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| LTC4065/A: Miniature 750mA Standalone Li-Ion Battery Chargers in 2mm x
2mm Package | | | |
MILPITAS, CA – Linear Technology Corporation introduces the LTC4065 and
LTC4065A, tiny fully integrated standalone linear battery chargers that can charge a single-cell Li-Ion battery up
to 750mA without overheating the device or surrounding components. These full-featured ICs offer timer termination,
recharge, trickle charge, and C/10 detection and are housed in a miniature 6-lead 2mm x 2mm DFN package.
A
complete solution requires only two discrete components (input capacitor and a charge current program resistor) and
fits into a 2.5mm x 2.7mm 0.75mm form factor. Applications include digital still cameras, portable point-of-sale and
diagnostic equipment, cell phones, PDAs and USB-equipped handheld devices.
The LTC4065/A requires
no external MOSFET, sense resistor or blocking diode. A patented thermal regulation scheme prevents the junction
temperature of the IC from exceeding 115°C by reducing charge current during high power or high ambient temperature
operation. Other features of the LTC4065/A include a charge current monitor output for charge termination, a 4.2V
0.5% accurate float voltage, and 5% charge accuracy. Charge current is adjustable with a standard off-the-shelf
resistor. The device is designed to work with supplies up to 5.5V, including those within USB specifications and
from 5V wall adapters. During shutdown, the supply current is only 30uA and battery drain current is less than 1uA.
The LTC4065A features an open drain AC Present status to indicate the presence of an input supply such as a wall
adapter.
The LTC4065EDC and LTC4065AEDC are rated for operation from -40°C to 85°C. Pricing
starts at $1.40 and $1.55 each in 1,000-piece quantities.
Summary of Features: LTC4065 and LTC4065A
* Standalone Charger: Termination, Pre-Charge, Charge Control and Recharge
* C/10
Charge Current Detection Output
* Safety Timer Termination
* Programmable Charge Current
up to 750mA with ±5% Accuracy
* Thermal Regulation Maximizes Charge Rate without Risk of Overheating
* Charge Current Monitor Output for Charge Termination
* AC Present Status Indicates Presence
of Input Supply (LTC4065A only)
* No External MOSFET, Sense Resistor or Blocking Diode Required
* Tiny Low-Profile (0.75mm) 6 lead 2mm x 2mm DFN Package
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Jueves, 28 Julio, 2005 - 05:23 | |
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| LTC4065/A: Miniature 750mA Standalone Li-Ion Battery Chargers in 2mm x
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| Alguien dijo ... |
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Ya hace tiempo que el biólogo se ve enfrentado a la teleología como una mujer de la que no puede prescindir, pero con la que no quiere ser visto en público.
François Jacob (1920).
Médico, biólogo y genetista francés, Premio Nobel de Fisiología o Medicina 1965. |
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