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www.fairchildsemi.com rev. 1.0.4 6/4/04 t ypical applications i set r set i1 i2 i3 i4 v in gnd fa n5611 f our diode control ctrl v control (3v ) i set r set i1 i2 i3 i4 v in gnd fa n5613 f our diode control with on/off ctrl v control (3v) enable on/off r set tw o diode control with on/off i3/i4 i1/i2 v in gnd fa n5614 ctrl v control (3v) i set on/off ena ble r set three diode control with on/off i1 i2 i3 v in gnd f an5612 ctrl v control (3v) i set on/off enable features led drivers for parallel-connected leds ultra-low voltage drop (< 300mv) to support direct li-ion applications no emi, no switching noise no external components needed for current matching both analog and pwm brightness control ? an5611, fan5613 feature up to 160ma bias current (up to 40ma for each led) ? an5612 features up to 120ma bias current (up to 40ma for each led) ? an5614 features up to 160ma bias current (up to 80ma for each led) enable/shutdown control (fan5612, fan5613, f an5614) shutdown current < 1 a small footprint sc-70 and 2x2 mlp applications cell phones ? d a, dsc, mp3 players handheld computers lcd display modules ? e yboard backlight led displays general description the fan5611/fan5612/fan5613/fan5614 driver family provides matched current source bias for white, blue or any color leds. the current in the leds can be programmed by an external resistor. the individual led currents are 200 x i set , where i set is the current through the external resistor connected to the ctrl pin. the fan5611 and the fan5613 are capable of driving four leds, while the fan5612 can drive three leds. the fan5614 is designated to drive two high current leds. in any case, at least i1 should be always connected to an led in order to have the other leds driven with a matched current to i1. the fan5612, fan5613 and fan5614 have enable pin. when these devices are disabled, the supply current drops to less than 1 a. the fan5611, fan5612 and fan5614 drivers are available in a 6-lead sc-70 package. the fan5613 is available in an 8-lead mlp package. f an5611/fan5612/fan5613/fan5614 low-dropout led drivers for white, blue or any color led
fan5611/fan5612/fan5613/fan5614 product specification 2 rev. 1.0.4 6/4/04 pin assignments pin description (6-lead sc-70 and 8-lead mlp) pin no. pin name description f an5611 fan5612 fan5613 fan5614 1 ctrl ctrl ctrl sets led current on/off chip on/off/disable 2i 2i 2 connect to cathode of led i3 connect to cathode of led i1/i2 3 i1 i1 connect to cathode of led i4 connect to cathode of led n/c no connection 4 gnd gnd gnd gnd ground 5i 4 connect to cathode of led i3 connect to cathode of led i1 connect to cathode of led i3/i4 connect to cathode of led 6i 3 connect to cathode of led on/off on/off chip on/off/disable i2 connect to cathode of led 7 ctrl sets led current 8n c no connection 6-lead sc-70 package 2x2mm 8-lead mlp package fa n5613 i2 i4 gnd ctrl f an5611 i1 i3 1 3 4 6 25 f an5612 ctrl i3 gnd i2 i1 on/off 1 34 6 25 f an5614 gnd on/off ctrl gnd on/off i4 i3 i2 i1 ctrl nc t op view 1 34 6 25 n/c i1/i2 i3/i4
product specification fan5611/fan5612/fan5613/fan5614 rev. 1.0.4 6/4/04 3 absolute maximum ratings (note1) recommended operating conditions notes: 1. functional operation under these conditions is not implied. performance and reliability are guaranteed only if operating conditions are not exceeded. 2. using mil std. 883e, method 3015.7(human body model) and eia/jesd22c101-a (charge device model) p arameter min max unit v i1 , v i2 , v i3 , v i4 and enable voltage to gnd -0.3 6 v ctrl voltage to gnd -0.3 3 power dissipated by package at t a = 85? 6 lead-sc70 190 mw 8 lead-mlp2x2 700 i1, i2, i3, i4 steady state current fan5611/12/13 40 ma i1/i2, i3/i4 steady state current fan5614 80 lead temperature (soldering 10 seconds) 300 ? junction temperature 150 ? storage temperature -55 150 ? electrostatic discharge protection (esd) level (note2) hbm 4 kv cdm 1 p arameter min typ max unit led cathode voltage fan5611, fan5612, fan5613 0.3 0.5 1 v f an5614 0.15 ambient temperature -40 25 85 ?
