IRDCIP2003A-C [INFINEON]
1MHz, 160A, Synchronous Buck Converter Using iP2003A; 为1MHz ， 160A ，同步降压转换器使用iP2003A
| 型号： | IRDCIP2003A-C |
| 厂家： | 
Infineon |
| 描述： | 1MHz, 160A, Synchronous Buck Converter Using iP2003A |
| 文件： | 总8页 (文件大小：1418K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
R
EFERENCE
D
ESIGN IRDCiP2003A-C
International Rectifier • 233 Kansas Street, El Segundo, CA 90245 USA
IRDCiP2003A-C: 1MHz, 160A, Synchronous Buck
Converter Using iP2003A
Overview
This reference design is capable of delivering up to a current of
160A with the enclosed heatsink attached at an ambient
temperature of 60ºC with 400LFM or an ambient temperature of
45ºC with 200LFM of airflow. Performance graphs and waveforms
are provided in figures 1–9. The figures and table in pages 5 – 8
are provided as a reference design to enable engineers to very
quickly and easily design a 4-phase converter. Refer to the data
sheet for the controller listed in the bill of materials in order to
optimize this design to your specific requirements. A variety of other
controllers may also be used, but the design will require layout and
control circuit modifications.
Demoboard Quick Start Guide
Initial Settings:
The output is set to 1.3V, but can be adjusted from 0.8V to 3.3V by changing the voltage divider values of R3 and R32 according
to the following formula:
R3 = R32 = (24.9k x 0.8) / (VOUT - 0.8)
The switching frequency per phase is set to 1MHz with the frequency set resistor R4. This creates an effective output frequency of
4MHz. The graph in figure 11 shows the relationship between R4 and the switching frequency per phase. The frequency may be
adjusted by changing R4 as indicated; however, extreme changes from the 1MHz set point may require redesigning the control
loop and adjusting the values of input and output capacitors. Refer to the SOA graph in the iP2003A datasheet for maximum
operating current at different conditions.
Procedure for Connecting and Powering Up Demoboard:
1. Apply input voltage across (+12V) across VIN and PGND.
2. Apply load across VOUT pads and PGND pads.
3. Adjust load to desired level. See recommendations below.
IRDCiP2003A-C Recommended Operating Conditions
(refer to the iP2003A datasheet for maximum operating conditions)
Input voltage:
Output voltage:
Switching Freq:
Output current:
5V - 12V1
0.8 - 3.3V
1MHz per phase, 4MHz effective output frequency.
This reference design is capable of delivering up to 160A with the enclosed heatsink attached, at an
ambient temperature of 60ºC with 400LFM of airflow, or an ambient temperature of 45ºC with 200LFM of
airflow.
1Note: If Vin = 5V, then connect Vin to test point TP3 and Terminal T1 and remove jumper J1. Refer to schematic for details.
Additionally, the threshold of the POR circuit should be adjusted to allow the supply to sequence properly.
12/03/04
IRDCiP2003A-C_ ____
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55.0
86%
85%
84%
83%
82%
81%
80%
79%
78%
77%
76%
75%
74%
73%
72%
71%
70%
50.0
VIN = 12V
45.0
VOUT = 1.3V
40.0
35.0
30.0
25.0
20.0
15.0
10.0
5.0
fSW = 1MHz
TA = 25°C
VIN = 12V
OUT = 1.3V
fSW = 1MHz
TA = 25°C
V
0.0
0
20
40
60
80
100
120
140
160
0
20
40
60
80
100
120
140
160
Output Current (A)
Output Current (A)
Fig. 1: Power Loss vs. Current
Fig. 2: Efficiency vs. Current
Phase Margin = 61°
Cross-Over Freq. = 106kHz
VIN = 12V
OUT = 1.3V
V
IOUT = 160A
fSW = 1MHz
TA = 25°C
Fig. 3: Bode Plot
VIN = 12V,
VOUT = 1.3V
IOUT = 160A,
VIN = 12V,
VOUT = 1.3V
IOUT = 160A,
fSW = 1MHz
fSW = 1MHz
TA = 25°C
TA = 25°C
Ripple = 90mVp-p
Ripple = 7.0mVp-p
Fig. 4: Input Voltage Ripple Waveform
Fig. 5: Output Voltage Ripple Waveform
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__IRDCiP2003A-C
100.0%
99.8%
99.6%
99.4%
99.2%
99.0%
98.8%
98.6%
98.4%
98.2%
98.0%
VIN = 12V
VOUT = 1.3V
fSW = 1MHz
TA = 25°C
0
20
40
60
80
100
120
140
160
Output Current (A)
Fig. 6: Output Voltage Accuracy vs. Current
VIN = 12V
VOUT = 1.3V
IOUT = 160A
fSW = 1MHz
TA = 25°C
VIN = 12V
VOUT = 1.3V
IOUT = 160A
fSW = 1MHz
TA = 25°C
Ch. 1: VIN
2V/div
Ch. 1: VIN
2V/div
Ch. 2: VOUT
0.5V/div
Ch. 2: VOUT
0.5V/div
Fig. 7: Power Up Waveform
Fig. 8: Power Down Waveform
VIN = 12V
VOUT = 1.3V
fSW = 1MHz
TA = 25°C
Ch. 1: VOUT
1V/div
Hiccups
until short
circuit is
removed
Short
circuit at
start-up
Ch. 2: IOUT
50A/div
Fig. 9: Short Circuit Condition Waveform
3
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IRDCiP2003A-C_ ____
