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NCP1215A: Variable Off Time Controller

Datasheet: Low Cost Variable OFF Time Switched Mode Power Supply Controller
Rev. 4 (347.0kB)
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Product Overview
Product Description
The NCP1215A is a controller for low power off-line flyback Switched Mode Power Supplies (SMPS) featuring low size, weight and cost constraints together with a good low standby power performance. The operating principle uses switching frequency reduction at light load by increasing the OFF Time. Also, when OFF Time expands, the peak current is gradually reduced down to approximately 1/4 of the maximum peak current to prevent from exciting the transformer mechanical resonances. The risk of acoustic noise is thus greatly diminished while keeping good standby power performance.
Features
 
  • Variable OFF Time Control Method
  • Very Low Current Consumption at Start-up
  • Natural Frequency Dithering for Improved EMI Signature
  • Current Mode Control Operation
  • Peak Current Compression Reduces Transformer Noise
  • Programmable Current Sense Resistor Peak Voltage
  • Undervoltage Lockout
  • Pb-Free Packages are Available
Applications
  • Auxiliary Power Supply
  • Stand-by Power Supply
  • AC/DC Adapter
  • Off-line Battery Charger
Technical Documentation & Design Resources
Application Notes (2) Data Sheets (1)
Simulation Models (2) Package Drawings (1)
Availability and Samples
Product
Status
Compliance
Description
Package
MSL*
Container
Budgetary Price/Unit
Type
Case Outline
Type
Qty.
NCP1215ASNT1G Last Shipments 
Pb-free
Halide free
Variable Off Time Controller TSOP-6 318G-02 1 Tape and Reel 3000  
Moisture Sensitivity level (MSL) for surface mount devices (lead free measured at 260°C reflow, non lead free at 235°C reflow)
Market Leadtime (weeks) : Contact Factory
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