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| innovative power tm - 1 - www.active - semi.com copyright ? 2016 active - semi, inc. features ? dedicated single - chip integrated battery power manager ? dual cell battery charger with cell balancing management ? auto detection support usb bc1.2, chinese yd/t 1591 - 2009, apple 2.4a, and samsung devices ? passed apple mfi test ? 4.5v - 5.5v input voltage with 3.4a input current limit ? 2.4a+1.0a dual outputs with cc r egulation ? 5.07v+/ - 1% output with prioritized power path from input to output ? 4.2v/4.35v +/ - 0.5% battery charge voltage accuracy of each cell ? output plug - in detection wakeup and no load detection sleep mode ? optimized power path and battery charge control ? <10ua low battery drainage current ? i2c port for optimal system performance and status reporting ? configurable charge, discharge and hz modes ? >92% charge and discharge efficiency at 3.4a output for full battery range ? 4 modes of led operation ? preconditioning for deeply depleted battery ? weak input sources accommodation ? safety: ? input over - voltage protection ? nearly zero power short circuit protection ? output over - voltage protection ? battery over - charge and over - discharge protections ? charge/discharge thermal regulation ? tqfn5x5 - 40 package applications ? backup battery pack ? power bank ? mobile power ? standalone battery charger with usb output general description ACT2804 is a space - saving and dedicated single - chip solution for dual - cell battery charge and discharge. it takes 5v usb input source to charge a dual cell battery with boost configuration in three phases: preconditioning, constant current, and constant voltage. charge is terminated when the current reaches 10% of the fast charge rate. the battery charger is thermally regulated at 110?c with charge current foldback. if input 5v is not present, ACT2804 discharge a dual cell battery with buck configuration to provide 5.07v+/ - 1% to output ports. there is a power path from input to output. the cycle - by - cycle peak current mode control, constant current regulation, short circuit protection and over voltage protection maximize safe operation. ACT2804 provides 4 led drive pins for battery capacity level and charge status indication to indicate 25%, 50%, 75%, and 75% above battery level with battery impedance compensation. the led indication patterns are programmable . ACT2804 is available in a thermally enhanced 5mmx5mm qfn55 - 40 package with exposed pad. 5v/3.4a dual cell backup battery power manager rev 2, feb - 04 - 2016 ACT2804 buck output cc/cv buck output voltage (v) 6.0 5.0 4.0 3.0 2.0 1.0 0 output current (ma) 0 500 1000 1500 2000 2500 3000 v bat = 8.2v v bat = 6.0v 1a output 2.4a output csn 2 csn 1 csp vout hsb bat bats batp batc cbd batn ics t th vreg a gnd pb led 1 led 2 led 3 led 4 rimc 4 . 7 uh act 2804 pgnd 22 uf vin sw 4 . 5 v - 5 . 5 v v in 5 . 07 v / 2 . 4 a 5 . 07 v / 1 a v out 2 v out 1 25 m 25 m 25 m 22 uf 22 uf 1 uf 22 uf 22 uf 5 1 0 5 1 0 47 540 k 8 k 10 k 47 nf
rev 2, feb - 04 - 2016 innovative power tm - 2 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 ordering information part number junction temperature package pins battery cell voltage ACT2804qj - t - 40?c to 150?c qfn55 - 40 40 4.20v ACT2804qj - t0435 - 40?c to 150?c qfn55 - 40 40 4.35v pin configuration top view csn 2 csn 1 csp vout vout vin vin scl sda pgnd hsb sw sw bat bat bats batp batc cbd led 3 led 2 led 1 pb a gnd vreg th icst batn led 4 dp dm hyst rimc pt ledls 4 ledls 3 ledls 2 ledls 1 ovgate ovsens p gnd act 2804 rev 2, feb - 04 - 2016 innovative power tm - 3 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 pin descriptions pin name description 1 csn2 output current sense negative input for channel 2. 2 csn1 output current sense negative input for channel 1. 3 csp output current sense positive input. 4, 5 vout power output pin. 6, 7 vin usb or ac adapter input. 8 ovgate output to drive optional external nmos protect ic from over voltage . 9 ovsens usb or ac adapter input sense. 