NCS37010
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3
QFN PIN DESCRIPTION
Pin # Name Pad Description
0 Ground QFN center slug
1 MLD Mains Level Detect (Zero Cross)
2 CtresGN Determines IV converter gain for detection threshold / matched to CT turns ratio (Ground−Neutral)
3 Ctbias Direct connection to the CT
4 Ctstim Direct connection to the CT
5 CTresD Determines IV converter gain for detection threshold / matched to CT turns ratio (Differential Current)
6 IDF Front end noise filter capacitor
7 GFtst Output to induce external differential current.
8 GnEN Ground−Neutral fault detection enable pin.
9 SCRtstEN SCR/solenoid self test enable pin.
10 TE Tie to Ground or leave floating.
11 PTT Push to test input.
12 LObar Load monitor input.
13 LED[0] LED[0] output driver.
14 LO Lockout SCR output driver.
15 SCRdrv Used to trigger the solenoid at a fault detection
16 Supply Power supply
TSSOP PIN DESCRIPTION
Pin # Name Pad Description
1 CTstim Differential and ground to neutral stimulus point for the current transformer.
2 Ground Ground connection for IC.
3 CTresD Determines IV converter gain for detection threshold / matched to CT turns ratio (Differential Current).
4 IDF Determines corner frequency of the differential current path filter.
5 GFtst Output to induce external differential current.
6 GnEN Ground−Neutral fault detection enable pin.
7 SCRtstEN SCR/solenoid self test enable pin.
8 TE Tie to Ground or leave floating.
9 PTT Push to test input.
10 LObar Load monitor input.
11 Ground Ground connection for IC.
12 LED[0] LED[0] output driver.
13 LO Lockout SCR output driver.
14 SCRdrv Used to trigger the solenoid at a fault detection.
15 DVDD Internal digital 5 V regulated supply.
16 AVDD Internal analog 5 V regulated supply.
17 Supply 12V shunt regulated power supply.
18 MLD Mains Level Detect (Zero Cross) and AM slope detect (for oscillator sync/trim and AM init)
19 CtresGN Determines IV converter gain for detection threshold / matched to CT turns ratio (Ground−Neutral).
20 CTbias External 2 V bias for the current transformer.
