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TPS2346PWRG4 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS2346PWRG4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 30 page TPS2346 SLUS529 – MAY 2002 OPTICAL NETWORK HOT SWAP POWER MANAGER 1 www.ti.com FEATURES D Enables Hot Swap in High Availability Optical Network Systems D Programmable Current Slew Rate D Power Supply Sequencing D Sense Resistors Set Peak Current (IMAX) D Overcurrent Circuit Breaker at 2× IMAX D Precharge Output D Logic Low Power Good Output D Logic Low Enable Input D On-Chip Charge Pump D Low Sleep Mode Current D Undervoltage Lockout (UVLO) D Minimal External Parts Count D 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 (–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. APPLICATIONS D Hot Swap of ONET Modules D Supply Power-Up/Power-Down Sequencing 5.15V 5V GND 3.3 V –5.2 V 5.15 V 5 V 3.3 V –5.2 V BRIDGE DEVICE AD[00] AD[XX:01] CS1 VIN1 ENABLE PG RGND VIN4 CS4 GATE1 VS1 VIN2 PRECHG CS2 GATE2 VS2 CPUMP CPGND VS3 GATE3 VIN3 IRAMP CS3 VS4 GATE4 TPS2346 AGND AD[00] AD[XX:01] ADDRESS/DATA BUS PLUG–IN MODULE Q1 Q2 Q3 Q4 EXAMPLE SIGNAL LINE D2 6.8 V D1 6.8 V RP ENABLE PG C2 0.39 µF C1 0.1 µF R2 2 m Ω C3 0.1 µF R3 2 m Ω R4 0.2 Ω R5 10 k Ω R1 3 m Ω R8 10 Ω UDG–02080 TYPICAL APPLICATION R6 10 k Ω R7 1.2 k Ω Copyright 2002, Texas Instruments Incorporated 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. |
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