AL3159 high efficiency 1x/2x charge pump for white led applications AL3159 document number: ds35048 rev. 2 - 2 1 of 10 www.diodes.com january 2011 ? diodes incorporated new product description the AL3159 is a low noise, constant frequency charge pump dc/dc converter that uses a dual mode load switch (1x), and (2x) conversion for white led applicat ions. the AL3159 is capable of driving nine led channels at 20ma from a 2.7v to 5.5v input. the current sinks may be operated using three simple logic control inputs individually or in parallel fo r driving higher-current leds. low external part counts (one 1f flying capacitor and two 2.2f capacitors at v in and v out ) make this part ideally suited for small, battery-powered applications. AL3159 digital inputs are used to enable or disable the led channels with a fixed default current settings at 20ma or other factory programming options available. each output of the AL3159 is equipped with built-in protection for v out short circuit and auto-disable fo r led short conditions. built-in soft-start circuitry prevents excessive inrush current during start-up and mode switching. a low-current shutdown feature disconnects the load from v in to reduce quiescent current less than 1a. the AL3159 is available in a lead- free, space-saving, thermally enhanced 20-pin 3 x 3mm qfn package. features ? v in range: 2.7v to 5.5v ? up to 93% max power efficiency ? 1% current matching accuracy between channels ? drives up to 9 configur able channels of leds ? three simple logic decoding led on/off control inputs ? low transition threshold voltage typical 150 mv ? dual-mode 1x and 2x charge pump ? 1.2 mhz constant switching frequency ? v out short circuit and thermal protections ? soft start for reducing inrush current ? i q <1a in shutdown ? thermally-enhanced qfn3030-20 package: available in ?green? molding compound (no br, sb) ? lead free finish/ rohs compliant (note 1) pin assignments applications ? mobile phone white led backlighting and indicators ? pda white led backlighting ? battery-operated phone main and sub screen white led backlighting notes: 1. eu directive 2002/95/ec (rohs). a ll applicable rohs exemptions app lied. please visit our website at http://www.diodes.com/products/lead_free.html typical application circuit
AL3159 high efficiency 1x/2x charge pump for white led applications AL3159 document number: ds35048 rev. 2 - 2 2 of 10 www.diodes.com january 2011 ? diodes incorporated new product pin descriptions pin name pin number description d8 1 current sink input #8. connected to v out when un-used. d9 2 current sink input #9. connected to v out when un-used. ctl1 3 control pin 1 ctl3 4 control pin 3 ctl2 5 control pin 2 pgnd 6 charge pump switch ground cn 7 negative terminal of flying capacitor v in 8 input power supply. requires 2.2f capacitor between this pin and ground. cp 9 positive terminal of flying capacitor nc 10,19 no-connect v out 11 charge pump output to drive load circuit. requires 2.2f capacitor between this pin and ground. d1 12 current sink input #1. connected to v out when un-used. d2 13 current sink input #2. connected to v out when un-used. d3 14 current sink input #3. connected to v out when un-used. d4 15 current sink input #4. connected to v out when un-used. d5 16 current sink input #5. connected to v out when un-used. gnd 17 ground d6 18 current sink input #6. connected to v out when un-used. d7 20 current sink input #7. connected to v out when un-used. gnd ep pad exposed pad (bottom). connected to gnd directly underneath the package. functional block diagram
AL3159 high efficiency 1x/2x charge pump for white led applications AL3159 document number: ds35048 rev. 2 - 2 3 of 10 www.diodes.com january 2011 ? diodes incorporated new product absolute maximum ratings (note 2) symbol description rating unit esd hbm human body model esd protection 2 kv esd mm machine model esd protection 200 v v in input voltage -0.3 to 6 v v ctl1,2,3 ctl1, ctl2, ctl3 to gnd voltage -0.3 to v in +0.3 v i out maximum dc output current 270 ma t j operating junction temperature range 150 c t lead maximum soldering temperature (at leads, 10 sec) 300 c notes: 2. exceeding absolute maximum ratings will cause permanent damage to the device. recommended operating conditions