Datasheet LT1725 (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | General Purpose Isolated Flyback Controller |
| Pages / Page | 28 / 2 — ABSOLUTE AXI U RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). Order … |
| File Format / Size | PDF / 265 Kb |
| Document Language | English |
ABSOLUTE AXI U RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). Order Options. ELECTRICAL CHARACTERISTICS The
Model Line for this Datasheet
Text Version of Document
LT1725
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
VCC Supply Voltage ... 22V TOP VIEW UVLO Pin Voltage .. VCC PGND 1 16 GATE ISENSE Pin Voltage .. 2V I 2 15 SENSE VCC FB Pin Current ... ±2mA SFST 3 14 tON Operating Junction R 4 13 OCMP ENDLY Temperature Range R 5 12 CMPC MINENAB LT1725C .. 0°C to 100°C OSCAP 6 11 SGND LT1725I ... –40°C TO 125°C V 7 10 C UVLO FB 8 9 3V Storage Temperature Range .. – 65°C to 150°C OUT Lead Temperature (Soldering, 10 sec).. 300°C GN PACKAGE S PACKAGE 16-LEAD PLASTIC SSOP 16-LEAD PLASTIC SO TJMAX = 125°C, θJA = 110°C/W (GN) TJMAX = 125°C, θJA = 100°C/W (SO) ORDER PART NUMBER GN PART MARKING LT1725CGN 1725 LT1725IGN 1725I LT1725CS LT1725IS
Order Options
Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VCC = 14V, GATE open, VC = 1.4V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Power Supply
VCC VCC Turn-On Voltage ● 14.0 15.1 16.0 V VCC Turn-Off Voltage ● 8 9.7 11 V VCC Hysteresis (Note 3) (VTURN-ON – VTURN-OFF) ● 4.0 5.4 6.5 V ICC Supply Current VC = Open ● 6 10 15 mA Start-Up Current ● 120 280 µA
Feedback Amplifier
VFB Feedback Voltage 1.230 1.245 1.260 V ● 1.220 1.270 V IFB Feedback Pin Input Current 500 nA gm Feedback Amplifier Transconductance ∆lC = ±10µA ● 400 1000 1800 µmho ISRC, ISNK Feedback Amplifier Source or Sink Current ● 30 50 80 µA VCL Feedback Amplifier Clamp Voltage 2.5 V Reference Voltage/Current Line Regulation 12V ≤ VIN ≤ 18V ● 0.01 0.05 %/V Voltage Gain VC = 1V to 2V 2000 V/V Soft-Start Charging Current VSFST = 0V 25 40 50 µA Soft-Start Discharge Current VSFST = 1.5V, VUVLO = 0V 0.8 1.5 mA 1725fa 2
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
VCC Supply Voltage ... 22V TOP VIEW UVLO Pin Voltage .. VCC PGND 1 16 GATE ISENSE Pin Voltage .. 2V I 2 15 SENSE VCC FB Pin Current ... ±2mA SFST 3 14 tON Operating Junction R 4 13 OCMP ENDLY Temperature Range R 5 12 CMPC MINENAB LT1725C .. 0°C to 100°C OSCAP 6 11 SGND LT1725I ... –40°C TO 125°C V 7 10 C UVLO FB 8 9 3V Storage Temperature Range .. – 65°C to 150°C OUT Lead Temperature (Soldering, 10 sec).. 300°C GN PACKAGE S PACKAGE 16-LEAD PLASTIC SSOP 16-LEAD PLASTIC SO TJMAX = 125°C, θJA = 110°C/W (GN) TJMAX = 125°C, θJA = 100°C/W (SO) ORDER PART NUMBER GN PART MARKING LT1725CGN 1725 LT1725IGN 1725I LT1725CS LT1725IS
Order Options
Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VCC = 14V, GATE open, VC = 1.4V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Power Supply
VCC VCC Turn-On Voltage ● 14.0 15.1 16.0 V VCC Turn-Off Voltage ● 8 9.7 11 V VCC Hysteresis (Note 3) (VTURN-ON – VTURN-OFF) ● 4.0 5.4 6.5 V ICC Supply Current VC = Open ● 6 10 15 mA Start-Up Current ● 120 280 µA
Feedback Amplifier
VFB Feedback Voltage 1.230 1.245 1.260 V ● 1.220 1.270 V IFB Feedback Pin Input Current 500 nA gm Feedback Amplifier Transconductance ∆lC = ±10µA ● 400 1000 1800 µmho ISRC, ISNK Feedback Amplifier Source or Sink Current ● 30 50 80 µA VCL Feedback Amplifier Clamp Voltage 2.5 V Reference Voltage/Current Line Regulation 12V ≤ VIN ≤ 18V ● 0.01 0.05 %/V Voltage Gain VC = 1V to 2V 2000 V/V Soft-Start Charging Current VSFST = 0V 25 40 50 µA Soft-Start Discharge Current VSFST = 1.5V, VUVLO = 0V 0.8 1.5 mA 1725fa 2
