Overview
The NCP12510CSN65T1G 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 applications where space is limited. It operates at a fixed frequency of 65 kHz and features advanced protection mechanisms, including over power protection (OPP), over voltage protection (OVP), and short-circuit protection. The NCP12510CSN65T1G is an improved and pin-compatible version of the popular NCP1250 flyback controller, offering enhanced performance and robustness.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC Power Supply Voltage | -0.3 to 35 | V |
| Oscillation Frequency (nominal) | 65 kHz | kHz |
| Maximum Duty Ratio | 76 to 84 | % |
| Internal Equivalent Feedback Resistance | 29 kΩ | kΩ |
| Over Voltage Protection (VCC pin) | 24.0 to 27.0 | V |
| Short-Circuit Protection Delay Time | 600 ns | ns |
| Soft-Start Time | 4 ms | ms |
| DRV Pin Voltage (maximum) | 35 V | V |
| Operating Temperature Range | -40 to 125 | °C |
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
- Open-frame power supplies
Q & A
- What is the operating frequency of the NCP12510CSN65T1G? The NCP12510CSN65T1G 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.
- Does the NCP12510CSN65T1G have over voltage protection? Yes, it has auto-recovery over voltage protection (OVP) on the VCC pin.
- 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 NCP12510CSN65T1G Pb-free? Yes, the NCP12510CSN65T1G is a Pb-free device.
- What is the soft-start time of the NCP12510CSN65T1G? The soft-start time is 4 ms.
- Does the NCP12510CSN65T1G support short-circuit protection? Yes, it supports auto-recovery or latched short-circuit protection.
- What is the maximum duty ratio of the NCP12510CSN65T1G? The maximum duty ratio is between 76% and 84%.
- Is the NCP12510CSN65T1G compliant with EPS 2.0? Yes, it is EPS 2.0 compliant.
- What is the package type of the NCP12510CSN65T1G? The NCP12510CSN65T1G is packaged in a TSOP-6 (SOT23-6) package.