symbol parameter min max unit v in input voltage 2.7 5.5 v t a operating ambient temperature -40 85 c electrical characteristics (t a = 25 c, v in = 3.6v, c in = c out = 2.2f, c 1 = 1f unless otherwise noted) symbol parameter test conditions min typ. max unit i q quiescent current 1x mode, 3.0 v in 5.5, active, no load current 0.3 0.6 ma 2x mode, 3.0 v in 5.5, active, no load current 2 5 i shdn shutdown current ctl1, ctl2 and ctl3 = 0 1 a i dx i sink current accuracy (note 3) 19 20 21 ma i d-match current matching between any two current sink inputs (note 4) v f : d1:d9 = 3.6v 1 2 % r out open loop v out resistance 1x mode 0.5 2 x mode 4.5 v th 1x to 2x transition threshold at any i sink pin i dx = 20ma 150 mv v hs mode transition hysteresis 250 mv t ss soft-start time 100 s fsw switching frequency 1.2 mhz v ctl1, 2,3 (l) ctl1,2,3 threshold low v in = 2.7v 0.4 v v ctl1,2,3(h) ctl1,2,3 threshold high v in = 5.5v 1.4 v t ctl1,2,3 ctl1,2,3 off timeout 200 s uvlo v in under-voltage lockout 1.8 2 2.2 v i ctl1,2,3 ctl1,2,3 input leakage -1 1 a t shdn thermal shutdown protection 160 c t hys thermal shutdown hysteresis 10 c ja thermal resistance junction-to- ambient qfn3030-20 (note 5) 48 o c/w notes: 3. determined by the average current levels of all active channels 4. defined as the deviation of any sink current from the average of all active current channels. 5. device mounted on fr-4 substrate, 2"*2 ", 2oz copper, double-sided pc board, with minimum recommended pad on to p layer and 4 vias to bottom layer.
AL3159 high efficiency 1x/2x charge pump for white led applications AL3159 document number: ds35048 rev. 2 - 2 4 of 10 www.diodes.com january 2011 ? diodes incorporated new product typical performance characteristics turn-on to 1x mode 50us/div turn-on to 2x mode 100us/div turn-off from 1x mode 200ms/div turn-off from 2x mode 200ms/div load characteristics in 2x mode 1us/div load characteristics in 2x mode 1us/div vout 2v/div ctl1,2,3 2v/div v in =4.2v t a =25c i l =20ma iin 200ma/div cp 2v/div vout 2v/div ctl1,2,3 2v/div iin 200ma/div cp 2v/div v in =3.0v t a =25c i l =20ma cp 2v/div vout 2v/div ctl1,2,3 2v/div iin 200ma/div cp 2v/div v in =3.0v t a =25c i l =20ma iin 200ma/div v in =4.2v t a =25c i l =20ma ctl1,2,3 2v/div vout 2v/div v in =2.7v t a =25c i l =20ma vin 200mv ac /div vout 200mv ac /div iin 100ma ac /div v in =3.0v t a =25c i l =20ma vin 200mv ac /div vout 200mv ac /div iin 100ma/div
AL3159 high efficiency 1x/2x charge pump for white led applications AL3159 document number: ds35048 rev. 2 - 2 5 of 10 www.diodes.com january 2011 ? diodes incorporated new product typical performance char acteristics (continued) v f =3.1v t a =25c i l =20ma v in =3.6v v in =3.6 v v ctl(h) v ctl(l) v in =2.7v v in =3.6v channels 1 to 9 channels 1 to 9 t a =25c
AL3159 high efficiency 1x/2x charge pump for white led applications AL3159 document number: ds35048 rev. 2 - 2 6 of 10 www.diodes.com january 2011 ? diodes incorporated new product functional description the AL3159 is a dual-mode high efficiency charge pump (1x and 2x) device, driving nine led channels with three simple logic control inputs, intended for white led backlight applications. an internal comparator circuit compares the voltage at each constant current sink input against a reference voltage. to ensure maximum power efficiency, the most appropriate switching mode (1x and 2x) is automatically selected. the AL3159 requires only three external components: one 1 f ceramic flying capacitor (c 1 ) for the charge pump, one 2.2f ceramic input capacitor (c in ), and one 2.2f ceramic charge pump output capacitor (c out ). the each output channel of the AL3159 can drive nine individual leds with a maximum current of fixed manufacture setting (20ma or 30ma) per channel. these can be paralleled to give a total maximum output current of 270ma. disabled current sinks unused current channels must be disabled by connecting the sinks to vout with only a small sense current flowing through the disabled channel. soft-start soft-start is incorporated to prevent excessive inrush current during power-up, mode switching, and transitioning out of stand-by mode. short-circuit protection short-circuit protection function is incorporated to prevent excessive load current when