The mechanism used is similar enough that a voltage divider can be used in the same way as with the LM317 and the output follows the same formula, using the regulator's fixed voltage for Vref (e.g. 5 V for 7805). However, the 78xx devices' quiescent current is substantially higher an...
Using A Voltage Regulator As A Constant Current Source July 4, 2015byNava Whiteford77 Comments [Afroman] contacted us to share his newvideo on the LM317. The humble LM317 adjustable voltage regulator is everywhere. From wifi routers, to high spec lab equipment. Given a noisy input and a va...
Device can be used as a floating current source controlled by a single resistor. Internal short-circuit current limit Thermal overload protection Output safe-area compensation Green product and no Sb/Br 技术规格 输出类型 可调 输出电压 - 额定值 - 输出电压最大值 37V 输入电压最大值 4...
Device can be used as a floating current source controlled by a single resistor. Normally, no capacitors are needed unless the device is more than six inches from the input filter capacitors, in which case an input bypass capacitor of any type is needed. An optional electrolytic or tantalum ...
Device can be used as a floating current source controlled by a single resistor. Normally, no capacitors are needed unless the device is more than six inches from the input filter capacitors, in which case an input bypass capacitor of any type is needed. An optional electrolytic or tantalum ...
which can change the current of the constant-current source. Resistor R5protects transistor Q1. You can use D1as a light indicator. You can adjust the output voltage using resistor R2. Calculate the output voltage as follows: VOUT=VREF(1+R2/R1)–VR3, where VREFis the reference voltage of...
The leads of the 3 watt LED are hooked up individually to the outputs of the 3 LM317 circuits, while the input is fed to all the 3 modules through a common DC source which could be a SMPS adapter rated appropriately for handling the RGB illumination. ...
Quiescent current flows to the load instead of being wasted flowing to ground. Regulated output voltage of hundreds of volts is possible if the maximum input to output differential does not exceed 40-V at any time. Device can be used as a floating current source controlled by a single ...
It also allows the LM317 to be used as a current source or current sink using a single resistor. Any output voltage output voltage from 1.25-V to 37-V can be obtained by using two resistors. The bias current of the device, up to 10-mA, flows to the output; this current must be ...
Quiescent current flows to the load instead of being wasted flowing to ground. Regulated output voltage of hundreds of volts is possible if the maximum input to output differential does not exceed 40-V at any time. Device can be used as a floating current source controlled by a single ...