參數(shù)資料
型號(hào)： 21103
英文描述： AMD-K6 Processor Family Thermal Solutions Application Note AMD-K6 Processor Power Supply Design Application Note
中文描述： 的AMD - K6處理器系列散熱解決方案應(yīng)用指南的AMD - K6處理器電源設(shè)計(jì)應(yīng)用指南
文件頁(yè)數(shù)： 58/64頁(yè)
文件大小： 1056K
代理商： 21103
48
AMD-K6
Processor Power Supply Design
21103G/0—February 1999
Unisem
US3004
The US3004A controller shown in Figure 24 on page 50 is a
high-efficiency synchronous pulse width modulated (PWM)
controller that provides in excess of 16 A of output current. The
output voltage is selected by the 5-bit internal DAC. In addition,
the US3004A features two uncommitted linear controllers that
can provide a second regulated voltage of 3.3 V. The switcher
also employs current sensing by using the R
DS(ON)
of the
high-side power MOSFET as the sensing resistor. Other features
include a power-good signal, under-voltage lockout for both 5 V
and 12 V supplies, an external programmable soft-start
function, and use of an external capacitor for programming the
oscillator frequency. Table 18 shows the bill of materials for the
US2075.
Contact Information
Unisem Corp.
32C Mauchly
Irvine, CA 92618
Tel: (949) 453-1008 Fax: (949) 453-8748
www.unisem.com
Table 18. Unisem US3004 Bill of Materials
Reference
Description
Part Number
Manufacturer
Q1, Q2
MOSFET
IRL3103
IRL3103S (Note 1)
MTP3055VL
NDP603AL
1N4148
L=1
μ
H
Core:
L=4
μ
H R=2 m
6 MV1500GX, 1500 uF, 6.3 V,
220
μ
F, 6.3 V, ECAOJFQ221
680
μ
F, 10 V, EEUFA1A681L
0805Z105P250NT
1
μ
F, 25V, Z5U, SMT 0805
0805Z104P250NT
1
μ
F, 25V, Z5U, SMT 0805
IR
Q3
Q4
D1
L1
MOSFET
MOSFET
Diode, GP
Inductor
Motorola
National
Motorola
L2
Inductor
Micro Metal
C3, C10
C11
C9, C12, C13 Capacitor, Electrolytic
Capacitor, Electrolytic
Capacitor, Electrolytic
Sanyo
Panasonic
Panasonic
C2
Capacitor, Ceramic
Novacap
C4, C6
Capacitor, Ceramic
Novacap
Notes:
1) For the applications where it is desirable not to use the Heatsink, the IRL3103S MOSFET in the TO263 SMT package with
1 inch square of pad area using top and bottom layers of the board as a minimum is required.
2) R13 sets the Vcore, approximately 1% higher to account for the trace resistance drop.
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