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Datasheet LT3956 (Analog Devices) - 4

ПроизводительAnalog Devices
Описание80VIN, 80VOUT Constant-Current, Constant-Voltage Converter
Страниц / Страница20 / 4 — The. denotes the specifications which apply over the full operating temp-
Формат / Размер файлаPDF / 1.5 Мб
Язык документаанглийский

The. denotes the specifications which apply over the full operating temp-

The denotes the specifications which apply over the full operating temp-

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LT3956 e

lecTrical characTerisTics
The
l
denotes the specifications which apply over the full operating temp- erature range, otherwise specifications are at TA = 25°C. VIN = 24V, EN/UVLO = 24V, CTRL = 2V, PWM = 5V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS Logic Inputs/Outputs
PWM Threshold Voltage l 0.85 1.35 1.8 V PWM Pin Resistance to GND 45 60 kΩ EN/UVLO Threshold Voltage Falling l 1.185 1.220 1.245 V EN/UVLO Rising Hysteresis 20 mV EN/UVLO Input Low Voltage IVIN Drops Below 1µA 0.4 V EN/UVLO Pin Bias Current Low EN/UVLO = 1.15V 1.7 2.1 2.5 µA EN/UVLO Pin Bias Current High EN/UVLO = 1.30V 10 100 nA VMODE Output Low (VOL) IVMODE = 1mA 200 mV VMODE Pin Leakage FB = 0V, VMODE = 12V 0.1 5 µA
PWMOUT Driver
tr PWMOUT Driver Output Rise Time CL = 560pF 35 ns tf PWMOUT Driver Output Fall Time CL = 560pF 35 ns PWMOUT Output Low (VOL) 0.05 V PWMOUT Output High (VOH) INTVCC – V 0.05
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings to 125°C operating junction temperature range are assured by design, may cause permanent damage to the device. Exposure to any Absolute characterization and correlation with statistical process controls. The Maximum Rating condition for extended periods may affect device LT3956I is guaranteed to meet performance specifications over the –40°C reliability and lifetime. to 125°C operating junction temperature range.
Note 2:
The LT3956E is guaranteed to meet performance specifications
Note 3:
For VIN below 6V, the EN/UVLO pin must not exceed VIN for proper from 0°C to 125°C junction temperature. Specifications over the –40°C operation. Typical perForMance characTerisTics
TA = 25°C, unless otherwise noted. V(ISP–ISN) Threshold vs VISP V(ISP–ISN) Full-Scale Threshold V(ISP–ISN) Threshold vs VCTRL with Reduced CTRL Voltage vs Temperature
300 103 256 CTRL = 0.5V CTRL = 2V 250 102 254 200 252 101 150 250 100 THRESHOLD (mV) 100 THRESHOLD (mV) THRESHOLD (mV) 248 –ISN) –ISN) 99 –ISN) P 50 P P 246 V (IS V (IS V (IS 0 98 244 –50 97 242 0 0.5 1 1.5 2 0 20 40 60 80 –50 –25 0 25 50 75 100 125 CTRL VOLTAGE (V) ISP VOLTAGE (V) TEMPERATURE (°C) 3956 G01 3956 G02 3956 G03 3956f Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration order information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Typical Application Related Parts
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