DS2715KLINEAR Maxim Integrated, DS2715KLINEAR Datasheet - Page 2

• Manufacturer Part Number: DS2715KLINEAR
• Description: Power Management IC Development Tools
• Manufacturer: Maxim Integrated
• Series: DS2715r

CELL STACK SIZE ADJUSTMENT
R4 and R11 form a voltage divider such that the voltage of a single cell is present on the Vbatt pin. This is required
for proper operation of the kit. Adjust R4 as follows for the desired cell stack size:
The default value for R4 is 200KΩ allowing the demo kit to charge 3 cell stacks.
CHARGE RATE ADJUSTMENT
The charge rate is determined by the external sense resistor R18 connected between the SNS+ and SNS- pins.
The DS2715 will regulate the charge current to maintain a voltage drop of 121mV typical (107mV typical in
comparator mode) across the sense resistor during fast charge. The charge rate can therefore be selected by:
The default value for R18 is 0.25Ω giving a charge rate of ~484mA in the linear mode kit or 0.1Ω giving a charge
rate of ~1.07A for the switch mode kit.
CHARGE TIME AND TOP-OFF TIME ADJUSTMENT
Charge time and top-off time are controlled by the external resistor R16 from the R
selected to support fast-charge time-out periods of 0.5 to 6 hours and top-off charge time-out periods of 0.25 to 3
hours. The programmed charge time approximately follows the equation:
The default value for R16 is 86KΩ giving a charge time out of ~130 minutes in the linear mode kit or 47KΩ giving a
charge time out of ~70 minutes for the switch mode kit.
DS2715 EV KIT SCHEMATIC
R = (Cell Stack Size -1) * 100KΩ
Linear Mode:
Comparator Mode:
t = 1.5 x R/1000
R = 121mV / Desired Fast Charge Current
R = 107mV / Desired Fast Charge Current
(time in minutes)
2 of 3
T
pin to V
SS
. Resistors can be