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UC3845BD1R2 Datasheet(PDF) 6 Page - ON Semiconductor |
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UC3845BD1R2 Datasheet(HTML) 6 Page - ON Semiconductor |
6 / 20 page UC3844B, UC3845B, UC2844B, UC2845B http://onsemi.com 6 −20 10 M 10 f, FREQUENCY (Hz) Gain Phase 0 30 60 90 120 150 180 100 1.0 k 10 k 100 k 1.0 M 0 20 40 60 80 100 0 VO, ERROR AMP OUTPUT VOLTAGE (VO) 0 0.2 0.4 0.6 0.8 1.0 1.2 2.0 4.0 6.0 8.0 TA = −55°C VCC = 15 V RL ≤ 0.1 W Figure 6. Error Amp Open Loop Gain and Phase versus Frequency Figure 7. Current Sense Input Threshold versus Error Amp Output Voltage Figure 8. Reference Voltage Change versus Source Current Figure 9. Reference Short Circuit Current versus Temperature −16 0 Iref, REFERENCE SOURCE CURRENT (mA) 20 40 60 80 100 120 −12 −8.0 −4.0 0 50 −55 TA, AMBIENT TEMPERATURE (°C) −25 0 25 50 75 100 125 70 90 110 −20 −24 TA = 125°C VCC = 15 V VO = 2.0 V to 4.0 V RL = 100 k TA = 25°C VCC = 15 V TA = 25°C 2.0 ms/DIV 2.0 ms/DIV VCC = 12 V to 25 V TA = 25°C VCC = 15 V IO = 1.0 mA to 20 mA TA = 25°C Figure 10. Reference Load Regulation Figure 11. Reference Line Regulation VCC = 15 V TA = 125°C TA = 25°C TA = −55°C |
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