IRDC3637EVAL [INFINEON]
IR3637 EVALUATION BOARD USER GUIDE; IR3637评估板操作指南
| 型号： | IRDC3637EVAL |
| 厂家： | 
Infineon |
| 描述： | IR3637 EVALUATION BOARD USER GUIDE |
| 文件： | 总8页 (文件大小：753K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
IRDC3637EVAL
IR3637 EVALUATION BOARD USER GUIDE
DESCRIPTION
The IR3637 controller IC is designed to
provide a low cost synchronous Buck
regulator for on-board DC to DC
applications in a small 8-pin SOIC. The
output voltage can be precisely regulated
using the internal 0.8V reference voltage
for low voltage applications.
The IR3637 operates at a fixed internal
400KHz switching frequency to reduce the
component size.
The reference board is designed for
1.8V output using +5V and +12V
supplies. This will demonstrate the
main features of IC.
This user guide contains the schematic
and bill of materials, the design
guidelines are described in data sheet.
SPECIFICATION DATA
Vc = 12V
The device features under-voltage lockout
for both input supplies, an external
programmable soft-start function as well as
output under-voltage detection that latches
off the device when an output short is
detected.
Vcc=Vin=5V
Vout=1.8V
Iout =7A
Output Ripple = 50mV
Fs = 400KHz
INPUT / OUTPUT CONNECTIONS
The connection points are shown in
Figure1. Connect the power supply
cables according to this figure,
minimizing wire lengths to reduce
losses in the wire. Test points J1 and
J2 provide easy connection for
oscilloscope voltage probe to monitor
the inductor points and output voltage.
The following is the input / output connections:
Inputs:
JP1: Input (+5V) and GND
JU1: Vc
Outputs:
JP2: Vout (+1.8V) and GND
Other Connections:
J1: Scope connection for Vout
J2: Scope connection for Inductor Point
PACKAGE INFORMATION
1
2
3
4
8
7
6
5
Fb
Vcc
SS/SD
Comp
Vc
LDrv
Gnd
HDrv
Rev1.0
4/29/2005
1
IRDC3637EVAL
CONNECTION DIAGRAM
+12V
Supply
+5V
7A
Supply
Load
Figure 1 – Connection diagram of evaluation board for IR3637
Rev1.0
4/29/2005
2
IRDC3637EVAL
LAYOUT
The top side (component) layer for
IR3637 Eval board is shown in Figure
2. The input capacitors are all located
close to the MOSFETs. All the
decoupling capacitors, and feedback
components are located close to IC.
The feedback resistors are tied to the
output voltage at the point of
regulation.
The PCB is 4-layers board, one
layer is dedicated to Power GND
and the analog GND is kept
separated from the PGND and it is
connected at a single point.
Figure 2 – Top layer of evaluation board for IR3637
Rev1.0
4/29/2005
3
IRDC3637EVAL
SCHEMATIC
1
2
3
4
JP1
VIN
VIN
D
C
B
A
D
C
B
A
INPUT
GND
R4
C8
C9
D1
VC
VC/VCC
JU1
BAT54SCT
C6
R5
C10
C1
C5
Q1
S1
J2
J1
D1
C2
R6
SS 8
COM7 P
1
5HDRV
VGH
G1
SS
HDRV
LDR V
GND
D1
L1
JP2
D3
U1
IR3637
+
VO
N25
D2
LX
VO
