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)： 46/64頁(yè)
文件大小： 1056K
代理商： 21103
36
Power Supply Solutions
AMD-K6
Processor Power Supply Design
21103G/0—February 1999
LINFINTY
LX1664 and LX1665
The LX1664 and LX1665 are dual-output controllers that
combine a programmable switch-mode controller with a linear
regulator driver. The linear section is adjustable and can supply
5 A–7 A. The switch mode section uses a modulated constant
off-time architecture with adaptive voltage positioning to
achieve optimal transient response. The circuit offers
pulse-by-pulse current limiting, short-circuit protection, and
the LX1665 offers a power-good output and a crowbar driver for
over-voltage protection. An input inductor is recommended to
reduce ripple on the 5 V input. The internal 5-bit DAC provides
an adjustable output of 1.3 V to 3.5V. The circuit shown in
Figure 19 on page 37 can deliver more than 15 A, dependent on
choice of FETs and current limit set-point. The efficiency of this
circuit is around 85–90%, depending on the choice of
components. Table 12 shows the bill of materials for the
LX1664.
Contact Information
LINFINITY Microelectronics
11861 Western Avenue
Garden Grove, CA 92841
Tel: (714) 372-8383 Fax: (714) 372-3566
www.linfinity.com
Table 12. LINFINITY LX1664 Bill Of Materials
Reference
Description
Mechanical
Part Number
LX1665
IRL3303S
IRLZ44
-
Manufacturer
LINFINITY
International Rectifier
International Rectifier
-
U1
Q1, Q2
Q4
L1
Dual output PWM controller
MOSFET, 26 m
, 24 A
MOSFET
Inductor,
5 μH
Capacitor, Al-Elec, 1000 μF, 6.3
V, low ESR
Capacitor, Al-Elec, 330 μF,
6.3 V, low ESR
Capacitor, ceramic, 0.1 μF, X7R 0805
Capacitor, ceramic, 390pF, X7R 0805
Capacitor, ceramic, 680pF, X7R 0805
Capacitor, ceramic, 1 μF, Y5V
Resistor, 1k, 5%
Resistor, 10k, 1%
Resistor, 10k, 1%
Power Resistor, 5 m
1 %
SO-18 [LX1664 is SO-16]
TO-263 or TO-220
TO-220
Thru-hole
C1, C2
Radial, 8x20mm
6MV1000GX
Sanyo
C7
Radial, 8x20mm
6MV330GX
Sanyo
C3
C4, C6
C8
C5
R3, R4
R6
R6
R1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1206
0805
0805
0805
OARS-1
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