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NCP1203: PWM Controller, Fixed Frequency, Flyback, Current Mode

Overview
Specifications
Packages
Applications
Datasheet: PWM Controller, Fixed Frequency, Flyback, Current Mode
Rev. 12 (251kB)
Product Overview
»View Reliability Data
»View Material Composition
»Product Change Notification (10)
Housed in SO-8 or DIP8 package, the NCP1203 represents a major leap toward ultra-compact Switch-Mode Power Supplies and represents an excellent candidate to replace the UC384X devices.Thanks to its proprietary SmartMOS Very High Voltage Technology, the circuit allows the implementation of complete off-line AC/DC adapters, battery charger and a high-power SMPS with few external components.

With an internal structure operating at a fixed 40 kHz, 60 kHz or 100 kHz switching frequency, the controller features a high-voltage start-up FET which ensures a clean and loss-less start up sequence. Its current-mode control naturally provides good audio susceptibility and inherent pulse-by-pulse control.

When the current set point falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so-called skip cycle mode and provides improved efficiency at light loads while offering excellent performance in standby conditions. Because this occurs at a user adjustable low peak current, no acoustic noise takes place.

The NCP1203 also includes an efficient protective circuitry which, in presence of an output over load condition, disables the output pulses while the device enters a safe burst mode, trying to restart. Once the default has gone, the device auto-recovers. Finally, atemperature shutdown with hysteresis helps building safe and robust power supplies.
Features
 
  • High-Voltage Start Up Current Source
  • Auto-Recovery Internal Output Short-Circuit Protection
  • Extremely Low No-Load Standby Power
  • Current-Mode with Adjustable Skip-Cycle Capability
  • Internal Leading Edge Blanking
  • 250 mA Peak Current Capability
  • Internally Fixed Frequency at 40 kHz, 61 kHz and 100 kHz
  • Direct Optocoupler Connection
  • Undervoltage Lockout at 7.6 V Typical
  • SPICE Models Available for TRANsient and AC Analysis
  • Pin to Pin Compatible with NCP1200
  • Pb-Free Packages are Available
Applications
  • AC/DC Adapters for Notebooks, etc.
  • Offline Battery Chargers
  • Auxiliary Power Supplies (USB, Appliances, TVs, etc.)
Availability and Samples
Product
Status
Compliance
Description
Package
MSL*
Container
Budgetary Price/Unit
Type
Case Outline
Type
Qty.
NCP1203D100R2G Active
Pb-free
Halide free
PWM Controller, Fixed Frequency, Flyback, Current Mode SOIC-8 751-07 1 Tape and Reel 2500 $0.4093
NCP1203D40R2G Active
Pb-free
Halide free
PWM Controller, Fixed Frequency, Flyback, Current Mode SOIC-8 751-07 1 Tape and Reel 2500 $0.4093
NCP1203D60R2G Active
Pb-free
Halide free
PWM Controller, Fixed Frequency, Flyback, Current Mode SOIC-8 751-07 1 Tape and Reel 2500 $0.4093
NCP1203P100G Active
Pb-free
Halide free
PWM Controller, Fixed Frequency, Flyback, Current Mode PDIP-8 626-05 NA Tube 50 $0.4467
NCP1203P40G Active
Pb-free
Halide free
PWM Controller, Fixed Frequency, Flyback, Current Mode PDIP-8 626-05 NA Tube 50 $0.4467
NCP1203P60G Active
Pb-free
Halide free
PWM Controller, Fixed Frequency, Flyback, Current Mode PDIP-8 626-05 NA Tube 50 $0.4467
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) : 17 to 20
Arrow   (Wed Mar 22 19:04:23 MST 2017) : 22
Digikey   (2017-03-22) : >1K
Mouser   (2017-03-22) : >1K
PandS   (2017-03-22) : >10K
Market Leadtime (weeks) : 2 to 4
Arrow   (Wed Mar 22 19:04:23 MST 2017) : 92
Mouser   (2017-03-22) : >1K
ON Semiconductor   (2017-03-22) : 7,500
PandS   (2017-03-22) : >1K
Market Leadtime (weeks) : 4 to 8
Arrow   (Wed Mar 22 19:04:23 MST 2017) : 9990
Digikey   (2017-03-22) : >1K
Mouser   (2017-03-22) : >1K
PandS   (2017-03-22) : >1K
Market Leadtime (weeks) : 2 to 4
Arrow   (Wed Mar 22 19:04:23 MST 2017) : 793
Digikey   (2017-03-22) : <1K
Mouser   (2017-03-22) : <1K
ON Semiconductor   (2017-03-22) : 16,950
PandS   (2017-03-22) : >1K
Market Leadtime (weeks) : 2 to 4
Arrow   (Wed Mar 22 19:04:23 MST 2017) : 69
Mouser   (2017-03-22) : <1K
ON Semiconductor   (2017-03-22) : 9,600
PandS   (2017-03-22) : <100
Market Leadtime (weeks) : 8 to 12
Arrow   (Wed Mar 22 19:04:24 MST 2017) : 40
Digikey   (2017-03-22) : <1K
FutureElectronics   (2017-03-22) : <1K
Mouser   (2017-03-22) : <1K
PandS   (2017-03-22) : >10K
Wpi   (2017-03-22) : <1K
Datasheet: PWM Controller, Fixed Frequency, Flyback, Current Mode
Rev. 12 (251kB)
Product Overview
»View Reliability Data
»View Material Composition
»Product Change Notification (10)

Product Compliance Status Description Topology Control Mode fsw Typ (kHz) Stand-by Mode UVLO (V) Short Circuit Protection Latch Soft Start VCC Max (V) Drive Cap. (mA) Package Type
Pb-free
Halide free
 Active     PWM Controller, Fixed Frequency, Flyback, Current Mode 
Flyback
Current Mode
100
Yes
Yes
Yes
No
No
16
250
SOIC-8
Pb-free
Halide free
 Active     PWM Controller, Fixed Frequency, Flyback, Current Mode 
Flyback
Current Mode
40
Yes
Yes
Yes
No
No
16
250
SOIC-8
Pb-free
Halide free
 Active     PWM Controller, Fixed Frequency, Flyback, Current Mode 
Flyback
Current Mode
60
Yes
Yes
Yes
No
No
16
250
SOIC-8
Pb-free
Halide free
 Active     PWM Controller, Fixed Frequency, Flyback, Current Mode 
Flyback
Current Mode
100
Yes
Yes
Yes
No
No
16
250
PDIP-8
Pb-free
Halide free
 Active     PWM Controller, Fixed Frequency, Flyback, Current Mode 
Flyback
Current Mode
40
Yes
Yes
Yes
No
No
16
250
PDIP-8
Pb-free
Halide free
 Active     PWM Controller, Fixed Frequency, Flyback, Current Mode 
Flyback
Current Mode
60
Yes
Yes
Yes
No
No
16
250
PDIP-8
Previously Viewed Products
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