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VIN = 12V
VOUT = 1.3V
IOUT = 160A
*>120.0°C
Max
70.7°C
Board Temperature @ 1mm
from edge of module:
120.0
100.0
80.0
f
SW = 1MHz
TA = 45°C
Airflow = 200LFM
T
PCB (U2): 83.4°C
TPCB (U3): 82.7°C
PCB (U4): 82.3°C
T
TPCB (U5): 79.2°C
60.0
40.0
Airflow direction
*<21.3°C
VIN = 12V
VOUT = 1.3V
IOUT = 160A
fSW = 1MHz
TA = 60°C
*>120.0°C
120.0
Max
78.5°C
Board Temperature @ 1mm
from edge of module:
Airflow = 400LFM
100.0
80.0
60.0
40.0
T
PCB (U2): 88.9°C
TPCB (U3): 87.5°C
TPCB (U4): 87.3°C
TPCB (U5): 85.1°C
Airflow direction
*<21.3°C
Fig. 10: Thermal Images With Board and Heatsink Temperatures
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__IRDCiP2003A-C
Adjusting the Over-Current Limit
R5, R7, R8, and R9 are the resistors used to adjust the over-current trip point. The trip point is a function of the controller and
corresponds to the per phase output current indicated on the x-axis of Fig. 11. For example, selecting 3.65k resistors will set the
trip point of each phase to 66A. (Note: Fig. 11 is based on iP2003A, TJ = 125
reference board is cool and is being used for short circuit testing.)
°
C. The trip point will be higher than expected if the
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
2.4
43
45
47
49
51
53
55
57
59
61
63
65
67
Over-Current Trip Point (per Phase)
Fig. 11: RISEN vs. Current (per Phase)
100
10
100
1000
Output Frequency (kHz) (per Phase)
Fig. 12: R4 vs. Frequency (per Phase)
5
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IRDCiP2003A-C_ ____
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Fig. 13: Component Placement Top Layer
Heatsink Notes:
1) Always use the supplied Berquist Gap PadTM A3000 thermal interface material with heatsink.
2) Torque 5 x #2-56 machine screws to 15 +/-1 in-oz.
3) The heatsink is optimized for 400 LFM with unconfined airflow. Performance will improve with more airflow or confined
airflow.
4) Airflow direction should be parallel to fins for maximum performance.
Fig. 14: Heatsink Specification
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__IRDCiP2003A-C
n e o p
n e o p
0 1 0 u
n e o p
F u 0 1 0
F u 0 1 0
F u 0 1 0
n e o p
F
F
F
0 u 1 0
0 u 1 0
0 u 1 0
F
F
F
F u 1 0 0
F u 1 0 0
F u 1 0 0
0 1 0 u
0 1 0 u
n e o p
n e o p
F u 1 0
F u 1 0
F u 1 0
F u 1 0
n e o p
n e o p
n e o p
n e o p
n e o p
n e o p
F u 1 0
F u 1 0
F u 1 0
F u 1 0
F u 2 2 .
F u 2 2 .
F
F
F
F
1 0 u
F
F
F
F
1 0 u
1 0 u
1 0 u
1 0 u
1 0 u
1 0 u
1 0 u
F
2 u 2 .
2 u 2 .
F
2 u 2 .
F 2 u 2 .
F
F
2 u 2 .
F 2 u 2 .
2 S
1 S
W
W
V S
V S
2 S
1 S
W
W
V S
V S
2 S
1 S
W
W
V S
V S
2 S
1 S
W
W
V S
V S
1 0
1 0
9
1 0
9
1 0
9
9
2
3
1
2
P
M C O
3
4
5
O O D P R
F B
d n j / d G A
1
Fig. 15: Reference Design Schematic
7
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IRDCiP2003A-C_ ____
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Table 1: Reference Design Bill of Materials
Refer to the following application notes for detailed guidelines and suggestions when
implementing iPOWIR Technology products:
AN-1028: Recommended Design, Integration and Rework Guidelines for International Rectifier’s
iPowIR Technology BGA and LGA and Packages
This paper discusses optimization of the layout design for mounting iPowIR BGA and LGA packages on
printed circuit boards, accounting for thermal and electrical performance and assembly considerations.
Topics discussed includes PCB layout placement, and via interconnect suggestions, as well as soldering,
pick and place, reflow, inspection, cleaning and reworking recommendations.
AN-1030: Applying iPOWIR Products in Your Thermal Environment
This paper explains how to use the Power Loss and SOA curves in the data sheet to validate if the
operating conditions and thermal environment are within the Safe Operating Area of the iPOWIR product.
AN-1047: Graphical solution for two branch heatsinking Safe Operating Area
Detailed explanation of the dual axis SOA graph and how it is derived.
Use of this design for any application should be fully verified by the customer. International Rectifier
cannot guarantee suitability for your applications, and is not liable for any result of usage for such
applications including, without limitation, personal or property damage or violation of third party
intellectual property rights.
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7903
www.irf.com
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