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ISL6255AHAZ Datasheet(PDF) 9 Page - Renesas Technology Corp |
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ISL6255AHAZ Datasheet(HTML) 9 Page - Renesas Technology Corp |
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9 / 22 page  ISL6255, ISL6255A FN9203 Rev 2.00 Page 9 of 22 May 23, 2006 DCIN The DCIN pin is the input of the internal 5V LDO. Connect it to the AC adapter output. Connect a 0.1µF ceramic capacitor from DCIN to CSON. ACSET ACSET is an AC adapter detection input. Connect to a resistor divider from the AC adapter output. ACPRN Open-drain output signals AC adapter is present. ACPRN pulls low when ACSET is higher than 1.26V; and pulled high when ACSET is lower than 1.26V. DCSET DCSET is a lower voltage adapter detection input (like aircraft power 15V).Allows the adapter to power the system where battery charging has been disabled. DCPRN Open-drain output signals DC adapter is present. DCPRN pulls low when DCSET is higher than 1.26V; and pulled high when DCSET is lower than 1.26V. EN EN is the Charge Enable input. Connecting EN to high enables the charge control function, connecting EN to low disables charging functions. Use with a thermistor to detect a hot battery and suspend charging. ICM ICM is the adapter current output. The output of this pin produces a voltage proportional to the adapter current. PGND PGND is the power ground. Connect PGND to the source of the low side MOSFET. VDD VDD is an internal LDO output to supply IC analog circuit. Connect a 1 F ceramic capacitor to ground. VDDP VDDP is the supply voltage for the low-side MOSFET gate driver. Connect a 4.7 resistor to VDD and a 1F ceramic capacitor to power ground. ICOMP ICOMP is a current loop error amplifier output. VCOMP VCOMP is a voltage loop amplifier output. CELLS This pin is used to select the battery voltage. CELLS = VDD for a 4S battery pack, CELLS = GND for a 3S battery pack, CELLS = Float for a 2S battery pack. VADJ VADJ adjusts battery regulation voltage. VADJ = VREF for 4.2V+5%/cell; VADJ = Floating for 4.2V/cell; VADJ = GND for 4.2V-5%/cell. Connect to a resistor divider to program the desired battery cell voltage between 4.2V-5% and 4.2V+5%. CHLIM CHLIM is the battery charge current limit set pin.CHLIM input voltage range is 0.1V to 3.6V. When CHLIM = 3.3V, the set point for CSOP-CSON is 165mV. The charger shuts down if CHLIM is forced below 88mV. ACLIM ACLIM is the adapter current limit set pin. ACLIM = VREF for 100mV, ACLIM = Floating for 75mV, and ACLIM = GND for 50mV. Connect a resistor divider to program the adapter current limit threshold between 50mV and 100mV. VREF VREF is a 2.39V reference output pin. It is internally compensated. Do not connect a decoupling capacitor. |
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