Overview
The NCP4328BSNT1G is a secondary side Switch-Mode Power Supply (SMPS) controller designed by onsemi. This device is specifically tailored for applications that require constant voltage (CV) and/or constant current (CC) regulation. The NCP4328 series includes two Operational Transconductance Amplifiers (OTAs) for voltage and current loop regulation, utilizing precise internal voltage references. The outputs of these OTAs are of the open drain type, sinking current only. The NCP4328B variant, which includes the BSNT1G model, features an additional LED driver pin for indication purposes, driven by a 1 kHz square wave with a 12.5% duty cycle when VCC is above the Under Voltage Lockout (UVLO) threshold.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Maximum Operating Input Voltage | VCC | - | - | 36.0 | V |
| VCC UVLO (Rising) | VCCUVLO | 3.3 | 3.5 | 3.7 | V |
| VCC UVLO (Falling) | VCCUVLO | 2.3 | 2.5 | 2.7 | V |
| VCC UVLO Hysteresis | VCCUVLOHYS | 0.8 | 1.0 | - | V |
| Quiescent Current (NCP4328B) | ICC | 115 | 140 | - | μA |
| Reference Voltage (TJ = 25°C) | VREF | 1.244 | 1.250 | 1.256 | V |
| LED Current | ILED | - | - | 10 | mA |
| Junction Temperature | TJ | -40 | - | 150 | °C |
| Storage Temperature | TSTG | -55 | - | 150 | °C |
Key Features
- Operating Input Voltage Range: 2.5 V to 36.0 V
- Supply current less than 100 μA
- ±0.5% Reference Voltage Accuracy (TJ = 25°C)
- Constant Voltage and Constant Current Control Loop
- Indication LED PWM Modulated Driver (NCP4328B)
- Pb-Free, Halogen Free/BFR Free, and RoHS Compliant
Applications
- Offline Adapters for Notebooks, Game Stations, and Printers
- LED Lighting
- High Power AC-DC Converters for TVs, Set-Top Boxes, Monitors, etc.
Q & A
- What is the primary function of the NCP4328BSNT1G?
The NCP4328BSNT1G is a secondary side SMPS controller designed for constant voltage and/or constant current regulation.
- What are the package options for the NCP4328 series?
The NCP4328A is available in a TSOP-5 package, while the NCP4328B is available in a TSOP-6 package.
- What is the operating input voltage range of the NCP4328BSNT1G?
The operating input voltage range is from 2.5 V to 36.0 V.
- What is the quiescent current of the NCP4328B?
The quiescent current of the NCP4328B is typically 140 μA.
- Does the NCP4328BSNT1G include an LED driver?
- What are the typical applications of the NCP4328BSNT1G?
Typical applications include offline adapters for notebooks, game stations, and printers, LED lighting, and high power AC-DC converters for TVs, set-top boxes, and monitors.
- Is the NCP4328BSNT1G RoHS compliant?
- What is the reference voltage accuracy of the NCP4328BSNT1G at 25°C?
The reference voltage accuracy is ±0.5% at 25°C.
- What is the junction temperature range of the NCP4328BSNT1G?
The junction temperature range is from -40°C to 150°C.
- What is the storage temperature range of the NCP4328BSNT1G?
The storage temperature range is from -55°C to 150°C.