10 scl i2c clock input. 11 sda i2c data input. 12 pgnd power ground. directly connect this pin to ic thermal pad and connect 10uf or 22uf high quality capacitors from bat to pgnd on the same layer with ic. 13 hsb high side bias pin . connect a 47nf ceramic capacitor from hsb to sw. 14,15 sw internal switch connected to a terminal of the output inductor. 16,17 bat bat connection. connect it to battery current sense positive terminal. bypass bat pin to pgnd pin with high quality ceramic capacitors on the same layer with ic. 18 bats battery charge current sense input. connect to charge sense resistor positive terminal with kevin sense. 19 batp connect to charge sense resistor negative terminal and battery positive terminal. 20 batc battery central point connection. connect to dual battery cell common terminal. 21 cbd cell balancing discharge. connect to a discharge resistor from this pin to battery common terminal. 22 batn battery negative terminal. 23 icst fast charge current setting pin. connect a resistor from this pin to agnd to set the charging current. the current setting ranges from 0.5a - 1.8a. the voltage at this pin reflects the charge current and discharge current in charge mode and discharge mode, respectively. 24 th temperature sensing input. connect to a battery thermistor terminal. 25 vreg + 5v bias output. connect a 1.0uf to this pin. this pin supplies up to 50ma output current. the bias turns on in charge mode and discharge mode. internal register bit can shut down the bias. bias turns off in hz mode. rev 2, feb - 04 - 2016 innovative power tm - 4 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 pin descriptions pin name description 26 agnd logic ground output. connect this pin to the exposed pgnd pad on same layer with ic. 27 pb push button input. when this pin is pushed for more than 40ms, led1 - 4 indicators are ena- bled for 5 seconds. 28 led1 battery level indicator. 29 led2 battery level indicator. 30 led3 battery level indicator. 31 led4 battery level indicator. 32 ledls1 led1 threshold level shift. connect a resistor from the pin to agnd to shift led1 threshold. 33 ledls2 led2 threshold level shift. connect a resistor from the pin to agnd to shift led2 threshold. 34 ledls3 led3 threshold level shift. connect a resistor from the pin to agnd to shift led3 threshold. 35 ledls4 led4 threshold level shift. connect a resistor from the pin to agnd to shift led4 threshold. 36 pt led indication mode input. the 5 modes of led indication patterns are set by a voltage at this pin. connect a resistor at the pin to set the voltage and an led indication pattern. 37 rimc rimc battery impedance compensation input. 38 hyst the hysteresis window setting input. connect a resistor at the pin to set the hysteresis win- dows for led1, 2, 3, 4. 39 dm output port auto detection input. connected to portable device d - . 40 dp output port auto detection input. connected to portable device d+. 41 pgnd exposed pad. must be soldered to ground plane layer(s) on the pcb for best electrical and thermal conductivity. rev 2, feb - 04 - 2016 innovative power tm - 5 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 absolute maximum rat ings ? parameter value unit ledls1, ledls2, ledls3, ledls4, rimc, hyst and pt to gnd - 0.3 to +6 v led1, led2, led3 and led4 to gnd - 0.3 to +6 v pb, dm, dp, th, scl, sda and icst to gnd - 0.3 to +6 v ovsens to gnd - 0.3 to +16 v ovgate to gnd - 0.3 to +12 v vin, vout and vreg to gnd - 0.3 to +6 v csp to csn2, csp to csn1, csp to vout - 0.3 to +0.3 v bat to bats, bats to batp - 0.3 to +0.3 v batc to batn - 0.3 to +6 v bat to batc - 0.3 to +6 v batn to gnd - 0.3 to +0.3 v cbd to bat - 6 to +0.3 v batn to cbd - 6 to +0.3 v sw to pgnd - 0.3 to +12 v hsb to sw - 0.3 to +6 v junction to ambient thermal resistance ( ja ) 40 /w operating junction temperature (t j ) - 40 to 150 operating temperature range (t a ) - 40 to 85 store temperature - 55 to 150 lead temperature (soldering, 10 sec) 300 do not exceed these limits to prevent damage to the device. exposure to absolute maximum