IP1001 Ver la hoja de datos (PDF) - International Rectifier

Número de pieza

componentes Descripción

Fabricante

IP1001

Full Function Synchronous Buck Power Block

International Rectifier 

iP1001

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

0

Guaranteed Performance Curves

22

20

VIN = 12V

VOUT = 1.3V

TBLK=125°C

fsw set to 300kHZ

Maximum

18

16

14

12

Safe Operating Area

10

Typical

8

VIN = 12V

6

VOUT = 1.3V

4

fsw set to 300kHZ

2

2 4 6 8 10 12 14 16 18 20

0

0 10 20 30 40 50 60 70 80 90 100 110 120 130

Output Current (A)

PCB Temperature (°C)

Fig 1. Power Loss vs Current

Fig 2. Safe Operating Area (SOA) vs TPCB

Adjusting the Power Loss and SOA curves for different operating conditions

To make adjustments to the power loss curves in Fig. 1, multiply the normalized value obtained from the curves in Figs. 3,

or 4 by the value indicated on the power loss curve in Fig. 1. If multiple adjustments are required, multiply all of the

normalized values together, then multiply that product by the value indicated on the power loss curve in Fig. 1. The resulting

product is the final power loss based on all factors.

To make adjustments to the SOA curve in Fig. 2, determine the maximum allowed PCB temperature in Fig. 2 at the required

operating current. Then, add the correction temperature from the normalized curves in Figs. 3 or 4 to find the final maximum

allowable PCB temperature. When multiple adjustments are required, add all of the temperatures together, then add the sum

to the PCB temperature indicated on the SOA graph to determine the final maximum allowable PCB temperature based on

all factors.

Note: If input voltage <5Vin nominal operation is required then first see Fig. 5 for maximum current capability limit.

Operating Conditions for the examples below:

Output Current = 20A

Output Voltage = 2.5V

Input Voltage = 7V

Adjusting for Maximum Power Loss:

(Fig. 1)

(Fig. 3)

(Fig. 4)

Maximum power loss =5 W

Normalized power loss for output voltage ≈1.14

Normalized power loss for input voltage ≈0.89

Adjusted Power Loss = 5W x 0.89 x 1.14 ≈ 5.07W

Adjusting for SOA Temperature:

(Fig. 2)

(Fig. 3)

(Fig. 4)

SOA PCB Temperature = 90°C

Normalized SOA PCB Temperature for output voltage ≈ -4.5°C

Normalized SOA PCB Temperature for input voltage ≈ 4°C

Adjusted SOA PCB Temperature = 90°C + 4°C -4.5°C ≈ 89.5°C

4

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