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LTC1647-3IGN Datasheet

  • LTC1647-3IGN

  • Dual Hot Swap Controllers

  • 20頁

  • LINER

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LTC1647-1/LTC1647-2/LTC1647-3
Dual Hot Swap Controllers
FEATURES
s
s
s
s
s
s
s
DESCRIPTIO
Allows Safe Board Insertion and Removal from a
Live Backplane
Programmable Electronic Circuit Breaker
FAULT Output Indication
Programmable Supply Voltage Power-Up Rate
High Side Drive for External MOSFET Switches
Controls Supply Voltages from 2.7V to 16.5V
Undervoltage Lockout
The LTC
廬
1647-1/LTC1647-2/LTC1647-3 are dual Hot
Swap
TM
controllers that permit a board to be safely in-
serted and removed from a live backplane.
Using external N-channel MOSFETs, the board supply
voltages can be ramped up at a programmable rate. A high
side switch driver controls the MOSFET gates for supply
voltages ranging from 2.7V to 16.5V. A programmable
electronic circuit breaker protects against overloads and
shorts. The ON pins are used to control board power or
clear a fault.
The LTC1647-1 is a dual Hot Swap controller with a
common V
CC
pin, separate ON pins and is available in an
SO-8 package. The LTC1647-2 is similar to the LTC1647-1
but combines a fault status flag with automatic retry at the
ON pins and is also available in the SO-8 package. The
LTC1647-3 has individual V
CC
pins, ON pins and FAULT
status pins for each channel and is available in a 16-lead
narrow SSOP package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
Hot Board Insertion
Electronic Circuit Breaker
Portable Computer Device Bays
Hot Plug Disk Drive
TYPICAL APPLICATIO
3.3V V
ID
SUPPLY
R1
0.1鈩?/div>
Q1
1/2 MMDF3N02HD
V
ID
Controller for Two Device Bays
DEVICE #1
CONNECTOR #1
R3**
R2
10鈩?/div>
+
C
LOAD
*
R4**
1394 PHY
AND/OR
USB PORT
8
1
ON1
ON2
2
3
4
SENSE 1
V
CC
ON1
ON2
GND
SENSE 2
7
6
GATE 1
C1
4.7nF
2.5V/DIV
LTC1647-1
*
GATE 2
5
R6
10鈩?/div>
C
LOAD
IS USER-SELECTED BASED
ON THE DEVICE REQUIREMENTS
** R3, R4, R7 AND R8 ARE OPTIONAL DISCHARGE
RESISTORS WHEN DEVICES ARE POWERED-OFF
Q1, Q2: ON SEMICONDUCTOR
C3
4.7nF
DEVICE #2
Q2
1/2 MMDF3N02HD
CONNECTOR #2
R5
0.1鈩?/div>
R7**
+
C
LOAD
*
R8**
1394 PHY
AND/OR
USB PORT
1647-1/2/3 TA01
U
ON/OFF Sequence
V
ON
V
GATE
V
OUT
5ms/DIV
1647-1/2/3 TA01a
U
U
1

LTC1647-3IGN 產品屬性

  • LTC1647-1/2/3

  • 100

  • 集成電路 (IC)

  • PMIC - 熱交換

  • -

  • 熱交換控制器

  • 通用

  • 無

  • -

  • 2.7 V ~ 16.5 V

  • -40°C ~ 85°C

  • 表面貼裝

  • 16-SSOP（0.154"，3.90mm 寬）

  • 16-SSOP

  • 管件

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