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NCP3020B Datasheet(PDF) 2 Page - ON Semiconductor |
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NCP3020B Datasheet(HTML) 2 Page - ON Semiconductor |
2 / 23 page NCP3020A, NCP3020B, NCV3020A, NCV3020B http://onsemi.com 2 GATE DRIVE LOGIC VC CLK/ DMAX/ SOFT START OOV BOOST CLAMP LEVEL SHIFT SAMPLE & HOLD VC HSDR LSDR GND − + − + − + VCC COMP FB REF RAMP OSCILLATOR BST VSW VCC Figure 2. NCP3020 Block Diagram INTERNAL BIAS ISET 1.5 V BST_CHRG THERMAL SD POR/STARTUP OTA PWM COMP OUV CURRENT LIMIT PIN FUNCTION DESCRIPTION Pin Pin Name Description 1 VCC The VCC pin is the main voltage supply input. It is also used in conjunction with the VSW pin to sense current in the high side MOSFET. 2 COMP The COMP pin connects to the output of the Operational Transconductance Amplifier (OTA) and the positive terminal of the PWM comparator. This pin is used in conjunction with the FB pin to compensate the voltage mode control feedback loop. 3 FB The FB pin is connected to the inverting input of the OTA. This pin is used in conjunction with the COMP pin to compensate the voltage mode control feedback loop. 4 GND Ground Pin 5 LSDR The LSDR pin is connected to the output of the low side driver which connects to the gate of the low side N−FET. It is also used to set the threshold of the current limit circuit (ISET) by connecting a resistor from LSDR to GND. 6 VSW The VSW pin is the return path for the high side driver. It is also used in conjunction with the VCC pin to sense current in the high side MOSFET. 7 HSDR The HSDR pin is connected to the output of the high side driver which connects to the gate of the high side N−FET. 8 BST The BST pin is the supply rail for the gate drivers. A capacitor must be connected between this pin and the VSW pin. |
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Similar Description - NCP3020B |
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