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Panasonics comprehensive range of Polymer Capacitors suited to demanding applications continues to expand, samples available from Anglia

Panasonic have one of the widest ranges of Polymer capacitors available in the industry. Polymer capacitors have excellent frequency characteristics due to their ultra-low ESR (Equivalent Series Resistance) values.

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Compact Efficient Wireless Li-Ion Charger with Regulator from Analog Devices Optimized for Low Power Wearables, demo kit and samples available from Anglia

The Power by Linear™ LTC4126 from Analog Devices expands their offerings in wireless battery charging, the LTC4126 combines a wireless powered battery charger for Li-Ion cells with a high efficiency multi-mode charge pump DC/DC converter, providing a regulated 1.2V output at up to 60mA.

Charging with the LTC4126 allows designers to specify a completely sealed end product without wires or connectors and eliminates the need to constantly replace non-rechargeable (primary) batteries. The efficient 1.2V charge pump output features pushbutton on/off control and can directly power the end product’s ASIC. This greatly simplifies the system solution and reduces the number of necessary external components.

The LTC4126, with its input power management circuitry, rectifies AC power from a wireless power receiver coil and generates a 2.7V to 5.5V input rail to power a full-featured constant-current/constant-voltage battery charger. Features of the battery charger include a pin selectable charge voltage of 4.2V or 4.35V, 7.5mA charge current, automatic recharge, battery temperature monitoring via an NTC pin, and an onboard 6-hour safety charge termination timer. Low battery protection disconnects the battery from all loads when the battery voltage is below 3.0V. The LTC4126’s charge pump switching frequency is set to 50kHz/75kHz to keep switching noise out of the audible range making it ideal for audio related applications such as hearing aids and wireless headsets.

The LTC4126 is housed in a highly compact, low profile (0.74mm) 12-lead 2mm × 2mm LQFN package. The device is guaranteed for operation from –20°C to 85°C in E-grade.

The device is ideal for space-constrained low power Li-Ion cell powered wearables such as hearing aids, medical smart patches, wireless headsets, and Internet of Things (IoT) devices.

Key Features

Wireless Li-Ion Battery Charger Plus High Efficiency Multi-Mode Charge Pump DC/DC
Wideband Rx Frequency: DC to >10MHz
Integrated Rectifier with Overvoltage Limit
Pin Selectable Charge Voltage: 4.2V or 4.35V
Charge Current: 7.5mA (Fixed)
Low Battery Disconnect: 3.0V
NTC Pin for Temperature Qualified Charging
DC/DC Regulated Output: 1.2V
DC/DC Output Current: Up to 60mA
50kHz/75kHz Switching, No Audible Noise
Pushbutton and/or Digital on/off Control for DC/DC
Thermally Enhanced 12-Lead 2mm × 2mm LQFN Package

Demonstration Kit

DC2663A-KIT is a demonstration kit comprising of the DC2662A receiver board and the DC2661A single switch transmitter board. The DC2662A receiver board features the LTC4126 Wireless Li-Ion Charger with Regulator and the DC2661A transmitter board features the LTC6992 Voltage-Controlled Pulse Width Modulator (PWM) IC. The kit also comes with 2 x DC2687A boards which is an application-sized receiver board featuring the LTC4126 device. The application-sized receiver boards in the demo kit can charge a single Li-Ion battery at up to 7.5 mA with an air gap of 2.0 mm to 4.0 mm.

Click here for more information or to buy from Anglia Live.

Click here to download the datasheet for LTC4126

Click here to download the DC2663A-KIT demo kit manual

Anglia are offering customers a FREE demo kit and samples of the LTC4126 Wireless Li-Ion Charger with Regulator from Analog Devices, please fill in the form below to register for your FREE samples now.