下载
1
2
3
4
8
7
6
5
SNS
LED
BAT
V
SS
MOD
V
CC
TS
RC
bq24400
www.ti.com
SLUS498A –SEPTEMBER 2001–REVISED FEBRUARY 2010
Programmable NiCd/NiMH Fast-Charge Management IC
Check for Samples: bq24400
1
FEATURES
GENERAL DESCRIPTION
• Safe Management of Fast Charge for NiCd and
NiMH Battery Packs
The bq24400 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 bq24400 provides these charge termination
Shorted, Damaged, or Overheated Cells
criteria:
• Fast-Charge Termination by Peak Voltage
• Peak voltage, PVD
(PVD), Maximum Temperature, and Maximum
• Maximum temperature
Charge Time
• Maximum charge time
• Selectable Top-Off Mode for Achieving
Maximum Capacity in NiMH Batteries
For safety, the bq24400 inhibits fast charge until the
battery voltage and temperature are within
• Programmable Trickle-Charge Mode for
user-defined limits. If the battery voltage is below the
Reviving Deeply Discharged Batteries and for
low-voltage threshold, the bq24400 uses
Postcharge Maintenance
trickle-charge to condition the battery. For NiMH
• Built-in Battery Removal and Insertion
batteries, the bq24400 provides an optional top-off
Detection
charge to maximize the battery capacity.
• Sleep Mode for Low Power Consumption
The integrated high-speed comparator allows the
bq24400 to be the basis for a complete,
APPLICATIONS
high-efficiency battery charger circuit for nickel-based
• Nickel Charger
chemistries.
• High-Power, Multi-Cell Charger
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.
页面指南
