The TL431 is a threeterminal programmable shunt regulator diode. This
monolithic IC voltage reference operates as a low temperature coefficient zener
which is programmable from Vref to 36 V with two external resistors. They
exhibit a wide operating current range of 1.0 mA to 100 mA with a typical
dynamic impedance of 0.22 Ohms.
The characteristics of these references make them excellent replacements for
zener diodes in many applications such as digital voltmeters, power supplies,
and op-amp circuitry. The 2.5 V reference makes it convenient to obtain a stable
reference from 5.0 V logic supplies, and since the TL431 operates as a shunt
regulator, it can be used as either a positive or negative voltage
Programmable Output Voltage to 36 V
Voltage Reference Tolerance: ±0.4%, Typ @ 25¡C (TL431B)
Low Dynamic Output Impedance, 0.22 Ohms Typical
Sink Current Capability of 1.0 mA to 100 mA
Equivalent FullRange Temperature Coefficient of 50 ppm/¡C Typical
Temperature Compensated for Operation over Full Rated Operating
This is a simple Op Amp breakout board, set up as a 2-stage amplifier with a gain of 100 (gain of 10 for each stage). The on-board trim pot sets the signal level between the stages, not the feedback path. The bandwidth is set to 15.9kHz by a pair of feedback capacitors, or over 100kHz with the caps removed. The LMV358 opamp can source up to 160mA...
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Oh so adorable, this is the tiniest little lipo charger, so handy you can keep it any project box! Its also easy to use. Simply plug in the gold plated contacts into any USB port and a 3.7V/4.2V lithium polymer or lithium ion rechargeable battery into the JST plug on the other end. There are two LEDs - one red and one green. While charging, the...