fan5611/fan5612/fan5613/fan5614 product specification 4 rev. 1.0.4 6/4/04 dc electrical characteristics (v in = 3.3v to 5.5v, enable = v in , t a = 25? unless otherwise noted) notes: 3. enable ?n?is v en for which i i1 >20ma @ v i1 =0.3v, while enable ?ff?is v en for which i i1 <1 a @ v i1 >0.3v p arameter conditions min. typ. max. units output current multiplication ratio fan5611/12/13 i set = 100? v sat = 300mv 140 200 260 fan5614 i set = 100? v sat = 150mv led current (per diode) fan5611/12/13 v sat = 300mv i set = 100? 20 ma fan5614 v sat = 150mv i set = 100? led to led current matching fan5611/12/13 v sat = 300mv i set = 100? t a = -40? to 85? -3 3 % fan5614 v sat = 150mv i set = 100? t a = -40? to 85? peak efficiency v in = 3v 90 % current in off mode (i set and i i ) v en = 0v 1 a min. enable ?n voltage?(note3) (fan5612, fan5613, fan5614) i set = 150? 3 v max. enable ?ff voltage?(note3) (fan5612, fan5613 fan5614) 0.5 v
product specification fan5611/fan5612/fan5613/fan5614 rev. 1.0.4 6/4/04 5 t ypical performance characteristics ambient temperature (c) led cathode voltage (v) set resistor (k ? ) set resistor (k ? ) led cathode voltage (v) v ctrl (v) output current (ma) led current (ma) led current (ma) led current (ma) led current (ma) 12 -40 -20 0 20 40 60 80 100 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.2 0.4 0.6 0.8 1.0 02040608 0 100 20 40 60 80 100 120 140 160 1.2 1.4 1.6 1.8 14 16 18 20 22 24 4 6 8 10 12 14 16 18 20 22 output current vs. temperature i set vs. v ctrl i set (a) 0 50 100 150 200 0 10 15 20 25 30 2 4 6 8 10 12 14 16 18 20 22 5 10 15 20 25 30 35 fan5614 led current vs. led cathode voltage fan5611_12_13 led current vs. led cathode voltage fan5614 led current vs. set resistor fan5611_12_13 led current vs. set resistor cathode voltage = 0.3v fan5611_12_13 for i set = 0.1ma for i set = 100a for i set = 50a for i set = 50a for i set = 25a for i set = 0.05ma cathode voltage = 0.3v cathode voltage = 0.15v cathode voltage = 0.10v cathode voltage = 0.05v cathode voltage = 0.5v v control = 3v v control = 3v cathode voltage = 0.6v cathode voltage = 0.4v 0.3v 0.25v 0.20v
fan5611/fan5612/fan5613/fan5614 product specification 6 rev. 1.0.4 6/4/04 t ypical performance characteristics (cont.) time (1s/div) led current (10ma/div) ctrl voltage (2v/div) control voltage transient response fan5611_12_13_14 enable voltage transient response fan5612_13_14 time (1s/div) led current (20ma/div) enable voltage (2v/div)
product specification fan5611/fan5612/fan5613/fan5614 rev. 1.0.4 6/4/04 7 application information setting the led current the current ?wing into leds is approximately 200 times greater then the current i set . the led current is controlled by v control and r set according to the formula: f or v control = 3v and a speci?d led current, the r set v alue can be evaluated using the diagram shown in the typi- cal performance characteristics section. for any other option, i set value can be determined using the graph i set vs. v ctrl . the leds brightness can also be adjusted by driving enable or the ctrl pin with a pwm signal. the driving signal frequency should be greater than 100hz to av oid ?ckering, increasing to more than 1mhz, if necessary. leds are very sensitive to temperature. in most cases the maximum allowed junction temperature is 100?. this tem- perature is the result of adding to the ambient temperature the over temperature due to power dissipation, is described by as follows: where t j is the led junction temperature, t a is the ambient temperature, ja is the junction to ambient thermal resis- tance, i is the led current and v f is the led forward v oltage. the fan5611 to fan5614 are designed to reduce the current through leds, when the temperature rises and the cathode voltage increases, as can be seen from typical the "led current vs. led