LAPIS sampling 10-cell li-ion battery monitoring IC

LAPIS is sampling a 10-cell lithium-ion battery monitoring LSI that provides a current consumption of 25μA

LAPIS is sampling a 10-cell lithium-ion battery monitoring LSI that provides a current consumption of 25μA

LAPIS Semiconductor, a part of ROHM, is sampling a 10-cell lithium-ion battery monitoring LSI that provides a current consumption of 25μA (typ.) making it suitable for battery protection systems in cordless vacuum cleaners, electric tools, and other portable equipment.

The ML5233 has 0.1μA (typ.) current consumption during power down, minimising the effects on battery capacity – even during long-term storage – and contributing to more eco-friendly products with virtually no loss of charged battery power.

In addition, built-in temperature and short-circuit current detection circuits enable detection of not only over-charge/discharge and overcurrent, but also abnormal (high) temperatures during discharge along with battery pack short-circuits – all without an MCU. This decreases footprint by 20% and reduces the number of external components from four to one, leading to smaller battery protection systems and lighter development load.

Overcharge detection accuracy (±15mV per each cell) increases charging efficiency by 7% over products with ±50mV accuracy.

High-voltage processes support 4-10 cells in series using a single LSI, ensuring compatibility with electric tools and other equipment in the 14V to 36V range.

Two LSIs can be combined to support up 20 cells in series and up to 72V.

The company writes:

The ML5233 is a protection IC for the 4- to 10-cell Li-ion rechargeable battery pack. It detects individual cell overvoltage/undervoltage and the pack overcurrent/over-temperature, and then automatically controls the ON/OFF state of the external charge/discharge NMOS-FETs accordingly. Also the ML5233 can be cascaded to handle battery packs with more than 10 cells.

See also: French firm wins Lapis Semi Bluetooth antenna design in

 

david manners

LAPIS sampling 10-cell li-ion battery monitoring IC

LAPIS is sampling a 10-cell lithium-ion battery monitoring LSI that provides a current consumption of 25μA

LAPIS is sampling a 10-cell lithium-ion battery monitoring LSI that provides a current consumption of 25μA

LAPIS Semiconductor, a part of ROHM, is sampling a 10-cell lithium-ion battery monitoring LSI that provides a current consumption of 25μA (typ.) making it suitable for battery protection systems in cordless vacuum cleaners, electric tools, and other portable equipment.

The ML5233 has 0.1μA (typ.) current consumption during power down, minimising the effects on battery capacity – even during long-term storage – and contributing to more eco-friendly products with virtually no loss of charged battery power.

In addition, built-in temperature and short-circuit current detection circuits enable detection of not only over-charge/discharge and overcurrent, but also abnormal (high) temperatures during discharge along with battery pack short-circuits – all without an MCU. This decreases footprint by 20% and reduces the number of external components from four to one, leading to smaller battery protection systems and lighter development load.

Overcharge detection accuracy (±15mV per each cell) increases charging efficiency by 7% over products with ±50mV accuracy.

High-voltage processes support 4-10 cells in series using a single LSI, ensuring compatibility with electric tools and other equipment in the 14V to 36V range.

Two LSIs can be combined to support up 20 cells in series and up to 72V.

The company writes:

The ML5233 is a protection IC for the 4- to 10-cell Li-ion rechargeable battery pack. It detects individual cell overvoltage/undervoltage and the pack overcurrent/over-temperature, and then automatically controls the ON/OFF state of the external charge/discharge NMOS-FETs accordingly. Also the ML5233 can be cascaded to handle battery packs with more than 10 cells.

See also: French firm wins Lapis Semi Bluetooth antenna design in

 

david manners

Cypress claims lowest power harvester ever

Cypress has introduced what it claims is the lowest power energy harvesting power management IC (PMIC), usable with solar cells down to 10x10mm.

Cypress energy harvester wireless sensor node Aimed at wireless sensor nodes, and called S6AE101A, it will start when 1.2uW is available and continue to function on as little as 250nA. According to the firm, 1.2μW is available at 65 lux from a 10 x 10mm solar cell.

The linear chip mediates between a solar cell, an optional non-rechargeable battery, a load and two storage capacitors (one for the load and one for internal circuits), and is built into the firm’s EZ-BLE PRoC wireless sensor node module, which also includes a Bluetooth LE radio.

The module (pictured) squeezes a lot under a 10 x 10mm PV cell: ARM Cortex-M0, Bluetooth radio, two crystals, chip antenna, metal shield and passive components.

“The most compelling wireless sensor nodes that will drive IoT growth are self-powered, can be deployed anywhere for more than 10 years, and require minimal deployment and maintenance costs,” said Kiyoe Nagaya, v-p of Cypress analogue business. “Our energy harvesting PMIC and smart module enable developers to create solar-powered wireless sensor nodes for battery-less IoT devices.”

S6AE101A came though the firm’s Spansion subsidiary, and is sampling now. It is the first of a family with at least two other chips: S6EA102A and S6EA103A, both of which add a second power gating switch for a second output at the expense of 30nA more quiescent current. Both also include a 400nA Iq linear regulator. The …103A also has two more timers and a 20nA comparator.

