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Overview
| Topology | Buck Converter |
| Input voltage | 5 V |
| Output 1 | 8 V / 3 A |
| IC revision | 1 |
Description
The NCP1340 is a highly integrated quasi−resonant flyback controller suitable for designing high−performance off−line power converters. With an integrated active X2 capacitor discharge feature, the NCP1340 can enable no−load power consumption below 30 mW. The quasi−resonant current−mode flyback stage features a proprietary valley−lockout circuitry, ensuring stable valley switching. This system works down to the 6th valley and transitions to a frequency foldback mode to reduce switching losses. As the load decreases further, the NCP1340 enters quiet−skip mode to manage the power delivery. To help ensure converter ruggedness, the NCP1340 implements several key protective features such as internal brownout detection, a non−dissipative Over Power Protection (OPP) for constant maximum output power regardless of input voltage, a latched over voltage and NTC−ready over temperature protection through a dedicated pin, and line removal detection to safely discharge the X2 capacitors when the line is removed.
Features
- QR Frequency Jittering
- New Quiet-Skip Technology
- Integrated HV Startup with Brownout Protection
- Valley Switching Operation with Valley Lockout
- Integrated X2 Capacitor Discharge Capability
- NTC Compatible Fault Pin
- High Drive Capability: -500 mA / +800 mA
- Latch input for OVP and OTP implementations
Typical applications
- Medium or High Power AC-DC Adapters / Ultra High Density AC-DC Adapters
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | VR (V (AC)) | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | L (mm) | W (mm) | H (mm) | Packaging | L (µH) | IR (mA) | ISAT (A) | fres (MHz) | Version | Interface Type | Gender | Pins (Value) (pcs) | Mount | IR (mA) | Working Voltage (V (DC)) | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (Ω) | Type | VRMS (V) | VDC (V) | VBR (V) | IPeak (A) | Wmax (J) | PDiss (W) | Application | VDE Approval | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 890334022017 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-FTXX Film Capacitors | 68 nF | 310 | X2 | 400 | 0.1 | 30 GΩ | -40 °C up to +105 °C | 7.5 | 10 | 6 | 12 | Bulk | – | – | – | – | – | – | – | – | Boxed THT | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Across the mains | – | ||
 | 742792040 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | -55 °C up to +125 °C | – | 2 | 1.2 | 0.0009 | – | – | 1500 | – | – | SMT | – | – | – | SMT | 2000 | – | 600 | 700 | 150 MHz | 2000 | 0.15 | High Current | – | – | – | – | – | – | – | – | ||
| 742792096 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | -55 °C up to +125 °C | – | 2 | 1.2 | 0.9 | – | – | 800 | – | – | SMT | – | – | – | SMT | 1000 | – | 1000 | 1000 | 100 MHz | 1000 | 0.3 | High Current | – | – | – | – | – | – | – | – | ||
 | 820573011 | SPEC | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WE-VD Disk Varistor | – | – | – | – | – | – | -40 °C up to +85 °C | – | 9 | 4.1 | 12.5 | – | – | – | – | – | THT | – | – | – | THT | – | – | – | – | – | – | – | – | 300 | 385 | 470 | 1200 | 35 | 0.25 | 230 VAC | Yes | ||
 | 7447462101 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-TI Radial Leaded Wire Wound Inductor | – | – | – | – | – | – | – | – | 6 | 6 | 8.5 | – | 100 | 800 | 0.8 | 7.1 | Heat Shrinking Tube | – | – | – | THT | – | – | – | – | – | – | 0.65 | – | – | – | – | – | – | – | – | – | ||
 | 632723300011 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WR-COM USB 3.1 Type C Receptacle Horizontal THR / SMT | – | – | – | – | – | 1000 MΩ | – | – | – | – | – | Tape and Reel | – | 5000 | – | – | – | Type C | Receptacle | 24 | THR | – | 20 | – | – | – | – | – | Horizontal | – | – | – | – | – | – | USB 3.1 | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 890334022017 | SPEC | |
| 742792040 | SPEC | |
| 742792096 | SPEC | |
| 820573011 | SPEC | |
| 7447462101 | SPEC | |
| 632723300011 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | VR (V (AC)) | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | L (mm) | W (mm) | H (mm) | Packaging | L (µH) | IR (mA) | ISAT (A) | fres (MHz) | Version | Interface Type | Gender | Pins (Value) (pcs) | Mount | IR (mA) | Working Voltage (V (DC)) | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (Ω) | Type | VRMS (V) | VDC (V) | VBR (V) | IPeak (A) | Wmax (J) | PDiss (W) | Application | VDE Approval | Samples |
|---|