either flying cap terminals or output pin electrically tied to a very lower voltage or ground. over-voltage protection over-voltage protection function is incorporated to limit the output voltage under a safe value to avoid on-chip device breakdown. under-voltage lockout under-voltage lockout feature disables the device when the input voltage drops below uvlo threshold. thermal auto shutdown when the die temperature exceeds the thermal limit, the device will be disabled and enter stand-by mode. the operation resumes whenever the die cools off sufficiently. ctl<3:1> led on/off control 000 all off 001 led1~led2 on 010 led3~led5 on 011 led6~led9 on 100 led9 on 101 led6~led8 on 110 led1~led5 on 111 all on
AL3159 high efficiency 1x/2x charge pump for white led applications AL3159 document number: ds35048 rev. 2 - 2 7 of 10 www.diodes.com january 2011 ? diodes incorporated new product ordering information package fs : qfn3030-20 al 3159 fs g - 7 packing 7 : tape & reel green g : green device package code packaging (note 7 and 8) 7? tape and reel quantity part number suffix AL3159fsg-7 fs qfn3030-20 3000/tape & reel -7 notes: 7. pad layout as shown on diodes inc. suggested pad la yout document ap02001, which can be found on our website at http://www.diodes.c om/datasheets/ap02001.pdf 8. eu directive 2002/95/ec (rohs). all applicable ro hs exemptions applied. please visit our website at http://www.diodes.com /products/lead_free.html marking information (1) qfn3030-20 (top view) xy x x w y : year : 0~9 x : a~z : green xx : b9 : AL3159 w : week : a~z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week part number package identification code AL3159fsg qfn3030-20 b9
AL3159 high efficiency 1x/2x charge pump for white led applications AL3159 document number: ds35048 rev. 2 - 2 8 of 10 www.diodes.com january 2011 ? diodes incorporated new product package outline dimensions (all dimensions in mm) package type: qfn3030-20 pad layout top view bottom view side view 2.95/3.05 2.95/3.05 0.30/0.40 1.70/1.90 0.57/0.63 0.05 max. 0.15 typ. (pin #1 id) 0.10 c 0.08 c seating plane a b c 0.10 c ab 0.25 a 2x- 0.25 b 2x - 0.16/0.26 0.40 cl pin1 5 20 15 10 1.70/1.90 0.595 typ.
AL3159 high efficiency 1x/2x charge pump for white led applications AL3159 document number: ds35048 rev. 2 - 2 9 of 10 www.diodes.com january 2011 ? diodes incorporated new product taping orientation (note 9) notes: 9. the taping orientation of the other package type can be found on our website at http://www.diodes .com/datasheets/a p02007.pdf
AL3159 high efficiency 1x/2x charge pump for white led applications AL3159 document number: ds35048 rev. 2 - 2 10 of 10 www.diodes.com january 2011 ? diodes incorporated new product important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or ot her changes without further notice to this document and any product described herein. diodes incorporated does not assume any liabi lity arising out of the application or use of this document or any product described herein; neither does diodes incorporated convey any license under its patent or trademark rights, nor the rights of others. any customer or user of this document or products desc ribed herein in such applications shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthoriz ed sales channel. should customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall indemnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fee s arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized a pplication. products described herein may be covered by one or more united states, international or foreign patents pending. product names and markings noted herein may also be covered by one or more united states, international or foreign trademarks. life support diodes incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the chief executive officer of diodes incorporated. as used herein: a. life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of diodes incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorporated and its representatives against any damages arising out of the use of diodes incorporated products in such safety-critical, life support devices or systems. copyright ? 2011, diodes incorporated www.diodes.com
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