rating conditions for long periods may affect device reliability. rev 2, feb - 04 - 2016 innovative power tm - 6 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 parameter test conditions min typ max unit input current limit, over voltage protection, output under voltage protection input voltage range 4.5 5.5 v input over voltage protection vin rising, v in _ovp 5.5 5.7 5.9 v input over voltage hysteresis vin falling, vin_ovp_hyst 290 mv input under voltage lock - out vin rising, v in _uvlo 4.2 v input under voltage lock - out hysteresis vin falling, vin_uvlo_hyst 200 mv input current limit setting range - 10% 3.4 +10% a output under voltage protection (uvp) vout falling, vout_uvp 3.65 v output under voltage protection hysteresis vout rising, vout_uvp_hyst 200 mv q1 wait time in hiccup mode 3 s boost mode/charge mode switching frequency - 15% 400 +15% khz precondition voltage threshold of each cell vbat1,2 rising 2.8 v preconditioning current percentage of fast charge current 15 % boost charger uvlo vout rising, bst_uvlo 4.2 v battery end - of - charge voltage vbat_eoc (ACT2804qj - t) - 0.5% 4.2 +0.5% v vbat_eoc (ACT2804qj - t0435) - 0.5% 4.35 +0.5% v end of charge detection current percentage of fast charge current 10 % buck mode/discharge buck under voltage lock - out vabt falling, vbat1, 2 2.9 v vout output regulation voltage reg3[1:0]=00 5.07 v reg3[1:0]=01 5.12 v reg3[1:0]=10 5.17 v reg3[1:0]=11 5.22 v vout1 and vout2 current limit rcs1=25m , icc1 1.05 1.25 1.40 a rcs2=25m , icc2 2.45 2.65 2.85 a electrical character istics (v in = 5v, t a = 25c, unless otherwise specified.) rev 2, feb - 04 - 2016 innovative power tm - 7 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 parameter test conditions min typ max unit buck converter under voltage protection threshold vout falling goes into hiccup 3.65 v buck converter over voltage protection threshold vout rising, bck_ovp 5.7 v buck convert hiccup time 3.4 s buck converter light - load cut - off current 5 10 15 ma buck converter light - load cut - off deglitch time 12.5 s high side switch peak current limit all condition 4.5 a over temperature protection otp 160 over temperature protection hysteresis otp_hyst 20 battery protection battery over charge current 2.6 3 a battery over voltage percentage of eoc voltage 101.5 102.5 103.5 % battery under voltage and short circuit protection 1.6 v preconditioning timer if timer expires, goes to latch - off 1 hr th pull - up current charge mode 140 ua discharge mode 100 ua th high threshold charge mode 2.5 v discharge mode 2.5 v th low threshold charge mode 1 v discharge mode 0.57 v system management vreg output current 50 ma pb rising threshold pb rising, discharge mode 0.95 v pb falling threshold pb falling, discharge mode 0.75 v pb internal pull up resistance pull up to internal supply 1.2 m fault condition alarm frequency 0.5s on and 0.5s off 1.0 hz fault condition alarm timer 10 s electrical character istics (v in = 5v, t a = 25c, unless otherwise specified.) rev 2, feb - 04 - 2016 innovative power tm - 8 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 parameter test conditions min typ max unit led indication led1 - 4 indication level setting 5.5 8.8 v led sink current 3 ma led1 - 4 scan interval for each led pattern before lighting leds 0.5 s electrical character istics (v in = 5v, t a = 25c, unless otherwise specified.) rev 2, feb - 04 - 2016 innovative power tm - 9 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 electrical character istics (v in = 5v, t a = 25c, unless otherwise specified.) notes: 1. comply to i2c timings for 1mhiz operation - fast mode plus 2. no internal timeout for i2c operations 3. this is a i2c system specification only. rise and fall time of scl & sda not controlled by the device. 4. device address is 7 h5a - read address is 8 hb4 and write is 8 hb5 parameter test conditions min typ max unit scl, sda input low v cc = 5v 0.4 v scl, sda input high v cc = 5v 1. 