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FAN4146: Ground Fault Interupter
The FAN4146 is a low-power controller for AC outlet Appliance Leakage Circuit Interrupters (ALCI) and two-wire Residual Current Devices (RCD). The FAN4146 detects hazardous grounding conditions and open circuits the line before a harmful shock occurs.
Internally, the FAN4146 contains a diode rectifier, precision bandgap 12V shunt regulator, precision low VOS offset-sense amplifier, time delay noise filter, window-detection comparators, and a SCR driver. With the addition of a minimum number of external components, the FAN4146 detects and protects against a hot-wire-to-ground fault. The minimum number of components and the small SuperSOT™ package allow for a small-form-factor, low-cost application solution.
The FAN4146 circuitry has a built-in rectifier and shunt regulator that operates with a low quiescent current. This allows for a high-value, low-wattage-series supply resistor. The internal temperature compensated shunt regulator, sense amplifier, and bias circuitry provide for precision ground-fault detection. The low VOS offset-sense amplifier allows direct coupling of the sense coil to the amplifier’s feedback signal. This eliminates the large 50/60Hz AC-coupling capacitor. The internal delay filter rejects high-frequency noise spikes common with inductive loads. This decreases false nuisance tripping. The internal SCR driver is temperature compensated and designed to satisfy the current requirements for a wide selection of external SCRs.
The minimum number of external components and the 6-pin SuperSOT™ package enable for a low-cost, compact design and layout. The FAN4146ESX is an enhanced temperature range device.
| FAN4146 Datasheet |
Features
- For Two-Wire ALCI and RCD Applications
- Precision Sense Amplifier and Bandgap Reference
- Built-in AC Rectifier
- Direct DC Coupled to Sense Coil
- Built-in Noise Filter
- Low-Voltage SCR Disable
- SCR Gate Driver
- Adjustable Sensitivity
- Minimum External Components
- Meets UL 943B Requirements
- Ideal for 120V or 220V Systems
- Space-Saving SuperSOT™ 6-Pin Package
| Product | Product & Eco Status | Unit Price/1K Order | Packing Method Convention | Package Marking Convention* |
|---|---|---|---|---|
| FAN4146ESX | Full Production Green as of Sep 2010 China RoHS | $0.546 | SSOT 6L
-
0.97 x 4.22 x 1.6mm,
TAPE REEL
| Line 1&E (Space) &E (Space) &E (Space) &Y (Binary Calendar Year Coding)
Line 2&O (Plant Code) |
| FAN4146SX | Full Production Green as of Dec 2009 China RoHS | $0.52 | SSOT 6L
-
0.97 x 4.22 x 1.6mm,
TAPE REEL
| Line 1&E (Space) &E (Space) &Y (Binary Calendar Year Coding)
Line 2&O (Plant Code) |
- SSOT 6L Drawing Last Update: Feb 2017
- SOT Tape and Reel Packing Drawing Last Update: Oct 2016
