IRDCIP1206-A【PDF 1/14 页】BOARD DEMO SYNC BUCK CONVETER

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R E F E R E N C E D E S I G N IRDCiP1206-A

International Rectifier ? 233 Kansas Street, El Segundo, CA 90245 USA

IRDCiP1206-A: 300 kHz, 30A, Synchronous

Buck Converter using iP1206

Overview

This reference design is capable of delivering a continuous

current of 30A (at an ambient temperature of 25oC and no

airflow. Figures 1–16 provide performance graphs, thermal

images, and waveforms. Figures 17–27, and Table 1 are

provided to engineers as design references for implementing

an iP1206 solution. The components installed on this

demoboard were selected based on operation at an input

voltage of 12V and at a switching frequency of 300 kHz.

Changes from these set points may require optimizing the

control loop and/or adjusting the values of input/output filters in

order to meet the user’s specific application requirements.

Refer to the iP1206 datasheet User Design Guidelines section

for more information.

Note: The 16-pin connector (CON1) is used only for

production test purposes and should not be used for

evaluation of this demoboard.

Demoboard Quick Start Guide

Initial Settings:

VOUT is set to 1.2V, but can be adjusted from 0.8V to 5.5V by changing the values of R5 and R6 according to the following

formula:

R5 = R6 = (10.0k * 0.8) / (VOUT - 0.8)

The switching frequency is set to 300kHz, but can be adjusted by changing the value of R T . The graph in Figure 18 shows the

relationship between R T and the switching frequency.

Power Up Procedure:

1. Apply input voltage across VIN and PGND.

2. Apply load across VOUT pads and PGND pads.

3. Adjust load to desired level. See recommendations below.

IRDCiP1206-A Recommended Operating Conditions

(Refer to the iP1206 datasheet for maximum operating conditions)

Input voltage: 7.5V – 14.5V

Output voltage: 0.8 – 5.5V

Switching Freq: 300kHz

Output current: This reference design is capable of delivering a continuous current of 30A (without heatsink) at an

ambient temperature of 45oC with 200LFM of airflow.

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