Product Overview

Product Overview
NCS1002A: Constant Voltage / Constant Current SecondarySide Controller
For complete documentation, see the data sheet
Product Description
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.
Features
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Low Input Offset Voltage: 0.5 mV, Typ
Input Common-Mode Range includes Ground
Low Quiescent Current: 75 µA per Op Amp at VCC = 5 V
Large Output Voltage Swing
Wide Power Supply Range: 3 V to 36 V
High ESD Protection: 2 kV
Applications
End Products
• Switch Mode Power Supplies
• Battery Chargers
Part Electrical Specifications
Product
Compliance
Status
NCS1002ADR2G
Pb-free
Active
Type
V(BR) Typ
(V)
Tolerance
(%)
IQ Typ
(mA)
IR Min
(mA)
0.4
Halide free
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016
VF Max
(V)
TA Min
(°C)
TA Max
(°C)
Package
Type
-40
105
SOIC-8