25 v sda leakage current sda=5v 1 a sda output low i ol = 5ma 0.3 5 v scl clock frequency, f scl 0 1000 khz scl low period, t low 0.5 s scl high period, t high 0.26 s sda data setup time, t su 50 ns sda data hold time, t hd see note: 1 0 ns start setup time, t st for start condition 260 ns stop setup time, t sp for stop condition 260 ns capacitance on scl or sda pin 10 pf sda fall time sda, t of device requirement 120 ns rise time of both sda and scl, t r see note: 3 120 ns fall time of both sda and scl, t f see note: 3 120 ns pulse width of spikes must be sup- pressed on scl and sda 0 50 ns sda scl t st t su t hd t sp t scl start condition stop condition rev 2, feb - 04 - 2016 innovative power tm - 10 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 ACT2804 is a complete battery charging and discharging power management solution for applications of dull - cell lithium - based backup battery pack or power bank. with the advanced bidirectional architecture, a synchronous boost/buck converter is connected from vout to switching node (sw). the converter could be configured as either boost to charge battery or buck to discharge battery. modes of operation ACT2804 has 3 operation modes: charge mode, discharge mode, and high - impedance (hz) mode. high impedance (hz) mode hz mode is the default mode. in hz mode, all the switches are turned off , only pb circuit alive and the ic draws less than 10ua current from vbat. discharge mode in discharge mode, buck converter operates in cv/ cc regulation. vout1 current limit is set at 1.25a and vout2 current limit is set at 2.65a. charge mode ACT2804 is configured in charge mode (boost mode) when vin is valid. in this mode, a battery is charged with trickle, preconditioning, fast charge, top - off and end of charge (eoc). the typical charge management is shown in figure 1. precondition charge when operating in precondition state, the cell is charged at a reduced current at 15% of the programmed maximum fast charge constant current. once v bat reaches the precondition threshold voltage the state machine jumps to the fast charge state. fast charge if battery voltage is above preconditioning threshold, boost converter charges battery with constant current. in fast charge state, the ACT2804 charges at the current set by the external resistor connected at the icst pin. during a normal charge cycle fast charge continues in cc mode until v bat reaches the charge termination voltage, at which point the ACT2804 charges in top off state. top off device transitions from fast charge (cc) to top off (cv), and moves to eoc (end of charge) state when charging current is less than i eoc . end of charge in top off mode, when charges current decreases to 10% of set fast charge current, the boost converter goes into end of charge mode and keep monitoring the battery voltage. recharge in eoc, device would re - charge batteries when both battery voltage levels drops 5% below v eoc . battery removal if the battery is removed, boost converter regulates at the programmed regulation voltage. cell balance cell balance is activated in both fast charge and top off modes. each battery is connected with a parallel bleeding switch. push button pb is always watched in hz mode and discharge mode. if the push but on pb is pressed for >40ms in hz mode, the led (s) will turn on for 5 seconds. in the mean time, discharge mode is enabled. functional description a: precondition state b: fast - charge state c: top - off state d: end - of - charge state figure 1. typical li+ charge profile and ACT2804 charge states v e o c f a s t c h a r g e b c u r r e n t v p r e c h a r g e p r e c o n d i t i o n c h a r g e c u r r e n t a b c d s t a t e b r e c h a r g e c u r r e n t v o l t a g e e n d - o f - c h a r g e c u r r e n t rev 2, feb - 04 - 2016 innovative power tm - 11 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 applications informa tion fast charge current control the block diagram in figure 2 shows how battery current is sensed for charge current control. figure 2: battery current monitoring a small percentage of charge current is sensed and sinked into a resistor connected at pin