Battery Charge Controller IC is rated up to 60 V.

April 20, 2011 - Capable of driving typical DC/DC converter topologies, LTC4000 converts externally compensated DC/DC power supply into full-featured battery charger. It operates across 3-60 V input and output voltage range; is compatible with various input voltage sources, battery stacks, and chemistries; and preferentially provides power to system load when input power is limited. IC also controls external PFETs, providing low-loss reverse current protection and instant-on operation.

Original Press release

Linear Technology Corp.
1630 McCarthy Blvd.
Milpitas, CA, 95035
USA

60V Battery Charging Controller & Power Manager

MILPITAS, CA - Linear Technology Corporation introduces the LTC4000, a high voltage controller and power manager that converts virtually any externally compensated DC/DC power supply into a full-featured battery charger. The LTC4000 is capable of driving typical DC/DC converter topologies, including buck, boost, buck-boost, SEPIC and flyback. The device offers precision input and charge current regulation and operates across a wide 3V to 60V input and output voltage range, compatible with a variety of different input voltage sources, battery stacks and chemistries. Typical applications include high power battery charger systems, high performance portable instruments, battery back-up systems, industrial battery-equipped devices and notebook/subnotebook computers.

The LTC4000 features an intelligent PowerPath(TM) topology that preferentially provides power to the system load when input power is limited. The LTC4000 controls external PFETs to provide low loss reverse current protection, efficient charging and discharging of the battery and instant-on operation to ensure that system power is available at plug-in even with a dead or deeply discharged battery. External sense resistors and precision sensing enable accurate currents at high efficiency, allowing the LTC4000 to work with converters that span the power range from milliwatts to kilowatts.

The LTC4000's full-featured controller charges a variety of battery chemistries including lithium-ion/polymer/phosphate, sealed lead acid (SLA), and nickel-based. The device also provides charge status indicators through its FLT and CHRG pins. Other features of the battery charger include: ±0.2% programmable float voltage, selectable timer or C/X current termination, temperature-qualified charging using an NTC thermistor, automatic recharge, C/10 trickle charge for deeply discharged cells and bad battery detection.

The LTC4000 is housed in a low profile (0.75mm) 28-pin 4mm x 5mm QFN package and a 28-lead SSOP package. The device is guaranteed for operation from -40°C to 125°C. 1,000-piece pricing starts at $3.95 each. For more information, visit www.linear.com/product/LTC4000.

Summary of Features: LTC4000

Implements a Complete High Performance Battery Charger when Paired with a DC/DC Converter (Buck, Buck-Boost, Boost, SEPIC & Flyback)

Wide Input & Output Voltage Range: 3V to 60V

Input Ideal Diode for Low Loss Reverse Blocking & Load Sharing

Output Ideal Diode for Low Loss PowerPath(TM) & Load Sharing with the Battery

Instant-On Operation with Heavily Discharged Battery

Programmable Input & Charge Current: ±1% Accuracy

Accurate Programmable Float Voltage: ±0.2% at Room & ±1% over Temperature

Programmable C/X or Timer-Based Charge Termination

NTC Input for Temperature Qualified Charging

28-Lead 4mm x 5mm QFN or SSOP Packages

About Linear Technology
Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing and marketing a broad line of high performance analog integrated circuits for major companies worldwide for three decades. The Company's products provide an essential bridge between our analog world and the digital electronics in communications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. Linear Technology produces power management, data conversion, signal conditioning, RF and interface ICs, and µModule® subsystems.

LT, LTC, LTM, µModule and are registered trademarks and PowerPath is a trademark of Linear Technology Corp. All other trademarks are the property of their respective owners.

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