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UCC2926DS Datasheet(PDF) 4 Page - Texas Instruments |
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UCC2926DS Datasheet(HTML) 4 Page - Texas Instruments |
4 / 9 page 4 UCC1926 UCC2926 UCC3926 GND: This pin is the return point for all device currents. INV: Negative input to the programmable amplifier to provide differential to single-ended signal conversion. NI: Positive input to the programmable amplifier to provide differential to single-ended signal conversion. OC: Overcurrent comparator output. When OUT is greater than OCREF, OC switches high. The OC comparator has a typical hysteresis of 25mV. OCREF: The reference pin of overcurrent comparator for setting overcurrent threshold voltage. OUT: Output of the programmable amplifier intended to provide differential to single-ended signal conversion of the transimpedance amplifier's outputs. Use this opamp to establish overall gain and nominal zero current reference voltage. This amplifier may be configured with a gain of one or more. Any non-common mode “chopping” noise between AOP and AON will show up at OUT. Some filtering of OUT may improve the appli- cation’s performance. SIGN: Sign comparator output. SIGN also controls the analog switches in the cross-switching block to keep AOP greater than AON. At currents near zero amps, the sign comparator may switch from “chopping” noise from the transimpedance amplifier. VDD: VDD is the power input connection for this device. Its input range is from 4.8V to 14V. Bypass to GND using good quality ceramic capacitors. PIN DESCRIPTIONS (cont.) 0 100 200 300 400 500 600 700 -20 -15 -10 -5 0 5 10 15 20 INPUT CURRENT [A] LIMITOFRESOLUTION (SIGN LIMIT THRESHOLD BAND) Figure 2. Differential output voltage (AOP-AON) vs. input current (IIN). TYPICAL CHARACTERISTICS CURVES 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 -75 -50 -25 0 25 50 75 100 125 TEMPERATURE [°C] Figure 3. Quiescent AOP, AON output voltage vs. temperature. 480 500 520 540 560 580 600 620 -75 -50 -25 0 25 50 75 100 125 TEMPERATURE [°C] VDD = 14V VDD = 12V VDD = 10V VDD = 4.8V IIN = 15A Figure 4. Differential output voltage (AOP - AON) vs. VDD and temperature. 0.800 0.900 1.000 1.100 1.200 1.300 1.400 1.500 1.600 1.700 1.800 -75 -50 -25 0 25 50 75 100 125 TEMPERATURE [°C] Figure 5. Typical shunt resistance vs. temperature. |
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