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UC2855AN Fiches technique(PDF) 2 Page - Texas Instruments |
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UC2855AN Fiches technique(HTML) 2 Page - Texas Instruments |
2 / 12 page 2 UC2855A/B UC3855A/B ABSOLUTE MAXIMUM RATINGS Supply Voltage VCC.......................... Internally Limited VCC Supply Clamp Current ....................... 20mA PFC Gate Driver Current (continuous) ..............± 0.5A PFC Gate Driver Current (peak) ...................± 1.5A ZVT Drive Current (continuous) ...................± 0.25A ZVT Drive Current (peak)........................± 0.75A I nput Current (IAC, RT, RVA) .......................5mA Analog Inputs (except Peak Limit) .............. −0.3 to 10V Peak Limit Input ........................... −0.3 to 6.5V Softstart Sinking Current ......................... 1.5mA Storage Temperature ................... −65°C to +150°C Junction Temperature ................... −55°C to +150°C Lead Temperature (Soldering, 10 sec.) ............. +300 °C Currents are positive into, negative out of the specified termi- nal. Consult Packaging Section of Databook for thermal limita- tions and considerations of packages. All voltages are referenced to GND. CONNECTION DIAGRAMS PLCC-20 & LCC-20 (Top View) Q or L Package DIL–20 (Top View) J or N Package SOIC-20 (Top View) DW Package ELECTRICAL CHARACTERISTICS:Unless otherwise specified: VCC = 18V, RT = 15k, RVS = 23k, CT = 470pF, CI = 150pF, VRMS = 1.5V, IAC = 100 µA, ISENSE = 0V, CAOUT = 4V, VAOUT= 3.5V, VSENSE = 3V. –40°C to 85°C (UC2855A/B), 0°C to 70 °C (UC3855A/B). PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Overall Supply Current, OFF CAO, VAOUT = 0V, VCC = UVLO −0.3V 150 500 µA Supply Current, OPERATING 17 25 mA VCC Turn-On Threshold UC3855A 15.5 17.5 V VCCTurn-Off Threshold UC3855A,B 9 10 V VCC Turn-On Threshold UC3855B 10.5 10.8 V VCC Clamp I(VCC) = ICC(on) + 5mA 18 20 22 V Voltage Amplifier Input Voltage 2.9 3.1 V VSENSE Bias Current −500 25 500 nA Open Loop Gain VOUT =2to5V 65 80 dB VOUT High ILOAD = –300µA 5.75 6 6.25 V VOUT Low ILOAD = 300µA 0.3 0.5 V Output Short Circuit Current VOUT = 0V 0.6 3 mA |
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