IP2004TR International Rectifier, IP2004TR Datasheet - Page 7

• Manufacturer Part Number: IP2004TR
• Description: IC PWR BLOCK MULTIPHASE 40A LGA
• Manufacturer: International Rectifier
• Series: iPOWIR™r
• Type: Step-Down (Buck)r

Specifications of IP2004TR

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 8 V
• Current - Output: 40A
• Frequency - Switching: 250kHz ~ 1.5MHz
• Voltage - Input: 3.3 ~ 13.2 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: Power Block (LGA)
• Power - Output: 7.4W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Calculating Power Loss and SOA for Different Operating Conditions
To calculate Power Loss for a given set of operation conditions, the following procedure
should be followed:
Power Loss Procedure
To calculate the Safe Operating Area (SOA) for a given set of operating conditions, the
following procedure should be followed:
SOA Procedure
Design Example
Operating Conditions:
Output Current = 30A
Switching Freq = 750kHz
Calculating Maximum Power Loss:
Page 7 of 15
1. Determine the maximum current for each iP2004 and obtain the maximum power loss
2. Use the Normalized curves in page 5 to obtain power loss values that match the
3. The maximum power loss under the Application conditions is then the product of the
1. Determine the maximum PCB and CASE temperature at the maximum operating
2. Use the Normalized curves in page 5 to obtain SOA temperature adjustments that
3. Then, add the sum of the SOA temperature adjustments to the T
from Figure 1
operating conditions in the Application
power loss from Figure 1 and the normalized values.
current for each iP2004
match the operating conditions in the Application
Figure 2
Calculated Maximum Power Loss ≈ 8.0W x 0.98 x 1.23 x 0.96 x 1.03 x 0.91 ≈ 8.68W
(Figure 1)
(Figure 3)
(Figure 4)
(Figure 5)
(Figure 6)
(Figure 7)
Maximum power loss = 8.0W
Normalized power loss for input voltage ≈ 0.98
Normalized power loss for output voltage ≈ 1.23
Normalized power loss for drive voltage (V
Normalized power loss for output inductor ≈ 1.03
Normalized power loss for switch frequency ≈ 0.91
Input Voltage = 10V
Inductor = 0.2µH
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Output Voltage = 3.3V
Drive Voltage (V
Data Sheet No. PD60322
DD
12/22/2007
X
) ≈ 0.96
axis intercept in
DD
iP2004
) = 5.5V