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bq24400

Features: · Safe management of fast charge for NiCd and NiMH battery packs.· High-frequency switching controller for efficient and simple charger design· Pre-charge qualification for detecting shorted, damaged, or overheated cells· Fast-charge termination by peak voltahge (PVD), maximum temperatur...

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SeekIC No. : 004301254 Detail

bq24400: Features: · Safe management of fast charge for NiCd and NiMH battery packs.· High-frequency switching controller for efficient and simple charger design· Pre-charge qualification for detecting short...

bq24400 Data Sheet

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Part Number:
bq24400
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/12/25

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Product Details

Description



Features:

· Safe management of fast charge for NiCd and NiMH battery packs.
· High-frequency switching controller for efficient and simple charger design
· Pre-charge qualification for detecting shorted, damaged, or overheated cells
· Fast-charge termination by peak voltahge (PVD), maximum temperature, and maximum charge time
· Selectable top-off mode for achieving maximum capacity in NiMH batteries
· Programmable trickle-charge mode for reviving deeply discharged batteries and for postcharge maintenance
· Built-in battery removal and insertion detection
· Sleep mode for low power consumption


Pinout

Connection Diagram


Specifications

Symbol
Parameter
Minimum
Maximum
Unit
Notes
VCC

VT
TOPR
TSTG
TSOLDER
VCC relative to VSS
DC voltage applied on any pin, excluding
VCC relative to VSS
Operating ambient temperature
Storage temperature

Soldering temperature
-0.3

-0.3
-20
-40
-
+7.0

+7.0
+70
+125
+260
V

V
°C
°C
°C





10s max.

Note: Permanent device damage may occur if Absolute Maximum Ratings are exceeded. Functional operation should be limited to the Recommended DC Operating Conditions detailed in this data sheet. Exposure to conditions beyond the operational limits for extended periods of time may affect device reliability.




Description

The bq24400 is a programmable, monolithic IC for fast-charge management of nickel cadmium (NiCd) and nickel metal-hydride (NiMH) batteries.

The bq24400 provides a number of charge termination criteria:
·Peak voltage, PVD (for NiCd and NiMH)
·Maximum temperature
·Maximum charge time
For safety, the bq24400 inhibits fast charge until the battery voltage and temperature are within user-defined limits. If the battery voltage is below the low-voltage threshold, the bq24400 uses trickle-charge to condition the battery. For NiMH batteries, the bq24400 provides an optional top-off charge to maximize the battery capacity.

The integrated high-frequency comparator allows the bq24400 to be the basis for a complete, high-efficiency power-conversion circuit.




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