IRDC3138EVAL [INFINEON]
EVALUATION BOARD USER GUIDE; 评估板用户指南
| 型号： | IRDC3138EVAL |
| 厂家： | 
Infineon |
| 描述： | EVALUATION BOARD USER GUIDE |
| 文件： | 总6页 (文件大小：541K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
IRDC3138EVAL
IRU3138 EVALUATION BOARD USER GUIDE
DESCRIPTION
SPECIFICATION DATA
The IRU3138 controller IC is designed to provide a low
cost synchronous Buck regulator for voltage tracking
applications such DDR memory and general purpose
on-board DC to DC converter. Modern micro processors
combined with DDR memory, need high-speed bandwidth
data bus which requires a particular bus termination volt-
age. This voltage will be tightly regulated to track the
half of chipset voltage for best performance. The IRU3138
together with two N-channel MOSFETs, provide a low
cost solution for such applications. This device features
a programmable frequency set from 200KHz to 400KHz,
under-voltage lockout for both Vcc and Vc supplies, an
external programmable soft-start function as well as
output under-voltage detection that latches off the de-
vice when an output short is detected.
Switcher:
Vc = 12V
Vcc =VIN =5V
VOUT = 1.6V
IOUT = 12A
∆VOUT = 50mV
FS = 400KHz
INPUT/OUTPUT CONNECTIONS
The following is the input/output connections:
The connection points is shown in Figure 1. Connect the
power supply cables according to this figure, minimize
wire lengths to reduce losses in the wire. Test point J1
provides easy connections for oscilloscope voltage probe
to monitor the output voltage.
Inputs:
JP1: Input (+5V) and GND
JU1: Vcc/Vc
Outputs:
JP2: VOUT (+1.6V)
JP3: Gnd
Other Connections:
J1: Scope connection for Vout
Rev. 1.3
03/29/04
www.irf.com
1
IRDC3138EVAL
Power Supply
Power Supply
CONNECTION DIAGRAM
6A Supply
+12V Gnd
+5V Gnd
Load
0 - 15A
Figure 1 - Connection diagram of evaluation-board for IRU3138.
www.irf.com
Rev. 1.3
03/29/04
2
IRDC3138EVAL
LAYOUT
The top side (component) layer for IRU3138 Eval board point of regulation.
is shown in Figure 2. The input capacitors are all located
close to the MOSFETs. All the decoupling capacitors, The PCB is 4-layers board, one layer is dedicated to
and feedback components are located close to IC. The Power GND and the analog GND is kept separated from
feedback resistors are tied to the output voltage at the the PGND and it is connected at a single point.
Figure 2 - Top layer of evaluation-board for IRU3138.
Rev. 1.3
03/29/04
www.irf.com
3
IRDC3138EVAL
SCHEMATIC
1
2
3
4
D
D
C
B
A
JP1
C1
+5V
INPUT
+5V
R15
L1
D1
GND
C20
C19
C23
R14
VC
R12
R2
N10
JU1
R16
C3
C18
C4
C5
C7
C
B
A
C2
C6
VREF1
VDDQ
J1
R3
D3
Q1
Q2
R13
R1
VREF
3
2
9 HDRV
N1C41
VGH
1
Vref
Vp
HDrv
NC
L2
JP2
VP
SS
U1
IRU3138
N25
VO
+VO
C8
R4
13
11
12
N5C2
SS
NC
C9
C10
C11
C21
C22
C12
OUTPUT
+
+
+
+
RT
6
8
LDRV
VGL
N50
Rt
LDrv
PGnd
VO
R5
COMP
1
R6
Comp
D2
1
7
Fb
R7
Gnd
JP3
G+ ND
+C24
+C25
FB
OUTPUT
C13
C14
R8
N30
GND
C15
C16
C17
R9
R10
N40
R11
Title
Size
IRU3138
Number
Revision
JE3138S-V2R0
5-Sep-2003
C:\Old_Drv\pcb\PCB_last2.ddb
V2R0
Orcad A
Date:
File:
Sheet of
Drawn By:
1
2
3
4
Figure 3 - Schematic of evaluation-board for IRU3138.
www.irf.com
Rev. 1.3
03/29/04
4
IRDC3138EVAL
BILL OF MATERIAL
Ref Desig Description
Value
Qty
1
Part#
Manuf
Web site (www.)
irf.com
Q1
Q2
U1
D3
L1
MOSFET
MOSFET
Controller
Diode
20V, 11mΩ
IRLR3715Z
IR
20V, 6mΩ
1
1
1
IRFR3711Z
IRU3138
BAT54S
IR
IR
IR
Synchronous PWM
Fast Switching
1µH, 10A
1.1µH, 16A
150µF, 6.3V
Inductor
Inductor
1
1
4
D03316P-102HC
ETQP6F1R1BFA
6TPC150M
Coilcraft
coilcraft.com
L2
Panasonic maco.panasonic.co.jp
Sanyo
Sanyo
C1,2,18,20 Cap, Poscap
C11,21,22 Cap, Poscap
sanyo.com/industrial
330µF, 6.3V, 40mΩ
3
6TPC330M
C8
Cap, Ceramic 0.1µF, Y5V, 25V
1
3
ECJ-2VF1E104Z
ECJ-3YB1E105K
ECJ-2VB1H101J
ECJ-2VB2D471K
ECJ-2VF1C105Z
Panasonic maco.panasonic.co.jp
Panasonic
C3,4,6,12 Cap, Ceramic 1µF, X7R, 25V
C7
C9
Cap, Ceramic 100pF, 50V
Cap, Ceramic 470pF, X7R
1
1
3
Panasonic
Panasonic
Panasonic
C3,C6,C12 Cap, Ceramic 1µF, Y5V, 16V
R9
R6
R8,R11
Resistor
Resistor
Resistor
17.8K, 5%
4.7Ω, 5%
1K, 1%
0Ω
1
1
2
R2,3,4,5,15 Resistor
R1,7,10,12, Resistor
13,14,16
4
7
Not Used
5
10
1
C7,10,13,14 Capacitor
16,17,19,23
Not Used
Not Used
24,25
D2
Diode
TYPICAL OPERATING CHARACTERISTICS
Vin=5.0V, Vout=1.6V
92
90
88
86
84
82
80
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Output Current (A)
Start-up time
Ch2:VC, Ch3:SS pin, Ch4:Vout
Efficiency
Rev. 1.3
03/29/04
www.irf.com
5
IRDC3138EVAL
TYPICAL OPERATING CHARACTERISTICS
Output Voltage Ripple @ 15A
Ch1:Output, Ch4:Iout (5A/Div)
Shut Down the output by pulling down the soft-start pin
Ch1: HDrv, Ch2:LDrv, Ch3: SS pin
Transient response @ Iout=15A
Ch1: Output, Ch4:Iout (5A/Div)
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7903
Visit us at www.irf.com for sales contact information
Data and specifications subject to change without notice. 02/01
Rev. 1.3
03/29/04
www.irf.com
6
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