DS2715 Datasheet | Dallas Semiconducotr

DESCRIPTION The DS2715 is well suited for cost-sensitive charger applications where the battery is either internal or in a unique battery pack. It has been optimized for safe reliable charging of 1 to10 Ni MH cells in series. The DS2715 has an internal gain block that can be selected as either a parator or transconductance amplifier for charge current regulation. The DS2715 is configurable as a switched DC charger, a linear current regulator, or a switchmode current source. The DS2715 pre-conditions severely depleted cells are pre-conditioned before entering full charge mode. The DS2715 terminates full charge using the d T/dt technique. It requires an external thermistor for d T/dt detection. Over-temperature, under-temperature, and over-voltage detection prevents charging under unsafe environmental conditions. A user selectable charge timer allows charge rates from 0.15C to 2C. Fast-charge, top-off and charge done modes are included for highly reliable, safe charging of Ni MH cells. Discharge mode allows the DS2715 to enter a low power sleep state while the cell pack is being discharged. PIN CONFIGURATION CBIAS CC1 VCH CC2 VSS LED1 LED1 VSS LED2 LED2 VSS CSOUT CTG VN1 CTG VN0 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 V BATT VP2 THM VP1 R T THM2 V DD THM1 SNSVDD SNS+ TMR DIV CTST MODE DMSEL 16 SO See Table 1 for Ordering Information. Table 1. ORDERING INFORMATION PART DS2715Z+ DS2715Z+T&R MARKING DS2715+ DS2715+ PIN-PACKAGE 16 SO 16 SO Tape-and-Reel FEATURES - - - - - - - - - Charges 1 to 10 Ni MH Cells Fast Charges up to a 2C Rate Pre-Charge and Top-Off Charge Modes Help Cell Conditioning Load Detection Allows the DS2715 to Enter Low Power Sleep Mode (Less than 10µA) while the Cell Pack is Discharged d T/dt Charge Termination Eliminates Cell Charge Stress Monitors Voltage, Temperature, and Time for Safety and Secondary Termination Regulates Current through Either Linear Control or Switch-Mode Control LED Outputs Display Charge State Small 16-Pin SO Package + Denotes...