The second power gated output has its own storage capacitor, and a more sophisticated version of the …101A controller block implements various operating modes using the hardware resources.

Cypress offers a Solar-Powered IoT Device Kit that contains a baseboard with a solar module and a Bluetooth Low Energy-USB bridge.

PMIC software support comes through a web tool called Easy DesignSim.

Cypress S6AE101AS6AE101A at a glance

  • Min solar cell size 1cm2 ( ~100 lux min)
  • Solar cell input 2.0-5.5 V
  • Battery input 2.0-5.5 V
  • Output voltage 1.1-5.2 V
  • Quiescent 250 nA
  • Start-up 1.2 μW
  • Six power gating switches
  • Over-voltage protection
  • 3x3mm 10pin SON

 

steve bush

Cypress claims lowest power harvester ever

Cypress has introduced what it claims is the lowest power energy harvesting power management IC (PMIC), usable with solar cells down to 10x10mm.

Cypress energy harvester wireless sensor node Aimed at wireless sensor nodes, and called S6AE101A, it will start when 1.2uW is available and continue to function on as little as 250nA. According to the firm, 1.2μW is available at 65 lux from a 10 x 10mm solar cell.

The linear chip mediates between a solar cell, an optional non-rechargeable battery, a load and two storage capacitors (one for the load and one for internal circuits), and is built into the firm’s EZ-BLE PRoC wireless sensor node module, which also includes a Bluetooth LE radio.

The module (pictured) squeezes a lot under a 10 x 10mm PV cell: ARM Cortex-M0, Bluetooth radio, two crystals, chip antenna, metal shield and passive components.

“The most compelling wireless sensor nodes that will drive IoT growth are self-powered, can be deployed anywhere for more than 10 years, and require minimal deployment and maintenance costs,” said Kiyoe Nagaya, v-p of Cypress analogue business. “Our energy harvesting PMIC and smart module enable developers to create solar-powered wireless sensor nodes for battery-less IoT devices.”

S6AE101A came though the firm’s Spansion subsidiary, and is sampling now. It is the first of a family with at least two other chips: S6EA102A and S6EA103A, both of which add a second power gating switch for a second output at the expense of 30nA more quiescent current. Both also include a 400nA Iq linear regulator. The …103A also has two more timers and a 20nA comparator.

The second power gated output has its own storage capacitor, and a more sophisticated version of the …101A controller block implements various operating modes using the hardware resources.

Cypress offers a Solar-Powered IoT Device Kit that contains a baseboard with a solar module and a Bluetooth Low Energy-USB bridge.

PMIC software support comes through a web tool called Easy DesignSim.

Cypress S6AE101AS6AE101A at a glance

  • Min solar cell size 1cm2 ( ~100 lux min)
  • Solar cell input 2.0-5.5 V
  • Battery input 2.0-5.5 V
  • Output voltage 1.1-5.2 V
  • Quiescent 250 nA
  • Start-up 1.2 μW
  • Six power gating switches
  • Over-voltage protection
  • 3x3mm 10pin SON

 

steve bush

Cypress claims lowest power harvester ever

Cypress has introduced what it claims is the lowest power energy harvesting power management IC (PMIC), usable with solar cells down to 10x10mm.

Cypress energy harvester wireless sensor node Aimed at wireless sensor nodes, and called S6AE101A, it will start when 1.2uW is available and continue to function on as little as 250nA. According to the firm, 1.2μW is available at 65 lux from a 10 x 10mm solar cell.

The linear chip mediates between a solar cell, an optional non-rechargeable battery, a load and two storage capacitors (one for the load and one for internal circuits), and is built into the firm’s EZ-BLE PRoC wireless sensor node module, which also includes a Bluetooth LE radio.

The module (pictured) squeezes a lot under a 10 x 10mm PV cell: ARM Cortex-M0, Bluetooth radio, two crystals, chip antenna, metal shield and passive components.

“The most compelling wireless sensor nodes that will drive IoT growth are self-powered, can be deployed anywhere for more than 10 years, and require minimal deployment and maintenance costs,” said Kiyoe Nagaya, v-p of Cypress analogue business. “Our energy harvesting PMIC and smart module enable developers to create solar-powered wireless sensor nodes for battery-less IoT devices.”

S6AE101A came though the firm’s Spansion subsidiary, and is sampling now. It is the first of a family with at least two other chips: S6EA102A and S6EA103A, both of which add a second power gating switch for a second output at the expense of 30nA more quiescent current. Both also include a 400nA Iq linear regulator. The …103A also has two more timers and a 20nA comparator.

The second power gated output has its own storage capacitor, and a more sophisticated version of the …101A controller block implements various operating modes using the hardware resources.

Cypress offers a Solar-Powered IoT Device Kit that contains a baseboard with a solar module and a Bluetooth Low Energy-USB bridge.

PMIC software support comes through a web tool called Easy DesignSim.

