IRS2552DPBF International Rectifier, IRS2552DPBF Datasheet - Page 19

• Manufacturer Part Number: IRS2552DPBF
• Description: IC CTLR BALLAST CCFL/EEFL 16-DIP
• Manufacturer: International Rectifier
• Type: CCFL/EEFL Controllerr

Specifications of IRS2552DPBF

• Frequency: 39 ~ 69 kHz
• Current - Supply: 10mA
• Current - Output: 450mA
• Voltage - Supply: 10.6 V ~ 15.6 V
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-DIP (0.300", 7.62mm)
• Module Configuration: Half Bridge
• Supply Current: 10mA
• Supply Voltage Range: 9.6V To 16.6V
• Driver Case Style: DIP
• No. Of Pins: 16
• Operating Temperature Range: -40°C To +125°C
• Base Number: 25
• Rohs Compliant: Yes
• Svhc: No SVHC
• Package: 16-pin DIP
• Circuit: Half-Bridge Driver
• Offset Voltage (v): 600
• Output Source Current Min (ma): 300
• Output Sink Current Min (ma): 450
• Pbf: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Soft start
In addition the IRS2552D includes a soft start function that operates at the start of each burst, during dimming
operation when VDIM < VDIM
start of each burst from CR = 0 V to CR = VCR
will linearly increase to 50% (minus the dead time) when VCR reaches VCR
RUN mode and allows inrush currents to be eliminated during burst mode dimming, while always maintaining the
frequency at F
www.irf.com
0.2V
DIM
VDIM <VCRSS
VCRSS <VDIM<VDIMSS
VDIM>VDIMSS
HO
LO
MIN
1V
5V
.
increases from 10%
Soft Start
Duty cycle
to 50%
ICCRUN charges CR up to VCR+. CR oscillates at fCR (sawtooth)
SS
. The soft start will operate during the portion of the dimming ramp CR at the
CR
Half-bridge oscillates at FMIN. VDC reset to 0V
DC increases from DC
SOFT START
min to DC max
VCR<VCRSS
VCR<VCRSS
Figure 4: Dimming waveform
Soft Start
SS
. When VCR = 0 the duty cycle will be at minimum (DCMIN) and
RUN MODE
19
DC=DCmax
VCR<VDIM
VCR<VDIM
ON
Soft Start
SS
. This function is enabled only in
VCR>VDIM
VCR>VDIM
VCR>VDIM
DC=0
OFF
© 2009 International Rectifier
IRS2552D