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.
Features- 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
| Benefits- Improved control
- Greater design range
- Lower heat dissipation
- Greater flexibility
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Applications | End Products- LED Lighting
- Switch Mode Power Supplies
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Application Notes (1)
Package Drawings (1)
Data Sheets (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCS1002DR2G | Active | Pb-free
Halide free | SOIC-8 | 751-07 | 1 | Tape and Reel | 2500 | $0.1216 |
Specifications
| Product | Type | V(BR) Typ (V) | Tolerance (%) | IQ Typ (mA) | IR Min (mA) | VF Max (V) | TA Min (°C) | TA Max (°C) |
|---|
| NCS1002DR2G | | | 0.4 | 0.4 | | | -40 | 105 |
