XRP6840 Datasheet, PDF (8/17 Pages) Exar Corporation – 4.3A Supercapacitor Flash LED Driver with I2C

XRP6840
4.3A Supercapacitor Flash LED Driver with I²C
Fig. 11: 0.11s Flash Duration with 0.55F Supercap at 4.3A,
LED V_F < 3.8V, CH1 = FLASH, CH2 = RDY, CH3 =V_OUT,
CH4 = I_LED =2A/div
Fig. 12: 0.22s Flash Duration with 0.9F Supercap at 4.3A,
LED V_F < 3.8V, CH1 = FLASH, CH2 = RDY, CH3 =V_OUT,
CH4 = I_LED =2A/div
Fig. 13: 200mA High Efficiency Torch Mode with 0.55F
Supercap, CH1=V_IN, CH2=V_OUT, CH3=LED_X,
CH4=I_VIN =0.5A/div
Fig. 14: 200mA Torch Mode with 0.55F Supercap, CH1=V_IN,
CH2=V_OUT, CH3=LED_X, CH4=I_VIN =0.5A/div
Fig. 15: LED Current Settling Time: 0mA to 100mA.
CH1=SDA, CH2=SCL, CH4=I_LED=0.1A/div
Fig. 16: LED Current Settling Time: 100mA to 200mA.
CH1=SDA, CH2=SCL, CH4=I_LED=0.1A/div
© 2009 Exar Corporation
8/17
Rev. 1.0.0