1
2
3
4
8
7
6
5
SNS
LED
BAT
V
SS
MOD
V
CC
TS
RC
bq24401
www.ti.com
SLUS497A –SEPTEMBER 2001–REVISED MARCH 2010
Programmable NiCd/NiMH Fast-Charge Management IC
Check for Samples: bq24401
1
FEATURES
GENERAL DESCRIPTION
• Safe Management of Fast Charge for NiCd and
NiMH Battery Packs
The bq24401 is a programmable, monolithic IC for
fast-charge management of nickel cadmium (NiCd)
• High-Frequency Switching Controller for
and nickel metal-hydride (NiMH) in single or multi-cell
Efficient and Simple Charger Design
applications.
• Pre-Charge Qualification for Detecting
The bq24401 provides these charge termination
Shorted, Damaged, or Overheated Cells
criteria:
• Fast-Charge Termination by ΔT/Δt, Maximum
• Rate of temperature rise (ΔT/Δt)
Temperature, and Maximum Charge Time
• Maximum temperature
• Selectable Top-Off Mode for Achieving
• Maximum charge time
Maximum Capacity in NiMH Batteries
• Programmable Trickle-Charge Mode for
For safety, the bq24401 inhibits fast charge until the
battery voltage and temperature are within
Reviving Deeply Discharged Batteries and for
user-defined limits. If the battery voltage is below the
Postcharge Maintenance
low-voltage threshold, the bq24401 uses
• Built-in Battery Removal and Insertion
trickle-charge to condition the battery. For NiMH
Detection
batteries, the bq24401 provides an optional top-off
• Sleep Mode for Low Power Consumption
charge to maximize the battery capacity.
The integrated high-speed comparator allows the
APPLICATIONS
bq24401 to be the basis for a complete,
• Nickel Charger
high-efficiency battery charger circuit for nickel-based
• High-Power, Multi-Cell Charger
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
1
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 © 2001–2010, 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 18 Seite 20 Seite 21 Seite 22
- ・ Paket-Footprint-Pad-Layout on Seite 23
- ・ Markierungsinformationen on Seite 18 Seite 19
- ・ Blockdiagramm on Seite 3
- ・ Typisches Anwendungsschaltbild on Seite 7
- ・ Beschreibung der Funktionen on Seite 1 Seite 3
- ・ Technische Daten on Seite 5
- ・ Anwendungsbereich on Seite 1 Seite 27
