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UCC3818ADRG4 Datasheet(PDF) 4 Page - Texas Instruments |
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UCC3818ADRG4 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 31 page UCC2817A, UCC2818A UCC3817A, UCC3818A SLUS577C − SEPTEMBER, 2003 − REVISED MARCH 2009 4 www.ti.com ELECTRICAL CHARACTERISTICS TA = 0°C to 70°C for the UCC3817A and TA = −40°C to 85°C for the UCC2817A, TA = TJ, VCC = 12 V, RT = 22 kΩ, CT = 270 pF, (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Over Voltage Protection and Enable Section Over voltage reference VREF +0.48 VREF +0.50 VREF +0.52 V Hysteresis 300 500 600 mV Enable threshold 1.7 1.9 2.1 V Enable hysteresis 0.1 0.2 0.3 V Current Amplifier Section Input offset voltage VCM = 0 V, VCAOUT = 3 V −3.5 0 2.5 mV Input bias current VCM = 0 V, VCAOUT = 3 V −50 −100 nA Input offset current VCM = 0 V, VCAOUT = 3 V 25 100 nA Open loop gain VCM = 0 V, VCAOUT = 2 V to 5 V 90 dB Common-mode rejection ratio VCM = 0 V to 1.5 V, VCAOUT = 3 V 60 80 dB High-level output voltage IL = −120 µA 5.6 6.5 6.8 V Low-level output voltage IL = 1 mA 0.1 0.2 0.5 V Gain bandwidth product (1) 2.5 MHz Voltage Reference Section Input voltage TA = 0°C to 70°C 7.387 7.5 7.613 V Input voltage TA = −40°C to 85°C 7.369 7.5 7.631 V Load regulation IREF = 1 mA to 2 mA 0 10 mV Line regulation VCC = 10.8 V to 15 V(2) 0 10 mV Short-circuit current VREF = 0 V −20 −25 −50 mA Oscillator Section Initial accuracy TA = 25°C 85 100 115 kHz Voltage stability VCC = 10.8 V to 15 V −1 1 % Total variation Line, temp 80 120 kHz Ramp peak voltage 4.5 5 5.5 Ramp amplitude voltage (peak to peak) 3.5 4 4.5 V Peak Current Limit Section PKLMT reference voltage −15 15 mV PKLMT propagation delay 150 350 500 ns NOTES: 1. Ensured by design, not production tested. 2. Reference variation for VCC < 10.8 V is shown in Figure 8. |
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