LTC4261 LINER [Linear Technology], LTC4261 Datasheet - Page 12

• Manufacturer Part Number: LTC4261
• Description: Negative Voltage Hot Swap Controllers with ADC and I2C Monitoring
• Manufacturer: LINER [Linear Technology]

LTC4261/LTC4261-2
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.
APPLICATIONS INFORMATION
12
ENABLE A
ENABLE B
RTN A
RTN B
–48V A
–48V B
–48V INPUT
–48V RTN
UV = 38.5V
UV RELEASE
AT 43V
OV = 72.3V
OV RELEASE
AT 71V
BACKPLANE
Figure 2a. 200W AdvancedTCA Hot Swap Controller with Input/Output Monitoring
and Power Good Watchdog Using LTC4261 in I
C
100nF
UV
PLUG-IN
CARD
Figure 1. –48V/200W Hot Swap Controller Using LTC4261 with Current,
Input Voltage and V
R1
11.8k
1%
R3
453k
1%
R2
16.9k
1%
0.1µF
7A
7A
C
VCC
V
R10
100k
C
1µF
EE
IN
10A
10A
R12
10k
LTC4354
R11
100k
R13
10k
C
47nF
10k 1%
TMR
C
220nF
R10
SS
Q9
2N5401
R14
100k
1N4148
HZS5C1
DS
×2
Monitoring (5.6A Current Limit, 0.66A Inrush)
10
11
19
20
26
25
24
8
9
2
Q10
2N5401
R15
100k
UV TURN OFF = 34.2V
OV TURN OFF = 74.8V
UV RELEASE = 37.5V
OV RELEASE = 73.2V
UVL
UVH
ADIN2
OV
SS
TMR
EN
ON
ADR1
ADRO
MBRM5100
MBRM5100
C
33nF
F
R16
100k
V
EE
100nF
13
C
0.008Ω
INTV
G
C
1%
R
UV
47nF
S
C
1µF
EN
SENSE
7
CC
14
LTC4261CGN
10Ω
Input Power Supply
Power for the LTC4261/LTC4261-2 is derived from the
–48V RTN through an external current limiting resistor
(R
R
IRF1310NS
G
GATE
R1
10.5k
1%
IN
V
R3
412k
1%
R
604Ω
1%
R2
19.1k
1%
Q1
V
IN
2
H
EE
15
21
C Mode (Part One)
R
4× 1k IN SERIES
1/4W EACH
) to the V
IN
DRAIN
330nF
C
TMR
16
C
330nF
R
1M
SS
D
RAMP
18
R
1k
ALERT
F
FLTIN
SDAO
C
10nF
100V
5%
PGIO 28 PWRGD2
ADIN
SDAI
SCL
R
IN
PGI
PG
10
11
19
20
26
25
24
8
9
2
pin. An internal shunt regulator clamps
22
1
6
5
4
3
27 PWRGD1
23
UVL
UVH
ADIN2
OV
SS
TMR
EN
ON
ADR1
ADR0
C
33nF
F
V
EE
13
C
0.008Ω
G
V
5%
R
OUT
47nF
S
SENSE
ON
MODULE2
14
LTC4261CGN
10Ω
V
V
R
IRF1310NS
IN
IN
402k 1%
G
+
–
GATE
R11
Q1
15
DRAIN
MODULE1
ON
V
V
16
IN
IN
R
1M
D
+
–
42612 F01
RAMP
+
18
R
1k
F
42612 F02a
C
10nF
100V
5%
R
C
330µF
100V
L
A
B
42612fb