Overview
The NCP1380BDR2G is a high-performance quasi-resonant current-mode controller designed by onsemi. It is specifically tailored for powering quasi-resonant converters, utilizing a proprietary valley lockout system. This system ensures stable operation by reducing the switching frequency as the power loading becomes lighter, down to the 4th valley, and then transitioning to a variable frequency mode. This approach enhances standby power performance and efficiency. The controller also includes safety features such as Over Power Protection (OPP) and a fixed internal timer for fault detection, with options for auto-recovery or latched protection depending on the version.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC Range | −0.3 to 28 | V |
| Maximum Driver Pin Voltage | −0.3 to 20 | V |
| Maximum Junction Temperature | 150 | °C |
| Operating Temperature Range | −40 to +125 | °C |
| Storage Temperature Range | −60 to +150 | °C |
| Thermal Resistance Junction-to-Air | 120 | °C/W |
| ESD Capability, HBM Model | 4 kV | |
| Package Type | SOIC-8 | |
| Peak Current Source/Sink Capability | +500 mA / −800 mA | |
| Typical Switching Frequency | Variable, up to 65 kHz |
Key Features
- Quasi-resonant peak current mode control operation
- Valley switching operation with valley lockout for noise-immune operation
- Frequency foldback at light load to improve efficiency
- Adjustable Over Power Protection (OPP)
- Auto-recovery or latched internal output short circuit protection
- Fixed internal 80 ms timer for short circuit protection
- Combined overvoltage and overtemperature protection (Versions A and B)
- Combined overvoltage protection and brownout protection (Versions C and D)
- Extended VCC range operation up to 28 V
- Extremely low no-load standby power
- Internal temperature shutdown
- Direct optocoupler connection
Applications
- AC-DC adapters for notebooks
- Offline battery chargers
- Auxiliary power supplies (flat TVs, appliances)
- High power AC-DC converters for TVs, set-top boxes, etc.
Q & A
- What is the primary function of the NCP1380BDR2G?
The NCP1380BDR2G is a quasi-resonant current-mode controller designed to power quasi-resonant converters. - What is the valley lockout system in the NCP1380BDR2G?
The valley lockout system reduces the switching frequency as the power loading becomes lighter, ensuring stable operation down to the 4th valley and then transitioning to a variable frequency mode. - What safety features does the NCP1380BDR2G include?
The controller includes Over Power Protection (OPP), a fixed internal timer for fault detection, and options for auto-recovery or latched protection. - What are the different protection options available in the NCP1380BDR2G?
The controller offers combined overvoltage and overtemperature protection (Versions A and B) or combined overvoltage protection and brownout protection (Versions C and D). - What is the maximum junction temperature for the NCP1380BDR2G?
The maximum junction temperature is 150°C. - What is the operating temperature range for the NCP1380BDR2G?
The operating temperature range is −40 to +125°C. - What is the storage temperature range for the NCP1380BDR2G?
The storage temperature range is −60 to +150°C. - What is the typical switching frequency of the NCP1380BDR2G?
The switching frequency is variable, up to 65 kHz. - What package type is the NCP1380BDR2G available in?
The NCP1380BDR2G is available in an SOIC-8 package. - Is the NCP1380BDR2G RoHS compliant?
Yes, the NCP1380BDR2G is Pb-free and RoHS compliant.
