SP7682 EXAR [Exar Corporation], SP7682 Datasheet
SP7682
Related parts for SP7682
SP7682 Summary of contents
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... Lead Free, RoHS Compliant Packaging: Space saving 16-pin 3X3mm QFN package The SP7682 or SP7682A provides a complete LED backlight and flash solution that is designed to drive 4 low current LEDs for backlighting and a single channel high current output for a LED flash. The SP7682 and SP7682A have serial interfaces that can program the backlight LED current in steps of 0 ...
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... TOUT0, TOUT1 Driver shutdown 0.4 V Driver enabled 1.6 SP7682: Backlight and Flash Driver Page 2 ABSOLUTE MAXIMUM RATINGS , V ..............-0.3V to 6.0V FLASH LED ELECTRICAL SPECIFICATIONS = -40°C to +85°C, Tj=-40°C to +125°C. A CONDITIONS = 0V (shutdown 25°C EN <30mA, 80mA< I <500mA LED FLASH ...
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... Note 4: I ≤6mA. Cb =total capacitance of one bus line in pF. t SINK Note5: Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns. SP7682A: SINGLE LINE PROGRAMMABLE SERIAL INTERFACE SPECIFICATIONS PARAMETER SET_BL, SET_FL logic low threshold SET_BL, SET_FL logic high threshold ...
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... Connect external flying capacitors between these pins. 15,16 C1+, C1- Thermal - Connect thermal pad to PGND pin. Pad Sept 27-07 rev G DESCRIPTION 2 C bus. Multiple functions can be programmed through his SP7682: Backlight and Flash Driver Page 4 PIN DESCRIPTION 2 C interface between 0mA 2 C interface between © 2007 Exar Corporation ...
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... Sept 27-07 rev G SP7682: Backlight and Flash Driver Page 5 FUNCTIONAL DIAGRAM © 2007 Exar Corporation ...
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... Flash time-out mode. When used for a momentary Flash output recommended to activate the I control for timeout. Once the I for as long as the Flash is active, the SP7682 charge pump will operate in 2x mode in order to provide the continuous voltage and high current needed for Flash. ...
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... D s=15mA 4LE D s=20mA 4LE D s=25mA 100 3.9 4.2 100 4LE Ds=15mA 4LE Ds=20mA 4LE Ds=25mA 3.9 4.2 SP7682: Backlight and Flash Driver Page 7 Backlight & Flash V Efficiency OU T 4LE D s=20mA ,F lash=0mA 4LE D s=20mA ,F lash=100mA 4LE D s=20mA ,F lash=200mA 3.0 3.3 3.6 Vin (V) Backlight & Flash Output Current Vs V ...
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... OUT IN 3.9 4.2 400mA 2x Timeout Mode Ripple 3.9 4.2 400mA Forced 1.5x Mode Ripple Vs V OUT IN 3.9 4.2 400mA Auto Mode 1. Mode Ripple SP7682: Backlight and Flash Driver Page 8 Vin(AC) Vout(AC) Vin(AC) Vout(AC) Vin(AC) Vout(AC) © 2007 Exar Corporation ...
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... Ch2=Vout Ch4=Iin 0.2A/div LEDs = 20mA 1.5x Startup from Shutdown Ch2=Vout Ch4=Iin 0.2A/div Flash = 200mA 1.5x Startup from Shutdown Ch2=Vout Ch4=Iin 0.2A/div Flash = 400mA 2x Timeout Startup from SHDN SP7682: Backlight and Flash Driver Page 9 Ch2=Vout Ch4=Iin 0.2A/div Ch1=EN Ch2=Vout Ch4=Iin 0.2A/div Ch1=EN Ch2=Vout Ch4=Iin 0.2A/div © ...
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... SP7682A SET_FL=31 Pulses Flash=0.3A 2s Sept 27-07 rev G TYPICAL PERFORMANCE CHARACTERISTICS = 25°C unless otherwise noted. A Ch2=Vout Ch4=Iin 0.2A/div SP7682A SET_BL=41 Pulses LEDs=20mA, 1.5x Ch2=Vout Ch4=Iin 0.2A/div SP7682A SET_FL=31 Pulses Flash = 0.3A 2x Ch2=Vout Ch4=Iin 0.2A/div SP7682 TD0=TD1=0V Flash=0.3A 4s SP7682: Backlight and Flash Driver Page 10 Ch1=SET_BL Ch2=Vout Ch4=Iin 0.2A/div Ch1=SET_FL ...
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... LE D4 3.9 4.2 20mA Backlight: 1.5x Mode Ripple Ch2=LEDx Ch4=Iin 0.2A/div Turn-off time into SHDN Flash=0.3A Ch2=Vout Ch4=Iin 0.2A/div Settle last count Standby LEDs=20mA 1.5x SP7682: Backlight and Flash Driver Page 11 Ch1=Vin Ch2=Vout Ch1=EN Ch2=FLASH Ch4=Iin 0.5A/div Ch1=SCL Ch2=Vout Ch4=Iin 0.5A/div © 2007 Exar Corporation ...
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... Theory of Operation - I²C Serial Interface The SP7682 has four data registers which can be programmed serially via the I²C interface. The first register is a status register which has two bits used for shutdown/power up options, 4 bits used for individual backlight LED ON/OFF control, and 2 bits for charge pump mode ...
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... The following table defines the states for bits WZ and WP. These bits can be used to put the SP7682 into shutdown, standby or active State Shutdown, data registers are reset 000000 Shutdown, data 0 1 unchanged Standby. Output current is zero, data ...
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... SP7682: Backlight and Flash Driver Page 14 APPLICATIONS INFORMATION Flash Flash B7-B2 (mA) (mA) 0 320 100000 10 330 100001 20 340 100010 30 350 100011 40 360 100100 50 370 100101 60 380 100110 70 ...
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... SP7682A Single Line Programmable Serial Interface SET_FL (or SET_BL) pin programming waveform shown below: EN SET_FL t =0.5us to 0.25ms t =0.5us min LO HI 10mA 0mA I FLASH In the above example code 5 is programmed as there are five rising edges. Serially Programmable Codes Flash Code Table (programmed via SETFL) ...
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... SP7682 is in the 1x mode. When V is less than the V required on the constant current-sink outputs of the LEDs) the SP7682 is in the 1.5x mode or 2x mode and in these modes the input current is 1.5 times or 2 times the output current and therefore the efficiency will be reduced. ...
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... See table 1 for capacitor selection. Thermal Protection The SP7682 has a thermal protection circuit that will shut down the internal LDO and charge pump if the die temperature rises above the thermal limit, and will restart when the die temperature drops about 20° ...
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... Sept 27-07 rev G SP7682: Backlight and Flash Driver Page 18 PACKAGE: 3x3mm 16 pin QFN © 2007 Exar Corporation ...
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... Yes 33.3 -40 85 Yes 33.3 Not Applicable to Eval Board -40 85 Sipexsupport@sipex.com http://www.sipex.com/content.aspx?p=support http://www.sipex.com/applicationNotes.aspx SP7682: Backlight and Flash Driver Page 19 ORDERING INFORMATION MSL Level Pack Type Quantity Package L3 @ 260ºC Canister Any L3 @ 260ºC Tape & Reel 3000 L3 @ 260ºC Canister Any L3 @ 260º ...