR21593(S)
Features
DIMMING BALLAST CONTROL IC
• Full lamp fault protection • Brown-out protection • Automatic restart • Micro-power startup • Zener clamped Vcc • Over-temperature protection • 16-pin DIP and SOIC package types
Parameter Deadtime Frequency Range IR21592 1.
8us See Graph 11 IR21593 1.
0us See Graph 12
• Ballast control and half-bridge driver in one IC • Transformer-less lamp power sensing • Closed-loop lamp power control • Closed-loop preheat current control • Programmable preheat time • Programmable preheat current • Lamp ignition detection • Programmable ignition-to-dim time • 0.
5 to 5VDC dimming control input • Min and max lamp power adjustments • Programmable minimum frequency • Internal current sense blanking
Description
Description: The IR21592/IR21593 are complete dimming ballast controllers and 600V half-bridge drivers all in one IC.
The architecture includes phase control for transformer-less lamp power sensing and regulation which minimizes changes needed to adapt non-dimming ballasts for dimming.
Externally programmable features such as preheat time and current, ignition-to-dim time, and a complete dimming interface with minimum and maximum settings provide a high degree of flexibility for the ballast design engineer.
Protection from failure of a lamp to strike, filament failures, thermal overload, or lamp failure during normal operation, as well as an automatic restart function, have been included in the design.
The heart of this control IC is a voltagecontrolled oscillator with externally programmable minimum frequency.
The IR21592/ IR21593 are available in both 16 pin DIP and 16 pin narrow body SOIC packages.
Packages
16 Lead SOIC (narrow body)
16 Lead PDIP
Typical Connection
+ Rectified AC Line
+ DC Bus
RVDC CVDC CVCO CPH RDIM RMAX RMIN RFMIN RIPH RVAC RPULL-UP
1 16
Single Lamp Dimmable
VDC
HO
2
VCO
VS
15
3
CPH
VB
14
0.
5 to 5VDC
4
DIM
VCC
13
5
MAX
COM
12
6
MIN
LO
11
7
...
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