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ISL6253HAZ Datasheet(PDF) 9 Page - Intersil Corporation |
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ISL6253HAZ Datasheet(HTML) 9 Page - Intersil Corporation |
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9 / 22 page  9 PHASE The Phase connection pin connects to the high side MOSFET source, output inductor, and low side MOSFET drain. CSOP/CSON CSOP/CSON are the battery charging current sensing positive/negative inputs. The differential voltage across CSOP and CSON is used to sense the battery charging current, and is compared with the charging current limit threshold to regulate the charging current. The CSON pin is also used as the battery feedback voltage to perform voltage regulation. CSIP/CSIN CSIP/CSIN are the AC adapter current sensing positive/ negative inputs. The differential voltage across CSIP and CSIN is used to sense the AC adapter current, and is compared with the AC adapter current limit to regulate the AC adapter current. GND GND is an analog ground. DCIN The DCIN pin is the input of the internal 5V LDO. Connect it to the AC adapter output. Connect DCIN to a 0.1 µF ceramic capacitor. ACSET ACSET is an AC adapter detection input. Connect a resistor divider to an AC adapter. ACPRN ACPRN is an AC adapter present open drain output. ACPRN is active low when ACSET is higher than 1.26V; and active high when ACSET is lower than 1.26V. DCSET DCSET is a lower voltage adapter detection input (like aircraft power 15V). This allows power to the system, but power is not used to charge the battery. DCPRN DCPRN is a DC adapter present open drain output. DCPRN is active low when DCSET is higher than 1.26V; and active 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. 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 for the low side MOSFET gate driver. VDD VDD is an internal LDO output to supply the IC analog circuit. Connect a 1 µF ceramic capacitor to ground. VDDP VDDP is the supply voltage for the MOSFET gate driver. Connect a 4.7 Ω resistor to VDD and a 1µF ceramic capacitor to power ground. ICOMP ICOMP is a current loop error amplifier output. Connect a ceramic capacitor to ground. VCOMP VCOMP is a voltage loop amplifier output. Connect a ceramic capacitor in series with a resistor to ground. CELLS This pin is used to select the battery voltage. CELLS = VDD for a 4S battery, CELLS = GND for a 3S battery pack, and 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 from VREF 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 = VREF for 100mV, CHLIM = Floating for 65mV; CHLIM = GND for 30mV. Connect 3.3V for 127mV. Connect a resistor divider to program the charge current limit threshold between 30mV and 127mV. ACLIM ACLIM is the adapter current limit set pin. ACLIM = VREF for 103mV, ACLIM = Floating for 78mV, and ACLIM = GND for 53mV. Connect a resistor divider from VREF to program the adapter current limit threshold between 53mV and 103mV. VREF VREF is a reference output pin. Do not connect a decoupling capacitor. ISL6253 ISL6253 |
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