ATX2005 Datasheet. Www.s Manuals.com. R1.0 Atx
User Manual: Datasheets ATX2005.
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Translated from chinese by: Esquiloesperto (Messias-BH.) ATX 2005 POWER SUPPLY PWM SUPERVISOR Power Supply Pulse Width Modulation Integrated Circuit Controller Specs (English version) version 1.0 April, 2012 Original chinese document downloaded from: http://www.4shared.com/office/_E8A5czR/ATX_2005.html ATX 2005 Specification: v-1.0 Page 02 General Description The integrated circuit ATX-2005 is a pulse width modulation (PWM) controller, which can be used in the power supplies' secondary side, ready to provide the total voltage and load switching control. ATX-2005 has all inside functions for protection and control, undervoltage/overvoltage detection, output voltage status monitor (PG), external remote control (REM)... and more. The ATX-2005 is able to set the power supply's behavior in order to reduce the external devices usage to get required control. The undervoltage (UVP) and overvoltage (OVP) modules assist the 3.3V, 5V, and 12V voltage levels. The PP function is set to monitor power and negative voltages, and a built-in shunt regulator module (the 431 shunt regulator) is built to make the PWM's correct level control, providing a stable output voltage through a group of amplifiers that monitor the feedback pattern. Besides, the antinoise filter prevents malfunction caused by outer interference. Features • 3.3V / 5V e 12V Overvoltage Protection • 3.3V / 5V / 12V Undervoltage Protection • 3.3V / 5V / 12V Undervoltage Detection • PP: Overcharge and Negative voltage protection • Pulse Width Modulation (PWM) control device • "Soft-Start" improvement, using external capacitor to perform easy quick start • RI – External resistor to settle down the internal reference current, noise immunity and delay time protection • PG-Shifter: monitor the normal voltage condition test • Undervoltage Protection (UVP): noise reduction function added • Overvoltage Protection (OVP): noise reduction function added • Undervoltage Protection (UVP): 250ms delay time function • Remote switching control (REM): noise reduction function added • Built-in shunt regulator to provide stable output voltage (431 Shunt Regulator) • Package type: 16-Pins Dual In-line Package (DIP-16) Pin Assignment ATX 2005 Specification: v-1.0 Page 03 Pinning Pin Symbol Function Description 1 VCC Source Positive power source input 2 REM Input Remote switch on/off signal (low: On / high: Off) 3 V3.3 Input 3,3V voltage monitor 4 V5 Input 5V voltage monitor 5 PP Input Power/ Negative voltage protection input 6 V12 Input 12V voltage monitor 7 O1 Output Open collector output driver #1 8 O2 Output Open collector output driver #2 9 PG Output "Power Good" status sensor input 10 FB Output Shunt (shunt regulator) output 11 VREF Input Shunt (shunt regulator) input 12 GND Ground Negative power source input 13 COMP Output Compensation OpAmp output – Duty Cycle Control 14 NEG Input Compensation OpAmp negative input – Negative Feedback Sensor 15 SS Input Compensation OpAmp positive input – Soft-start Capacitor pin 16 RI Input External connection of a resistor to set the internal reference current value, this feature can also adjust the internal noise immunity and protection delay time Limiting Values Item Supply voltage Power dissaption Operating temperature Storage temperature Symbol Conditions Min. Typ. Max. Unit VCC 4,5 5 5,5 V Pd -- 1000 -- mW -10 -- +70 °C -65 -- +150 °C ATX 2005 Specification: v-1.0 Page 04 Electrical Characteristics TA temperature = 25 °C, main voltage VCC = 5V Voltage protection levels (V33, V5, V12, PP) Item Overvoltage • Protection Undervoltage • Protection Undervoltage • Detection Undervoltage • Delay Time Symbol Conditions Min. Typ. Max. Unit V33 V5 V12 PP V33 V5 V12 V33 V5 V12 PG low PG low PG low PG low PG low PG low PG low PG low PG low PG low 3.9 5.6 13.4 2.3 2.0 3.0 5.9 2.6 4.1 9.6 4.1 6.0 14.0 2.6 2.4 3.6 7.1 2.9 4.45 10.3 4.4 6.4 14.4 2.8 ---3.1 4.7 10.7 V V V V V V V V V V Td1 Remon On/Off 150 250 350 ms Start Switch – On/Off (REM) Item High Level Input Voltage Low Level Input Voltage REMOTE Delay Time REMOTE OFF Delay Time Symbol Conditions Min. VIH --- 1.8 VIL --- tdb-rem --- tdb-remoff --- 22 Typ. Max. Unit V 28 0.8 V 34 ms 4 ms Pulse Width Modulation (PWM) Output 1, 2 (O1, O2) Item Leakage Current Duty Cycle (máx.) Symbol Conditions Min. Typ. Max. Unit ILEAKAGE Output = 5v -- 5 -- uA DCmax Duty cycle (max.) 84 -- 93 ﹪ Symbol Conditions Min. Typ. Max. Unit IPGL PG=5V -- -- 2 uA Td -- 100 220 400 ms VOL IPGO=10mA -- 0.2 0.4 V Power Good Sensor (PG) Item PG – Leakage Current PG – Delay Delay Time Output Voltage Low level ATX 2005 Specification: v-1.0 Page 05 Shunt Regulator (VREF FB) Item Reference voltage for Shunt Reg. Output Sink Current Symbol Conditions Min. Typ. Max. Unit VREF IFB = 0.5mA 2.45 2.50 2.55 V IOUT VFB > 3V 10 -- -- mA Op-amp OP (COMP NEG, e SS) Item Min. Typ. Max. Unit Symbol Conditions -- 0.5V~3.5V -- 0 dB Item Symbol Conditions Min. Typ. Max. Unit Soft Start charge current ICH RI=75KΩ 8.0 9.5 11.0 µA Close Loop Voltage gain Cross over crossing point -- 65 -- 310 -- dB -- KHZ Soft-start (SS,RI) Reference: Internal Control Circuit Diagram ATX 2005 Specification: v-1.0 Page 06 Package Outline www.s-manuals.com
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