IP1206TRPBF International Rectifier, IP1206TRPBF Datasheet - Page 11

• Manufacturer Part Number: IP1206TRPBF
• Description: IC PWR BLOCK MULTIPHASE 30A LGA
• Manufacturer: International Rectifier
• Series: iPOWIR™r
• Type: Step-Down (Buck), PWM - Voltage Moder

Specifications of IP1206TRPBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1 or 2
• Voltage - Output: 0.8 V ~ 5.5 V
• Current - Output: 30A, 15A
• Frequency - Switching: 200kHz ~ 600kHz
• Voltage - Input: 7.5 V ~ 14.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: *
• Package / Case: *
• Package: LGA - 15.5 x 9.25
• Circuit: Single Output or Dual Ch
• Iout (a): 30
• Switch Freq (khz): 200 - 600
• Input Range (v): 7.5 - 14.5
• Output Range (v): 0.8 - 5.5
• Ocp Otp Uvlo Pre-bias Soft Start And: Pre-Bias + SEQ + SYNC + Tracking
• Pbf: PbF Option Available
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Internal Regulator
iP1206 features an on-board regulator capable of
sourcing current up to 100mA. This integrated
regulator can be used to generate the necessary
bias voltage for drivers. An example of how this
can be used is shown in Fig. 25. The output of
the regulator is protected for short circuit and
thermal shutdown.
Out-of-Phase Operation
The iP1206 drives its two output stages 180
of-phase. In current share mode (single output),
the two inductor ripple currents cancel each other
and result in a reduction of the output current
ripple and yield a smaller output capacitor for the
same ripple voltage requirement. Fig. 7 shows
two channels inductor current and the resulting
voltage ripple at output.
HDRV2
Ic
HDRV1
IL1
Fig. 7: Current ripple cancellation for output
0
IL2
DT
T
o
out-
2/26/2008
Io
In addition, the 180
contributes to input current cancellation. This
results in a much smaller input capacitor - RMS
current thereby reducing the input capacitor
quantity. Fig. 8 shows the equivalent RMS
current.
Mode Selection
The iP1206 can operate as a dual output
independently regulated buck converter, or as a
2 phase single output buck converter (in current
share mode). The SS2 pin is used for mode
selection. In current share mode this pin should
be floating and in dual output mode a soft start
capacitor must be connected from this pin to
ground to program the start time for the second
output.
Independent Mode
In this mode the iP1206 provides control to two
independent output power supplies with either
common or different input voltages. The output
voltage of each individual channel is set and
controlled by the output of the error amplifier,
which is the amplified error signal from the
sensed output voltage and the reference voltage.
The error amplifier output voltage is compared to
the ramp signal thus generating fixed frequency
pulses of variable duty-cycle, (PWM) which are
applied to the internal MOSEFT drivers. Fig. 25b
shows
application.
Fig. 8: Input RMS value vs. Duty Cycle
a
typical
Duty Cycle (Vo/Vin)
schematic
o
2 Phase
Single Phase
out of phase operation
iP1206PbF
for
such
an
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