The LTC4000-1 is a high voltage controller and power manager with input maximum power point control (MPPC) that converts virtually any externally compensated DC/DC power supply into a full-featured battery charger. It is capable of driving typical DC/DC converter topologies, including buck, boost, buck-boost, SEPIC, flyback and forward.

The device offers precision input current monitoring and charge current monitoring and regulation. It 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.

The LTC4000-1’s MPPC circuit features an input voltage regulation loop that controls charge current to maintain the input voltage at a programmed level, ideal for solar panels or other high impedance sources. Applications include: high power battery charger systems, high performance portable instruments, battery backup systems, and industrial or military battery-equipped devices.

This high voltage controller features an intelligent PowerPath topology that preferentially provides power to the system load when input power is limited. The device 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 deeply discharged battery. External sense resistors and precision sensing ensure accurate currents at high efficiency, allowing operation with converters that span the power range from milliwatts to kilowatts.

The LTC4000-1’s full-featured controller charges a variety of battery chemistries, including lithium-ion/polymer/phosphate, sealed lead acid (SLA), and nickel-based. It 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 LTC4000-1 is housed in low profile (0.75mm) 28-pin 4mm x 5mm QFN and 28-lead SSOP packages. 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/LTC4000-1 .

Summary of Features of the LTC4000-1:

•  Maximum Power Control: Solar Panel Input Compatible

•  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 & Load Sharing with the Battery

•  Instant-On Operation with Heavily Discharged Battery

•  Programmable Charge Current: ±1% Accuracy

•  Precision Input & Charge Current Monitors

•  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 × 5mm QFN or SSOP Packages

Typical Application

 

 

 

 

 

 

About Linear Technology

Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, µModule products, and many other analog functions.  Applications for Linear Technology’s high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.

Linear Technology (UK) Limited
Tel: +44 (0)1628 477066

E-mail: uksales@linear.com

Web site: www.linear.com