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SGM3720 Datasheet(PDF) 4 Page - SG Micro Corp |
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SGM3720 Datasheet(HTML) 4 Page - SG Micro Corp |
4 / 12 page PWM Dimming, 38V Step-Up LED Driver 4 SGM3720 SG Micro Corp www.sg-micro.com ELECTRICAL CHARACTERISTICS (1) (VIN = 3.6V, L = 22μH, CIN = 10μF, COUT = 0.47μF, Full = -40 ℃ to +85℃, typical values are at TA = +25℃, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS TEMP MIN TYP MAX UNITS IC SUPPLY Input Voltage Range VIN Full 2.7 5.5 V Input Under-Voltage Lockout UVLO Rising edge +25 ℃ 2.5 2.6 V UVLO Hysteresis VHYS +25 ℃ 0.15 V Quiescent Current (Non Switching) VFB = 0.4V +25 ℃ 0.20 0.35 mA Operating Current (Switching) IQ VFB = 0V +25 ℃ 0.5 0.9 mA VIN Pin Shutdown Current ISHDN VEN = 0V +25 ℃ 0.1 1 μA STEP-UP CONVERTER Voltage Feedback Regulation Voltage VREF Full 289 300 311 mV VREF Filter 3dB Frequency fREF(3dB) +25 ℃ 500 Hz Voltage Feedback Input Bias Current IFB Full 0.001 0.3 μA NMOS On-Resistance RDS(ON) +25 ℃ 0.36 0.55 Ω SW Pin Leakage Current ISW +25 ℃ 0.01 1 μA Peak NMOS Current Limit ILIM +25 ℃ 1.2 1.6 2.0 A Oscillator Frequency fS Full 475 600 725 kHz Maximum Duty Cycle DMAX +25 ℃ 91 95 % Over-Voltage Threshold VOVP Measured at VOUT pin Full 35.5 38 40.5 V Start-Up Time tS +25 ℃ 800 μs CONTROL Logic Low Threshold VIL Full 0.35 V Logic High Threshold VIH Full 1.5 V Minimum Shutdown Pulse Width Timing tOFF +25 ℃ 3 ms Junction Thermal Shutdown Threshold 150 ℃ Junction Thermal Shutdown Hysteresis 15 ℃ NOTE: 1. The SGM3720 is guaranteed to meet performance specifications over the -40 ℃ to +85℃ operating temperature range by design, characterization and correlation with statistical process controls. |
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