View FAN561106_3102240.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

tm november 2006 low-dropout led drivers for wh ite, blue, or any color led ? 2003 fairchild semiconductor corporation www.fairchildsemi.com fan5611/fan5612/fan5613/fan5614 rev. 1.0.9 fan5611/fan5612/fan5613/fan5614 low-dropout led drivers for white, blue, or any color led features led drivers for parallel-connected leds (2 to 4) 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 fan5611, fan5613 feature up to 160ma bias current (up to 40ma for each led) fan5612 features up to 120ma bias current (up to 40ma for each led) fan5614 features up to 160ma bias current (up to 80ma for each led) enable/shutdown control (fan5612, fan5613, fan5614) shutdown current < 1 a small footprint sc-70 and mlp applications cell phones pda, dsc, mp3 players handheld computers lcd display modules keyboard backlight led displays description the fan5611/12/13/14 low-dropout product family is designed to drive two to four parallel leds, providing matched current source bias for all color leds. the led current is set by an external resistor, r set . the fan5611/13 supports four parallel leds with up to 160ma bias current (up to 40ma per output). the fan5612 supports three leds with up to 120ma bias current (40ma per output). the fan5614 drives two high-current leds (80ma pe r output). pin i1 should always be connected to an led to provide a matched current for any additional leds. the fan5612/13 and 14 are selected using an enable pin. when the chip is not selected (enable pin is low), the supply current drops to less than 1a. the fan5611, fan5612, and fan5614 are available in an sc-70 package. the fan5611 and fan5613 are available in mlp packages. ordering information table 1. ordering information product number package type order code fan5611 6-lead sc-70 / 2x2mm 6-lead mlp fan5611s7x / fan5611mpx fan5612 6-lead sc-70 fan5612s7x fan5613 2x2mm 8-lead mlp fan5613mpx fan5614 6-lead sc-70 fan5614s7x
fan5611/fan5612/fan5613/fan5614 ? 2003 fairchild semiconductor corporation www.fairchildsemi.com fan5611/fan5612/fan5613/fan5614 rev. 1.0.9 2 typical applications figure 1. typical applications for fan5611, fan5612, fan5613, fan5614 pin assignments figure 2. pin assignments for fan5 611, fan5612, fan5613, fan5614 i set r set i1 i2 i3 i4 v in gnd fan5611 four diode control ctrl v control (3v ) i set r set i1 i2 i3 i4 v in gnd fan5613 four diode control with on/off ctrl v control (3v) enable on/off r set two diode control with on/off i3/i4 i1/i2 v in gnd fan5614 ctrl v control (3v) i set on/off ena ble r set three diode control with on/off i1 i2 i3 v in gnd fan5612 ctrl v control (3v) i set on/off enable 6-lead sc-70 i2 i4 gnd ctrl fan5611 i1 i3 1 3 4 6 25 fan5614 gnd on/off ctrl 1 34 6 25 n/c i1/i2 i3/i4 fan5612 ctrl i3 gnd i2 i1 on/off 1 34 6 25 2x2mm 8-lead mlp fan5613 top view gnd on/off i4 i3 i2 i1 ctrl nc 2x2mm 6-lead mpx fan5611 d3 d2 ctrl d4 gnd d1 top view gnd
fan5611/fan5612/fan5613/fan5614 ? 2003 fairchild semiconductor corporation www.fairchildsemi.com fan5611/fan5612/fan5613/fan5614 rev. 1.0.9 3 pin descriptions table 2. pin descriptions notes: 1. the dap of fan 5611mpx can be tied to the gnd pin or le ft floating. for better pow er dissipation, tie to gnd. pin # name description fan5611 fan5612 fan5613 fan5614 1 ctrl ctrl ctrl sets led current (see operational descripton) on/off chip on/off/disable 2 i2 i2 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 4gndgndgndgndground 5 i4 connect to cathode of led i3 connect to cathode of led i1 connect to cathode of led i3/i4 connect to cathode of led 6 i3 connect to cathode of led on/off on/off chip on/off/disable i2 connect to cathode of led 7 ctrl sets led current (see operational descripton) 8 nc no connection
