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參數資料
| 型號： | IRDC3637EVAL |
| 廠商： | International Rectifier |
| 英文描述： | IR3637 EVALUATION BOARD USER GUIDE |
| 中文描述： | IR3637評估板用戶指南 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 752K |
| 代理商： | IRDC3637EVAL |
Rev1.0
4/29/2005
IRDC3637EVAL
1
IR3637 EVALUATION BOARD USER GUIDE
DESCRIPTION
The IR3637 controller IC is designed to
provide a low cost synchronous Buck
regulator
for
on-board
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 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.
DC
to
DC
INPUT / OUTPUT CONNECTIONS
The following is the input / output connections:
Inputs:
JP1: Input (+5V) and GND
JU1: V
c
Outputs:
JP2: V
out
(+1.8V) and GND
Other Connections:
J1: Scope connection for V
out
J2: Scope connection for Inductor Point
SPECIFICATION DATA
V
c
= 12V
V
cc
=V
in
=5V
V
out
=1.8V
Iout =7A
Output Ripple = 50mV
F
s
= 400KHz
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.
The connection points are shown in
Figure1. Connect the power supply
cables
according
minimizing wire lengths to reduce
losses in the wire. Test points J1 and
J2
provide
easy
oscilloscope voltage probe to monitor
the inductor points and output voltage.
to
this
figure,
connection
for
PACKAGE INFORMATION
Fb
Vcc
LDrv
Gnd
HDrv
Vc
Comp
SS/SD
4
3
2
1
5
6
7
8
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