FAN4146 Ground Fault Interrupter Description 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. www.onsemi.com Internally, the FAN4146 contains a diode rectifier, precision bandgap 12V shunt regulator, precision low V offset-sense OS 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- 1 to-ground fault. The minimum number of components and the small TSOT23 6-Lead SUPERSOT package allow for a small-form-factor, low-cost CASE 419BL application solution. The FAN4146 circuitry has a built-in rectifier and shunt regulator MARKING DIAGRAM that operates with a low quiescent current. This allows for ahigh-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 V OS XXX M offset-sense amplifier allows direct coupling of the sense coil to the amplifiers feedback signal. This eliminates the large 50/60Hz 1 AC-coupling capacitor. The internal delay filter rejects XXX = Specific Device Code high-frequency noise spikes common with inductive loads. This M = Date Code decreases false nuisance tripping. The internal SCR driver is = Pb-Free Package 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 ORDERING INFORMATION SUPERSOT package enable for a low-cost, compact design and See detailed ordering and shipping information on page 9 of layout. The FAN4146ESX is an enhanced temperature range device. this data sheet. 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 120 V or 220 V Systems Space-saving SUPERSOT 6-pin Package These Devices are Pb-Free and are RoHS Compliant Applications Personal Care Products Two-wire Electrical Outlets, Circuit Breakers, and Power Cords Requiring GFI Safety Features ALCI and RCCB Circuits Semiconductor Components Industries, LLC, 2010 1 Publication Order Number: March, 2019 Rev. 2 FAN4146/DFAN4146 TYPICAL APPLICATIONS TEST R TEST Sense Coil 1:1000 Load Hot Line Hot Load Neutral Line Neutral R IN MOV Q1 R SET AmpOut SCR C1 Neutral VFB R1 Line VREF Typical Values: R : 470 R1: 91 k (Wattage Determined by Maximum V ) IN AC C1: 22 nF R : 15 k TEST R : 511 k (Note 1) SET Notes: 1. Value depends on sense-coil characteristics and application (value chosen for 5 mA trip threshold). 2. Contact ON Semiconductor for best application practices for nuisance tripping rejection. Figure 1. 120/220 V ALCI Application (Note 2) AC TEST R TEST Sense Coil 1:1300 Load Hot Line Hot Load Neutral Line Neutral MOV R IN Q1 R SET AmpOut SCR C1 VFB Neutral C2 Line VREF R1 Typical Values: R : 324 k (Note 3) C1: 22 nF R1: 174 k (Wattage Determined by Maximum V ) SET AC R : 470 C2: 10 nF R : 15 k IN TEST Notes: 3. Value depends on sense-coil characteristics and application (value chosen for 10 mA trip threshold). 4. Contact ON Semiconductor for best application practices for nuisance tripping rejection. Figure 2. 220 V RCD Application (Note 4) AC www.onsemi.com 2 FAN4146 FAN4146ES Solenoid Solenoid