Datasheet LT3745 (Analog Devices) - 6
| Hersteller | Analog Devices |
| Beschreibung | 16-Channel 50mA LED Driver with Buck Controller |
| Seiten / Seite | 28 / 6 — elecTrical characTerisTics Note 1:. Note 5:. Note 2:. Note 6:. Note 3:. … |
| Dateiformat / Größe | PDF / 394 Kb |
| Dokumentensprache | Englisch |
elecTrical characTerisTics Note 1:. Note 5:. Note 2:. Note 6:. Note 3:. Note 7:. Note 8:. Note 9:. Note 4:. Note 10:
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LT3745
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 = 15pF, 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 LT3745E is guaranteed to meet performance specifications oscillator frequency, and is suggested to be around 20% higher. Any SYNC from 0°C to 125°C junction temperature. Specifications over the –40°C frequency higher than the suggested value may introduce sub-harmonic to 125°C operating junction temperature range are assured by design, oscillation in the converter due to insufficient slope compensation. See characterization and correlation with statistical process controls. The Application Information section. LT3745I is guaranteed over the full –40°C to 125°C operating junction
Note 6:
The Current Mismatch between Channels is calculated as Equation temperature range. 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 Equations to protect the device during momentary overload conditions. Junction 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 SCKO, LEDxx = 1V. The VCC supply current with serial data interface on highly depends on V SDO, and LDO pins. CC supply voltage, serial data interface clock frequency, 3745f 6 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Timing Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description 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 = 15pF, 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 LT3745E is guaranteed to meet performance specifications oscillator frequency, and is suggested to be around 20% higher. Any SYNC from 0°C to 125°C junction temperature. Specifications over the –40°C frequency higher than the suggested value may introduce sub-harmonic to 125°C operating junction temperature range are assured by design, oscillation in the converter due to insufficient slope compensation. See characterization and correlation with statistical process controls. The Application Information section. LT3745I is guaranteed over the full –40°C to 125°C operating junction
Note 6:
The Current Mismatch between Channels is calculated as Equation temperature range. 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 Equations to protect the device during momentary overload conditions. Junction 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 SCKO, LEDxx = 1V. The VCC supply current with serial data interface on highly depends on V SDO, and LDO pins. CC supply voltage, serial data interface clock frequency, 3745f 6 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Timing Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Typical Application Related Parts