Datasheet LT3746 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | 32-Channel 20mA LED Driver with Buck Controller |
| Pages / Page | 28 / 8 — Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. … |
| File Format / Size | PDF / 609 Kb |
| Document Language | English |
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Buck Efficiency. Shutdown IVIN vs VIN
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LT3746
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Buck Efficiency Shutdown IVIN vs VIN Quiescent IVIN vs VIN
100 5 0.43 95 24VIN, 12VOUT at 1MHz 4 0.42 90 T = 125°C 85 T = 125°C 12VIN, 4VOUT at 500kHz 3 0.41 80 (µA) (mA) I VIN T = 25°C 2 I VIN 0.40 EFFICIENCY (%) 75 48VIN, 4VOUT at 200kHz 70 T = –40°C 1 0.39 65 T = 25°C T = –40°C 60 0 0.38 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 10 20 30 40 50 60 0 10 20 30 40 50 60 LOAD CURRENT (A) VIN (V) VIN (V) 3746 G10 3746 G11 3746 G12
IVCC vs VCC – Shutdown Mode IVCC vs VCC – Channel Off, Data Off IVCC vs VCC – Channel On, Data Off
10 3.45 10.35 T = 125°C 3.40 10.30 8 T = 125°C T = 25°C 3.35 10.25 6 3.30 10.20 T = 125°C (µA) T = 25°C (mA) 3.25 (mA) 10.15 I VCC 4 I VCC I VCC 3.20 10.10 T = –40°C 3.15 10.05 2 T = –40°C T = 25°C T = –40°C 3.10 10.00 0 3.05 9.95 3.0 3.5 4.0 4.5 5.0 5.5 3.0 3.5 4.0 4.5 5.0 5.5 3.0 3.5 4.0 4.5 5.0 5.5 VCC (V) VCC (V) VCC (V) 3746 G13 3746 G14 3746 G15
VCC UVLO Threshold vs EN/UVLO UVLO Threshold vs IVCC vs VCC – Channel On, Data On Temperature Temperature
27 2.90 1.32 UVLO+ UVLO+ 25 2.85 1.30 T = 25°C 23 2.80 1.28 T = 125°C (V) (V) (mA) 21 2.75 1.26 V CC I VCC UVLO– V EN/UVLO 19 T = –40°C 2.70 1.24 UVLO– 17 2.65 1.22 15 2.60 1.20 3.0 3.5 4.0 4.5 5.0 5.5 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 VCC (V) JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) 3746 G16 3746 G17 3746 G18 3746fa 8 For more information www.linear.com/3746 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Pin Functions Block Diagram Applications Information Typical Application Related Parts
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Buck Efficiency Shutdown IVIN vs VIN Quiescent IVIN vs VIN
100 5 0.43 95 24VIN, 12VOUT at 1MHz 4 0.42 90 T = 125°C 85 T = 125°C 12VIN, 4VOUT at 500kHz 3 0.41 80 (µA) (mA) I VIN T = 25°C 2 I VIN 0.40 EFFICIENCY (%) 75 48VIN, 4VOUT at 200kHz 70 T = –40°C 1 0.39 65 T = 25°C T = –40°C 60 0 0.38 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 10 20 30 40 50 60 0 10 20 30 40 50 60 LOAD CURRENT (A) VIN (V) VIN (V) 3746 G10 3746 G11 3746 G12
IVCC vs VCC – Shutdown Mode IVCC vs VCC – Channel Off, Data Off IVCC vs VCC – Channel On, Data Off
10 3.45 10.35 T = 125°C 3.40 10.30 8 T = 125°C T = 25°C 3.35 10.25 6 3.30 10.20 T = 125°C (µA) T = 25°C (mA) 3.25 (mA) 10.15 I VCC 4 I VCC I VCC 3.20 10.10 T = –40°C 3.15 10.05 2 T = –40°C T = 25°C T = –40°C 3.10 10.00 0 3.05 9.95 3.0 3.5 4.0 4.5 5.0 5.5 3.0 3.5 4.0 4.5 5.0 5.5 3.0 3.5 4.0 4.5 5.0 5.5 VCC (V) VCC (V) VCC (V) 3746 G13 3746 G14 3746 G15
VCC UVLO Threshold vs EN/UVLO UVLO Threshold vs IVCC vs VCC – Channel On, Data On Temperature Temperature
27 2.90 1.32 UVLO+ UVLO+ 25 2.85 1.30 T = 25°C 23 2.80 1.28 T = 125°C (V) (V) (mA) 21 2.75 1.26 V CC I VCC UVLO– V EN/UVLO 19 T = –40°C 2.70 1.24 UVLO– 17 2.65 1.22 15 2.60 1.20 3.0 3.5 4.0 4.5 5.0 5.5 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 VCC (V) JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) 3746 G16 3746 G17 3746 G18 3746fa 8 For more information www.linear.com/3746 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Pin Functions Block Diagram Applications Information Typical Application Related Parts
