Datasheet LT1952, LT1952-1 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | Single Switch Synchronous Forward Controller |
| Pages / Page | 28 / 8 — TYPICAL PERFORMANCE CHARACTERISTICS. tDELAY: SOUT Rise to OUT Rise. BLANK … |
| File Format / Size | PDF / 371 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. tDELAY: SOUT Rise to OUT Rise. BLANK Duration vs RBLANK. vs Temperature. vs RDELAY
Model Line for this Datasheet
Text Version of Document
LT1952/LT1952-1
TYPICAL PERFORMANCE CHARACTERISTICS tDELAY: SOUT Rise to OUT Rise tDELAY: SOUT Rise to OUT Rise BLANK Duration vs RBLANK vs Temperature vs RDELAY
1000 200 240 TA = 25°C TA = 25°C 800 150 RDELAY = 120k 160 600 (ns) (ns) 100 BLANK (ns) 400 t DELAY t DELAY 80 50 200 RDELAY = 40k 0 0 0 0 20 40 60 80 100 120 140 160 –50 –25 0 25 50 75 100 125 0 40 80 120 160 200 240 RBLANK (k) TEMPERATURE (°C) RDELAY (k) 1952 G26 1952 G19 1952 G27
OUT Rise/Fall Time OUT: Max Duty Cycle CLAMP vs OUT Load Capacitance OUT: Max Duty Cycle vs fOSC vs SD_VSEC
125 100 90 TA = 25°C 80 100 70 tr 90 60 75 50 tf 40 50 80 30 OUT DUTY CYCLE (%) OUT RISE/FALL TIME (ns) 25 20 TA = 25°C TA = 25°C SS_MAXDC = 1.84V SS_MAXDC = 2.5V OUT MAX DUTY CYCLE CLAMP (%) 10 fOSC = 200kHz SD_VSEC = 1.4V RDELAY = 10k 0 70 0 0 1000 2000 3000 4000 5000 100 200 300 400 500 1.32 1.65 1.98 2.31 2.64 OUT LOAD CAPACITANCE (pF) fOSC (kHz) SD_VSEC (V) 1952 G20 1952 G21 1952 G22
OUT: Max Duty Cycle CLAMP SS_MAXDC Setting SS_MAXDC Reset and Active vs SS_MAXDC vs fOSC (for OUT DC = 72%) Thresholds vs Temperature
90 2.32 1.2 TA = 25°C TA = 25°C f SD_V 80 OSC = 200kHz SEC = 1.32V RDELAY = 10k 2.20 RDELAY = 10k 1.0 SD_V ACTIVE THRESHOLD SEC = 1.32V 70 2.08 0.8 60 1.96 0.6 50 SD_VSEC = 1.98V SS_MAXDC (V) 1.84 SS_MAXDC (mV) 0.4 40 RESET THRESHOLD SD_V OUT MAX DUTY CYCLE CLAMP (%) 30 SEC = 2.64V 1.72 0.2 20 1.60 0 1.60 1.84 2.08 100 200 300 400 500 –50 –25 0 25 50 75 100 125 SS_MAXDC (V) fOSC (kHz) TEMPERATURE (°C) 1952 G23 1952 G24 1952 G25 19521fe 8 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Timing Diagram Block Diagram Operation Applications Information Typical Applications Revision History Package Description Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS tDELAY: SOUT Rise to OUT Rise tDELAY: SOUT Rise to OUT Rise BLANK Duration vs RBLANK vs Temperature vs RDELAY
1000 200 240 TA = 25°C TA = 25°C 800 150 RDELAY = 120k 160 600 (ns) (ns) 100 BLANK (ns) 400 t DELAY t DELAY 80 50 200 RDELAY = 40k 0 0 0 0 20 40 60 80 100 120 140 160 –50 –25 0 25 50 75 100 125 0 40 80 120 160 200 240 RBLANK (k) TEMPERATURE (°C) RDELAY (k) 1952 G26 1952 G19 1952 G27
OUT Rise/Fall Time OUT: Max Duty Cycle CLAMP vs OUT Load Capacitance OUT: Max Duty Cycle vs fOSC vs SD_VSEC
125 100 90 TA = 25°C 80 100 70 tr 90 60 75 50 tf 40 50 80 30 OUT DUTY CYCLE (%) OUT RISE/FALL TIME (ns) 25 20 TA = 25°C TA = 25°C SS_MAXDC = 1.84V SS_MAXDC = 2.5V OUT MAX DUTY CYCLE CLAMP (%) 10 fOSC = 200kHz SD_VSEC = 1.4V RDELAY = 10k 0 70 0 0 1000 2000 3000 4000 5000 100 200 300 400 500 1.32 1.65 1.98 2.31 2.64 OUT LOAD CAPACITANCE (pF) fOSC (kHz) SD_VSEC (V) 1952 G20 1952 G21 1952 G22
OUT: Max Duty Cycle CLAMP SS_MAXDC Setting SS_MAXDC Reset and Active vs SS_MAXDC vs fOSC (for OUT DC = 72%) Thresholds vs Temperature
90 2.32 1.2 TA = 25°C TA = 25°C f SD_V 80 OSC = 200kHz SEC = 1.32V RDELAY = 10k 2.20 RDELAY = 10k 1.0 SD_V ACTIVE THRESHOLD SEC = 1.32V 70 2.08 0.8 60 1.96 0.6 50 SD_VSEC = 1.98V SS_MAXDC (V) 1.84 SS_MAXDC (mV) 0.4 40 RESET THRESHOLD SD_V OUT MAX DUTY CYCLE CLAMP (%) 30 SEC = 2.64V 1.72 0.2 20 1.60 0 1.60 1.84 2.08 100 200 300 400 500 –50 –25 0 25 50 75 100 125 SS_MAXDC (V) fOSC (kHz) TEMPERATURE (°C) 1952 G23 1952 G24 1952 G25 19521fe 8 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Timing Diagram Block Diagram Operation Applications Information Typical Applications Revision History Package Description Related Parts
