pam8904 document number: ds37246 rev. 1 - 2 1 of 6 www.diodes.com april 2014 ? diodes incorporated pam8904 new product a product line o f diodes incorporated 18vpp output peizo sounder driver description the pam8904 is a piezo sounder driver with integrated a charge pump boost converter. the pam 8904 is capable for driving a ceramic/piezo sounder with 18vpp from a 3v power supply. the charge pump can operate in either of a 1x, 2x and 3x mode. the boost converter operates at a fixed frequency of 1.0mhz and provides a 9v output with a minimum number of external components. the pam8904 can drive up to 15nf loading. pam unique drive technology provides small inrush current, low emi and high efficiency. pam8904 built-in automatic shutdown and wake up that guarantees longer battery life. pam8904 features thermal shutdown, over current protection, over voltage protection and under voltage lock-out. the pam8904 is available in a 16pin u-qfn3030 package. features ? supply voltage range from 2.3v to 5.5v ? 18v pp output from a 3v supply ? integrated boost converter generates 9v supply ? input signal 20 hz to 300khz ? no voltage cross output at shutdown mode ? low current consumption ? automatic standby and wake-up control ? available in space savi ng packages 16pin qfn package pin assignments u-qfn3030-16l applications ? health care system ? alarm clock ? security device ? home appliance typical applications circuit nc vin cp2 vout cn1 gnd vo2 nc en 1 en2 din nc nc cp1 cn2 vo1-
pam8904 document number: ds37246 rev. 1 - 2 2 of 6 www.diodes.com april 2014 ? diodes incorporated pam8904 new product a product line o f diodes incorporated pin descriptions pin name i/o/p function vin p power supply en1 i charge pump mode select 1 en2 i charge pump mode select 2 din i signal input cn1 i capacitor 1 negative terminal gnd p ground vo2 o positive output vo1 o negative output cn2 i capacitor 2 negative terminal cp1 i capacitor 1 positive terminal vout o boost output cp2 i capacitor 2 positive terminal nc ? no connect absolute maximum ratings (@ t a = +25c, unless otherwise specified.) symbol characteristics value unit v in supply voltage -0.3 to +6.0 v v i en1, en2 gnd -0.3 to v in +0.3 v t a operating free-air temperature range -40 to +85 c t j operating junction temperature range -40 to +150 c t stg storage temperature range -65 to +150 c recommended operating conditions (@ t a = +25c, unless otherwise specified.) symbol characteristics min max unit vin supply voltage 2.3 5.0 v v ih high-level input voltage en1,en2 1.2 to v in +0.3 v v il low-level input voltage en1,en2 -0.3 +0.4 v t a operating free-air temperature -40 +85 c thermal information parameter symbol package maximum unit thermal resistance (junction to ambient) ja u-qfn3030-16l 35 c/w thermal resistance (junction to case) jc u-qfn3030-16l 14 c/w
pam8904 document number: ds37246 rev. 1 - 2 3 of 6 www.diodes.com april 2014 ? diodes incorporated pam8904 new product a product line o f diodes incorporated electrical characteristics (@t a = +25c,vin=3.0v, c piezo =15nf, f din =4khz, unless otherwise specified.) parameter symbol conditions min typ max unit output voltage v out1 1x mode 2.8 3 v v out2 2x mode 5.2 6 v v out3 3x mode 7.2 9 v operating current 1 i dd11 1x mode, c piezo = no load 50 a i dd12 2x mode, c piezo = no load 720 a i dd13 3x mode, c piezo = no load 1700 a operating current 2 i dd21 1x mode, single-ended application 0.3 ma i dd22 2x mode, single-ended application 1.4 ma i dd23 3x mode, single- ended application 3.9 ma operating current 3 i dd31 1x mode, differential application 0.9 ma i dd32 2x mode, differential application 3.6 ma i dd33 3x mode, differential application 7.9 ma shutdown current i sd din = 0v 1 a input frequency f in rectangular pulse 4 khz oscillating frequency f osc 1 mhz vout start delay time t on1 1x mode, from din signal high to 90% v out steady state 270 s t on2 2x mode, from din signal high to 90% v out steady state 320 s t on3 3x mode from din signal high to 90% v out steady state 350 s shutdown delay time t off din = h- >l 42 ms output short-circuit current i sc 40 ma control terminal voltage h vih en1, en2, din pins 0.8*v in v in v control terminal voltage l vil en1, en2, din pins 0 0.2*v in v control terminal current 1 iih1 din = 3v 1 a control terminal current 2 iih2 ven1, ven2 = 3v,din = 3v 1 a control terminal current 3 iih3 ven1, ven2 = 3v, din = 0v 1 a
