Rainbow-electronics DS2710 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics DS2710. Rainbow Electronics DS2710 User Manual Manual do Utilizador

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General Description
The DS2710 is ideal for in-system charging of single-cell
nickel metal hydride (NiMH) cells for low-current
portable applications. Inputs to the DS2710 include USB
voltage sources and 5V regulated adapters.
Temperature, voltage, and charge time are monitored to
provide proper fast-charging control algorithms for
single-cell NiMH or nickel cadmium (NiCd) batteries.
The DS2710 includes battery tests to detect defective or
inappropriate cells such as alkaline primary batteries.
Applications
Small Rechargeable Devices
Voice Recorders
Cordless Mouse
Battery-Powered Toys
Features
Charges Single-Cell NiMH Cells
Switch-Mode Topologies Supported by Hysteretic
Control Technique
Precharges Deeply Depleted Cells
Fast-Charges NiMH with -ΔV Termination
Sensitivity of 2mV (typ)
Monitors Voltage, Temperature, and Time for
Safety and Secondary Termination
Regulates Charge Current
Designed for External pMOS
Rail-to-Rail MOSFET Driver
Tiny 10-Pin TDFN Package (3mm x 4mm)
DS2710
Single-Cell NiMH Charger
________________________________________________________________
Maxim Integrated Products
1
DS2710
110
VP1V
SS
3 8 VN0V
DD
2 9 VN1CS
4 7 TMRTHM
5 6 CTESTSTATUS
TDFN
(3mm
×
4mm)
TOP VIEW
+
*EP
*EXPOSED PAD.
Pin Configuration
Ordering Information
DS2710
V
DD
VP1
THM
CS
VN0 VN1
SENSE
CHARGE
SOURCE
NiMH
CELL
GROUND
Typical Operating Circuit
Rev 0; 4/08
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
+
Denotes a lead-free/RoHS-compliant package.
T&R = Tape and reel.
*
EP = Exposed pad.
PART PIN-PACKAGE
DS2710G+ 10 TDFN-EP*
DS2710G+T&R 10 TDFN-EP*
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Resumo do Conteúdo

Página 1 - Single-Cell NiMH Charger

General DescriptionThe DS2710 is ideal for in-system charging of single-cellnickel metal hydride (NiMH) cells for low-currentportable applications. In

Página 2

DS2710Timeout SelectionFAST-CHARGE state normally operates until -ΔV termi-nation. In the event that termination does not occur cor-rectly, a safety t

Página 3

DS2710Single-Cell NiMH Charger______________________________________________________________________________________ 11DS2710VDDTHMSTATUSVP1VN1VN0TMR

Página 4

DS2710Single-Cell NiMH ChargerMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. N

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DS2710Single-Cell NiMH Charger2 _______________________________________________________________________________________2 _____________________________

Página 6

DS2710Single-Cell NiMH Charger_______________________________________________________________________________________ 3Note 1: Voltages relative to VS

Página 7

DS2710Single-Cell NiMH Charger4 _______________________________________________________________________________________Pin DescriptionPIN NAME FUNCTIO

Página 8

Detailed DescriptionCharge Algorithm OverviewThe DS2710 controls switch-mode topology charging ofa single NiMH cell from a voltage-regulated chargesou

Página 9

DS2710Single-Cell NiMH Charger6 _______________________________________________________________________________________PRECHARGECS = ACTIVE 25% DFSTAT

Página 10

the MAINTENANCE state. If at any time during FAST-CHARGE the cell voltage exceeds VMAX-CHARGE, theDS2710 determines that the cell is either overcharge

Página 11

DS2710Charge-Current RegulationThe DS2710 regulates charge current by maintaining aconstant average voltage across an external senseresistor connected

Página 12

TOP-OFF complete normally if the cell temperatureremains below this threshold.Used with a 10kΩ resistor, the Semitec 103AT-2 pro-vides approximately 0

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