PWM Current-Mode Controller for Free Running Quasi-Resonant Operation -...
Price comparison from authorized distributors
NCP1207A Competitive Prices
EmbedIC has the unique source of supply. We can offer NCP1207A more competitive price for our customers. You can enjoy our best service by purchasing ON NCP1207A, Please feel free to contact for the best price of NCP1207A Controller. Click To Get Quotation
The NCP1207A/B combines a true current mode modulator and a demagnetization detector to ensure full borderline/critical Conduction Mode in any load/line conditions and minimum drain voltage switching (Quasi-Resonant operation). Due to its inherent skip cycle capability, the controller enters burst mode as soon as the power demand falls below a predetermined level. As this happens at low peak current, no audible noise can be heard. For the NCP1207A, an internal 8.0μs timer prevents the free-run frequency to exceed 125 kHz (therefore below the 150 kHz CISPR-22 EMI starting limit), while the skip adjustment capability lets the user select the frequency at which the burst foldback takes place. For the NCP1207B, the internal timer duration is reduced to 4.5 s to allow operation at higher frequencies (up to 200 kHz).
• Free-Running Borderline/Critical Mode Quasi-Resonant Operation
• Current-Mode with Adjustable Skip-Cycle Capability
• No Auxiliary Winding VCC Operation
• Auto-Recovery Overcurrent Protection
• Latching Overvoltage Protection
• External Latch Triggering, e.g. Via Overtemperature Signal
• 500 mA Peak Current Source/Sink Capability
• Undervoltage Lockout for VCC Below 10 V
• Internal 1.0 ms Soft-Start
• Internal 8.0μs Minimum TOFF for NCP1207A,
4.5 s Minimum TOFF for NCP1207B
• Adjustable Skip Level
• Internal Temperature Shutdown
• Direct Optocoupler Connection
• SPICE Models Available for TRANsient Analysis
• Pb-Free Packages are Available
Typical Applications
• AC/DC Adapters for Notebooks, etc.
• Offline Battery Chargers
• Consumer Electronics (DVD Players, Set-Top Boxes, TVs, etc.)
• Auxiliary Power Supplies (USB, Appliances, TVs, etc.)
Manufacturer: NXP
IC MPU I.MX31 532MHZ 457MAPBGA
Product Categories: MPU
Lifecycle:
RoHS:
Manufacturer: Microchip
IC MCU 8BIT 3.5KB FLASH 14TSSOP
Product Categories: 8bit MCU
Lifecycle:
RoHS:
Looking forward to your comment
Comment
8 Bit MCU, Flash, PIC16 Family PIC16F7XX Series Microcontrollers, 20 MHz, 7 KB, ...
EEPROM 2K 256 X 8 2.5V SERIAL EE IND
System-On-Modules - SOM RCM2200
32-bit Arm Cortex-A53 vision processor with ISP, powerful 3D GPU, dual APEX-2 v...
IC MCU 8BIT 60KB FLASH 44QFP
DSP 20MHZ 44QFP
1
2
3
4
5
6