Product Summary
The LT1509ISW is a complete solution for universal off-line switching power supplies utilizing active power factor correction. The PFC section is identical to the LT1248 PFC controller except the EN/SYNC pin is removed because PFC and PWM are synchronized internally. Application is universal power factor corrected power supplies and preregulators.
Parametrics
LT1509ISW absolute maximum ratings: (1)Supply voltage: 27V; (2)GTDR current continuous: 0.5A; (3)GTDR output energy: 5mJ; (4)IAC, RSET, PKLIM Input Current : 20mA; (5)VSENSE, OVP input voltage: VMAX; (6)RAMP, VC input voltage: 8V; (7)ISENSE, MOUT input current: ±5mA; (8)Operating junction temperature range commercial: 0°C to 100°C; (9)Operating junction temperature range industrial: –40°C to 125°C; (10)Thermal Resistance (Junction-to-Ambient)N Package: 100°C/W; (11)SW package: 120°C/W。
Features
LT1509ISW features: (1)PFC and PWM single chip solution; (2)Synchronized operatioup to 300kHz; (3)99% power factor over 20:1 load current range; (4)Current mode PWM; (5)Instantaneous overvoltage protection; (6)Dedicated overvoltage protectio(OVP pin); (7)Minimal line current dead zone; (8)Typical 250mA start-up supply current; (9)Line switching noise filter; (10)Low quiescent current: 13mA; (11)Fast 2A peak current gate drivers; (12)Separate soft start controls.
Diagrams
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![]() LT1509ISW#TR |
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![]() IC PFC CTRLR AVERAGE CURR 20SOIC |
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![]() LT1509ISW#TRPBF |
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![]() IC PFC CTRLR AVERAGE CURR 20SOIC |
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