fan5611/fan5612/fan5613/fan5614 ? 2003 fairchild semiconductor corporation www.fairchildsemi.com fan5611/fan5612/fan5613/fan5614 rev. 1.0.9 4 absolute maximum ratings the ?absolute maximum ratings? are those values beyond wh ich the safety of the device cannot be guaranteed. the device should not be operated at these limits. the parametric values defined in the electrical characteristics tables are not guaranteed at the absolute maximum ratings. the ?r ecommended operating conditions? table defines the condi- tions for actual device operation. table 3. absolute maximum ratings recommended oper ating conditions table 4. recommended operating conditions notes: 2. using mil std. 883e, method 3015.7 (human body model) and eia/jesd22c101-a (charge device model). parameter min. max. unit v i1 , v i2 , v i3 , v i4 and enable voltage to gnd -0.3 6.0 v ctrl voltage to gnd -0.3 3.0 power dissipated by package at t a = 85c 6-lead sc70 190 mw 6, 8-lead mlp 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 c junction temperature 150 c storage temperature -55 150 c electrostatic discharge protection (esd) level (1) hbm 4 kv cdm 1 parameter min. typ. max. unit led cathode voltage fan5611, fan5612, fan5613 0.3 0.5 1.0 v fan5614 0.15 ambient temperature -40 25 85 c
fan5611/fan5612/fan5613/fan5614 ? 2003 fairchild semiconductor corporation www.fairchildsemi.com fan5611/fan5612/fan5613/fan5614 rev. 1.0.9 5 dc electrical characteristics v in = 3.3v to 5.5v, enable = v in , t a = 25c unless otherwise noted. table 5. dc electrical characteristics notes: 3. enable ?on? is v en where i i1 >20ma @ v i1 =0.3v, while enable ?off? is v en where i i1 <1 a @ v i1 >0.3v. parameter conditions min. typ. max. units current gain fan5611/12/13 i set = 100a v sat = 300mv 140 200 260 fan5614 i set = 100a v sat = 150mv led current (per diode) fan5611/12/13 v sat = 300mv i set = 100a 20 ma fan5614 v sat = 150mv i set = 100a led to led current matching fan5611/12/13 v sat = 300mv i set = 100a t a = -40c to 85c -3 3 % fan5614 v sat = 150mv i set = 100a t a = -40c to 85c peak efficiency v in = 3v 90 % current in off mode (i set and i i )v en = 0v 1 a minimum enable ?on voltage? (2) (fan5612, fan5613, fan5614) i set = 150a 2.8 v maximum enable ?off voltage? (2) (fan5612, fan5613 fan5614) 0.5 v
fan5611/fan5612/fan5613/fan5614 ? 2003 fairchild semiconductor corporation www.fairchildsemi.com fan5611/fan5612/fan5613/fan5614 rev. 1.0.9 6 typical performance characteristics figure 3. fan5611/12/13 output current vs. temerature figure 4. i set vs. v ctrl figure 5. fan5611/12/13 led current vs. led cathode voltage figure 6. fan5614 led current vs. led cathode voltage figure 7. fan5611/12/13 led current vs. set resistor figure 8. fan5614 led current vs. set resistor
fan5611/fan5612/fan5613/fan5614 ? 2003 fairchild semiconductor corporation www.fairchildsemi.com fan5611/fan5612/fan5613/fan5614 rev. 1.0.9 7 typical performance characteristics (continued) figure 9. fan5611/12/13/14 control voltage transient response figure 10. fan5612/13/14 enable voltage transient response
fan5611/fan5612/fan5613/fan5614 ? 2003 fairchild semiconductor corporation www.fairchildsemi.com fan5611/fan5612/fan5613/fan5614 rev. 1.0.9 8 application information operational descripton the regulated current through each led is a multiplica- tion of the i set current. the i set value is determined by the r set value. the i set value can be calculated as: i set = i led / current gain reference figure 4, the i set vs. v ctrl graph, to esti- mate v ctrl . the value of r set is calculated according to the formula: r set = (v control - v ctrl ) / i set for example, with v control = 3v, a 10ma current limit through the led results in i set = 50a. that translates to an approximate value of 1.2v for v ctrl , shown in fig- ure 4. the resulting r set value that maintains 10ma reg- ulation is 36k . the led intensity can be ad justed by varying the duty cycle of a square wave applied to the enable pin. fre- quency greater than 100hz is best to avoid a "flickering" effect. the maximum operation frequency is 10mhz. efficiency considerations the fan561x driver?s low-dropout architecture can sig- nificantly improve the efficiency compared to using sim- ple ballast resistors. the system efficiency, defined as the ratio between the leds? power and the input sup- plied power, can be calculated as: the lower the v cathode , the higher the system effi- ciency. efficiency can be further improved by 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 allows the device s 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 led drivers can be used in the applica- tions presented, 