DS2715 ,NiMH Battery Pack Charge ControllerAPPLICATIONS Portable DVD Players Portable Television Sets Handheld Gaming Test Equipment Handheld ..
DS2715Z+ ,NiMH Battery Pack Charge ControllerAPPLICATIONS Portable DVD Players Portable Television Sets Handheld Gaming Test Equipment Handheld ..
DS2720 ,Efficient, Addressable Single-Cell Rechargeable Lithium Protection ICapplications including protecting the battery during charge, protection of the circuitfrom damage d ..
DS2726G+ ,5-Cell to 10-Cell Li+ Protector with Cell BalancingELECTRICAL CHARACTERISTICS(T = -20°C to +85°C.)APARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITSI Prot ..
DS2731E+ ,Cache-Memory Battery-Backup Management ICApplications+Denotes a lead(Pb)-free/RoHS-compliant package.T&R = Tape and reel.RAID Controller Car ..
DS2740B ,High-Precision Coulomb Counterapplications. Current is measured bidirectionally over a dynamic range of 15bits (DS2740U) or 13 bi ..
E53NA50 ,NABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitV Drain-source Voltage (V =0) 500 VDS GSV 500 VD ..
EA2-12 ,COMPACT AND LIGHTWEIGHTAPPLICATIONSElectronic switching systems, PBX, key telephone systems, automatic test equipment and ..
EA2-12NU ,COMPACT AND LIGHTWEIGHTFEATURESª Low power consumptionª Compact and light weightª 2 form c contact arrangementª Low magnet ..
EA2-12S ,COMPACT AND LIGHTWEIGHTFEATURESª Low power consumptionª Compact and light weightª 2 form c contact arrangementª Low magnet ..
EA2-12TNU ,COMPACT AND LIGHTWEIGHTAPPLICATIONSElectronic switching systems, PBX, key telephone systems, automatic test equipment and ..
EA2-4.5NU ,COMPACT AND LIGHTWEIGHTAPPLICATIONSElectronic switching systems, PBX, key telephone systems, automatic test equipment and ..
DS2715
NiMH Battery Pack Charge Controller
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 NiMH cells in series. The
DS2715 has an internal gain block that can be selected as either a comparator 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 dT/dt
technique. It requires an external thermistor for dT/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 NiMH cells. Discharge mode allows the DS2715 to enter a
low power sleep state while the cell pack is being discharged.
FEATURES ��Charges 1 to 10 NiMH 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
��dT/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
APPLICATIONS Portable DVD Players Portable Television Sets
Handheld Gaming Test Equipment
Handheld POS Terminals
PIN CONFIGURATION
Table 1. ORDERING INFORMATION + Denotes lead-free package.
OPERATIONAL DIAGRAM
DS2715
DS2715: NiMH Cell Pack Charge Controller
ABSOLUTE MAXIMUM RATINGS* Voltage on VDD and VCH Pins with Respect to VSS -0.3V to +18V
Voltage on LED1 and LED2 Pins -0.3V to +18V Voltage on SNS- -0.3V to +0.3V
Voltage on CBIAS -0.3V to 6V Voltage on all Other Pins -0.3V to VCbias
Continuous Sink Current VCH, LED1, and LED2 28mA Operating Temperature Range -20°C to +85°C
Storage Temperature Range -55°C to +125°C Soldering Temperature See IPC/JEDECJ-STD-020
*This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation
sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS (4.5V � VDD � 16.5V; TA = 0�C to +70�C.)
DC ELECTRICAL CHARACTERISTICS (4.5V � VDD � 16.5V, TA = 0�C to +70�C, unless otherwise noted.)
DS2715: NiMH Cell Pack Charge Controller
AC ELECTRICAL CHARACTERISTICS (4.5V � VDD � 16.5V, TA = 0�C to +70�C, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS: CHARGING (4.5V � VDD � 16.5V, TA = 0�C to +70�C, unless otherwise noted.)
DS2715: NiMH Cell Pack Charge Controller
Note 1: Voltages relative to VSS.
Note 2: Does not include current through VCH, RT, and DIV pins.
Note 3: Below this voltage no I/O pins are active.
Note 4: Does not include tolerance of RT resistor.
Note 5: VBIAS and resistor tolerances must be added to determine actual threshold.
Note 6: Specified temperature thresholds are only valid if recommended thermistor types are used.
Note 7: Specification is guaranteed by design.
DETAILED PIN DESCRIPTION
DS2715: NiMH Cell Pack Charge Controller
Figure 1. BLOCK DIAGRAM DS2715: NiMH Cell Pack Charge Controller
Figure 2. STATE DIAGRAM