cathode voltage" graph under the t ypical performance characteristics section. ef?ciency considerations the fan561x drivers low dropout architecture can signi? cantly improve the ef?iency compared to using simple ballast resistors. the system ef?iency, de?ed as the ratio between the leds power and the input supplied power can be calculated as follows: the lower the v cathode , the higher the system ef?iency. ef?iency can be further improved using a higher v in with more leds as shown in example 3. application notes the ultra-low voltage drop across the fan561x series of led drivers, allow the devices to drive white, blue, and other color leds in a wide range of input voltages. the driver can be used in many applications. although, only the fan5613 is shown in all three examples, any of the fan561x series of led drivers can be used in the applications presented in this document, due to their similar operation. example 1: drive low v f white or blue leds directly from single cell li-ion when using white or blue low v f leds, and utilizing the drivers low voltage drop, only 3.4v in v in is needed for the full 20ma led current. at 3.1v, there is still 5ma typical current available for the leds. the single cell li-ion is utilized in most applications like cell phones or digital still cameras. in most cases, the li-ion battery voltage level only goes down to 3.0v voltage level, and not down to the full discharge level (2.7v) before requesting the charger. ? drop < 0.3v ? f (at 20ma) < 3.1v (low v f ) ? in (at 20ma) =v drop + v f = 3.4v ? in (at 5ma typical) ~ 3.1v where v in = single cell li-ion voltage key advantages: no boost circuit needed for the lcd or keyboard backlight drivers directly connected to a li-ion battery no emi, no switching noise, no boost ef?iency lost, no capacitor, and no inductor. example 2: drive high v f white or blue leds from existing bus from 4.0v to 5.5v high v f white or blue leds have forward voltage drop in the range of 3.2v to 4.0v. to drive these leds with the maximum current of 20ma for maximum brightness, usually requires a boost circuit for a single cell li-ion voltage range. i led 200 v control v ctrl () r set ? = t j t a ja iv f + = efficiency v in v cathode () v in ? = i set r set i1 i2 i3 i4 v in gnd f an5613 ctrl v control enable on/off
fan5611/fan5612/fan5613/fan5614 product specification 8 rev. 1.0.4 6/4/04 in some cases, there is already a voltage bus in the system, which can be utilized. due to the ultra-low voltage drop of the fan561x series of led drivers to drive high v f white or blue leds. the v in needs to be only 300mv higher than the highest v f in the circuit. ? drop < 0.3v ? f (at 20ma) < 3.3v to 4.0v (high v f ) ? in (at 20ma) =v drop + v f = 3.6v to 4.3v ? in (at 5ma typical) ~ 3.3v where v in = existing bus = 3.3v to 4.3v key advantages: no boost circuit needed for lcd or keyboard backlight driver utilizes the existing bus ultra-low voltage drop provides the full 20ma led current at the lowest possible voltage level. example 3: drive white, blue, red, amber leds string assuming boost circuit, or existing voltage bus, the f an561x series of led drivers can be used to drive a whole string of leds and ?xible brightness control - analog and/or pwm. ? drop < 0.3v ? in_min = n v f + v drop ? in _max = n v f + 5.5v where v in = existing bus, boost voltage key advantage: no need for current matching resistors and discrete transistor for brightness control led brightness control all of the fan561x led drivers feature analog and pwm controls to give designers ?xible brightness control. these control methods can be applied to the circuit in two different w ays, to provide more ?xibility than any other solution. to determine the value of r set , use the ? set vs. v ctrl ?graph under the typical performance characteristics section. 