Corp.'s LTC4071 is a tiny shunt battery
system for Li-Ion/Polymer batteries that integrates a charger and battery pack
protection in one IC. The LTC4071, with its 550nA operating current, charges
and protects batteries from previously unusable very low current, intermittent
or continuous charging sources. The LTC4071 can charge at currents up to 50mA.
A near zero current (<0.1nA) low battery latching disconnect function
protects even low capacity batteries from deep discharge and potentially
irreparable damage. LTC4071 is housed in a low
profile (0.75 mm) 8-lead 2 x 3 mm DFN package. The device's feature set is
useful for high impedance, lower power charging source applications, such as
energy scavenging/harvesting, resistive isolation or solar-powered systems. It
can charge Li-Ion/Polymer, coin cell and thin film batteries.
With pin-selectable settings of 4.0, 4.1, or 4.2V, the LTC4071's 1 percent
accurate battery float voltage allows the user to optimize the balance between
battery capacity and lifetime. An independent high battery supervisory status
output indicates a near-fully charged battery. The internal thermal battery
conditioner reduces the float voltage to protect Li-Ion/Polymer cells at
elevated battery temperatures. Multiple-cell battery stacks can be charged and
balanced by configuring several LTC4071 ICs in series.
The LTC4071 is offered in an 8-lead MSOP package. The devices are rated for
operation from -40 to 125C. 1,000 piece quantity pricing is $2.20 and $2.30 for
the E grade in the DFN & MSOP packages respectively, and $2.53 and $2.65
for the I grade in DFN & MSOP respectively.
Some humanoid walking robots are also good at running, balancing, and coordinated movements in group settings. Several of our sports robots have won regional or worldwide acclaim in the RoboCup soccer World Cup, or FIRST Robotics competitions. Others include the world's first hockey-playing robot and a trash-talking Scrabble player.
The DDV-IP is a two-wheeled self-balancing robot that can deliver cold beverages to thirsty folks on hot summer days. A wireless RF remote enables manual control of the device beyond the act of self-balancing. All of the features of the DDV-IP result in an effective delivery vehicle while providing entertainment to the user.
Eric Doster of iFixit talks about the most surprising aspect of the Microsoft Surface Pro 3 teardown. In a presentation at Medical Design & Manufacturing Midwest, iFixit gave the Surface Pro 3 a score of one (out of a possible 10) for repairability.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.