Datasheet LT3746 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | 32-Channel 20mA LED Driver with Buck Controller |
| Pages / Page | 28 / 6 — elecTrical characTerisTics Note 1:. Note 5:. Note 2:. Note 6:. Note 3:. … |
| File Format / Size | PDF / 609 Kb |
| Document Language | English |
elecTrical characTerisTics Note 1:. Note 5:. Note 2:. Note 6:. Note 3:. Note 7:. Note 8:. Note 9:. Note 4:. Note 10:
Model Line for this Datasheet
Text Version of Document
LT3746
elecTrical characTerisTics Note 1:
Stresses beyond those listed under Absolute Maximum Ratings SCKO/SDO/LDO loading capacitance, and PWMCK clock frequency; its may cause permanent damage to the device. Exposure to any Absolute test condition is VCC = 3.3V, fSCKI = 30MHz, CSCKO = CSDO = CLDO = 27pF, Maximum Rating condition for extended periods may affect device fPWMCK = 409.6KHz. reliability and lifetime.
Note 5:
The SYNC frequency must be higher than the RT programmed
Note 2:
The LT3746E is guaranteed to meet performance specifications oscil ator frequency, and is suggested to be around 20% higher. from 0°C to 125°C junction temperature. Specifications over the –40°C Any SYNC frequency higher than the suggested value may introduce to 125°C operating junction temperature range are assured by design, sub-harmonic oscil ation in the converter due to insufficient slope characterization and correlation with statistical process controls. The compensation. See Application Information section. LT3746I is guaranteed over the full –40°C to 125°C operating junction
Note 6:
The Current Mismatch between Channels is calculated as temperature range. Equation 1 in Table 1.
Note 3:
This IC includes thermal shutdown protection that is intended
Note 7:
The Current Mismatch between Devices is calculated as to protect the device during momentary overload conditions. Junction Equations 2 and 3 in Table 1. temperature will exceed 125°C when thermal shutdown protection is
Note 8:
The LED Current Line Regulation is calculated as Equation 4 in active. Continuous operation above the specified maximum operating Table 1. junction temperature may impair device reliability.
Note 9:
The LED Current Load Regulation is calculated as Equation 5 in
Note 4:
The VCC supply current with LED channel on highly depends on Table 1. the LED current setting and LEDxx pin voltage; its test condition is R
Note 10:
The specifications of single-ended input SI apply to SCKI, SDI, ISET = 60.4k, REGDC = 0x3F, REGGS = 0xFFF, VISP = VISN = 5V, V and LDI pins; the specifications of single-ended output SO apply to LEDxx = 0.5V. The VCC supply current with serial data interface on highly depends on V SCKO, SDO, and LDO pins. CC supply voltage, serial data interface clock frequency, 3746fa 6 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
elecTrical characTerisTics Note 1:
Stresses beyond those listed under Absolute Maximum Ratings SCKO/SDO/LDO loading capacitance, and PWMCK clock frequency; its may cause permanent damage to the device. Exposure to any Absolute test condition is VCC = 3.3V, fSCKI = 30MHz, CSCKO = CSDO = CLDO = 27pF, Maximum Rating condition for extended periods may affect device fPWMCK = 409.6KHz. reliability and lifetime.
Note 5:
The SYNC frequency must be higher than the RT programmed
Note 2:
The LT3746E is guaranteed to meet performance specifications oscil ator frequency, and is suggested to be around 20% higher. from 0°C to 125°C junction temperature. Specifications over the –40°C Any SYNC frequency higher than the suggested value may introduce to 125°C operating junction temperature range are assured by design, sub-harmonic oscil ation in the converter due to insufficient slope characterization and correlation with statistical process controls. The compensation. See Application Information section. LT3746I is guaranteed over the full –40°C to 125°C operating junction
Note 6:
The Current Mismatch between Channels is calculated as temperature range. Equation 1 in Table 1.
Note 3:
This IC includes thermal shutdown protection that is intended
Note 7:
The Current Mismatch between Devices is calculated as to protect the device during momentary overload conditions. Junction Equations 2 and 3 in Table 1. temperature will exceed 125°C when thermal shutdown protection is
Note 8:
The LED Current Line Regulation is calculated as Equation 4 in active. Continuous operation above the specified maximum operating Table 1. junction temperature may impair device reliability.
Note 9:
The LED Current Load Regulation is calculated as Equation 5 in
Note 4:
The VCC supply current with LED channel on highly depends on Table 1. the LED current setting and LEDxx pin voltage; its test condition is R
Note 10:
The specifications of single-ended input SI apply to SCKI, SDI, ISET = 60.4k, REGDC = 0x3F, REGGS = 0xFFF, VISP = VISN = 5V, V and LDI pins; the specifications of single-ended output SO apply to LEDxx = 0.5V. The VCC supply current with serial data interface on highly depends on V SCKO, SDO, and LDO pins. CC supply voltage, serial data interface clock frequency, 3746fa 6 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
