SP6887ER4-L Exar Corporation, SP6887ER4-L Datasheet
SP6887ER4-L
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SP6887ER4-L Summary of contents
Page 1
... DC voltage to set the RSET pin current, adding a switched resistor in parallel with RSET or applying a PWM signal to CTRx pin or EN pin. Rev. C – 10/31/2007 Digital Cameras PDAs MP3 Players TYPICAL APPLICATION CIRCUIT SP6887 4 Channel WLED Driver 1/ DESCRIPTION , connected SET © 2007 Exar Corporation ...
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... Control Lines CTR2 CTR1 Logic high ( Logic low (or GND LED output off IN Rev. C – 10/31/2007 CTR0 LED4 LED3 Table 1: LED Enable Logic SP6887 4 Channel WLED Driver 2/10 BLOCK DIAGRAM LED Output LED2 LED1 - - © 2007 Exar Corporation ...
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... Lead Temperature ................................. 300ºC IN ESD Ratings – Human Body Model ........... 2000V IN Ambient Temperature ...............-40ºC to +85ºC ILED per LED ..............................0mA to 30mA Symbol θ SP6887 4 Channel WLED Driver 3/10 PIN DESCRIPTION Package Max Unit TQFN-16 34 ºC TQFN-16 2.9 W © 2007 Exar Corporation ...
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... Efficiency vs Output Current (4 LEDs) SP6887 4 Channel WLED Driver 4/10 Min Typ. Max Unit 2.7 5.5 V 0.05 1 µA 0.6 1 1.19 1.23 1.25 V 5.0 15.0 mA 30.0 ±5 % ±3 % 1.7 Ω 4.3 1.0 MHz 3.45 V 3.60 0.4 0.6 0 µA 1.5 V 0.4 V © 2007 Exar Corporation ...
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... LED Current vs Input Voltage (4 LEDs) 5. Ground Current vs Input Voltage 7. Output Voltage vs Input Voltage Rev. C – 10/31/2007 ELECTRICAL SPECIFICATIONS 4. Supply Current vs Input Voltage (4 LEDs) 6. Oscillator Frequency vs Input Voltage 8. Output Resistance vs Input Voltage SP6887 4 Channel WLED Driver 5/10 © 2007 Exar Corporation ...
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... LED Current Setting Using RSET 11. LED Current Setting Using a PWM Signal to EN Pin 12. LED Current Setting Using a PWM Signal to CTR0 Pin Rev. C – 10/31/2007 ELECTRICAL SPECIFICATIONS 10. LED Current Setting Using a DC Voltage to SP6887 4 Channel WLED Driver 6/10 RSET Pin © 2007 Exar Corporation ...
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... LED current. Values of RSET for a fixed LED current are given in Table 2, “RSET SP6887 4 Channel WLED Driver 7/10 THEORY OF OPERATION CTR0, CTR1 and CTR2, pin, in which case, RSET establishes © 2007 Exar Corporation and the the ...
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... ILED. Frequency <100Hz can naturally cause the LEDs to blink visibly. circuit. PWM ILED (mA) 13.3 10.9 8.4 6.0 3.6 1.1 Figure 2: PWM Signal at CTR0 Pin for LED SP6887 4 Channel WLED Driver 8/10 THEORY OF OPERATION Control = ( LED_ON ON OFF PWM frequency Current Control © 2007 Exar Corporation is ...
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... PCB and allows the heat dissipated by the driver IC to spread out resulting performance. SP6887 4 Channel WLED Driver 9/10 THEORY OF OPERATION mode, the 1MHz switching hole) centered in in excellent thermal Figure 4: PCB Lay-out © 2007 Exar Corporation the ...
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... Units: mm (angles in degrees) Coplanarity applies to the exposed pads as well as terminals DAP is 1.90mm x 1.90mm Part Number Temperature Range SP6887ER4-L SP6887ER4-L/TR “Y” = Year, “WW” = Work Week, “X” = first alpha of lot number Rev. C – 10/31/2007 Operating Package -40ºC to +85ºC Thin QFN-16 -40º ...