3
COMP
FB
S2
C11
OUTPUT
C12
+
C13
+
R7
LDR V
4
VGL
G2
D2
GND
MOSFET N_DUAL
R1
C3
R8
C4
R9
C7
N40
R10
R3
R2
Title
Si ze
IR3637 - DUAL SO8 MOSFET
Number
Revision
JE3637S-V1R0
Orcad A
Date:
File:
10-Mar-2005
Sheet of
Drawn By:
C:\PCB2\PCB_last6.ddb
1
2
3
4
Figure 3 – Schematic of the evaluation board
Rev1.0
4/29/2005
4
IRDC3637EVAL
BILL OF MATERIAL
Ref Desig
Description
Value
Qty
Part#
Manuf
Q1
Dual MOSFET
20V, 13.4mOhm
1
IRF8910
IR
U1
D3
Controller
Diode
Synchronous PWM
Fast Switching
1
1
1
4
IR3637
BAT54A
IR
IR
L1
Inductor
1.5uH, 8A, 10 mOhm
150uF, 6.3V, 40mOhm
DO3316P-152
6TPC150M
Coilcraft
Sanyo
C8,9,12,13
Cap, Poscap
C2,C5
Cap, Ceramic
Cap, Ceramic
0.1uF, X7R, 16V
1uF, X5R, 6.3V
2
3
ECJ-1VB1C104K
ECJ-1VB0J105K
Panasonic
Panasonic
C1,10,11
C3
C4
Cap, Ceramic
Cap, Ceramic
Resistor
Resistor
Resistor
Resistor
Resistor
Capacitor
Diode
22pF, NPO, 100V
1800pF, X7R, 50V
16K, 1%
1
1
1
1
1
4
3
2
1
2
2
1
ECJ-1VC2A220J
Panasonic
Panasonic
ECJ-1VB1H182K
R3
Any
Any
Any
Any
R8
1.24K, 1%
R9
1K, 1%
R2,4,6,7
R1,5,10
C6,7
D1
0 Ohm
Not Used
Not Used
Not Used
J1,J2
JP1,JP2
JU1
Socket
Scope probe
Wire Connect
2-Pin Header
131-5031-00
ED1973-ND
S1012-02-ND
Tektronix
Digi-Key
Digi-Key
Terminal
Terminal
Rev1.0
4/29/2005
5
IRDC3637EVAL
TYPICAL OPERATING WAVEFORMS
Test Conditions:
Vcc=Vin=5V, Vc=12V, Vout=1.8V, Iout=0-7A, Ta=Room Temp, No Air Flow.
Unless otherwise specified.
Figure 5 - Start up waveforms
Ch1: Vin=Vcc, Ch2: Vc, Ch3: Vss, Ch4: Vout
Figure 4 - Start up waveforms
Ch1: Vin=Vcc, Ch2: Vc, Ch3: Vss, Ch4: Vout
Figure 7 - Gates waveforms
Ch1: Hdrv, Ch2Ldrv,, Ch3:Inductor Point
ILoad=5A
Figure 6 - Gates waveforms
Ch1: Hdrv, Ch2Ldrv,, Ch4:Inductor Current
ILoad=5A
Rev1.0
4/29/2005
6
IRDC3637EVAL
TYPICAL OPERATING WAVEFORMS
Test Conditions:
Vcc=Vin=5V, Vc=12V, Vout=1.8V, Iout=0-7A, Ta=Room Temp, No Air Flow.
Unless otherwise specified.
Figure 8 - Shutdown by shorting the SS pin
Figure 9 - Output Voltage Ripple
Ch1: Hdrv, Ch2Ldrv,, Ch3:SS
Ch1: Vout, Ch4: Inductor Current
ILoad=5A
ILoad=5A
Figure 10 - Load Transient (0-5A)
Ch1: Vout, Ch4: Step Load Current
Figure 11 - Load Transient (5-0A)
Ch1: Vout, Ch4: Step Load Current
Rev1.0
4/29/2005
IRDC3637EVAL
TYPICAL PERFORMANMCE CURVES
Test Conditions:
Vcc=Vin=5V, Vc=12V, Vout=1.8V, Iout=0-7A, Ta=Room Temp, No Air Flow.
Unless otherwise specified.
Efficiency
Vc=12V, Vcc=Vbus=5V, Iout=0-8A, Fs=400KHz
100
90
80
70
60
50
40
30
20
10
0
0
1
2
3
4
5
6
7
8
9
Iout (A)
Figure 12 - Efficiency using IRF8910 Dual MOSFET
This product has been designed and qualified for the Industrial market.
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 specification subject to change without notice. 02/01
Rev1.0
4/29/2005
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