Path: EDN Asia >> Product Centre >> Consumer Electronics >> Nano-power system timers cut system standby power use
Consumer Electronics Share print

Nano-power system timers cut system standby power use

26 Aug 2013

Share this page with your friends

TI timers

Texas Instruments (TI) has uncloaked two programmable system timers that claim to significantly reduce system standby power consumption. The TPL5000 with watchdog timer and TPL5100 with MOS driver draw only 30nA of current, a reduction of 90% compared to competitive solutions. They also replace an MCU's internal timer, allowing the device to remain in low-power sleep mode, indicated the company.

TI nano timers address a range of battery-powered and energy harvesting systems including smoke alarms, CO alarms, intelligent price tags, occupancy sensors, security cameras, door locks, wireless sensor nodes and data loggers. In these applications, the main system is in sleep mode or power-down mode most of the time, which makes the power consumption of the MCU internal timer significant. By drawing much lower current than an MCU timer, the TPL5000 and TPL5100 greatly reduce power consumption and extend the operating life of these systems.

The TPL5000 and TPL5100 enable the use of smaller, more affordable batteries, while extending battery life. The TPL5000's selectable timing delay can be set from one to 64 seconds to further extend battery life in smoke detectors and many other applications. It can be programmed for 16- to 1,024-second intervals in energy harvesters, wireless sensor nodes and data loggers, where measurement data changes slowly.

The TPL5000 supports the EN50271 European safety standard without adding to a system's power consumption budget. Additionally, the devices can be combined with any MCU, including TI's Tiva C Series TM4C123x ARM Cortex-M4, Piccolo C28x and fully programmable MSP430G2553 Value Line. It can also be used with the LMP91000 configurable AFE potentiostat for chemical sensing or LMP91050 configurable AFE for NDIR sensing, as well as the bq25504 nano-power management IC, and TPS62175 and TPS61220 DC/DC converters.

System designers can purchase the TPL5000EVM or TPL5100EVM for a suggested retail price of $20. These EVMs allow designers to configure the TPL5000 and TPL5100's delay timers and measure their ultra-low current consumption. The EVMs connect directly to the MSP430, Tiva C Series and C2000 Piccolo LaunchPads to test their watchdog timer and power cycling features. IBIS models are also available for the TPL5000 and TPL5100 to verify signal integrity.

The TPL5000 and TPL5100 are available in a 10-pin, 3 x 5mm VSSOP packages for a suggested retail price of $0.60 in 1,000-unit quantities.

Want to more of this to be delivered to you for FREE?

Subscribe to EDN Asia alerts and receive the latest design ideas and product news in your inbox.

Got to make sure you're not a robot. Please enter the code displayed on the right.

Time to activate your subscription - it's easy!

We have sent an activate request to your registerd e-email. Simply click on the link to activate your subscription.

We're doing this to protect your privacy and ensure you successfully receive your e-mail alerts.

Add New Comment
Visitor (To avoid code verification, simply login or register with us. It is fast and free!)
*Verify code:
Tech Impact

Regional Roundup
Control this smart glass with the blink of an eye
K-Glass 2 detects users' eye movements to point the cursor to recognise computer icons or objects in the Internet, and uses winks for commands. The researchers call this interface the "i-Mouse."

GlobalFoundries extends grants to Singapore students
ARM, Tencent Games team up to improve mobile gaming

News | Products | Design Features | Regional Roundup | Tech Impact