1. fan5611 - analog set v control and r set for led current - pwm v control = pwm amplitude sets maximum led current pulse width controls between 0 and maximum 2. fan5612 - analog set v control and r set for led current - pwm - 1 v control = pwm i set r set i1 i2 i3 i4 v in gnd f an5613 ctrl v control enable on/off v in i set r set i1 i2 i3 i4 gnd f an5613 ctrl v control 'n' number of leds per branch on/off enable i set r set i1 i2 i3 i4 v in gnd f an5611 ctrl v control (3v ) i led 200 v control v ctrl () r set ------------------------------------------------------------------------- = r set i1 i2 i3 v in gnd f an5612 ctrl v control i set on/off enable i led 200 v control v ctrl () r set ------------------------------------------------------------------------- =
product specification fan5611/fan5612/fan5613/fan5614 rev. 1.0.4 6/4/04 9 amplitude sets maximum led current pulse width controls between 0 and maximum - pwm - 2 set v control and r set for maximum led current on/off = pwm amplitude has no effect on current pulse width controls between 0 and maximum 3. fan5613 - analog set v control and r set for led current - pwm - 1 v control = pwm amplitude sets maximum led current pulse width controls between 0 and maximum - pwm - 2 set v control and r set for maximum led current on/off = pwm amplitude has no effect on current pulse width controls between 0 and maximum 4. fan5614 - analog set v control and r set for led current - pwm - 1 v control = pwm amplitude sets maximum led current pulse width controls between 0 and maximum - pwm - 2 set v control and r set for maximum led current on/off = pwm amplitude has no effect on current pulse width controls between 0 and maximum i led 200 i set i set r set i1 i2 i3 i4 v in v ss f an5613 ctrl v control enable on/off i led 200 v control v ctrl () r set ------------------------------------------------------------------------- = i led 200 i set r set i3/i4 i1/i2 v in v ss f an5614 ctrl v control i set on/off enable i led 200 v control v ctrl () r set ------------------------------------------------------------------------- = i led 200 i set i led 200 v control v ctrl () r set ------------------------------------------------------------------------- =
fan5611/fan5612/fan5613/fan5614 product specification 10 rev. 1.0.4 6/4/04 mechanical dimensions 2mmx 2mm 8-lead mlp 2.0 a b 1.40 0.70 1.00 2.55 0.30 typ 0.50 typ (0.78) 1 4 8 5 2.0 top view side view bottom view 1.0 max 0.10 0.08 (0.20) 0.05 0.00 1.25 1.20 0.45 0.20 pin #1 ident 0.65 0.60 0.50 1.50 0.18~0.30 0.10 c c ab 0.10 m m 14 85 seating plane c c c recommended land pattern notes: a. conforms to jedec registration mo-229, variation vccd-3, dated 11/2001 b. dimensions are in millimeters. c. dimensions and tolerances per asme y14.5m, 1994 0.15 0.15 c c 2x 2x
product specification fan5611/fan5612/fan5613/fan5614 rev. 1.0.4 6/4/04 11 mechanical dimensions 6-lead sc-70 package 2.00 0.20 (0.25) 0.65 c c 0.65 0.50 min symm c l 1.30 (0.43) 2.10 0.30 1.30 0.30 0.15 1.10 0.80 0.10 0.00 0.25 0.10 0.45 0.30 detail a scale: 2x 30 0 (r0.10) notes: unless otherwise specified this package conforms to eiaj sc-88a, 1996. a) all dimensions are in millimeters. b) dimensions do not include burrs or mold flash. c) gage plane 0.20 1.00 0.80 seating plane 0.40 min land pattern recommendation see detail a 0.10 a b m 1.25 0.10 1.90 64 13 b
fan5611/fan5612/fan5613/fan5614 product specification 6/4/04 0.0m 005 stock#ds30005611 ? 2004 fairchild semiconductor corporation life support policy fairchild? products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. ordering information product number package type order code f an5611 6-lead sc-70 fan5611s7x f an5612 6-lead sc-70 FAN5612S7X f an5613 2mm x 2mm 8-lead mlp fan5613mpx f an5614 6-lead sc-70 fan5614s7x

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