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LT3597

3597f

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 24V, BOOST = 29V, BIAS = 5V, EN/UVLO = 5V, PWM1-3 = 3.3V,

CTRL1-3 = CTRLM = TSET = 2.0V, VOUT1-3 = 24V, SYNC = 0V, unless otherwise specified. (Note 2)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

LED String Current Matching

RISET1-3 = 20k

±0.35

±1.5

±2

LED Pin Voltage

Adaptive VOUT Loop Enabled

1.1

LED1-3 Open Detection Threshold

0.28

LED1-3 Short Protection Threshold (from GND)

PWM1-3 = 3.3V

LED1-3 Short Protection Threshold (from VOUT1-3) VOUT1-3 = 6V

1.25

LED1-3 Pin Leakage Current

VLED1-3 = 42V

100

PWM1-3 Input Low Voltage

0.4

PWM1-3 Input High Voltage

1.6

PWM1-3 Pin Bias Current

200

CTRL1-3 Voltage for Full LED Current

1.2

CTRL1-3 Pin Bias Current

CTRL1-3 = 6V

200

CTRLM Voltage for Full LED Current

1.2

CTRLM Pin Bias Current

CTRLM = 3V

200

FAULT Output Voltage Low

IFAULT = 200µA

0.11

FAULT Pin Input leakage Current

FAULT = 25V

200

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LT3597E is guaranteed to meet performance specifications

from 0°C to 125°C junction temperature. Specifications over the –40°C

to 125°C operating junction temperature range are assured by design,

characterization and correlation with statistical process controls. The

LT3597I specifications are guaranteed over the full –40°C to 125°C

operating junction temperature range.

Note 3: For Maximum Operating Ambient Temperature, see Thermal

Considerations in the Applications Information section.

Note 4: Guaranteed by design.

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