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XRP7708 Datasheet(PDF) 6 Page - Exar Corporation |
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XRP7708 Datasheet(HTML) 6 Page - Exar Corporation |
6 / 27 page X XR RP P7 77 70 08 8 Q Qu ua ad d C Ch ha an nn ne ell D Diig giitta all P PW WM M S Stte ep p D Do ow wn n C Co on nttrro olllle err © 2010 Exar Corporation 6/27 Rev. 1.0.3 PIN ASSIGNMENT Fig. 3: XRP7708 Pin Assignment PIN DESCRIPTION Name Pin Number Description VIN1 39 Power source for the internal linear regulators to generate VCCA, VDD and the Standby LDO (LDOOUT). Place a decoupling capacitor close to the controller IC. Also used in UVLO1 fault generation – if VIN1 falls below the user programmed limit, all channels are shut down. The VIN1 pin needs to be tied to VIN2 on the board with a short trace. VIN2 38 If the Vin2 pin voltage falls below the user programmed UVLO VIN2 level all channels are shut down. The VIN2 pin needs to be tied to VIN1 on the board with a short trace. VCCA 37 Output of the internal 5V LDO. This voltage is internally used to power analog blocks. Note that a compensation capacitor should be used on this pin (see application note). VCCD 26 Gate Drive input voltage. This is not an output voltage. This pin can be connected to VCCA to provide power for the Gate Drive. VCCD should be connected to VCCA with the shortest possible trace and decouple with a minimum 1µF capacitor. Alternatively, VCCD could be connected to an external supply (not greater than 5V). PGND1- PGND4 36,31,16,21 Power Ground. Ground connection for the low side gate driver. AVDD 1 Output of the internal 1.8V LDO. A decoupling capacitor should be placed between AVDD and AGND close to the chip (with short traces). |
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