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XRP6840AILBTR-F Datasheet(PDF) 3 Page - Exar Corporation |
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XRP6840AILBTR-F Datasheet(HTML) 3 Page - Exar Corporation |
3 / 17 page X XR RP P6 68 84 40 0 4 4..3 3A A S Su up pe errcca ap pa acciitto orr F Flla as sh h L LE ED D D Drriiv ve err w wiitth h II22C C © 2009 Exar Corporation 3/17 Rev. 1.0.0 Parameter Min. Typ. Max. Units Conditions Channel to Channel Current Matching -3 3 % • 0mA < ILED < 1.6A Per Channel, Note 3 Switching Frequency 2.0 2.4 2.8 MHz • Equivalent Resistance, 1X Mode 0.5 Ω • VIN = 3.7V, IOUT = 200mA Equivalent Resistance, 1.5X Mode 4 7 Ω • VIN = 3.2V, VOUT < VOUT_LIMIT, IOUT = 200mA, Equivalent resistance = [(VIN x 1.5) - VOUT] / IOUT LEDx Pin Dropout Voltage 0.36 V • Flash mode, VIN = 3.4V, ILED = 1A, Measure LED current at 95% ILEDX-NOMINAL at VLEDX=0.8V LEDx Pin Dropout Voltage 0.1 V • Torch mode, VIN = 3.4V, ILED = 80mA, Measure LED current at 95% ILEDX-NOMINAL at VLEDX=0.8V LED Short Detect Threshold 0.1 0.2 0.4 V • VOUT – VLED, LED = 0mA for all DAC code Thermal Regulation 0.01 %/oC Thermal Shutdown Temperature 150 oC Driver turn OFF Thermal Shutdown Hysteresis 10 oC Driver turn ON Output Voltage Regulation (OVR) 5.2 5.3 5.4 V • Flash Mode, ILED = 0mA, VOUT Rising STATUS2 Register: [B7 B6 B5] = 101 OVR value is set by STATUS2 register between 4.55V – 5.6V, all setting have +/- 100mV tolerance Output Voltage Regulation Hysteresis 50 mV Flash Mode, ILED = 0mA RDY Pin Output Trip Threshold VO – 0.1 V STATUS2 Register: [B7 B6 B5] = 101 100mV below actual OVR value. RDY Pin Sink Current 1 mA • SDA, SCL, RESET_N, FLASH Input Logic Low Voltage 0.4 V • SDA, SCL, RESET_N, FLASH Input Logic High Voltage 1.6 V • Turn-Off Time (TOFF) Into Shutdown 50 µs RDY goes low when RESET_N goes from high top low Flash Time Duration Before Standby 0.09 0.11 0.13 s • STATUS1 register [B1 B0]=00 0.18 0.22 0.26 s • STATUS1 register [B1 B0]=01 0.43 0.53 0.63 s • STATUS1 register [B1 B0]=10 0.9 1.1 1.3 s • STATUS1 register [B1 B0]=11 I2C SPECIFICATIONS I2C ADDRESSING FORMAT S XRP6840 Address R/W A Status Data A LED1 Data A LED2 Data A LED3 Data A SP 7-bit 1/0 8-bit 8-bit 8-bit 8-bit Fig. 2: I2C Data Input Format Start Condition Acknowledgement sent by the slave Acknowledgement - sent by the slave when R/W =0 - sent by master when R/W =1 Stop Condition |
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