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SNS
LED
BAT
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SS
MOD
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CC
TS
RC
bq2000T
www.ti.com
SLUS149D –MAY 1999–REVISED JANUARY 2010
Programmable Multi-Chemistry Fast-Charge Management IC
Check for Samples: bq2000T
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FEATURES
GENERAL DESCRIPTION
• Safe Management of Fast Charge for NiCd,
NiMH, or Li-Ion Battery Packs
The bq2000T is a programmable, monolithic IC for
fast-charge management of nickel cadmium (NiCd),
• High-Frequency Switching Controller for
nickel metal-hydride (NiMH), or lithium-ion (Li-Ion)
Efficient and Simple Charger Design
batteries in single- or multi-chemistry applications.
• Pre-Charge Qualification for Detecting
The bq2000T chooses the proper battery chemistry
Shorted, Damaged, or Overheated Cells
(either nickel or lithium) and proceeds with the
• Fast-Charge Termination by ΔT/Δt for Nickel
optimal charging and termination algorithms. This
Chemistries, Minimum Current for Li-Ion
process eliminates undesirable, undercharged, or
overcharged conditions, and allows accurate and safe
Chemistries, Maximum Temperature, and
termination of fast charge.
Maximum Charge Time
• Selectable Top-Off Mode for Achieving
Depending on the chemistry, the bq2000T provides a
Maximum Capacity in NiMH Batteries number of charge termination criteria:
• Rate of temperature rise (ΔT/Δt) (for NiCd and
• Programmable Trickle-Charge Mode for
NiMH)
Reviving Deeply Discharged Batteries and for
• Minimum charge current (for Li-Ion)
Postcharge Maintenance
• Maximum temperature
• Built-in Battery Removal and Insertion
• Maximum charge time
Detection
• Sleep Mode for Low Power Consumption
For safety, the bq2000T inhibits fast charge until the
battery voltage and temperature are within
APPLICATIONS
user-defined limits. If the battery voltage is below the
low-voltage threshold, the bq2000T uses
• Multi-Chemistry Charger
trickle-charge to condition the battery. For NiMH
• Nickel Charger
batteries, the bq2000T provides an optional top-off
• High-Power, Multi-Cell Charger
charge to maximize the battery capacity.
The integrated high-speed comparator allows the
bq2000T to be the basis for a complete,
high-efficiency battery charger circuit for both
nickel-based and lithium-based chemistries.
spacer between para and illustration
8-Pin DIP or Narrow SOIC or TSSOP Pin Names
SNS Current-sense input
V
SS
System ground
LED Charge-status output
BAT Battery-voltage input
TS Temperature-sense input
RC Timer-program input
V
CC
Supply-voltage input
MOD Modulation-control output
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 1999–2010, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 2
- ・ Abmessungen des Paketumrisses on Seite 19 Seite 21 Seite 22 Seite 24
- ・ Paket-Footprint-Pad-Layout on Seite 25
- ・ Markierungsinformationen on Seite 19 Seite 20
- ・ Blockdiagramm on Seite 3
- ・ Typisches Anwendungsschaltbild on Seite 8
- ・ Beschreibung der Funktionen on Seite 1 Seite 3
- ・ Technische Daten on Seite 5
- ・ Anwendungsbereich on Seite 1 Seite 29
