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TPS2346 Datasheet

  • TPS2346

  • OPTICAL NETWORK HOT SWAP POWER MANAGER

  • TI

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TPS2346
SLUS529 鈥?MAY 2002
OPTICAL NETWORK
HOT SWAP POWER MANAGER
FEATURES
D
Enables Hot Swap in High Availability Optical
D
D
D
D
D
D
D
D
D
D
D
D
Network Systems
Programmable Current Slew Rate
Power Supply Sequencing
Sense Resistors Set Peak Current (IMAX)
Overcurrent Circuit Breaker at 2脳 IMAX
Precharge Output
Logic Low Power Good Output
Logic Low Enable Input
On-Chip Charge Pump
Low Sleep Mode Current
Undervoltage Lockout (UVLO)
Minimal External Parts Count
24-pin TSSOP Package
DESCRIPTION
The TPS2346 Optical Network Hot Swap Power
Manager (HSPM) provides highly-integrated supply
control of three positive (3.3-V, 5-V, and 5.15-V) and one
negative (鈥?.2-V) supply rails with a minimum number
of external components. A linear current amplifier (LCA)
in each of the four device channels provides
closed-loop control of load current during insertion and
extraction events. This allows the designer to configure
the plug-in card鈥檚 maximum inrush slew rate and
magnitude according to the requirements of the system
supplies.
APPLICATIONS
D
Hot Swap of ONET Modules
D
Supply Power-Up/Power-Down Sequencing
TYPICAL APPLICATION
R1
5.15V
3 m鈩?/div>
5V
R6
10 k鈩?/div>
R7
1.2 k鈩?/div>
R2
2 m鈩?/div>
Q2
5V
D1
6.8 V
C1
0.1
碌F
ENABLE
PG
GND
C2
0.39
碌F
D2 6.8 V
BACKPLANE
3.3 V
R4
0.2
鈩?/div>
鈥?.2 V
R8
10
鈩?/div>
AD[00]
AD[XX:01]
ADDRESS/DATA BUS
Q1
PLUG鈥揑N MODULE
5.15 V
VIN1
CS1 GATE1
VS1
VIN2
CS2
GATE2
VS2
CPUMP
BACK鈥揈ND
POWER PLANES
3.3 V
鈥?.2 V
C3
0.1
碌F
ENABLE
PG
RGND
IRAMP
PRECHG
VIN4
CS4 GATE4
VS4
VIN3
CS3
TPS2346
AGND
CPGND
VS3
GATE3
R5
10 k鈩?/div>
Q4
R3
2 m鈩?/div>
Q3
RP
BRIDGE DEVICE
EXAMPLE SIGNAL LINE
AD[00]
AD[XX:01]
UDG鈥?2080
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
錚?/div>
2002, Texas Instruments Incorporated
www.ti.com
1

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