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AIC1340 Datasheet(PDF) 5 Page - Analog Intergrations Corporation |
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AIC1340 Datasheet(HTML) 5 Page - Analog Intergrations Corporation |
5 / 7 page AIC1340 5 n ELECTRICAL CHARACTERISTICS (Continued) PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT PWM CONTROLLER ERROR AMPLIFIER DC GAIN 76 dB Gain Bandwidth Product GBWP 11 MHz Slew Rate COMP1=10pF SR 6 V/ µS PWM CONTROLLER GATE DRIVER Upper Drive Source VCC=12V, VUGATE=11V RUGH 5.2 6.5 Ω Upper Drive Sink VCC=12V, VUGATE =1V RUGL 3.3 5 Ω Lower Drive Source VCC=12V, VLGATE=11V RLGH 4.1 6 Ω Lower Drive Sink VCC=12V, VLGATE=1V RLGL 3 5 Ω PROTECTION OCSET Current Source VOCSET=4.5VDC IOCSET 170 200 230 µA Soft-Start Current ISS 11 µA Chip Shutdown Soft Start Threshold 1.0 V n PIN DESCRIPTIONS Pin 1: PHASE: Over-current detection pin. Con- nect the PHASE pin to source of the external high-side N- MOSFET. This pin detects the voltage drop across the high-side N-MOSFET RDS(ON) for over- current protection. Pin 2: UGATE: External high-side N-MOSFET gate drive pin. Connect UGATE to gate of the external high-side N-MOSFET. Pin 3: SD: To shut down the system, active high or floating. Pin 4: VCC: The chip power supply pin. It also provides the gate bias charge for all the MOSFETs controlled by the IC. Recommended supply voltage is 12V. Pin 5: SS: Soft-start pin. Connect a capaci- tor from this pin to ground. This capacitor, along with an internal 10 µA (typically) current source, sets the soft-start interval of the converter. Pulling this pin low will shut down the IC. Pin 6: FB2: Connect this pin to a resistor di- vider to set the linear regulator output voltage. |
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