参数资料
型号: LTC4261IUFD#TR
厂商: Linear Technology
文件页数: 13/34页
文件大小: 361K
描述: IC CTRLR HOTSWAP W/ADC 24-QFN
标准包装: 2,500
类型: 热交换控制器
应用: 通用
内部开关:
电源电压: 9 V ~ 11.2 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 24-WFQFN 裸露焊盘
供应商设备封装: 24-QFN(5x4)
包装: 带卷 (TR)
LTC4261/LTC4261-2
13
42612fc
The LTC4261/LTC4261-2 are ideally suited for 48V
distributed power systems and AdvancedTCA systems.
A basic 200W application circuit using the LTC4261 is
shown in Figure 1. A more complete application circuit
with AdvancedTCA connections is shown in Figure 2.
Input Power Supply
Power for the LTC4261/LTC4261-2 is derived from the
48V RTN through an external current limiting resistor
(R
IN
) to the V
IN
 pin. An internal shunt regulator clamps
+
FLTIN
PGI
SCL
SDAI
SDAO
ALERT
PG
ADIN
8
9
10
11
19
20
26
2
25
24
22
1
6
5
4
3
27 PWRGD1
23
UVL
UVH
ADIN2
OV
SS
TMR
EN
ON
ADR1
ADRO
RAMP
DRAIN
GATE
LTC4261CGN
V
IN
INTV
CC
V
EE
SENSE
R
D
1M
R
IN
4 ?1k IN SERIES
1/4W EACH
R3
453k
1%
48V RTN
48V INPUT
UV = 38.5V
UV RELEASE
AT 43V
OV RELEASE
AT 71V
OV = 72.3V
R2
16.9k
1%
R1
11.8k
1%
C
R
10nF
100V
5%
C
F
33nF
C
TMR
47nF
C
SS
220nF
C
VCC
0.1礔
C
IN
1礔
C
UV
100nF
C
G
 47nF
R
S
0.008
1%
R
G
10
Q1
IRF1310NS
R11
402k 1%
R10
10k 1%
V
EE
R
F
1k
13
14
15
16
18
C
L
330礔
100V
21
7
MODULE2
ON
42612 F01
V
IN
+
V
IN

MODULE1
ON
V
IN
+
V
IN

V
OUT
PGIO  28 PWRGD2
Figure 1. 48V/200W Hot Swap Controller Using LTC4261 with Current,
Input Voltage and V
DS
 Monitoring (5.6A Current Limit, 0.66A Inrush)
Figure 2a. 200W AdvancedTCA Hot Swap Controller with Input/Output Monitoring
and Power Good Watchdog Using LTC4261 in I
2
C Mode (Part One)
8
9
10
11
19
20
26
2
25
24
R
D
1M
R
H
604
1%
R3
412k
1%
UV TURN OFF = 34.2V
UV RELEASE = 37.5V
OV TURN OFF = 74.8V
OV RELEASE = 73.2V
R2
19.1k
1%
R14
100k
R11
100k
R10
100k
RTN A
RTN B
ENABLE A
ENABLE B
48V A
48V B
R13
10k
R12
10k
MBRM5100
10A
10A
R15
100k
Q10
2N5401
R1
10.5k
1%
R16
100k
C
R
10nF
100V
5%
C
F
33nF
C
TMR
330nF
C
SS
330nF
C
UV
100nF
1N4148
?
C
G
 47nF
R
S
0.008
5%
R
G
10
Q1
IRF1310NS
V
EE
R
F
1k
13
14
15
16
18
42612 F02a
C
EN
1礔
HZS5C1
MBRM5100
Q9
2N5401
7A
LTC4354
PLUG-IN
CARD
7A
BACKPLANE
A
B
UVL
UVH
ADIN2
OV
SS
TMR
EN
ON
ADR1
ADR0
RAMP
DRAIN
GATE
LTC4261CGN
V
EE
SENSE
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