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WT76018RT
The WT76018RT provides protection circuits, power good output (PGO), fault protection latch (FPOB), and a protection detector function (PSONB) control. It can minimize external components of switching power supply systems in personal computer. The Over Voltage Detector (OVD) monitors VX, V33, V5, V12A, V12B, V12C, V12D, V12E and V12F input voltage level. The Under Voltage Detector (UVD) monitors V33, V5, V12A, V12B, V12C, V12D, V12E, V12F input voltage level. The Over Current Detector (OCD) monitor I33&V33, I5&V5, I12A&V12A, I12B&V12B, I12C&V12C, I12D&V12D, I12E&V12E and I12F&V12F input current sense. The pin VX provides an extra protection function. When OVD or UVD or OCD or VX detect the fault voltage level, the FPOB is latched HIGH and PGO go low. The latch can be reset by PSONB go HIGH. There is 4 ms delay time for PSONB turn off FPOB. When OVD and UVD and OCD detect the right voltage level, the power good output (PGO) will be issue.
Features
- The Over Voltage Detector (OVD) monitors VX, V33, V5 and six channel 12V input voltage.
- The Under Voltage Detector (UVD) monitors V33, V5 and six channel 12V input voltage.
- The Over Current Detector (OCD) monitors I33&33, I5&V5 and six channel I12&V12 input pins.
- Six Channels for I12V&V12 OCD with auto calibration
- The VX > 1.2V provide an extra protection.
- Both of the power good output (PGO) and fault protection latch (FPOB) are Open Drain Output.
- 125 ms time delay for PGO.
- 20 ms for PSONB input signal De–bounce.
- 14 us for OVD internal signal De–bounce.
- 3 ms for UVD / VX internal signal De–bounce.
- 30 ms for OCD internal signal De–bounce.
- 73 us for PGI internal signal De–bounce.
- 4 ms for PSONB turn-off FPOB
- Short-circuit turn-on protection
– 75 ms delay to enable UV/OC/VX detection, depends on PGI condition
option:
– Enable UV/OC/VX detection when PGI>1.2V
– Disable UV/OC/VX detection when PGI<1.2V
option:
– Enable UV/OC/VX detection when PGI>0.65V at power on mode
– Disable UV/OC/VX detection when PGI<0.65V at power on mode
– Enable UV/OC/VX detection when PGI>1.2V at normal mode
– Disable UV/OC/VX detection when PGI<1.2V at normal mod
- Package Type: SOP-24
- The Over Voltage Detector (OVD) monitors VX, V33, V5 and six channel 12V input voltage.
應用領域
