NCS1002: Secondary-Side Controller, Constant Current, Constant Voltage

The NCS1002 Constant Voltage and Constant Current Secondary Controller 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 NCS1002 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 dividerthat 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 adquately rated in terms of power dissipation. The NCS1002 comes in a small 8-pin SOIC package and is ideal for space-shrunk applications such as battery chargers.

特性
  • Low Input Offset Voltage: 0.5mV, Typ
  • Input Common-Mode Range includes Ground.
  • Low Quiescent Current: 300uA per op amp at Vcc=5V.
  • Wide Power Supply Range: 3V to 32V
优势
  • Improved control
  • Greater design range
  • Lower heat dissipation
  • Greater flexibility
应用
  • Voltage regulation
终端产品
  • LED Lighting
  • Switch Mode Power Supplies
应用注释 (1)
Document TitleDocument ID/SizeRevisionRevision Date
A Constant Current Adjustable 0.7 A to 1.5 A, Up to 55 Vdc Single Stage Power Factor Corrected LED Power SupplyAND8427/D (186.0kB)2
封装图纸 (1)
Document TitleDocument ID/SizeRevision
SOIC-8 Narrow Body751-07 (62.6kB)AK
数据表 (1)
Document TitleDocument ID/SizeRevisionRevision Date
Constant Voltage/ Constant Current Secondary-Side ControllerNCS1002/D (180.0kB)2
产品订购型号
产品状况Compliance封装MSL*容器预算价格 (1千个数量的单价)
NCS1002DR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.1216
订购产品技术参数
ProductTypeV(BR) Typ (V)Tolerance (%)IQ Typ (mA)IR Min (mA)VF Max (V)TA Min (°C)TA Max (°C)
NCS1002DR2G0.40.4-40105
Constant Voltage/ Constant Current Secondary-Side Controller (180.0kB) NCS1002
A Constant Current Adjustable 0.7 A to 1.5 A, Up to 55 Vdc Single Stage Power Factor Corrected LED Power Supply NCS1002
SOIC-8 Narrow Body CM1216