NCS37012: Single CT UL943 GFCI with Self Test
The NCS37012 is a fully UL943 compliant signal processor for GFCI applications with self test. The device integrates a flexible power supply (including both shunt and LDO regulators), differential fault, and grounded-neutral detection circuits. Proprietary impedance measurement and signal processing techniques are used to minimize the number of external components and improve performance. The device also includes a specialized DSP controller that offers best in class immunity to nuisance loads without the need for external analog filters. Self-test is monitored every 17 minutes through an external current path and internally generated grounded neutral fault.
Features- full self test and trip indicator monitoring
- self syncing internal oscillator adjusts to AC mains frequency to guarantee full resolution on 50 and 60Hz distribution systems
- randomized testing sequence to noise sensitivity and potential interactions on the AC mains
- high SCR drive current (up to 5mA)
| Benefits- fully compliant with UL self test requirements and minimal BOM impact
- compatible with global AC power systems
- robust design
- compatible with high Igt SCR's for improved noise immunity
|
Applications- UL943 compliant GFCI products
| End Products- GFCI receptacles
- GFCI circuit breakers
- GFCI power cords
|
Data Sheets (1)
Package Drawings (2)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCS37012DBRG | Active | Pb-free
Halide free | TSSOP-20 | 948AD | 3 | Tape and Reel | 2500 | $0.8 |
| NCS37012MNTWG | Active | Pb-free
Halide free | QFN-16 | Contact BDTIC | 3 | Tape and Reel | 3000 | $0.8 |
Specifications
| Product | Channels | VCC Min (V) | VCC Max (V) | IT Max (mA) | VI Typ (V) | TA Min (°C) | TA Max (°C) |
|---|
| NCS37012DBRG | 1 | 6 | 12 | 2.2 | 1.8 | -40 | 85 |
| NCS37012MNTWG | 1 | 6 | 12 | 2.2 | 1.8 | -40 | 85 |
