NCP1000_06 ONSEMI [ON Semiconductor], NCP1000_06 Datasheet
NCP1000_06
Related parts for NCP1000_06
NCP1000_06 Summary of contents
Page 1
NCP1000, NCP1001, NCP1002 Integrated Off−Line Switching Regulator The NCP1000 through NCP1002 series of integrated switching regulators, combine a fixed frequency PWM controller with an integrated high voltage power switch circuit. This chip allows for simple design and minimal parts count ...
Page 2
FUNCTIONAL PIN DESCRIPTION Pin Function Feedback Input Ground 4 Startup 5 Power Switch Circuit MAXIMUM RATINGS (Notes 1 and 2) Rating Power Switch Circuit (Pin 5) Drain Voltage Range Drain Current Peak ...
Page 3
ELECTRICAL CHARACTERISTICS operating junction temperature that applies.) Characteristics OSCILLATOR Frequency (l = 1.1 mA) (Note 4) (Figure 25° 0°C to 125° −40°C to 125°C J PWM COMPARATOR Feedback Input PWM ...
Page 4
ELECTRICAL CHARACTERISTICS Characteristics POWER SWITCH CIRCUIT Power Switch Circuit On−State Resistance NCP1000 ( mA 25° 125°C (Note 8) J NCP1001 (I = 100 mA 25° 125°C ...
Page 5
Figure 2. Duty Cycle vs. FB Input Current 1000 100 Capacitance (mF) Figure 4. Charge Time vs 100 ...
Page 6
V Turn On CC 8.20 8.00 7.80 7.60 V Turn Off CC 7.40 7.20 −40 − Temperature (°C) Figure 8. V /UVLO Threshold vs. CC Temperature 25.0 20.0 NCP1000 15.0 NCP1001 10.0 5.0 NCP1002 0.0 ...
Page 7
Temperature (°C) Figure 14. Maximum Duty Cycle Feedback Current vs. Temperature 1600 1400 1200 1000 800 600 400 200 0 0 NCP1000, NCP1001, NCP1002 14.0 12.0 10.0 ...
Page 8
Introduction The NCP1000 thru NCP1002 represent a new higher level of integration by providing on a single monolithic chip all of the active power, control, logic, and protection circuitry required to implement a high voltage flyback or forward converter. This ...
Page 9
Current Limit Comparator and Power Switch Circuit The NCP1000 series uses cycle−by−cycle current limiting as a means of protecting the output switch transistor from overstress. Current limiting is implemented by monitoring the instantaneous output switch current during conduction, and upon ...
Page 10
Figure 20 shows the timing waveforms in auto restart mode. The V pin receives its startup power from the high CC voltage startup circuit. Once the undervoltage lockout trip point is exceeded, the high voltage startup ...
Page 11
Applications Do not attempt to construct a converter circuit on a wire−wrap or plug−in prototype board. In order to ensure proper device operation and stability important to minimize the lead length and the associated inductance of the ground ...
Page 12
Feedback Input (R Voltage) fb Oscillator Ramp Oscillator Duty Cycle Oscillator Clock PWM Comparator Output PWM Latch Q Output Power Switch Circuit Gate Drive Leading Edge Blanking Input (Power Switch Circuit Current) Zero Duty Cycle Figure 18. Pulse Width Modulation ...
Page 13
Hysteretic Regulation Startup Circuit On Off I I start CC1 V Limiter CC (Pin 1) Power Switch Circuit Voltage (Pin 5) Switching Disabled Switching Startup Figure 20. Auto Restart Operation Timing Diagram APPLICATION #1: Offline Converter Provides 5.0 V, ...
Page 14
F −A− NOTE 2 −T− N SEATING PLANE 0.13 (0.005) The products described herein (NCP1000, 1001, 1002), may be covered by one or more of the following U.S. patents: 4,553,084; 5,418,410; 5,477,175; 5,760,639; ...