Preliminary Data Sheet No. PD60169-E
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IR2159
IR21591
DIMMING BALLAST CONTROL IC
Features
Brown-out protection
Automatic restart
Micro-power startup
Zener clampedVcc
Over-temperature protection
16-pin DIP and SOIC package types
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Ballast control and half-bridge driver in one IC
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Transformer-less lamp power sensing
Closed-loop lamp power control
Closed-loop preheat current control
Programmable preheat time
Programmable preheat current
Programmable ignition-to-dim time
0.5 to 5VDC dimming control input
Min and max lamp power adjustments
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Parameter
Deadtime
Frequency
Range
IR2159
1.8us
See
IR21591
1.0us
See
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Programmable minimum frequency
Internal current sense blanking
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Graph 3
Graph 4
Full lamp fault protection
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Packages
Description
Description:The IR2159/IR21591 are complete dimming ballast controllers and 600V
half-bridge drivers all in one IC.The architecture includes phase control for trans-
former-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 voltage-
controlled oscillator with externally programmable minimum frequency.The IR2159/
IR21591 are available in both 16 pin DIP and 16 pin narrow body SOIC packages.
16 Lead SOIC
(narrow body)
16 Lead PDIP
Typical Connection
+ Rectified AC Line
Single Lamp Dimmable
+ DC Bus
RVAC
RPULL-UP
RVDC
CVDC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VDC
VCO
CPH
DIM
HO
VS
CVCO
CPH
VB
RDIM
RMAX
RMIN
RFMIN
RIPH
VCC
COM
LO
0.5 to 5VDC
MAX
MIN
FMIN
IPH
CS
SD
RCS
- DC Bus
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