Overview
The NCP12510ASN65T1G is a highly integrated current-mode PWM controller designed by onsemi for use in offline power supplies. This component is packaged in a compact TSOP-6 (SOT23-6) package, making it ideal for space-constrained applications. It operates at a fixed frequency of 65 kHz and is known for its high performance and robustness, particularly in low-cost AC-DC adapters and open-frame power supplies.
The NCP12510ASN65T1G is an improved version of the popular NCP1250 flyback controller, offering enhanced features such as frequency foldback, skip-cycle in light load conditions, and internal slope compensation. It also includes advanced protection mechanisms like over power protection (OPP), over voltage protection (OVP), and short-circuit protection.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Power Supply Voltage | -0.3 | - | 35 | V |
| Oscillation Frequency (65 kHz version) | 61 | 65 | 71 | kHz |
| Oscillation Frequency (100 kHz version) | 92 | 100 | 108 | kHz |
| Maximum Duty Ratio | 76 | 80 | 84 | % |
| Internal Equivalent Feedback Resistance | - | 29 | - | kΩ |
| Over Voltage Protection (VCC pin, except D version) | 24.0 | 25.5 | 27.0 | V |
| Over Voltage Protection (VCC pin, D version only) | 30 | 32 | 34 | V |
| Internal Fault Timer Duration | 100 | 115 | 130 | ms |
Key Features
- Fixed-frequency 65 kHz or 100 kHz current-mode control operation
- Frequency foldback down to 26 kHz and skip-cycle in light load conditions
- Frequency jittering in normal and frequency foldback modes
- Internal and adjustable over power protection (OPP) circuit
- Auto-recovery over voltage protection (OVP) on the VCC pin
- Internal and adjustable slope compensation
- Internal fixed 4 ms soft-start
- Auto-recovery or latched short-circuit protection
- Pre-short ready for latched OCP version
- OVP/OTP latch input for improved robustness
- +300 mA / -500 mA source/sink drive capability
- Improved consumption and reset time in latch state
- High robustness and high ESD capabilities
- EPS 2.0 compliant
- Pb-free device
Applications
- AC-DC converters for TVs, set-top boxes, and DVD players
- Offline adapters for notebooks and netbooks
- Low-cost AC-DC adapters and open-frame power supplies
Q & A
- What is the operating frequency of the NCP12510ASN65T1G?
The NCP12510ASN65T1G operates at a fixed frequency of 65 kHz.
- What is the maximum power supply voltage for the VCC pin?
The maximum power supply voltage for the VCC pin is 35 V.
- What protection mechanisms are included in the NCP12510ASN65T1G?
The component includes over power protection (OPP), over voltage protection (OVP), and short-circuit protection.
- What is the purpose of the frequency foldback feature?
The frequency foldback feature reduces the switching frequency down to 26 kHz in light load conditions to improve efficiency.
- Is the NCP12510ASN65T1G Pb-free?
- What is the internal fault timer duration?
The internal fault timer duration is between 100 ms to 130 ms.
- What is the maximum duty ratio of the NCP12510ASN65T1G?
The maximum duty ratio is up to 84%.
- Does the NCP12510ASN65T1G support soft-start?
- What are the typical applications of the NCP12510ASN65T1G?
Typical applications include AC-DC converters for TVs, set-top boxes, DVD players, and offline adapters for notebooks and netbooks.
- Is the NCP12510ASN65T1G compliant with EPS 2.0?
