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參數(shù)資料
| 型號： | RC1587 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Power Conversion for the Data Communications Market |
| 中文描述： | 電源轉(zhuǎn)換為數(shù)據(jù)通信市場 |
| 文件頁數(shù)： | 3/4頁 |
| 文件大?。?/td> | 333K |
| 代理商： | RC1587 |
APPLICATION BULLETIN
AB-28
REV. 1.0.0
3
An integrated version of the opto-coupler (H11A817A) and
secondary voltage reference (RC431A) is also available
(FOD2712).
In the following sections we dive into some details of the
conversion from 12V and 5V down to final electronic load
voltage.
FAN5092 Two-Phase Interleaved
Buck Converter
The FAN5092 step-down (buck) converter is ideal for data
communications applications. This IC is a two-phase inter-
leaved buck converter switching up to 1MHz per phase. The
application diagram illustrates conversion from 12Vdown to
3.3V in a 12V-only input voltage source environment. The
chip integrates the controller and the drivers on a single die.
The high frequency of operation is enabled by:
The monolithic approach of integrating controller and
drivers on board
A fast proprietary “l(fā)eading edge valley control”
architecture with 100ns of response time
The strongest drivers in the industry at 1
sink impedance for both high and low side driver of each
phase
of source and
Such combination of features, together with loss-less current
sensing via R
DSON
sense, allows for a very efficient delivery
of power with very small passive components leading to new
record levels of power density.
The application diagram of the IC is shown in Fig 8 for a
3.3V, 30A load. Optimum companions of the FAN5092 are
the Fairchild discrete DMOS FDB6035AL for high side pass
transistors Q1,2 and FDB6676S for low side synchronous
rectification transistors Q2,4.
Two FAN5092 can be paralleled by means of doubling the
above application and connecting together two pins (pin 26
and pin 15). This will allow handling of loads up to 120A.
Fig. 8. FAN5092 Application Circuit
+12V
+12V
+12V
+12V
+12V
+12V
3.3V
30A
R16
R17
ENABLE/SS
PWRGD
+12V
D1
D2
C2
C1
C3
R1
R4
R2
R7
R8
R3
A
1 2
3
4 5 6 7 8 9 10 11 12 13 14
28 2726 25 24 23 22 21 20 19 18 17 16 15
+5V
D3
C5
R5
Q1
Q3
Q4
L2
L3
X
C
OUT
C
IN
L1 (Optional)
U1
FAN5092
Q2
D3=8.2V
R6
C4
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| RC1587D33T_32 | 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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