Saturday, April 4, 2009

ADJUSTABLE CURRENT SOURCE Circuit

The HIP5600 can supply a 450 A (20%) constant current.
It makes use of the internal bias network.



See Figure 27 for bias current versus input voltage.
With the addition of a potentiometer and a 10 F capacitor the
HIP5600 will provide a constant current source. IOUT is given
by Equation 13 in Figure 16.


FIGURE 16. ADJUSTABLE CURRENT SOURCE


1.5A ADJUSTABLE CURRENT SOURCE Circuit



The LM317 is an adjustable 3−terminal positive voltage regulator
capable of supplying in excess of 1.5 A over an output voltage
range of 1.2 V to 37 V. This voltage regulator is exceptionally
easy to use and requires only two external resistors to set the
output voltage. Further, it employs internal current limiting,
thermal shutdown and safe area compensation, making it
essentially blow−out proof.

The LM317 serves a wide variety of applications including
local, on card regulation. This device can also be used to
make a programmable output regulator, or by connecting a fixed
resistor between the adjustment and output, the LM317 can be
used as a precision current regulator.
Features
-Output Current in Excess of 1.5 A
-Output Adjustable between 1.2 V and 37 V
-Internal Thermal Overload Protection
-Internal Short Circuit Current Limiting Constant with Temperature
-Output Transistor Safe−Area Compensation
-Floating Operation for High Voltage Applications
-Available in Surface Mount D2PAK−3, and Standard 3−Lead
Transistor Package
-Eliminates Stocking many Fixed Voltages
-Pb−Free Packages are Available

Relate Posts