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LD7890GS Folha de dados(PDF) 8 Page - Leadtrend Technology |
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LD7890GS Folha de dados(HTML) 8 Page - Leadtrend Technology |
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8 / 16 page ![]() LD7890 8 Leadtrend Technology Corporation www.leadtrend.com.tw LD7890-DS-01 November, 2013 PARAMETER CONDITIONS MIN. TYP. MAX. UNITS PWM Dimming and EN EN Logic Enable 1.5 V Disable 0.7 V PWM Pull Down Resistance 950 K EN Pull Down Resistance 950 K PWM dimming frequency 100 1k Hz LOSC Frequency CLOSC=2.2nF 0.9 KHz LOSC Ramp Amplitude * Peak 1.2 V Valley 200 mV Protection LED Over Voltage Threshold OVP 2.4 2.5 2.6 V LED Over Voltage Hysteresis OVP Hysteresis 50 80 mV Short Protection Current ISP 7.5 10 12.5 A Short Protection Threshold Voltage VLEDSP 2.8 3 3.2 V SENSEN Under Voltage Protection Threshold LED Open Protection 0.15 0.2 0.25 V Boost- Short circuit Protection OVP pin voltage 0.15 0.2 0.25 V Thermal Shutdown threshold 150 C Thermal Shutdown hysteresis 30 C STATUS Output Sink Resistance 100 * Guaranteed by design |
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