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| www..com A1780 general features The A1780 is a dimmer IC for halogen lamps. It uses an integrated time controller to control a wide range of DMOS switches, and includes protection circuits against overcurrent, over-voltage and over-temperature. A LED gives a visual indication of the output status at all times. Dimming range: between 10% and 95% Flexible soft start function (hot and cold - soft start) Zero-crossing detection Protection function for over-current, over-voltage and over-temperature LED status indication for protection function Ambient temperature range 0C to 70C Package: Die-in-waffle-pack or SOP14 example application schematic A typical application schematic for a 350W load. www..com electrical characteristics DC characteristics contain the spread of values guarantee within the specified supply voltage and temperature range and the technology process parameter range unless otherwise specified. Ta = 25C for typical values # 1 2 3 Symbol IDDL IDDH IDDL_Error Parameter Current Consumption Current Consumption Current Consumption Error-Mode Conditions VOUT = Low VDD =12V VINZ = 1V VOUT = High VDD =12V VINZ = 1V VOUT = Low VDD =12V,VINz=1V VOT 1V VDD =12V VDD =12V VDD =12V VDD =12V -IOUT = 6mA VDD =12V 9 10 11 12 VOUTH VOUTL VOUTL VOSL Output Voltage High OUT Output Voltage Low OUT Output Voltage Low OUT -IOUT = 10A VDD =12V IOUT = 6mA VDD =12V IOUT = 10A VDD =12V Output Voltage Low Error-Mode OS IOS= 2mA VDD =12V 0.2 0.55 V 0.1 0.55 V 0.2 0.55 V 7.5 10.6 V Min Typ 0.8 0.5 1.4 Max 1.0 0.8 1.9 Unit mA mA mA 4 5 6 7 8 VTRES VPON VTH OC1, 2 VTH OV/OT VOUTH Threshold Voltage Input TRES Threshold Voltage Power on Threshold Voltage OC1, 2 Threshold Voltage OV/OT Output Voltage High OUT 6.5 8.0 0.55 0.55 7.5 7.5 9.1 0.75 0.75 9.2 8.5 9.9 0.85 0.85 - V V V V V AC characteristics contain the spread of values guarantee within the specified supply voltage and temperature range and the technology process parameter range unless otherwise specified. Ta = 25C for typical values # 1 2 3 Symbol tr OUT Tf OUT tSoft c Parameter Turn-on rise time Turn-off fall time 1) Conditions CL = 1.5nF VDD =12V Min - Typ 200 200 1.9 Max 500 500 Unit ns ns s 1) CL = 1.5nF VDD =12V CCS = 4.7F, max. Full Power PF= 0.95 VDD =12V Soft Start Time cold 1) 1) Parameters are protected by correlation measure |
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