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UC2849DW Fiches technique(PDF) 3 Page - Texas Instruments |
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UC2849DW Fiches technique(HTML) 3 Page - Texas Instruments |
3 / 21 page www.ti.com ELECTRICAL CHARACTERISTICS (1) UC2849 UC3849 SLUS360C – JULY 1995 – REVISED AUGUST 2007 RECOMMENDED OPERATING CONDITIONS (continued) MIN MAX UNIT Timing resistor (RT) 1 200 k Ω Timing capacitor (CT) 75 2000 pF Unless otherwise stated these specifications apply for TA = –40°C to 85°C for UC2849; and 0°C to 70°C for UC3849; VCC = 12 V, VEE = GND, Output no load, CT = 345 pF, RT = 4530Ω, RDEAD = 511Ω, RCLKSYN = 1 kΩ, TA = TJ. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Current Sense Amplifier Ib 0.5 3 μA TA = 25°C 3 VIO mV Over Temperature 5 Avo 60 90 dB GBW (2) Acl = 1, RIN = 1 kΩ, CC = 15 pF, f = 200 kHz (3) 4.5 7 MHz VOL IO = 1 mA, voltage above VEE 0.5 IO = 0 mA 3.8 V VOH IO = –1 mA 3.5 CMRR –0.2 < Vcm < 6.5 V 80 dB PSRR 10 V < VCC < 20 V 80 Current Error Amplifier Ib 0.5 3 μA VIO 3 20 mV Avo 60 90 dB GBW(2) Acl = 1, RIN = 1 kΩ, CC = 15 pF, f = 200 kHz (3) 4.5 7 MHz VOL IO = 1 mA, voltage above VEE 0.5 IO = 0 mA 3.8 V VOH IO = –1 mA 3.5 CMRR –0.1 < Vcm < 6.5 V 80 dB PSRR 10 V < VCC < 20 V 80 Voltage Error Amplifier Ib 0.5 3 μA VIO 2 5 mV Avo 60 90 dB GBW(2) f = 200 kHz 4.5 7 MHz VOL IO = 175 μA, voltage above VEE 0.3 0.6 V VOH ILIM > 3 V 2.85 3 3.15 VOH – ILIM Tested ILIM = 0.5 V, 1.0 V, 2.0 V –100 100 mV CMRR –0.1 < Vcm < 6.5 V 80 dB PSRR 10 V < VCC < 20 V 80 (1) Unless otherwise specified all voltages are with respect to GND. Currents are positive into, negative out of the specified terminal. (2) Ensured by design not 100% tested in production. (3) If a closed loop gain greater than 1 is used, the possible GBW will increase by a factor of ACL + 10; where ACL is the closed loop gain. 3 Submit Documentation Feedback |
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