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BQ24007TIN/a17avaiSingle-Cell Li-Ion Charger for PDAs/Internet Appliances, Integrated FET, LED
BQ24007PWPRTIN/a30avaiSingle-Cell Li-Ion Charger for PDAs/Internet Appliances, Integrated FET, LED
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BQ24007PWPR ,Single-Cell Li-Ion Charger for PDAs/Internet Appliances, Integrated FET, LEDSLUS479D − JANUARY 2001 − REVISED NOVEMBER 2004These devices have limited built-in ESD protection. ..
BQ24007RGWR ,Single-Cell Li-Ion Charger for PDAs/Internet Appliances, Integrated FET, LEDFEATURES DESCRIPTIONThe bq2400x series ICs are advanced Li-Ion linear Highly Integrated Solution W ..
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BQ24008PWP ,Single-Cell Li-Ion Charger for PDAs/Internet Appliances, Integrated FET, Bi-Color LEDELECTRICAL CHARACTERISTICS over recommended operating junction temperature supply and input volta ..
BQ24010DRC ,SINGLE-CHIP/ LI-ION CHARGE MANAGEMENT IC FOR HANDHELD APPLICATIONS (bq TINY)ELECTRICAL CHARACTERISTICS (continued)over 0°C≤ T≤ 125°C and recommended supply voltage, (unless ot ..
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BUK7222-55A ,N-channel TrenchMOS standard level FETApplications„ 12 V and 24 V loads„ Motors, lamps and solenoids„ Automotive and general purpose powe ..
BUK7225-55A ,N-channel TrenchMOS standard level FETApplications„ 12 V and 24 V loads„ Motors, lamps and solenoids„ Automotive and general purpose powe ..
BUK7237-55A ,N-channel TrenchMOS standard level FET
BUK7237-55A ,N-channel TrenchMOS standard level FETApplications„ 12 V and 24 V loads„ Motors, lamps and solenoids„ Automotive and general purpose powe ..
BUK7240-100A ,N-channel TrenchMOS standard level FET
BUK7240-100A ,N-channel TrenchMOS standard level FETApplications„ 12 V and 24 V loads„ Motors, lamps and solenoids„ Automotive and general purpose powe ..


BQ24007-BQ24007PWPR-BQ24007RGWR
Single-Cell Li-Ion Charger for PDAs/Internet Appliances, Integrated FET, LED
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SLUS479D − JANUARY 2001 − REVISED NOVEMBER 2004
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FEATURES
Highly Integrated Solution With FET Pass
Transistor and Reverse-Blocking Schottky
and Thermal Protection
Timer-Enable Function That Allows Host to
Disable Charge Timer and Termination When
Charge Current Is Shared With a Load or
When Battery Is Absent
Integrated Voltage and Current Regulation
With Programmable Charge Current
High-Accuracy Voltage Regulation (±1%) Ideal for Low-Dropout Linear Charger
Designs for Single-Cell Li-Ion Packs With
Coke or Graphite Anodes
Up to 1.2-A Continuous Charge Current Safety-Charge Timer During Preconditioning
and Fast Charge
Integrated Cell Conditioning for Reviving
Deeply Discharged Cells and Minimizing Heat
Dissipation During Initial Stage of Charge
Optional Temperature or Input-Power
Monitoring Before and During Charge
Various Charge-Status Output Options for
Driving Single, Double, or Bicolor LEDs or
Host-Processor Interface
Charge Termination by Minimum Current and
Time
Low-Power Sleep Mode Packaging: 5 mm × 5 mm MLP (bq24007)or
20-Lead TSSOP PowerPAD
APPLICATIONS
PDAs Internet Appliances MP3 Players Digital Cameras
DESCRIPTION

The bq2400x series ICs are advanced Li-Ion linear
charge management devices for highly integrated and
space-limited applications. They combine high-
accuracy current and voltage regulation; FET pass-
transistor and reverse-blocking Schottky; battery
conditioning, temperature, or input-power monitoring;
charge termination; charge-status indication; and
charge timer in a small package.
The bq24007 and bq24008 provide the timer-enable
function, allowing the host to disable the charge timer
when charge current is shared with a load or when the
battery is absent. This feature is ideal for applications
such as cellular phones, PDAs, and internet
appliances.
The bq2400x measures battery temperature using an
external thermistor. For safety reasons, the bq2400x
inhibits charge until the battery temperature is within the
user-defined thresholds. Alternatively, the user can
monitor the input voltage to qualify charge. The
bq2400x series then charge the battery in three phases:
preconditioning, constant current, and constant
voltage. If the battery voltage is below the internal
low-voltage threshold, the bq2400x uses low-current
precharge to condition the battery. A preconditioning
timer provides additional safety. Following pre-
conditioning, the bq2400x applies a constant-charge
current to the battery. An external sense-resistor sets
the magnitude of the current. The constant-current
phase is maintained until the battery reaches the
charge-regulation voltage. The bq2400x then
transitions to the constant voltage phase. The user can
configure the device for cells with either coke or
graphite anodes. The accuracy of the voltage regulation
is better than ±1% over the operating junction
temperature and supply voltage range.
Charge is terminated by maximum time or minimum
taper current detection
The bq2400x automatically restarts the charge if the
battery voltage falls below an internal recharge
threshold.
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