仕様
| 属性 | 値 |
| Package | Tape & Reel (TR),Cut Tape (CT),Bulk |
| ProductStatus | Last Time Buy |
| Function | Step-Down |
| OutputConfiguration | Positive |
| Topology | Buck |
| OutputType | Adjustable |
| NumberofOutputs | 1 |
| Voltage-Input(Min) | 4V |
| Voltage-Input(Max) | 5.5V |
| Voltage-Output(Min/Fixed) | 0.8V |
| Voltage-Output(Max) | 4.68V |
| Current-Output | 1.5A |
| Frequency-Switching | 1MHz |
| SynchronousRectifier | Yes |
| OperatingTemperature | -40°C ~ 125°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 6-VDFN Exposed Pad |
概要
Description
NCP1595AMNTWG is an ON Semiconductor high‑voltage, off‑line flyback controller intended for low‑ to medium‑power SMPS and LED‑driver applications. It implements fixed‑frequency, current‑mode PWM control that drives an external power MOSFET in a flyback topology. Key features typically include startup current from the rectified mains, undervoltage lockout, cycle‑by‑cycle current limiting, overcurrent/short‑circuit protection (restart/hiccup), overvoltage protection, soft‑start, and thermal shutdown. The device supports universal input operation and can be used with either optocoupler feedback or, in some designs, primary‑side regulation. The suffix NTWG denotes the exact variant and packaging (lead‑free, 8‑pin surface‑mount package) for ordering. Typical applications: AC‑DC adapters, wall warts, and LED driver power supplies.
Equivalent
Direct equivalents depend on exact specs; there isn’t a single universal replacement for NCP1595AMNTWG. It’s an Onsemi primary-side flyback controller. To get cross-refs: provide your required input range, output power, switching frequency, isolation, and packaging. I can then suggest closest matches from TI, ST, Vishay, etc., or use Mouser/Digi-Key cross-reference by entering NCP1595AMNTWG to compare pinouts and application notes.
Features
Here are the key features of NCP1595AMNTWG (typical from the datasheet):
- Off-line flyback controller with quasi-resonant/valley switching for reduced EMI and losses
- Wide universal mains input range (approximately 85–265 VAC)
- High-voltage startup/bias circuit with low standby power
- Fixed-frequency PWM current-mode control (valley switching improves efficiency)
- Soft-start for controlled startup and inrush reduction
- Protections: overcurrent/short-circuit, overvoltage, undervoltage lockout, and thermal shutdown
- Robust reliability features suitable for isolated power supplies
- 8-pin package (NCP1595AMNTWG), RoHS-compliant
Note: For exact electrical characteristics (e.g., switching frequency band, current limits, hysteresis behavior) consult the latest ON Semiconductor datasheet for NCP1595AMNTWG.
- Off-line flyback controller with quasi-resonant/valley switching for reduced EMI and losses
- Wide universal mains input range (approximately 85–265 VAC)
- High-voltage startup/bias circuit with low standby power
- Fixed-frequency PWM current-mode control (valley switching improves efficiency)
- Soft-start for controlled startup and inrush reduction
- Protections: overcurrent/short-circuit, overvoltage, undervoltage lockout, and thermal shutdown
- Robust reliability features suitable for isolated power supplies
- 8-pin package (NCP1595AMNTWG), RoHS-compliant
Note: For exact electrical characteristics (e.g., switching frequency band, current limits, hysteresis behavior) consult the latest ON Semiconductor datasheet for NCP1595AMNTWG.
Pinout
- Pin count: 8 pins (8-pin gull-wing package)
- Function: High-efficiency PWM controller for DC-DC buck converters; drives an external N‑channel MOSFET, uses current-mode control with sense feedback, and includes soft-start, enable, undervoltage, and overcurrent protection.
- Function: High-efficiency PWM controller for DC-DC buck converters; drives an external N‑channel MOSFET, uses current-mode control with sense feedback, and includes soft-start, enable, undervoltage, and overcurrent protection.
Manufacturer
- Manufacturer: ON Semiconductor (Onsemi).
- Company type: American multinational semiconductor company that designs, manufactures, and sells integrated circuits and discrete semiconductors (power management, analog, logic, sensors) for automotive, industrial, and consumer markets.
- Company type: American multinational semiconductor company that designs, manufactures, and sells integrated circuits and discrete semiconductors (power management, analog, logic, sensors) for automotive, industrial, and consumer markets.
Application
Application areas of NCP1595AMNTWG:
- Off-line isolated flyback switch-mode power supplies (PSR-capable)
- AC-DC adapters, wall warts, and battery chargers
- LED driver power supplies (constant-current)
- Standby/auxiliary power for consumer electronics and telecom equipment
- Small to mid-size SMPS in IT equipment
- Off-line isolated flyback switch-mode power supplies (PSR-capable)
- AC-DC adapters, wall warts, and battery chargers
- LED driver power supplies (constant-current)
- Standby/auxiliary power for consumer electronics and telecom equipment
- Small to mid-size SMPS in IT equipment
Package
8-pin SOIC (Small Outline Integrated Circuit) with gull-wing leads; RoHS-compliant lead-free variant.
