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BQ24401-BQ24401D-BQ24401DG4-BQ24401DR-BQ24401PW-BQ24401PWRG4
Programmable NiCd/NiMH Fast-Charge Management Device
SNS
VSS
MOD
VCC
bq24401
www.ti.com SLUS497A –SEPTEMBER 2001–REVISED MARCH 2010
Programmable NiCd/NiMH Fast-Charge Management IC Rateof temperature rise (ΔT/Δt)
Temperature, and Maximum Charge Time Maximum temperature
• Selectable Top-Off Mode for Achieving Maximum charge time
Maximum Capacityin 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 foruser-defined limits.If the battery voltageis below the
Postcharge Maintenancelow-voltage threshold, the bq24401 uses
• Built-in Battery Removal and Insertion to condition the battery. For NiMH
Detection the bq24401 provides an optional top-off
• Sleep Mode for Low Power Consumptionto maximize the battery capacity. integrated high-speed comparator allows the
APPLICATIONS to be the basis for a complete,
• Nickel Charger battery charger circuit for nickel-based
High-Power, Multi-Cell Charger between para and illustration
8-Pin DIPor Narrow Pin NamesSNS Current-sense input
VSS System ground
LED Charge-status output
BAT Battery-voltage input Temperature-sense input Timer-program input input output