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 5ma typical current available for the leds. the single cell li-ion is utilized in applications like ce ll phones or digital still cam- eras. in most cases, the li-ion battery voltage level only goes down to 3.0v voltage level, not down to the full dis- charge level (2.7v) befor e requesting the charger. ?v drop < 0.3v ?v f (at 20ma) < 3.1v (low v f ) ?v in (at 20ma) =v drop + v f = 3.4v ?v in (at 5ma typical) ~ 3.1v where v in = single cell li-ion voltage. key advantages: ? no boost circuit is needed for the lcd or keyboard backlight. ? drivers are directly connected to a li-ion battery. ? no emi, no switching noise, no boost efficiency 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. driving these leds with the maximum current of 20ma for maximum brightness, usually requires a boost circuit for a single cell li-ion voltage range. 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. ?v drop < 0.3v ?v f (at 20ma) < 3.3v to 4.0v (high v f ) ?v in (at 20ma) =v drop + v f = 3.6v to 4.3v ?v in (at 5ma typical) ~ 3.3v where v in = existing bus = 3.3v to 4.3v. key advantages: ? no boost circuit is 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. efficiency v in v cathode ? () v in ? = i set r set i1 i2 i3 i4 v in gnd fan5613 ctrl v control enable on/off
fan5611/fan5612/fan5613/fan5614 ? 2003 fairchild semiconductor corporation www.fairchildsemi.com fan5611/fan5612/fan5613/fan5614 rev. 1.0.9 9 example 3: drive white, bl ue, red, amber leds string assuming a boost circuit or existing voltage bus, the fan561x series of led drivers can be used to drive a whole string of leds with flexible brightness control via analog and/or pwm. . ?v drop < 0.3v ?v in_min = n v f + v drop ?v 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 flexible brightness con- trol. these control methods ca n be applied to the circuit in two different ways to provide more flexibility than other solutions. to determine the value of r set , use the i set vs. v ctrl graph in figure 4. 1. fan5611 - analog set v control and r set for led current using: - 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 using: - 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 using: on/off = pwm ? amplitude has no effect on current. ? pulse width controls between 0 and maximum. v in i set r set i1 i2 i3 i4 gnd fan5613 ctrl v control 'n' number of leds per branch on/off enable i set r set i1 i2 i3 i4 v in gnd fan5611 ctrl v control (3v ) i led 200 v control v ctrl ? () r set ------------------------------------------------------------------------- = r set i1 i2 i3 v in gnd fan5612 ctrl v control i set on/off enable i led 200 v control v ctrl ? () r set ------------------------------------------------------------------------- = i led 200 i set
fan5611/fan5612/fan5613/fan5614 ? 2003 fairchild semiconductor corporation www.fairchildsemi.com fan5611/fan5612/fan5613/fan5614 rev. 1.0.9 10 3. fan5613 - analog set v control and r set for led current using: - 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 using: 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 using: - 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 using: on/off = pwm ? amplitude has no effect on current. ? pulse width controls between 0 and maximum. i set r set i1 i2 i3 i4 v in v ss fan5613 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 fan5614 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 ? 2003 fairchild semiconductor corporation www.fairchildsemi.com fan5611/fan5612/fan5613/fan5614 rev. 1.0.9 11 mechanical dimensions 2x2mm 6-lead mlp
fan5611/fan5612/fan5613/fan5614 ? 2003 fairchild semiconductor corporation www.fairchildsemi.com fan5611/fan5612/fan5613/fan5614 rev. 1.0.9 12 mechanical dimensions 2x2mm 8-lead mlp
fan5611/fan5612/fan5613/fan5614 ? 2003 fairchild semiconductor corporation www.fairchildsemi.com fan5611/fan5612/fan5613/fan5614 rev. 1.0.9 13 mechanical dimensions 6-lead sc-70 package
fan5611/fan5612/fan5613/fan5614 ? 2003 fairchild semiconductor corporation www.fairchildsemi.com fan5611/fan5612/fan5613/fan5614 rev. 1.0.9 14

▲Up To Search▲

Price & Availability of FAN561106

	To Download FAN561106 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .