ace410 2e 2.5a, 3mhz switching charger with dynamic power path management ver 1. 1 1 d escription ACE4102E is a switching li - ion battery charger with dynamic power - path control and input current limiting. when a battery is connected, depending on the battery voltage, the dc - dc switching regulator either pre - conditions, fast - charges the bat tery or just regulates a system voltage (v sys ) to a preset voltage. it does not require an external sense resistor for current sensing. the charging current is determined by programming iset1 or iset2 pin, depending on the state of the usb_det. if usb_det is low, indicating an valid ac adapter input is present, the charge current is set by iset1; otherwise, it is set by iset2. when the battery voltage reaches the termination voltage i.e. 4.2v/ 4.35v, the charging path disconnects sys to batt. the ACE4102E a lso includes a dynamic power path when the sys load current exceeds current limit of the dcdc regulator internally set, the sys voltage falls below v batt , ACE4102E turns on the power - path to supplement the system load through the batter . features ? switchin g charger with power path management ? up to 95% dc - dc efficiency ? 50m power path mosfet ? up to 2.5a max charging current ? instant on with a dead battery or no battery ? no battery detection ? no external sense resistor ? programmable usb and ac in charging current application ? tablet, mid ? smart phone ? power bank typical application ace4102 e 2a switching charger with dynamic power path
ace410 2e 2.5a, 3mhz switching charger with dynamic power path management ver 1.1 2 absolute maximum ratings p arameter m ax in , batt voltage - 0.3v ~ 6v all other pin voltage vin - 0.3v ~ vin0.3v sw,sys,batt to ground current internally limited operating temperature range - 40 o c ~ 85 o c storage temperature range - 55 o c ~ 150 o c thermal resistance ja 50 o c /w (note: exceeding these limits may damage the device. exposure to absolute maximum rating conditions for long periods may affect device reliability.) packaging type qfn3x3 - 16 sys iset2 in iset1 sw gnd sw stat q fn3 x 3 - 1 6 description function 1 .15 sys system voltage pin. it is also the switching re gulator?s output pin. connect an d inductor and capacitor to form the output filter 2 in input pin. can be connected to an ac adaptor or a usb charger output. bypass with a 10 uf capacitor each to gnd and pgnd 3 .4 sw switching node of the switching regulat or. connect a 1 u h to 2.2 u h inductor from this pin to sys 5 pgnd power ground. bypass with a 10u f capacitor to in with a shortest possible trace 6 enb active low enable pin. tie this pin low to enable the charging, tie high to disable charging, while stil l keeping powerpath from batt to sys 7 ntc thermistor input 8.10 gnd analog ground pin. bypass with a 10 u f capacitor to in batt sys batt usb_det pgnd enb ntc gnd
ace410 2e 2.5a, 3mhz switching charger with dynamic power path management ver 1.1 3 9 stats status pin for charging status indications. an open drain device capable of driving 10ma current 11 iset1 ac fast charg e current set pin for ac input. connecting a resistor between iset1 to gnd this sets the fast charge current value for ac adapter when usb_det is low. 12 iset2 usb charge current set pin for usb input. connecting a resistor between iset2 to gnd this se ts the charge current value for usb input when usb_det is high. 13 usb_det charge current selecting input. pull this pin low if an ac adapter is connected and select fast charging current to be set by iset1. and set this pin high if a usb input is connect ed and select usb charging current to be set by iset2. it is default low. 14.16 batt battery pin. connect a battery to this pin ordering information ace410 2e xx xx + h electrical characteristics (v in = 5v, unless otherwise specified. ty pical values are at ta = 25 o c ) parameter conditions min typ max units in input input range 4.4 5 .5 v input uvlo rising, hys=500mv 4.35 v input operating current switcher enable, switching 5 ua switcher enable, no switching 70 ua batt to in put leakage current input floating 0 5 ua dc - dc and sys output vsysmin i sys =1a, default 3.6 v vsysmax 4.5 v load regulation 40 mv/a line regulation v in =4.75 to 5.25v 0.04 %/v switching frequency 3 mhz max duty 100 % highside mos r dson i sw =500ma 100 m ? lowside mos rdson i sw =500ma 60 m ? highside current limit 3.5 a cn: qfn3*3 - 16 pb - free halogen - free 42 ------- 4.2v 43 ------- 4.35v