Cypress S6AE101AS6AE101A at a glance

  • Min solar cell size 1cm2 ( ~100 lux min)
  • Solar cell input 2.0-5.5 V
  • Battery input 2.0-5.5 V
  • Output voltage 1.1-5.2 V
  • Quiescent 250 nA
  • Start-up 1.2 μW
  • Six power gating switches
  • Over-voltage protection
  • 3x3mm 10pin SON

 

steve bush

Crystek launches 2.5GHz phase locked clock source

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500 (.pdf).

The resulting source features -105dBc/Hz phase noise at 10KHz offset and a noise floor of -167dBc/Hz.

Crystek designed the module using proprietary circuitry and SAW (surface acoustic wave) resonator technology to provide ultra-low jitter/phase noise performance with true SineWave output.

CRFS75-2500
Frequency (MHz)
2500.000
Package 0.75 x 0.75 in
SMD
Supply (VDC) 5.00
Output SINEWAVE
Stability ppm (°C)
±25 (-20 to 70)
Data Sheet CRFS75-2500.pdf
Notes
  • Phase Locked

 

david manners

Crystek launches 2.5GHz phase locked clock source

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500 (.pdf).

The resulting source features -105dBc/Hz phase noise at 10KHz offset and a noise floor of -167dBc/Hz.

Crystek designed the module using proprietary circuitry and SAW (surface acoustic wave) resonator technology to provide ultra-low jitter/phase noise performance with true SineWave output.

CRFS75-2500
Frequency (MHz)
2500.000
Package 0.75 x 0.75 in
SMD
Supply (VDC) 5.00
Output SINEWAVE
Stability ppm (°C)
±25 (-20 to 70)
Data Sheet CRFS75-2500.pdf
Notes
  • Phase Locked

 

david manners

Crystek launches 2.5GHz phase locked clock source

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500

Crystek Microwave has launched a 2.5 GHZ phase locked clock source with internal reference, the CRFS75-2500 (.pdf).

The resulting source features -105dBc/Hz phase noise at 10KHz offset and a noise floor of -167dBc/Hz.

Crystek designed the module using proprietary circuitry and SAW (surface acoustic wave) resonator technology to provide ultra-low jitter/phase noise performance with true SineWave output.

CRFS75-2500
Frequency (MHz)
2500.000
Package 0.75 x 0.75 in
SMD
Supply (VDC) 5.00
Output SINEWAVE
Stability ppm (°C)
±25 (-20 to 70)
Data Sheet CRFS75-2500.pdf
Notes
  • Phase Locked

 

david manners

Boost converter will deliver 15V from 500mV

Linear Tech LTC3121 boost converter

Linear Tech LTC3121 boost converter

Linear Tech has introduced a boost converter that starts from 1.8V minimum, but will run with inputs from 0.5-5.5V.

It is synchronous, with 1.5A switches, delivering up to 400mA at 12V from 5V.

“Its 1.5A current limit makes it well suited for input current constrained applications such as PCI Express while minimizing the size of the required externals,” said the firm.

Called LTC3121, it has an output disconnect to prevent the battery bleeding through the chip on shut-down (with <1µA quiescent from battery), and in normal operation it stays in regulation when the input voltage exceeds the output voltage.

Pin-selectable burst mode which drops quiescent current to 25µA, or constant PWM mode keeps noise to a minimum.

For compact dc-dc converters, it comes in a 3 x 4mm DFN-12 thermally-enhanced package switches at 3MHz for small passive components, or it can run as slow as 100kHz.

Switch on-resistances of 121mΩ (n-channel) and 188mΩ (p-channel) contribute to the 95% peak efficiency.

Additional features include external synchronisation, soft start, output over-voltage protection and short-circuit protection.

The industrial-grade LTC3121IDE is guaranteed to operate over -40°C to 125°C operating junction temperature.

steve bush

Boost converter will deliver 15V from 500mV

Linear Tech LTC3121 boost converter

Linear Tech LTC3121 boost converter

Linear Tech has introduced a boost converter that starts from 1.8V minimum, but will run with inputs from 0.5-5.5V.

It is synchronous, with 1.5A switches, delivering up to 400mA at 12V from 5V.

“Its 1.5A current limit makes it well suited for input current constrained applications such as PCI Express while minimizing the size of the required externals,” said the firm.

Called LTC3121, it has an output disconnect to prevent the battery bleeding through the chip on shut-down (with <1µA quiescent from battery), and in normal operation it stays in regulation when the input voltage exceeds the output voltage.

Pin-selectable burst mode which drops quiescent current to 25µA, or constant PWM mode keeps noise to a minimum.

For compact dc-dc converters, it comes in a 3 x 4mm DFN-12 thermally-enhanced package switches at 3MHz for small passive components, or it can run as slow as 100kHz.

Switch on-resistances of 121mΩ (n-channel) and 188mΩ (p-channel) contribute to the 95% peak efficiency.

Additional features include external synchronisation, soft start, output over-voltage protection and short-circuit protection.

The industrial-grade LTC3121IDE is guaranteed to operate over -40°C to 125°C operating junction temperature.

steve bush