Overview
The NCP4328ASNT1G is a secondary side Switch-Mode Power Supply (SMPS) controller produced by onsemi. This component is designed for applications requiring constant voltage and/or constant current regulation. It features two Operational Transconductance Amplifiers (OTAs) for voltage and current loop regulation, with precise internal voltage references. The NCP4328ASNT1G is available in a TSOP-5 package and is RoHS compliant, making it suitable for a variety of power management applications.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Manufacturer | onsemi | - |
| Part Number | NCP4328ASNT1G | - |
| Package | TSOP-5 | - |
| Operating Input Voltage Range | 2.5 V to 36.0 V | - |
| Supply Current | < 100 μA | - |
| Reference Voltage Accuracy | ±0.5% at TJ = 25°C | - |
| Voltage Reference | 1.244 V to 1.256 V (TJ = 25°C) | - |
| Current Reference | 62.5 mV (TJ = 25°C) | - |
| UVLO (VCC rising) | 3.3 V to 3.7 V | - |
| UVLO (VCC falling) | 2.3 V to 2.7 V | - |
| UVLO Hysteresis | 0.8 V to 1.0 V | - |
| Quiescent Current (NCP4328A) | 105 μA to 130 μA | - |
Key Features
- Secondary side SMPS controller for constant voltage and/or constant current regulation.
- Two OTA amplifiers for voltage and current loop regulation with precise internal voltage references.
- Outputs of OTAs are open drain type, sinking current only.
- Operating input voltage range from 2.5 V to 36.0 V.
- Supply current less than 100 μA.
- ±0.5% reference voltage accuracy at TJ = 25°C.
- LED driver pin (in NCP4328B) with a 1 kHz square wave and 12.5% duty cycle for indication purposes.
- Available in TSOP-5 package (NCP4328A) and TSOP-6 package (NCP4328B).
- Rohs compliant, PbFree, Halogen Free/BFR Free.
Applications
- Offline adapters for notebooks, game stations, and printers.
- High power AC-DC converters for TVs, set-top boxes, and monitors.
- LED lighting systems.
- Other applications requiring constant voltage and/or constant current regulation.
Q & A
- What is the primary function of the NCP4328ASNT1G?
The NCP4328ASNT1G is a secondary side SMPS controller designed for applications requiring constant voltage and/or constant current regulation.
- What is the operating input voltage range of the NCP4328ASNT1G?
The operating input voltage range is from 2.5 V to 36.0 V.
- What is the accuracy of the reference voltage?
The reference voltage accuracy is ±0.5% at TJ = 25°C.
- What type of packages are available for the NCP4328?
The NCP4328A is available in a TSOP-5 package, and the NCP4328B is available in a TSOP-6 package.
- Does the NCP4328ASNT1G include a LED driver?
No, the NCP4328ASNT1G does not include a LED driver. This feature is available in the NCP4328B version.
- What is the quiescent current of the NCP4328A?
The quiescent current of the NCP4328A is between 105 μA and 130 μA.
- Is the NCP4328ASNT1G RoHS compliant?
- What are some typical applications of the NCP4328ASNT1G?
Typical applications include offline adapters for notebooks, game stations, and printers, as well as high power AC-DC converters for TVs, set-top boxes, and monitors.
- What is the UVLO (Under Voltage Lock Out) range for the NCP4328ASNT1G?
The UVLO range is 3.3 V to 3.7 V for VCC rising and 2.3 V to 2.7 V for VCC falling.
- How does the LED driver in the NCP4328B operate?
The LED driver in the NCP4328B operates with a 1 kHz square wave and a 12.5% duty cycle when VCC is above UVLO.
