BQ21040DBVT Part Information

Details for BQ21040DBVT by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Battery Management

Part Description

The bq21040 device is a highly integrated Li-Ion and Li-Pol linear battery charger device targeted at spacelimited portable applications. The device operates from either a USB port or AC adapter. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters. The bq21040 has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10 hour safety timer. The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded. The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The pre-charge current and termination current threshold are fixed to 20% and 10%, respectively. The fast charge current value is programmable through an external resistor.

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Part Features

  • Charging u2013 1% Charge Voltage Accuracy u2013 10% Charge Current Accuracy u2013 Low Battery Leakage Current (1 u00b5A) u2013 Programmable Charge Current using External Resistor up to 800 mA u2013 4.2-V Li-Ion and Li-Pol Charger
  • Protection u2013 30-V Input Rating; with 6.6-V Input Overvoltage Protection u2013 Input Voltage Dynamic Power Management u2013 125u00b0C Thermal Regulation; 150u00b0C Thermal Shutdown Protection u2013 OUT Short-Circuit Protection and ISET Short Detection u2013 Overtemperature Sensing Protection Through NTC u2013 Fixed 10-Hour Safety Timer
  • System

Part Specifications

Battery Type Li-Ion Li-Pol
Input Voltage 6.45V
Battery Charge Voltage 4.2V
Charge Current Max 800mA
Battery IC Case Style SOT-23
No. of Pins 6Pins
No. of Series Cells 1
Operating Temperature Min 0°C
Operating Temperature Max 125°C
Product Range bq21040 Series
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
RoHS Compliant

Alternative Part Descriptions

  • BATT CHARGER, LI-ION/LI-POL, SOT-23-6; Battery Type:Li-Ion, Li-Pol; Input Voltage:6.45V; Battery Charge Voltage:4.2V; Charge Current Max:800mA; Battery IC Case Style:SOT-23; No. of Pins:6Pins; No. of Series Cells:1; Operating RoHS Compliant: Yes | Newark Electronics
  • 1-cell, 0.8-A Li-ion and Li-polymer battery charger | Texas Instruments

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