NCP1253BSN65T1G
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | SOT-23-6 Thin, TSOT-23-6 |
| Mfr | onsemi |
| Mounting Type | Surface Mount |
| Operating Temperature | 150°C (TJ) |
| Voltage - Breakdown | - |
| Supplier Device Package | 6-TSOP |
| Fault Protection | Current Limiting, Open Loop, Over Voltage, Short Circuit |
| Topology | Flyback |
| Voltage - Supply (Vcc/Vdd) | 8.8V ~ 28V |
| Control Features | Frequency Control, Soft Start |
| Frequency - Switching | 65kHz |
| Internal Switch(s) | No |
| Voltage - Start Up | 18 V |
| Duty Cycle | 80% |
| Output Isolation | Isolated |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | NCP1253 |
| REACH Status | REACH Unaffected |
| Other Names | 488-NCP1253BSN65T1GTR |
| Standard Package | 3,000 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
NCP1253BSN65T1G PWM controller
The NCP1253BSN65T1G from onsemi is a high-performance current-mode PWM controller designed for offline power supplies requiring minimal external components and low standby power consumption. This advanced controller operates from a wide input voltage range of 12V to 28V and features a fixed operating frequency of 65 kHz with ±5% accuracy, making it ideal for AC-DC adapters, LCD TV power supplies, and server power units where efficiency and reliability are critical. Housed in a compact SOIC-8 package, the device incorporates a high-voltage startup circuit that eliminates the need for an auxiliary winding, along with a proprietary soft-start function that prevents output overshoot during startup. The NCP1253BSN65T1G implements comprehensive protection features including brown-out detection, over-voltage protection, and over-power compensation, while its current-mode control architecture provides excellent line and load regulation with cycle-by-cycle current limiting for enhanced system safety.
NCP1253BSN65T1G PWM controller Applications
The NCP1253BSN65T1G is extensively used in switch-mode power supplies for consumer electronics including laptop adapters, LCD monitors, and set-top boxes where its integrated high-voltage startup circuit reduces component count and board space requirements. Industrial applications include auxiliary power supplies for motor drives, PLC systems, and industrial controllers benefiting from the device's robust protection features and wide operating temperature range. Server and networking equipment utilize the controller for redundant power supplies and power distribution units where reliability and efficiency are paramount.
Alternative Current-Mode PWM Controller Recommendations
● TNY280PN (Power Integrations): An integrated switcher IC combining a 700V power MOSFET and controller in a single package for ultra-compact power supplies.
● FAN7602B (ON Semiconductor): A current-mode PWM controller with 100 kHz operation and built-in slope compensation for wide input range applications.
● UC2845BN (Texas Instruments): A industry-standard current-mode PWM controller with 500 kHz maximum frequency and ±1% reference accuracy.
● LNK364GN (Power Integrations): An energy-efficient switcher IC with auto-restart protection and 36V output capability for low-power applications.
