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Search results with tag "Current source"
AN-1515 A Comprehensive Study of the Howland Current …
www.ti.comSometimes a unidirectional current source (or sink) is just right. It is easy to make them with high output impedance and wide range, using an op-ampand some Darlington-connectedtransistors. But sometimes you need a current pump that can put out a current in either direction – or even AC currents. The Howland current pump is usually excellent ...
NCP1251 - Current-Mode PWM Controller for Off-line Power ...
www.onsemi.comIsource Peak source current, VGS = 0 V – (Note 5) 6 300 mA Isink Peak sink current, VGS = 12 V – (Note 5) 6 500 mA VDRVlow DRV pin level at VCC close to VCC(min) with a 33 k resistor to GND 6 8.0 V VDRVhigh DRV pin level at VCC = 28 V – DRV unloaded 6 10 12 14 V CURRENT COMPARATOR IIB Input Bias Current @ 0.8 V input level on pin 4 4 0.02 A