Datasheet LT3496 (Analog Devices) - 3

LT3496 electrical characteristics
The
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denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, VSHDN = 5V, CAP1, CAP2, CAP3 = 5V, PWM1, PWM2, PWM3 = 5V, fADJ = 0.5V, CTRL1, CTRL2, CTRL3 = 1.5V, OVP1, OVP2, OVP3 = 0V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operation Voltage (Note 4) 3 30 V VIN Undervoltage Lockout 2.1 2.4 V Full-Scale LED Current Sense Voltage CAP1, CAP2, CAP3 = 24V 98 100 103 mV (VCAP1-LED1, VCAP2-LED2, VCAP3-LED3) l 97 104 mV One-Tenth Scale LED Current Sense Voltage CTRL1, CTRL2, CTRL3 = 100mV, CAP1, CAP2, CAP3 = 24V (VCAP1-LED1, VCAP2-LED2, VCAP3-LED3) H-Grade l 7.5 10 13.5 mV E-Grade, I-Grade l 7.5 10 12.5 mV CAP1, CAP2, CAP3 Operating Voltage 0V ≤ VCAP1-LED1 ≤ 104mV 2.5 45 V 0V ≤ VCAP2-LED2 ≤ 104mV 0V ≤ VCAP3-LED3 ≤ 104mV VREF Output Voltage IREF = 200µA, Current Out of Pin l 1.96 2 2.04 V VREF Line Regulation 3V ≤ VIN ≤ 40V, IREF = 10µA 0.03 %/V Quiescent Current in Shutdown SHDN = 0V 0.1 10 µA Quiescent Current Idle PWM1, PWM2, PWM3 = 0V 6 7.5 mA Quiescent Current Active (Not Switching) 11 14 mA Switching Frequency fADJ = 1.5V 1900 2100 2300 kHz fADJ = 0.5V 1300 kHz fADJ = 0.1V 330 kHz Maximum Duty Cycle fADJ = 1.5V (2.1MHz) l 70 78 % fADJ = 0.5V (1.3MHz) 87 % fADJ = 0.1V (330kHz) 97 % CTRL1, CTRL2, CTRL3 Input Bias Current Current Out of Pin, CTRL1, CTRL2, CTRL3 = 0.1V 20 100 nA fADJ Input Bias Current Current Out of Pin, fADJ = 0.1V 20 100 nA OVP1, OVP2, OVP3 Input Bias Current Current Out of Pin, OVP1, OVP2, OVP3 = 0.1V 10 100 nA OVP1, OVP2, OVP3 Threshold 0.95 1 1.05 V VC1, VC2, VC3 Idle Input Bias Current PWM1, PWM2, PWM3 = 0V –20 0 20 nA VC1, VC2, VC3 Output Impedance CAP1, CAP2, CAP3 = 24V 10 MΩ EAMP gm (ΔIVC/ΔVCAP-LED) CAP1, CAP2, CAP3 = 24V 200 µS SW1, SW2, SW3 Current Limit (Note 3) 750 1000 1250 mA SW1, SW2, SW3 VCESAT ISW = 500mA (Note 3) 260 mV SW1, SW2, SW3 Leakage Current SHDN = 0V, SW = 5V 2 µA CAP1, CAP2, CAP3 Input Bias Current 180 250 µA CAP1, CAP2, CAP3, LED1, LED2, LED3 Idle Input PWM1, PWM2, PWM3 = 0V 1 µA Bias Current CAP1, CAP2, CAP3, LED1, LED2, LED3 Input Bias SHDN = 0V 1 µA Current in Shutdown 3496ff Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts