TENS-NS4_Datasheet
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TENS-NS4
Highly Integrated Transcutaneous Electrical Nerve Stimulator (TENS)
The NS4 is a single chip TENS (Transcutaneous Electrical Nerve Stimulation)
device. With an integrated battery charger circuit, power supply switcher, a
high-voltage boost converter and a high-compliance stimulation block, the NS4
can be utilized in targeted applications with minimal off-chip components.
The battery charger enables an external Li-OH battery to be connected directly
to the chip with all charging phases managed internally. All digital and analog
supplies are regulated internally with built-in regulators from the output of the
supply switcher.
A built-in boost converter (DC-DC) enables the generation stimulator voltages
up to 55V simply from the battery supply. An internal control block regulates
the operation of the voltage booster.
The stimulator block is designed to drive anodic and cathodic stimulation
currents pulses up to 57mA. The elevated supply voltage from the boost
converter provides additional compliance headroom to the stimulator thus
allowing a wide range of stimulator loads.
The NS4 generates multiple stimulation patterns to support various end
applications. In the conventional TENS mode 4 sub-stimulation patterns are
available. A second Electrical Muscle Stimulation mode is available with
individual Athlete Strengthening and Muscle Rehabilitation patterns.
Features
Operating Voltage Range: 3.7V to 5V
Operating Temperature Range: 0 to 85C
Operation Frequency: 1MHz
Operation power: from battery or USB or wireless charger
Integrated Battery Charger