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TPS2346PWR PDF预览

TPS2346PWR

更新时间: 2024-11-14 13:02:39
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德州仪器 - TI /
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TPS2346PWR 数据手册

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SLUS529 – MAY 2002  
ꢌꢍ ꢀꢎ ꢇ ꢏꢐ  
ꢎ ꢍꢏ ꢒ ꢊꢌꢊꢓ ꢍꢏ  
DESCRIPTION  
FEATURES  
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 (–5.2-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’s maximum inrush slew rate and  
magnitude according to the requirements of the system  
supplies.  
D
Enables Hot Swap in High Availability Optical  
Network Systems  
D
D
D
D
D
D
D
D
D
D
D
D
Programmable Current Slew Rate  
Power Supply Sequencing  
Sense Resistors Set Peak Current (IMAX)  
Overcurrent Circuit Breaker at 2× IMAX  
Precharge Output  
Logic Low Power Good Output  
Logic Low Enable Input  
On-Chip Charge Pump  
Low Sleep Mode Current  
APPLICATIONS  
Undervoltage Lockout (UVLO)  
Minimal External Parts Count  
24-pin TSSOP Package  
D
Hot Swap of ONET Modules  
D
Supply Power-Up/Power-Down Sequencing  
TYPICAL APPLICATION  
R1  
Q1  
PLUG–IN MODULE  
5.15V  
5V  
5.15 V  
R2  
2 mΩ  
3 mΩ  
Q2  
5 V  
R6  
10 kΩ  
R7  
1.2 kΩ  
D1  
6.8 V  
CS1 GATE1 VS1  
VIN2 CS2  
C1  
0.1 µF  
VIN1  
GATE2  
VS2  
C3  
0.1 µF  
ENABLE  
PG  
ENABLE  
PG  
CPUMP  
AGND  
CPGND  
VS3  
RGND  
IRAMP  
TPS2346  
GND  
C2  
0.39 µF  
PRECHG  
VIN4  
GATE3  
D2 6.8 V  
CS4 GATE4 VS4  
VIN3 CS3  
3.3 V  
3.3 V  
Q3  
R3  
Q4  
R4  
0.2 Ω  
2 mΩ  
R5  
10 kΩ  
–5.2 V  
–5.2 V  
R8  
10 Ω  
R
BRIDGE DEVICE  
AD[00]  
P
EXAMPLE SIGNAL LINE  
AD[00]  
AD[XX:01]  
AD[XX:01]  
ADDRESS/DATA BUS  
UDG–02080  
ꢀꢡ  
Copyright 2002, Texas Instruments Incorporated  
ꢝ ꢡ ꢞ ꢝꢖ ꢗꢫ ꢙꢘ ꢜ ꢤꢤ ꢢꢜ ꢚ ꢜ ꢛ ꢡ ꢝ ꢡ ꢚ ꢞ ꢦ  
1
www.ti.com  

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