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LTC4255CG Datasheet

  • LTC4255CG

  • Quad Network Power Controller with I2C Compatible Interface

  • 16頁

  • LINER

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LTC4255
Quad Network Power
Controller with I
2
C Compatible Interface
FEATURES
s
s
DESCRIPTIO
s
s
s
s
s
s
Controls Four Independent 鈥?8V Power Channels
Each Channel has Separate Relay Drivers, ON/OFF
Control, Short-Circuit Protection with Current
Foldback, Open-Circuit Detection, and Power Good
Indication
Programmed via I
2
C
TM
Compatible Interface
Five Bit Programmable Digital Address Allows
Control of up to 32 LTC4255s (128 Channels)
Interrupt on FAULT Output can be used to Eliminate
Software Polling
Programmable Current Limit and Open-Circuit
Duration Periods
Programmable Latchoff or Autoretry after Short-
Circuit Faults
Programmable Autoretry Duty Cycle
The LTC
廬
4255 is a quad 鈥?8V network power controller
with independent relay drivers and I
2
C compatible inter-
face. Each channel can be turned on and off via software
control, while providing short-circuit protection, open-
circuit detection, and power good indication. The short-
circuit protection includes a current foldback feature to
reduce power dissipation in the switch during shorts and
start-up.
The serial interface allows up to 128 channels to be
controlled with only two digital lines. A FAULT output can
be used as an interrupt line to eliminate fault detection by
software polling.
External switches and current sense resistors allow easy
scaling of current and power dissipation levels and pro-
vide the maximum protection against voltage and current
spikes.
The LTC4255 is available in the 28-pin SSOP package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
I
2
C is a trademark of Philips Electronics N.V.
APPLICATIO S
s
s
IP Phone Systems
DTE Power Distribution
TYPICAL APPLICATIO
12V
0.1碌F
V
CC
SCL
SDA
FAULT
AD0
AD1
AD2
AD3
AD4
DGND AGND
V
EE
SENSE1 GATE1
RELAY3
RELAY4
OUT1 SENSE2 GATE2 OUT2 SENSE3 GATE3 OUT3 SENSE4 GATE4 OUT4
100k
Q1
R
S2
0.33鈩?/div>
Q2
R
S3
0.33鈩?/div>
Q3
Q1, Q2, Q3, Q4: FDC3612
RELAYS: V23079 SERIES
R
S4
0.33鈩?/div>
4255 TA01
LTC4255
鈥?8V
R
S1
0.1碌F 0.33鈩?/div>
100k
100k
Q4
4255f
U
RELAY1
RELAY2
100k
U
U
1

LTC4255CG 產(chǎn)品屬性

  • LTC4255

  • 47

  • 集成電路 (IC)

  • PMIC - 電源控制器，監(jiān)視器

  • -

  • 網(wǎng)絡(luò)電源控制器

  • -

  • 10.8 V ~ 13.2 V

  • 10mA

  • 0°C ~ 70°C

  • 表面貼裝

  • 28-SSOP（0.209"，5.30mm 寬）

  • 28-SSOP

  • 管件

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