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TPS3514N Datasheet(PDF) 1 Page - Texas Instruments |
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TPS3514N Datasheet(HTML) 1 Page - Texas Instruments |
1 / 16 page TPS3514 SLVS422A – JULY 2003 PC POWER-SUPPLY SUPERVISORS FEATURES D OVER-VOLTAGE PROTECTION AND LOCKOUT: 12V, 5V, and 3.3V Supplies D OVER-CURRENT PROTECTION AND LOCKOUT: 12V, 5V, and 3.3V Supplies D UNDER-VOLTAGE PROTECTION AND LOCKOUT: 12V Supplies D UNDER-VOLTAGE DETECT: 5V and 3.3V Supplies D FAULT-PROTECTION OUTPUT WITH OPEN–DRAIN OUTPUT STAGE D OPEN-DRAIN, POWER-GOOD OUTPUT SIGNAL: Monitors Power–Good Signal Input 3.3V and 5V Supplies D 300ms POWER-GOOD DELAY D 75ms DELAY: 5V, 3.3V Power-Supply Short-Circuit Turn-On Protection D 2.3ms PSON CONTROL TO FPO TURN–OFF DELAY D 38ms PSON CONTROL DEBOUNCE D WIDE SUPPLY VOLTAGE RANGE: 4.5V to 15V DESCRIPTION The TPS3514 is a PC switching power-supply system monitor with minimum external components. It provides under-voltage lockout (UVLO), over-voltage (OV), under-voltage (UV), over-current (OC), protection circuits, power-good indicator, and on/off control. UVLO thresholds are 4.45V (on) and 3.65V (off). Over-current protection (OCP) and over-voltage protection (OVP) monitor 3.3V, 5V, and 12V supplies. When an OC or OV condition is detected, the power–good output (PGO) is asserted LOW and the fault protection output (FPO) is latched HIGH. PSON from LOW-to-HIGH resets the latch. The OCP function will be enabled 75ms after PSON goes LOW with PGI HIGH and a debounce of typically 38ms. A built-in 2.3ms delay with 38ms debounce from PSON to FPO output is enabled at turn–off. An external resistor is connected between the RI pin and the GND pin. This will program a precise I(REF) for OCP function. The programmable I(REF) range is from 12.5µA to 62.5µA. Three OCP comparators and the I(REF) section are supplied by VS12. The current draw from the VS12 pin is less than 1mA. The power–good feature monitors PGI, the 3.3V and 5V supplies, and issues a power–good signal when the output is ready. The TPS3514 is characterized for operation from –40 °C to 85°C. The TPS3514 is available in DIP-14 and SO-14 packages. PGI GND FPO PSON IS12 RI NC PGO VDD VS5 VS33 VS12 IS33 IS5 5V 3.3V 12V TPS3514 560 Ω 56k Ω R2Ω R1Ω 470k Ω 1k Ω 820 Ω 1.5k Ω 0.01 Ω 0.01 Ω 0.01 Ω IO 5V VSB 12V 5V 3.3V 5V VSB PG From Transformer System Side Power Supply Output Side Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. www.ti.com All trademarks are the property of their respective owners. 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. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright 2002–2003, Texas Instruments Incorporated |
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