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
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Pin |
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Symbol |
Function |
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Description |
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1 |
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VCC |
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Source |
Positive power source input |
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2 |
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REM |
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Input |
Remote switch on/off signal (low: On / high: Off) |
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3 |
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V3.3 |
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Input |
3,3V voltage monitor |
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4 |
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V5 |
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Input |
5V voltage monitor |
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5 |
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PP |
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Input |
Power/ Negative voltage protection input |
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6 |
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V12 |
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Input |
12V voltage monitor |
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7 |
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O1 |
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Output |
Open collector output driver #1 |
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8 |
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O2 |
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Output |
Open collector output driver #2 |
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9 |
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PG |
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Output |
"Power Good" status sensor input |
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10 |
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FB |
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Output |
Shunt (shunt regulator) output |
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11 |
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VREF |
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Input |
Shunt (shunt regulator) input |
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12 |
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GND |
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Ground |
Negative power source input |
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13 |
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COMP |
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Output |
Compensation OpAmp output |
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– Duty Cycle Control |
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14 |
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NEG |
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Input |
Compensation OpAmp negative input |
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– Negative Feedback Sensor |
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15 |
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SS |
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Input |
Compensation OpAmp positive input |
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– Soft-start Capacitor pin |
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External connection of a resistor to set the internal |
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16 |
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RI |
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Input |
reference current value, this feature can also adjust |
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the internal noise immunity and protection delay time |
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Limiting Values |
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Item |
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Symbol |
Conditions |
Min. |
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Typ. |
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Max. |
Unit |
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Supply |
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VCC |
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4,5 |
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5 |
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5,5 |
V |
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voltage |
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Power |
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Pd |
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-- |
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1000 |
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-- |
mW |
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dissaption |
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Operating |
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-10 |
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-- |
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+70 |
°C |
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temperature |
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Storage |
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-65 |
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-- |
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+150 |
°C |
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temperature |
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