ace410 2e 2.5a, 3mhz switching charger with dynamic power path management ver 1.1 4 sys uvlo falling, hys=200mv 2.25 v thermal shutdown rising, hys=30oc 160 o c power path management batt to sys rdson 50 m ? battery charger battery cv voltage i bat =0ma, default 4.16 4.2 4.24 v 4.307 4.35 4.393 charger restart threshold from done to fastcharge - 200 mv battery pre - condition voltage v bat rising hys=180mv 2.9 v pre - condition charge current 100 ma ac fast charge current r iset1 =500, usb_det= lo w icharge=1v*1000/r iset1 2 a usb charge current r iset2 =2k, usb_det= high icharge=1v*1000/r iset2 0.5 a pre - condition timer 120 min fast - charge timer 120 min thermistor monitor ntc threshold, cold charger suspended 76.5 %v in ntc threshold , hot charger suspended 35 %v in ntc threshold hysteresis 1.5 %v in ntc disable threshold 100 mv ntc input leakage 0 ua logic input, stats enb logic input high 1.6 v enb logic input low 0.3 v stat output low voltage i stats =10ma 0.2 v typical characteristics efficiency vs i sys charger disabled i charge vs v batt i pre - charge vs v batt i out (a) v batt (v) v batt (v)
ace410 2e 2.5a, 3mhz switching charger with dynamic power path management ver 1.1 5 v sys v s i sys v sys v s temperature i charge v s temperature thermal foldback i sys (a) temperature( ) temperature( ) battery inserted during detection battery pulled during charging in plug - in with battery connected 1s/div 0.5s/div 5ms/div v sys load step into reduce charging v sys load step into supplement mode v sys load step into in dppm mode, iin limit=0.5a 50ms/div 50ms/div 50ms/div
ace410 2e 2.5a, 3mhz switching charger with dynamic power path management ver 1.1 6 dcdc pfm switching wavefrom dcdc pwm switching waveform in unplugged i sys =10ma i sys =2a 10ms/div 0.5us/div 200us/div typical application 2a switching charger with dynamic power path with ovp protection and charge enable
ace410 2e 2.5a, 3mhz switching charger with dynamic power path management ver 1.1 7 pcb guideline pcb layout cautions of ACE4102E is shown below. the input capacitor (cin) between vin (pin2) and pgnd (pin5) is always to be placed closest to the ic. sw wire can be laid through the gap between the 2 cin terminals. it can go underneath the cin. for all pins that needs to shorte d to gnd, please connect them to gnd (pin10), not to pgnd (pin5). a real pcb layout example is also listed below for reference. pcb cautions of ACE4102E real demo board pcb for reference
ace410 2e 2.5a, 3mhz switching charger with dynamic power path management ver 1.1 8 packing information q fn3*3 - 16 n ote: all dimensions refer to jedec standrad mo - 220 weed -4. symbol dimensions in millimeters m in . nom. m ax . a 0.70 0.75 0.80 a1 - 0.02 0.05 a3 0.20ref b 0. 20 0.2 5 0. 30 d 2.90 3.00 3.10 e 2. 9 0 3.0 0 3 . 1 0 d2 1.55 1.65 1.75 e2 1.55 1.65 1.75 e 0.40 0.50 0.60 k 0.20 - - l 0.35 0.40 0.45 r 0.09 - -
ace410 2e 2.5a, 3mhz switching charger with dynamic power path management ver 1.1 9 notes ace does not assume any responsibility for use as critical components in life support devices or systems without the express written approval of the president and general counsel of ace electronics co., ltd. as sued herein: 1. life support devices or systems are devices or systems which, (a) are inte nded for surgical implant into the body, or (b) support or sustain life, and shoes 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 to the u ser. 2. a critical component is 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. ace technology co., l td. http://www.ace - ele.com/
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