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IRDCIP1201-A Datasheet(PDF) 1 Page - International Rectifier

No. de Pieza. IRDCIP1201-A
Descripción  300kHz, Dual 15A, 3.14V IN to 5.5V IN Dual Output Synchronous Buck Converter using iP1201
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Fabricante  IRF [International Rectifier]
Página de inicio  http://www.irf.com
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IRDCIP1201-A Datasheet(HTML) 1 Page - International Rectifier

   
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08/18/03
IRDCiP1201-A, 300kHz, Dual 15A, 3.14V
IN to 5.5VIN Dual
Output Synchronous Buck Converter using iP1201
Overview
The iP1201 is fully optimized solution for medium current synchro-
nous buck applications requiring up to 15A or 30A. In this document,
Fig. 1, 2, 3 and 4 are provided to enable engineers to easily evaluate
the iP1201 in an independent and parallel configuration that is
capable of providing up to 15A per phase with double-sided heat
sinking. Fig. 6, 7 and 8 and the complete bill of materials in Table 1
are provided as a reference design to enable engineers to very quickly
and easily design a dual phase converter. In order to optimize this
design to your specific requirements, refer to the iP1201 data sheet for
guidelines on external component selection and user adjustable
limits and specifications. Custom designs may require layout modifi-
cations.
Demoboard Quick Start Guide
Initial Settings:
The output1 is set to 1.5V and output2 is set to 2.5V for independent configuration.
The output1 is set to 1.5V with R8, R10, R11 and R12 removed for parallel configuration.
Output can be adjusted from 0.8V to 3.3V as follow:
1. V
OUT1: R9=R13= R7 [(VOUT 1/ Vref) – 1]. Set R7=R14=1k,Vref=0.8V
2. V
OUT2: R10=R11= R8 [(VOUT2 / Vref) – 1]. Set R8=R12=1k,Vref=0.8V.
The switching frequency is set to R3=30.9k for 300kHZ
The input voltage range can be increased to allow operation between 3.14V
IN and 5.5VIN.
For paralleled single output operation see Fig. 6 for configuration table in reference design
schematic.
Procedure for Connecting and Powering Up Demoboard:
1.
Connected JP2 for V
IN < 3.5V.
2.
Disconnected JP2 for VIN > 3.5V.
3.
Make sure JP3 is connected
4.
Apply input voltage (3.14V-5.5V) across V
IN and PGND
5.
Apply load across VOUT1 pad and PGND pad and VOUT2 pad and PGND pad for independent
configuration.
6.
Apply load across VOUT1 pad and PGND pad and short R23 for parallel configuration.
7.
Adjust load accordingly.
IRDCiP1201-A Recommended Operating Conditions
(refer to the iP1201 datasheet for maximum operating conditions)
Input voltage:
3.14 - 5.5V
Output voltage:
Can be set between 0.8V – 3.3V, up to 90% max duty cycle.
Output current:
Up to 15A (see recommended operating area Fig. 1, 2 and 3). The maximum current
should be limited to 11.5A if the PCB is the only heat sink.
Switching Freq: 200kHz to 400kHz selectable.
IRDCiP1201-A
International Rectifier
• 233 Kansas Street, El Segundo, CA 90245 USA
REFERENCE DESIGN
REFERENCE DESIGN


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