Rainbow-electronics DS2715 User Manual

1 of 12 042605 DESCRIPTION The DS2715 is well suited for cost-sensitive charger applications where the battery is either internal or in a u

DS2715: NiMH Cell Pack Charge Controller 10 of 12 CURRENT REGULATION Three basic modes of charging operation are supported by the DS2715: Offline s

DS2715: NiMH Cell Pack Charge Controller 11 of 12 TEMPERATURE SENSE Accurate temperature sensing is needed to determine end of charge by dT/dt and t

DS2715: NiMH Cell Pack Charge Controller 12 of 12 LED1 and LED2 Outputs Open-drain outputs LED1 and LED2 pull low to indicate charge status. When in

DS2715: NiMH Cell Pack Charge Controller 2 of 12 ABSOLUTE MAXIMUM RATINGS* Voltage on VDD and VCH Pins with Respect to VSS -0.3V to +18V Volta

DS2715: NiMH Cell Pack Charge Controller 3 of 12 AC ELECTRICAL CHARACTERISTICS (4.5V £ VDD £ 16.5V, TA = 0°C to +70°C, unless otherwise noted.) PA

DS2715: NiMH Cell Pack Charge Controller 4 of 12 Note 1: Voltages relative to VSS. Note 2: Does not include current through VCH, RT, and DIV pins. N

DS2715: NiMH Cell Pack Charge Controller 5 of 12 Figure 1. BLOCK DIAGRAM State MachineChargeTimerRegulatorLED1VDDLED2UVLOOscillator+-Pre-ChargeLo

DS2715: NiMH Cell Pack Charge Controller 6 of 12 Figure 2. STATE DIAGRAM ResetStandby powerCheck Rt, set modeVch = Hi-ZLEDx = Hi-ZVDD > VUVLOPr

DS2715: NiMH Cell Pack Charge Controller 7 of 12 DETAILED DESCRIPTION Charge Cycle Overview The DS2715 regulates the charge of up to 10 NiMH cells

DS2715: NiMH Cell Pack Charge Controller 8 of 12 DONE state. If at any time during fast charge the voltage on VBATT exceeds 1.65V (VOPEN), the DS271

DS2715: NiMH Cell Pack Charge Controller 9 of 12 Figure 3. TYPICAL APPLICATION CIRCUIT FOR A 3-CELL STACK LED1VchVbattTHMDivSNS+SNS-VSSVSSRtCbias