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/Title (NCS1002A - Constant Voltage / Constant Current Secondary-Side Controller)
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ON Semiconductor
NCS1002A - Constant Voltage / Constant Current Secondary-Side Controller
The NCS1002A is a performance upgrade from the NCS1002
focused on reducing power consumption in applications that require
more efficient operation. It is a highly integrated solution for
Switching Mode Power Supply (SMPS) applications requiring a dual
control loop to perform Constant Voltage (CV) and Constant Current
(CC) regulation. The NCS1002A integrates a 2.5 V voltage reference
and two precision op amps. The voltage reference, along with Op Amp
1, is the core of the voltage control-loop. Op Amp 2 is an independent,
uncommitted amplifier specifically designed for the current control.
Key external components needed to complete the two control loops
are: (a) A resistor divider that senses the output of the power supply
(battery charger) and fixes the voltage regulation set point at the
specified value. (b) A sense resistor that feeds the current sensing
circuit with a voltage proportional to the DC output current. This
resistor determines the current regulation set point and must be
adequately rated in terms of power dissipation. The NCS1002A comes
in a small 8−pin SOIC package and is ideal for space-shrunk
applications such as battery chargers.
2019-01-11T11:00:36-07:00
BroadVision, Inc.
2020-09-29T10:48:34+02:00
2020-09-29T10:48:34+02:00
Acrobat Distiller 18.0 (Windows)
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