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TC4420IPA Datasheet(PDF) 8 Page - Microchip Technology |
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TC4420IPA Datasheet(HTML) 8 Page - Microchip Technology |
8 / 20 page TC4420/TC4429 DS21419C-page 8 2004 Microchip Technology Inc. 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE 3.1 Supply Input (VDD) The VDD input is the bias supply for the MOSFET driver and is rated for 4.5V to 18V with respect to the ground pins. The VDD input should be bypassed to ground with a local ceramic capacitor. The value of the capacitor should be chosen based on the capacitive load that is being driven. A minimum value of 1.0 µF is suggested. 3.2 Control Input The MOSFET driver input is a high-impedance, TTL/CMOS compatible input. The input circuitry of the TC4420/TC4429 MOSFET driver also has a “speed- up” capacitor. This helps to decrease the propagation delay times of the driver. Because of this, input signals with slow rising or falling edges should not be used, as this can result in double-pulsing of the MOSFET driver output. 3.3 CMOS Push-Pull Output The MOSFET driver output is a low-impedance, CMOS, push-pull style output capable of driving a capacitive load with 6.0A peak currents. The MOSFET driver output is capable of withstanding 1.5A peak reverse currents of either polarity. 3.4 Ground The ground pins are the return path for the bias current and the high peak currents that discharge the load capacitor. The ground pins should be tied into a ground plane or have very short traces to the bias supply source return. 3.5 Exposed Metal Pad The exposed metal pad of the 6x5 DFN package is not internally connected to any potential. Therefore, this pad can be connected to a ground plane or other copper plane on a printed circuit board (PCB) to aid in heat removal from the package. Pin No. 8-Pin CERDIP/ PDIP/SOIC Pin No. 8-Pin DFN Pin No. 5-Pin TO-220 Symbol Description 11 — VDD Supply input, 4.5V to 18V 2 2 1 INPUT Control input, TTL/CMOS compatible input 3 3 — NC No Connection 4 4 2 GND Ground 5 5 4 GND Ground 6 6 5 OUTPUT CMOS push-pull output 7 7 — OUTPUT CMOS push-pull output 88 3 VDD Supply input, 4.5V to 18V —PAD — NC Exposed Metal Pad —— TAB VDD Metal Tab is at the VDD Potential |
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