icst. in charge mode, this would allow user to set fast charge current based on the following equation. for example, i c =1a with r cs =25m and r icst =8k . recommended ricst is shown in following table: during discharge mode, inputs of battery current sense amp are flipped to sense discharge current, and voltage level at pin icst can be used (by the system) to monitor the magnitude of discharge current based on the following equation. for example: v icst =0.4v with i_discharge=1a, and r icst =8k . led threshold setting led1, led2, led3 and led4 thresholds are adjustable with external resistors r ls1 , r ls2 , r ls3 , and r ls4 connected from ledls1, ledls2, ledls3, ledls4 to apng respectively, as shows in figure3. figure 3: led threshold setting the following equation shows how the external resistor shifts the led thresholds. the range of led1 \ led4 indicator threshold shift from 5.5v \ 8.8v. vled example is given by the below table: led hysteresis window setting the adjustable led voltage thresholds are set for hz mode. in charge mode, the measured battery voltage is higher than in hz mode, while in discharge mode, the measured battery voltage is lower. to have relatively better fuel gauge for battery, a programmable hysteresis window will help. when the battery voltage goes up (in charge mode), the thresholds become higher, when the battery voltage goes down, lower thresholds are applied. ACT2804 provide hyst pin to set hysteresis window for each indication level as shows in figure r lsx (k ) v ledx (v) 40 8.2 43.2 8 47 7.798 49.1 7.7 57 7.395 60 7.3 67.5 7.1 r lsx (k ) v ledx (v) 72 7 90 6.7 108 6.5 120 6.4 135 6.3 180 6.1 270 5.9 i c (a) r icst units r cs =25m ? r cs =50m ? 0.8 10 5 k ? 0.9 8.89 4.44 k ? 1.0 8 4 k ? 1.1 7.27 3.64 k ? 1.2 6.67 3.33 k ? 1.3 6.15 3.08 k ? 1.4 5.71 2.86 k ? 1.5 5.33 2.67 k ? act 2804 vin input vout rcs 25 m sw l cin cout 1 battery 1 output io iin bat battery 2 cbd r cbd 47 icst r icst ) 1 ( ) ( * ) ( * 5 1000 ) ( cs ? ? ? k r m r a ic icst ) 2 ( 20 ? ? ? k r i v icst discharge icst act 2804 rim c hys t r hy st ledls 1 ledls 2 ledls 3 ledls 4 r imc r ls 1 r ls 2 r ls 3 r ls 4 ) 3 ( ) ( r k 108 5 . 5 lsx ) ( ? ? ? ? k v v v ledx rev 2, feb - 04 - 2016 innovative power tm - 12 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 applications informa tion hyst pin is regulated at 1v. its input current will determine hysteresis adjustment equally to all level. connect hyst to apgn via a resistor to set hysteresis window. beside the hysteresis window, to avoid comparison oscillation, fixed 100mv of hysteresis is added to each level comparator. hysteresis window is given by below equation: then rhyst example is given by the below table: battery impedance compensation to avoid the number of leds changes between charge and discharge modes. internal impedance compensation circuit is built in. an external resistor is used to set the impedance from 100m to 800m . rimc is corresponding to battery impedance. the led1 - 4 thresholds shifted up and down based on the product of charge/discharge current and set impedance. rimc value is given by below equation. in case not using compensation, float rimc then there is no compensation affects to trig - points. rimc example is given by the below table: battery temperature monitering the ACT2804 monitors the battery pack temperature by measuring th voltage at the th pin as shows in figure 4. the th pin is connected to the thermistor resistor net which includes a negative - temperature coefficient thermistor. an internal current source provides a bias current to generate th voltage. the ACT2804 compares the voltage at the th pin with the internal v thh and v thl thresholds to determine if charging or discharging is allowed. when v th rev 2, feb - 04 - 2016 innovative power tm - 13 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 applications informa tion figure 5: led indication in discharge mode, when battery voltage goes below led1 threshold, led1 starts flashing until buck (discharge mode) turns off due to either light load or