Battery Power - March/April 2012 - (Page 20)

New Products • IC’s & Semiconductors TI Introduces Single-Cell, Dual-Input Li-Ion Battery Charger Family for Tablets, e-Readers And Smartphones Texas Instruments, Inc. (TI) has introduced a battery charger integrated circuit to support higher cell capacity batteries and increasing battery charge currents of tablets, e-readers and smartphones. The highly integrated single-cell Li-Ion battery charger has dual inputs, which allow operation from either a USB port or higher power input supply (AC adapter or wireless power input). The two inputs are fully independent from each other and are configurable using the I2C interface or stand-alone interface. Features include integrated FETs support charge rates up to 2.5 A (10.5 W) from IN input, and 1.5 A from USB input and dual source inputs, AC adapter and USB 2.0/3.0 compatibility provide flexibility in design and applications. The 20 V input with 10.5 V over voltage protection supports low-cost unregulated adapters and poor USB sources while the integrated power path allows system startup from deeply discharged or no battery power operating conditions. The bq2416x battery chargers are available now in a 49-pin WCSP package, suggested resale pricing starts at $3.00 in quantities of 1,000. metering markets. Designers often want to create applications where the battery life approaches the end product’s useful life. With its run currents of 150 microamperes/MHz, numerous low-power modes and a low-power sleep mode with RAM retention down to 330 nA, the PIC24F GA3 MCUs enable maximum battery life by reducing the overall amount of power that the application consumes. To allow the application’s real-time clock to continue running when primary power is removed, a VBAT pin can be used to supply back-up power with 400 nA. Additionally, the transition from VDD to the VBAT supply pin occurs automatically as VDD is removed. The integrated LCD display driver provides the ability to directly drive up to 480 segments, with an eight-common-drive capability, enabling more informative and flexible displays that include descriptive icons and scrolling. The MCUs also include a charge time measurement unit (CTMU) with a constant current source that can be used for mTouch capacitive sensing, ultrasonic flow measurement and many other sensors. Step-Down DC/DC Converter with 150°C Maximum Junction Temperature Microchip Expands XLP PIC MCU Portfolio Microchip Technology, Inc. has expanded its eXtreme Low Power (XLP) microcontrollers (MCUs) with the PIC24F GA3 family, featuring a low active current for 16-bit Flash MCUs, as well as several flexible new low-power sleep modes. The PIC24F GA3 devices feature 150 microamperes/MHz active current, as well as six DMA channels, which allow a routine to be executed with less power consumption and increased throughput. The family showcases continual advancement in Microchip’s XLP technology and adds a new low-power sleep mode with RAM retention down to 330 nA. Additionally, these are the first PIC MCUs with VBAT for battery backup of the on-chip real-time clock calendar. With these features, plus an integrated LCD driver and numerous other peripherals, the PIC24F GA3 devices enable more efficient, less expensive designs in the consumer, industrial, medical and Linear Technology has announced the H-grade version of the LT3692A, a monolithic, dual output step-down switching regulator that delivers up to 3.5 A of continuous output current from each channel. It operates from a VIN range of 3 V to 36 V with transient protection to 60 V, making it well suited for load dump and cold-crank conditions found in automotive applications. Independent input, shutdown, feedback, soft-start, current limit and comparator pins for each channel simplify complex power supply tracking/sequencing requirements. The LT3692A’s switching frequency is user-programmable from 250 kHz to 2.25 MHz, enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands. The H-grade versions operate up to a junction temperature of 150°C, compared to the E- and I-grade versions’ 125°C maximum junction temperature. All electrical specifications are identical for the E, I and H. The H-grade parts are tested and guaranteed to the maximum junction temperature of 150°C, and are suited for automotive and industrial applications which are subject to high ambient temperatures. The LT3692AHUH is packaged in a 32-lead 5 mm by 5 mm QFN, priced starting at $4.95 each for 1,000 piece quantities. LT3692AHFE is packaged in a thermally enhanced TSSOP-38 and is FMEA compliant, pricing starts at $5.37 each for 1,000 piece quantities. 20 Battery Power • March/April 2012 www.BatteryPowerOnline.com http://www.BatteryPowerOnline.com

Table of Contents for the Digital Edition of Battery Power - March/April 2012

Battery Power - March/April 2012
Nissan and ABB Link to Evaluate Second-Life Storage Applications for Nissan LEAF Battery Packs
Nichicon Develops 50 kW Quick Charger for Evs
Lithium-Ion Battery-Emulation Circuit Using a Microcontroller
High-Efficiency Switching-Mode Charger System Design Considerations with Dynamic Power Path Management
Making Lithium-Ion Abuse Tests Meaningful
Batteries
Charging & Testing
ICs and Semiconductors
Power Supplies
Components
Industry News
Marketplace
Calendar of Events
Research and Development

Battery Power - March/April 2012