NCP1077: High Voltage Switching Regulator for Offline SMPS
The NCP1076 / NCP1077 products integrate a fixed frequency current mode controller with a 700 V MOSFET. Available in a PDIP-7 or SOT-223 package, the NCP1076/7 offer a high level of integration, including soft-start, frequency-jittering, short-circuit protection, skip-cycle, a maximum peak current set point, ramp compensation, and a Dynamic Self-Supply (eliminating the need for an auxiliary winding). Unlike other monolithic solutions, the NCP1076/7 is quiet by nature: during nominal load operation, the part switches at one of the available frequencies (65, 100 or 130 kHz). When the output power demand diminishes, the IC automatically enters frequency foldback mode and provides excellent efficiency at light loads. When the power demand reduces further, it enters into a skip mode to reduce the standby consumption down to a no load condition. Protection features include: a timer to detect an overload or a short-circuit event, Overvoltage Protection with auto-recovery and AC input line voltage detection. For improved standby performance, the connection of an auxiliary winding stops the DSS operation and helps to reduce input power consumption below 50 mW at high line.
Features- Integrated 700 V MOSFET with RDS(on) of 4 Ω
- Current-Mode Fixed Frequency Operation (65/100/130 kHz)
- Peak Current: NCP1076 = 650mA / NCP1077 = 800 mA
- Skip-Cycle Operation at Low Peak Current
- Dynamic Self-Supply (DSS)
- Auto-Recovery Output Short Circuit Protection with Timer-Based Detection
- Frequency Foldback Operation
- 300A No Load Power Consumption
- Frequency Jittering (including during frequency foldback mode)
- AC Input Voltage Line Detection
| Benefits- Up to 30W output SMPS design capability
- Ability to scale for efficiency or size
- Adjust output current protection based on output power demand
- Eliminate acoustic noise
- Eliminate Aux winding
- Provides more robust protection without worrying about the coupling of the aux winding
- Improved efficiency at light load / Improved EMI over the entire load
- <50mW no Load Power Consumption
- Better EMI Signature Over the Entire Operating Range
- Enhanced Protection Against Faults With Low Input Voltage
|
Applications- Auxiliary Supply
- Isolated Standby Power Supply
| End Products- White Goods
- E-Meters
- Industrial
|
Design & Development Tools (1)
Package Drawings (2)
Evaluation Board Documents (4)
Data Sheets (1)
Evaluation/Development Tool Information
| Product | Status | Compliance | Short Description |
|---|
| NCP1077STGEVB | Active | Pb-free | Power Supply Evaluation Board, 12 V, 20 W |
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCP1077P065G | Active | Pb-free
Halide free | PDIP-7 | 626A-01 | NA | Tube | 50 | $0.37 |
| NCP1077P100G | Active | Pb-free
Halide free | PDIP-7 | 626A-01 | NA | Tube | 50 | $0.37 |
| NCP1077P130G | Active | Pb-free
Halide free | PDIP-7 | 626A-01 | NA | Tube | 50 | $0.37 |
| NCP1077STAT3G | Active | Pb-free
Halide free | SOT-223-4 / TO-261-4 | 318E-04 | 1 | Tape and Reel | 4000 | $0.36 |
| NCP1077STBT3G | Active | Pb-free
Halide free | SOT-223-4 / TO-261-4 | 318E-04 | 1 | Tape and Reel | 4000 | $0.36 |
| NCP1077STCT3G | Active | Pb-free
Halide free | SOT-223-4 / TO-261-4 | 318E-04 | 1 | Tape and Reel | 4000 | $0.36 |
Specifications
| Product | Control Mode | fsw Typ (kHz) | fJitter Typ (%) | Stand-by Mode | RDS(ON) Typ (Ω) | V(BR)DSS Max (V) | IPeak (mA) | HV Start-up Min (V) | DSS (mA) | UVLO | Short Circuit Protection | Over Power Compensation | Brown-out | Latch |
|---|
| NCP1077P065G | Current Mode | 65 | Yes | Yes | 4 | 700 | 800 | Yes | 8 | 6.4 | Yes | No | No | No |
| NCP1077P100G | Current Mode | 100 | Yes | Yes | 4 | 700 | 800 | Yes | 8 | 6.4 | Yes | No | No | No |
| NCP1077P130G | Current Mode | 130 | Yes | Yes | 4 | 700 | 800 | Yes | 8 | 6.4 | Yes | No | No | No |
| NCP1077STAT3G | Current Mode | 65 | Yes | Yes | 4 | 700 | 800 | Yes | 8 | 6.4 | Yes | No | No | No |
| NCP1077STBT3G | Current Mode | 100 | Yes | Yes | 4 | 700 | 800 | Yes | 8 | 6.4 | Yes | No | No | No |
| NCP1077STCT3G | Current Mode | 130 | Yes | Yes | 4 | 700 | 800 | Yes | 8 | 6.4 | Yes | No | No | No |