pam8904 document number: ds37246 rev. 1 - 2 4 of 6 www.diodes.com april 2014 ? diodes incorporated pam8904 new product a product line o f diodes incorporated application information charge pump mode setting din en1 en2 mode 0 ? ? shutdown mode 1 0 0 shutdown mode 1 0 1 1x mode 1 1 0 2x mode 1 1 1 3x mode timing chart
pam8904 document number: ds37246 rev. 1 - 2 5 of 6 www.diodes.com april 2014 ? diodes incorporated pam8904 new product a product line o f diodes incorporated ordering information pam8904 x x x j: u-qfn3030 e: 16 pin r: tape & reel part number package type shipping PAM8904JER u-qfn3030-16l 3,000/tape & reel marking information u-qfn3030-16l package outline dimensions (all dimensions in mm.) please see ap02002 at http://www.diodes.com/dat asheets/ap02002.pdf for the latest version. u-qfn3030-16 type b dim min max typ a 0.55 0.65 0.60 a1 0 0.05 0.02 a3 ? ? 0.15 b 0.18 0.28 0.23 d 2.95 3.05 3.00 d2 1.40 1.60 1.50 e 2.95 3.05 3.00 e2 1.40 1.60 1.50 e ? ? 0.50 l 0.35 0.45 0.40 z ? ? 0.625 all dimensions in mm p8904 xxxyw pin configuration shipping package package type side ? view a a3 a1 bottom ? view d d2 e e b (16x) l (16x) e2 (pin #1 id) z (8x) 0.450 r 0 . 2 0 0
pam8904 document number: ds37246 rev. 1 - 2 6 of 6 www.diodes.com april 2014 ? diodes incorporated pam8904 new product a product line o f diodes incorporated suggested pad layout please see ap02001 at http://www.diodes.com/ datasheets/ap02001.pdf for the latest version 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 rese rve the right to make modifications, enhanc ements, improvements, corrections or ot her changes without further notice to this document and any product descri bed herein. diodes incorporated does not assume any liability ari sing 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 described herein in such applica tions 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 w hatsoever in respect of any products purchased through unauthoriz ed sales channel. should customers purchase or use diodes inco rporated products for any unintended or una uthorized application, customers shall i ndemnify and hold diodes incorporated and its representativ es harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death a ssociated with such unintended or unauthorized application. 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. this document is written in english but may be translated into multiple languages for reference. only the english version of t his document is the final and determinative format released by diodes incorporated. life support diodes incorporated products are specifically not authorized for use as critical com ponents in life support devices or systems without the express written approval of the chief executive offi cer of diodes incorporated. as used herein: a. life support devices or syst ems 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 proper ly 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 devic e or system whose failure to perform can be reasonably expect ed 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 ramifi cations of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-rel ated requirements concerning the ir products and any use of diodes incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or s ystems-related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorporate d and its representatives against any damages arisi ng out of the use of diodes incorporated pr oducts in such safety-critical, life suppor t devices or systems. copyright ? 2013, diodes incorporated www.diodes.com dimensions value (in mm) c 0.500 g 0.150 g1 0.150 x 0.350 x1 1.800 y 0.600 y1 1.800 x (16x) y (16x) c y1 x1 g1 g
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