buck uvlo. the flash frequencies for all the leds are 0.5hz with 1s on and 1s off. in hz mode, when pb is pressed for 40ms, buck turns on. if vbat rev 2, feb - 04 - 2016 innovative power tm - 15 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 table 5: bom list item reference description qty manufacturer 1 c1 ceramic capacitor, 4.7uf/10v, x7r, 0805 1 murata/tdk 2 c2,c3,c4,c5,c8, c9,c11 ceramic capacitor, 22uf/16v, x7r, 1206 7 murata/tdk 3 c6,c10 ceramic capacitor, 0.1uf/16v, x7r, 0603 2 murata/tdk 4 c7 ceramic capacitor, 47nf/10v, x7r, 0603 1 murata/tdk 5 c12 ceramic capacitor, 2.2nf/16v, x7r, 0603 1 murata/tdk 6 c13 ceramic capacitor, 1uf/10v, x7r, 0603 1 murata/tdk 7 c14 ceramic capacitor, 100nf/16v, x7r, 0603 1 murata/tdk c15 ceramic capacitor, 2.2uf/10v, x7r, 0603 1 murata/tdk 9 c16,c17 ceramic capacitor, 3.3uf/10v, x7r, 0603 2 murata/tdk 10 d1 mbr1020vl, 20v, 1a schottky, optional 1 panjit 11 l1 core swpa8040s4r7nt 4.7uh 5.9a 1 sunlord 12 led1,led2, led3,led4 led, 0603, blue 4 led manu 13 r1 chip resistor, 2.7 , 1/8w, 1%, 0805 1 murata/tdk 14 r2,r2a,r3,r3a,r4,r4a chip resistor, 50m , 1/2w, 1%, 1206 6 sart 15 r5 chip resistor, 8k , 1/10w, 1%, 0603 1 murata/tdk 16 r6 chip resistor, 83k , 1/10w, 1%, 0603 1 murata/tdk 17 r7 chip resistor, 63.5k , 1/10w, 1%, 0603 1 murata/tdk 18 r8 chip resistor, 51.4k , 1/10w, 1%, 0603 1 murata/tdk 19 r9 chip resistor, 41.5k , 1/10w, 1%, 0603 1 murata/tdk 20 r10 chip resistor, 12k , 1/10w, 5%, 0603 1 murata/tdk 21 r11,r12 chip resistor, 540k , 1/10w, 1%, 0603 2 murata/tdk 22 r13 chip resistor, 0.47 , 1/8w, 5%, 0805 1 murata/tdk 23 r14,r16 chip resistor, 510 , 1/10w, 1%, 0603 2 murata/tdk 24 r15 chip resistor, 47 , 1/4w, 5%, 1206 1 murata/tdk 25 r17 chip resistor, 3k, 1/10w, 1%, 0603 1 murata/tdk 26 r18 chip resistor, 32k, 1/10w, 1%, 0603 1 murata/tdk 27 r19 chip resistor, 10 , 1/10w, 1%, 0603 1 murata/tdk 28 r20 chip resistor, 200 , 1/10w, 5%, 0603, optional 1 murata/tdk 29 r21 chip resistor, 100 , 1/10w, 5%, 0603 1 murata/tdk 30 r22, r23 chip resistor, 715k , 1/10w, 5%, 0603 2 murata/tdk 31 r ntc 103at ntc thermistor, nxrt15xh103v 1 murata 32 q1 8205a, rdson < 25m at vgs = 4.5 v, optional 1 ty 33 pb push button switch 1 nikkai omron 34 usb 10.2*14.6*7mm, 4p 2 35 micro - usb micro usb 5p/f smtb 1 36 u1 ic, ACT2804, qfn 55 - 40 1 active - semi rev 2, feb - 04 - 2016 innovative power tm - 16 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 typical performance characteristics cont d (schematic as show in figure 6, ta = 25c, unless otherwise specified) ACT2804 - 001 input current (ma) 3500 3000 2500 2000 1500 1000 500 0 test point 0 5 10 15 20 25 30 ACT2804 - 002 charge current (ma) 1200 1000 800 600 400 200 0 vbat (v) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 ACT2804 - 003 charge efficiency efficiency(%) 96.0 95.0 94.0 93.0 92.0 91.0 90.0 vbat (v) 5.5 6.0 6.5 7.0 7.5 8.0 8.5 ACT2804 - 005 battery charge current vs. junction temperature battery charge current (ma) 1400 1200 1000 800 600 400 200 0 temperature (c) - 20 0 20 40 60 80 100 120 140 ACT2804 - 004 discharge efficiency efficiency(%) 100.0 95.0 90.0 85.0 80.0 75.0 output current (ma) 0 500 1000 1500 2000 2500 3000 3500 4000 charge current ACT2804 - 006 battery leakage ( a) 25.0 20.0 15.0 10.0 5.0 0 temperature (c) - 20 0 20 40 60 80 100 120 battery leakage vs. junction temperature (hz mode) v bat = 8.2v v bat = 7.0v v in = 5.0v v in = 5.0v i chrg = 1.0a v in = 5.0v i chrg = 1a v in = 5.0v v bat = 7.5v battery charge v/i profile charge current vs. output current v bat = 7.5v v bat = 8.4v v bat = 6.0v input current output current rev 2, feb - 04 - 2016 innovative power tm - 17 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 typical performance characteristics cont d (schematic as show in figure 6, ta = 25c, unless otherwise specified) ACT2804 - 008 buck output1 constant current limit vs. temperature buck output2 constant current (ma) 2750 2700 2650 2600 2550 2500 2450 temperature (c) - 30 0 30 60 90 120 150 v bat = 8.4v cv= 4.0v rcs=25m (1%) ACT2804 - 007 buck output2 constant current