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UC3844 数据表(PDF) 2 Page - E-Tech Electronics LTD |
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UC3844 数据表(HTML) 2 Page - E-Tech Electronics LTD |
2 / 6 page UC3844/45 LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 2 of 6 www.unisonic.com.tw QW-R103-010.E PIN CONFIGURATION PIN DESCRIPTION PIN NO PIN NAME FUNCTION 1 Compensation Error amplifier output, this pin is made available for loop compensation. 2 VFB Voltage Feedback, the inverting input of the Error Amplifier. It is normally connected to the switching power supply output through a resistor divider. 3 ISENSE A voltage proportional to inductor current is connected to this input. The PWM uses this information to terminate the output switch conduction. 4 RT/CT The Oscillator frequency and maximum output duty cycle are programmed by connecting resistor RT to Vref and capacitor CT to ground. Operation to 1 MHz is possible. 5 GND Power ground. 6 Output This output directly drives the gate of a power MOSFET. Peak currents up to 1A are sourced and sunk by this pin. The output switches at one-half the oscillator frequency. 7 VCC Positive supply. 8 VREF Reference output, provides charging current for capacitor CT though resistor RT. BLOCK DIAGRAM |
类似零件编号 - UC3844_45 |
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类似说明 - UC3844_45 |
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