Overview
The NCP1230D165R2G, produced by onsemi, is a high-performance PWM (Pulse Width Modulation) controller designed for medium to high power switched-mode power supplies. This device is particularly suited for applications such as notebook adapters, off-line battery chargers, and consumer electronics equipment. It features a compact 7-pin SOIC package and integrates all necessary control functionality to build efficient and rugged power supplies. The NCP1230D165R2G is known for its low standby power consumption and advanced protection features, making it an ideal choice for modern power supply designs.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Section Turn-On Threshold Level | VCCOFF | 11.6 | 12.6 | 13.6 | V |
| Minimum Operating Voltage after Turn-On | VCC(min) | 7.0 | 7.7 | 8.4 | V |
| VCC Decreasing Level at which the Latch-Off Phase Ends | VCClatch | 5.0 | 5.6 | 6.2 | V |
| Internal IC Consumption, No Output Load | ICC1 | 0.6 | 1.1 | 1.8 | mA |
| Internal Oscillator Oscillation Frequency (65 kHz Version) | fOSC | 58 | 65 | 72 | kHz |
| Maximum Duty-Cycle | Dmax | 75 | 80 | 85 | % |
| Temperature Shutdown, Maximum Value | TSD | 150 | 165 | - | °C |
| Drive Output Current Capability | - | - | +500 / -800 | mA |
Key Features
- Current-Mode Operation with Internal Ramp Compensation: Ensures stable and efficient operation of the power supply.
- Internal High-Voltage Startup Current Source: Provides lossless startup and eliminates the need for external startup circuitry.
- Extremely Low No-Load Standby Power: Reduces power consumption during standby modes.
- Skip-Cycle Capability at Low Peak Currents: Prevents acoustic noise and optimizes performance at light loads.
- Direct Connection to PFC Controller: Improves no-load standby power by disabling the PFC circuit during standby.
- Internal 2.5 ms Soft-Start: Reduces inrush current and ensures smooth startup.
- Internal Leading Edge Blanking: Protects against noise and false triggering.
- Latched Primary Overcurrent and Overvoltage Protection: Provides robust protection against faults.
- Short-Circuit Protection Independent of Auxiliary Level: Ensures protection even in abnormal conditions.
- Internal Frequency Jittering for Improved EMI Signature: Reduces electromagnetic interference.
Applications
- Notebook Adapters: Ideal for powering portable electronics efficiently.
- Off-Line Battery Chargers: Suitable for charging batteries in various consumer electronics.
- Consumer Electronics Equipment: Used in set-top boxes, TVs, and computer monitors.
- Power Factor Correction (PFC) Controllers: Can be directly connected to PFC controllers for improved efficiency.
Q & A
- What is the primary function of the NCP1230D165R2G?
The NCP1230D165R2G is a PWM controller designed for medium to high power switched-mode power supplies, providing all necessary control functionality for efficient and rugged power supply designs.
- What are the key benefits of the internal high-voltage startup current source?
The internal high-voltage startup current source provides lossless startup and eliminates the need for external startup circuitry, reducing component count and power consumption.
- How does the skip-cycle capability work?
The skip-cycle capability prevents the current from decreasing below 25% of the maximum peak current, reducing acoustic noise and optimizing performance at light loads.
- What is the purpose of the internal leading edge blanking feature?
The internal leading edge blanking feature protects against noise and false triggering, ensuring reliable operation of the power supply.
- How does the NCP1230D165R2G protect against overcurrent and overvoltage conditions?
The device features latched primary overcurrent and overvoltage protection, as well as short-circuit protection independent of auxiliary level, providing robust fault protection.
- What is the significance of internal frequency jittering?
Internal frequency jittering reduces electromagnetic interference (EMI), improving the overall EMI signature of the power supply.
- What are the typical operating voltage ranges for the NCP1230D165R2G?
The device operates with a minimum operating voltage of 7.0 V and a turn-on threshold level of 11.6 V to 13.6 V.
- How does the soft-start feature work?
The internal 2.5 ms soft-start feature reduces inrush current and ensures a smooth startup of the power supply.
- What is the maximum duty cycle of the NCP1230D165R2G?
The maximum duty cycle is 75% to 85%.
- What is the temperature shutdown threshold for the NCP1230D165R2G?
The temperature shutdown threshold is 150°C to 165°C.
