Overview
The NCP1076BBP100G, produced by onsemi, is an enhanced off-line switcher integrated circuit designed for robust and highly efficient power supplies. This device integrates a fixed frequency current mode controller with a 700 V MOSFET, offering a high level of integration and various protection features. It is available in the PDIP-7 package and supports multiple operating frequencies (65 kHz, 100 kHz, and 130 kHz), making it versatile for various power supply applications.
Key Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Power supply voltage, VCC pin, continuous voltage | VCC | −0.3 to 20 | V |
| Voltage on all pins, except DRAIN and VCC pin | Vinmax | −0.3 to 10 | V |
| DRAIN voltage | BVDSS | −0.3 to 700 | V |
| Maximum Current into VCC pin | ICC | 15 | mA |
| Drain Current Peak during Transformer Saturation (TJ = 25°C) | IDS(PK) | 2.2 A (NCP1076uz) | A |
| Oscillation frequency (100 kHz version, TJ = 25°C) | fOSC(100) | 90 to 110 kHz | kHz |
| Temperature shutdown | TSD | 150°C | °C |
| RDS(ON) of the MOSFET | RDS(ON) | 4.8 Ω (NCP1076uz) | Ω |
Key Features
- Built-in 700 V MOSFET: With an RDS(ON) of 4.8 Ω for the NCP1076uz version, ensuring high efficiency and reliability.
- Current-mode Fixed Frequency Operation: Supports frequencies of 65 kHz, 100 kHz, and 130 kHz.
- Soft-start and Frequency Jittering: Reduces electromagnetic interference (EMI) and ensures smooth startup.
- Short-circuit Protection and Skip-cycle: Enhances reliability by preventing damage from short circuits and reducing standby consumption.
- Dynamic Self-Supply (DSS): Eliminates the need for an auxiliary winding, providing supply voltage via an internal high-voltage current source.
- Line Detection and Brown-out/AC Line Over-Voltage Protection: Prevents operation at too low or too high AC input voltages, ensuring safe and stable operation.
- Over-power Protection (OPP): Compensates for internal delays in high input voltage conditions to optimize maximum output current capability.
- Temperature Shutdown and Hysteresis: Protects the device from overheating with a temperature shutdown at 150°C and a hysteresis of 20°C.
Applications
The NCP1076BBP100G is suitable for a variety of power supply applications, including:
- Universal Mains Power Supplies: Up to 28 W, leveraging the high-voltage MOSFET and efficient current-mode control.
- Isolated Flyback Converters: Ideal for applications requiring high voltage isolation and efficiency.
- Consumer Electronics: Such as chargers, adapters, and other small power supplies where high efficiency and reliability are crucial.
- Industrial Power Supplies: Where robustness and protection against various fault conditions are essential).
Q & A
- What is the maximum drain voltage for the NCP1076BBP100G?
The maximum drain voltage (BVDSS) is 700 V).
- What are the supported operating frequencies for this device?
The device supports operating frequencies of 65 kHz, 100 kHz, and 130 kHz).
- What is the RDS(ON) of the MOSFET in the NCP1076uz version?
The RDS(ON) of the MOSFET in the NCP1076uz version is 4.8 Ω).
- Does the NCP1076BBP100G have built-in protection features?
Yes, it includes short-circuit protection, brown-out detection, AC line over-voltage protection, and over-power protection).
- What is the purpose of the dynamic self-supply (DSS) feature?
The DSS feature eliminates the need for an auxiliary winding by providing supply voltage via an internal high-voltage current source).
- How does the device handle low load conditions?
The device enters frequency foldback mode and then skip mode to reduce standby consumption at low load conditions).
- What is the temperature shutdown threshold for this device?
The temperature shutdown threshold is 150°C with a hysteresis of 20°C).
- Can the NCP1076BBP100G be used in universal mains power supplies?
Yes, it is suitable for universal mains power supplies up to 28 W).
- What is the maximum current into the VCC pin?
The maximum current into the VCC pin is 15 mA).
- Does the device support line detection?
Yes, it includes line detection to prevent operation at too low an AC input voltage).
