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NCP1800DM42R2 Datasheet(PDF) 2 Page - ON Semiconductor |
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NCP1800DM42R2 Datasheet(HTML) 2 Page - ON Semiconductor |
2 / 14 page NCP1800 http://onsemi.com 2 EOC Detect Pre CHG Complete VSNS Overvoltage GND COMP/DIS CFLG RISEL ISEL VCC ISNS EOC REF Input UV Lockout Input OV Lockout IREF OUT Figure 2. NCP1800 Internal Block Diagram VSNS CC CV VREF Chip Enable VREF VREF VREF VREF VREF LOGIC Cin Active Pullup VREF RSNS Cout CONTROL PIN FUNCTION DESCRIPTIONS Pin Symbol Description 1 ISNS This is one of the inputs to the current regulator and the end-of-charge comparator. 2 ISEL A resistor from this pin to ground pin sets the full charging current regulation level. 3 COMP/DIS This is a multifunctional pin that is used for compensation and can be used to interrupt charge with an open drain/collector output from a microcontroller. When this pin is pulled to ground, the charge current is interrupted. 4 GND This is the ground pin of the IC. 5 VSNS This is an input that is used to sense battery voltage and is the other input to the current regulator. It also serves as the input to the battery overvoltage comparator. 6 CFLG An open drain output that indicates the battery charging status. 7 VCC This is a multifunctional pin that powers the device and senses for over and undervoltage conditions. 8 OUT This is a current source driver for the pass transistor. |
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