limit vs. temperature buck output1 constant current (ma) 1300 1250 1200 1150 1100 1050 1000 v bat = 8.4v cv= 4.0v rcs=25m (1%) buck output2 voltage vs. output current ACT2804 - 0010 buck output2 voltage (v) 5.25 5.20 5.15 5.10 5.05 5.00 4.95 buck output2 current (ma) 0 500 1000 1500 2000 2500 3000 v bat =8.4v v bat =6.0v buck output1 voltage vs. output current ACT2804 - 009 buck output1 voltage (v) buck output1 current (ma) 0 200 400 600 800 1000 1200 1400 v bat =8.4v v bat =6.0v temperature (c) - 30 0 30 60 90 120 150 buck output1 constant current limit vs. v bat buck output1 constant current (ma) 1240 1230 1210 1200 1190 1180 ACT2804 - 012 buck output2 constant current limit vs. v bat buck output2 constant current (ma) 2720 2700 2680 2660 2640 2620 2600 vbat (v) 5.8 6.2 6.6 7.0 7.4 7.8 8.2 8.6 ACT2804 - 011 vbat (v) 5.8 6.2 6.6 7.0 7.4 7.8 8.2 8.6 5.25 5.20 5.15 5.10 5.05 5.00 4.95 rev 2, feb - 04 - 2016 innovative power tm - 18 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 typical performance characteristics cont d (schematic as show in figure 6, ta = 25c, unless otherwise specified) ACT2804 - 013 buck standby current vs. battery voltage standby current ( m a) 1.2 1.1 1.0 0.9 0.8 0.7 0.6 ACT2804 - 014 battery leakage ( a) 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 battery voltage(v) 0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 battery leakage vs. battery voltage (hz mode) battery voltage (v) 5.8 6.2 6.6 7.0 7.4 7.8 8.2 8.6 ACT2804 - 016 buck output2 cc/cv buck output2 voltage (v) 6.0 5.0 4.0 3.0 2.0 1.0 0 output2 current (ma) 0 500 1000 1500 2000 2500 3000 ACT2804 - 015 buck output1 cc/cv buck output1 voltage (v) 6.0 5.0 4.0 3.0 2.0 1.0 0 output1 current (ma) 0 200 400 600 800 1000 1200 v bat = 8.2v v bat = 6.0v v bat = 6.0v v bat = 8.2v buck load transient (iout2: 80ma - 1a - 80ma, iout1: 0a) ch1 ch2 v bat = 8.2v v out = 5.0v buck load transient (iout2:1a - 2.4a - 1a, iout1: 0a) ACT2804 - 018 ch1 ch2 ACT2804 - 017 ch1: v out , 200mv/div ch2: i out , 500ma/div time: 1ms/div v bat = 8.2v v out = 5.0v ch1: v out , 200mv/div ch2: i out , 1a/div time: 1ms/div rev 2, feb - 04 - 2016 innovative power tm - 19 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 typical performance characteristics cont d (schematic as show in figure 6, ta = 25c, unless otherwise specified) ch1 ch2 v bat = 8.2v v out = 5.0v ACT2804 - 020 ch1 ch2 ACT2804 - 019 buck load transient (iout2: 80ma - 1a - 80ma, iout1: 1a) buck load transient (iout2:1a - 2.4a - 1a, iout1: 1a) v bat = 8.2v v out = 5.0v ch1: v out , 200mv/div ch2: i out , 1a/div time: 1ms/div ch1: v out , 200mv/div ch2: i out , 500ma/div time: 1ms/div rev 2, feb - 04 - 2016 innovative power tm - 20 - www.active - semi.com copyright ? 2016 active - semi, inc. ACT2804 qfn55 - 40 pack age outline and dimensions active - semi, inc. reserves the right to modify the circuitry or specifications without notice. users should evaluate each product to make sure that it is suitable for their applications. active - semi products are not intended or authorized for use as critical components in life - support devices or systems. active - semi, inc. does not assume any liability arising out of the use of any product or circuit described in this datasheet, nor does it convey any patent license. active - semi and its logo are trademarks of active - semi, inc. for more information on this and other products, contact sales@active - semi.com or visit http://www.active - semi.com . is a registered trademark of active - semi. symbol dimension in mil l imeters dimension in inches min max min max a 0. 7 00 0.800 0.028 0.031 a1 0.000 0.050 0.000 0.002 a3 0.20 3 ref 0.008 ref b 0.1 5 0 0. 25 0 0.00 6 0.01 0 d 4.924 5.076 0.194 0.200 e 4.924 5.076 0.194 0.200 d1 3.300 3.500 0.130 0.138 e1 3.300 3.500 0.130 0.138 e 0. 4 00 typ 0.0 16 typ l 0.3 24 0. 476 0.01 3 0.0 19 k 0.200 min 0.008 min package outline d e p i n # 1 d o t b y m a r k i n g a 3 a a 1 t o p v i e w d / 2 e / 2 e 1 d 1 b e l b o t t o m v i e w k |
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