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ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 1 d escription this protection ic was developed for use with lithium - ion/lithium polymer 1 - cell serial batteries. it detects overcharge, overdischarge, discharge overcurrent and other abnormalities, and functions to protect the battery by turning off the ex ternal mosfet. the ic also has a built - in timer circuit (for detection delay times), so fewer external parts can be used in protection circuit configuration. features 1 . high - accuracy voltage detection circuit ? overcharge detection voltage 4.200 to 4.400 v accuracy: 50 mv ? overcharge release voltage 3.900 to 4.400v accuracy: 50mv ? overdischarge detection voltage 2.30 to 3.00v accuracy: 100mv ? overdischarge release voltage 2.30 to 3.40v accuracy: 100mv ? discharge overcurrent detection voltage 150mv accuracy: 100mv ? short - circuiting detection voltage 1.35v accuracy: 100mv 2 . delay times are generated by an internal circuit (external capacitors are unnecessary). ? overcharge delay time 100ms typ. ? overdischarge delay time 50ms typ. ? discharge overcurrent delay ti me 10ms typ. ? charge overcurrent detection voltage 10ms typ. ? short circuit delay time 5s typ. 3 . power - down function yes / no are selectable (see model list). 4 . auto overdischarge recovery function yes / no a re selectable (see model list). 5 . low cu rrent consumption ? operation mode 3.0a typ., 6.0a max. (vcc=3.9v) ? power - down mode 0.1a max. (vcc=2.0v) ? auto overdischarge mode 2.0a max. (vcc=2.0v) 6. 0 v battery charge function available / unavailable are selectable (see model list). 7. operation te mperature range - 40 ~+85
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 2 block diagram packaging type sot - 23 - 6 6 5 4 1 2 3 sot - 23 - 6 symbol direction function 1 od o mosfet gate connection pin for discharge control 2 cs i input pin for current sense, charger detect 3 oc o mosfe gate connection pin for charge control 4 td i test pin for reduce delay time 5 vcc - power supply, throug h a resistor (r1) 6 gnd - ground pin
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 3 order ing information ace dw01 xx + h model list over charge detection voltage over charge release voltage over discharge detection voltage over discharge release vo ltage ov battery charge function other function vocp vocr vodp vodr v0v - 4.30v 4.10v 2.40v 3.00v a vailable auto overdischarge recovery function function normal status this ic monitors the voltage of the battery connected between the vcc pin and gnd p in and the voltage difference between the cs pin and gnd pin to control charging and discharging. when the battery voltage is in the range from overdischarge detection voltage (vodp) to overcharge detection voltage (vocp), and the cs pin voltage is in the range from the charger detection voltage (vch) to discharge overcurrent detection voltage (voi1), the ic turns both the charging and discharging control mosfet on. this condition is called the normal status. under this condition, charging and discharging c an both be carried out freely. caution: discharging may not be enacted when the battery is first time connected. to regain normal status, cs and gnd pin must be shorted or the charger must be connected. overcharge protection when the voltage of the batter y cell exceeds the overcharge protection voltage (vocp) beyond the overcharge delay time (toc) period, charging is inhibited by turning off of the charge control mosfet. the overcharge condition is released in two cases: 1. the voltage of the battery cell bec omes lower than the overcharge release voltage (vocr) through self - discharge. 2. the voltage of the battery cell falls below the overcharge protection voltage (vocp) and a load is connected. when the battery voltage is above vocp, the overcharge condition wil l not release even a load is connected to the pack. halogen - free gm : sot - 23 - 6 pb - free
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 4 overdischarge status 1. products with power - down function when the battery voltage falls below than the overdischarge detection voltage (vodr) during discharging in the normal status and the detection c ontinues longer than the overdischarge detection delay time (tod), the a cedw01 series will turn the discharging control mosfet off(od pin) so as to stop discharging. this condition is called the overdischarge status. when the mosfet is off, cs pin voltage i s pulled up by the resistor to vcc in the ic, at this time; the power consumption is reduced to the lowest. this condition is called the sleep mode . the overdischarge status will be released by two cases: a. when cs pin voltage is equal to or lower than the charge overcurrent detection voltage (vcip) by charging and the vcc pin voltage is higher than the overdischarge detection voltage (vodr). b. when cs pin voltage is equal to or higher than the charge overcurrent detection voltage (vcip) by charging and the v cc pin voltage is higher than the overdischarge release voltage (vodr). 2. products with auto overdischarge recovery function when the battery voltage falls below than the overdischarge detection voltage (vodp) during discharging in the normal status and the detection continues longer than the overdischarge detection delay time (tod), the ACEDW01 series will turn the discharging control mosfet off(od pin) so as to stop discharging. this condition is called the overdischarge status. the overdischarge status wil l be released by three cases: a. when cs pin voltage is equal to or lower than the charge overcurrent detection voltage (vcip) by charging and the vcc pin voltage is higher than the overdischarge detection voltage (vodp). b. when cs pin voltage is equal to or hi gher than the charge overcurrent detection voltage (vcip) by charging and the vcc pin voltage is higher than the overdischarge release voltage (vodr). c. without connecting a charger, if the vcc pin voltage is higher than overdischarge release voltage (vodr), the overdischarge status will be released, namely auto overdischarge recovery function. overcurrent protection in normal mode, the ACEDW01 continuously monitors the discharge current by sensing the voltage of cs pin. if the voltage of cs pin exceeds the o vercurrent protection voltage (voi1) beyond the overcurrent delay time (toi1) period, the overcurrent protection circuit operates and discharging is inhibited by turning off the discharge control mosfet. the overcurrent condition returns to the normal mode when the load is released or the impedance between batt+ and batt C is larger than 500k . the ACEDW01 provides two overcurrent detection levels (0.15v and 1.35v) with two overcurrent delay time (toi1 and toi2) corresponding to each overcurrent diction leve l . charge detection after overdischarge when overdischarge occurs, the discharge control mosfet turns off and discharging is inhibited. however, charging is still permitted through the parasitic diode of mosfet. once the charger is connected to the batter y pack, the ACEDW01 immediately turns on all the timing generation and detection circuitry. charging progress is sensed if the voltage between cs and gnd is below charge detection threshold voltage (vch).
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 5 charge overcurrent status when a battery is in the normal status, the voltage of the cs pin is lower than the charge overcurrent detection voltage (vcip). when the charge current is higher than the specified value and the status lasts beyond the charge overcurrent detection delay time (tcip), the charge c ontrol mosfet will be turned off and charging is stopped. this status is called the charge overcurrent status. this ic will be restored to the normal status from the charge overcurrent status when the voltage at the cs pin returns to charge overcurrent det ection voltage (vcip) or higher by removing the charger. 0v battery charging function this function is used to recharge a connected battery which voltage is 0v due to self - discharge. when the 0v battery charge starting charger voltage (v0v) or a higher voltage is applied between the battery+ (batt+) and battery - (batt - ) pins by connecting a charger, the charging control mosfet gate is fixed to the vcc pin voltage. when the voltage between the gate and the source of the charging control mosfet b ecomes equal to or higher than the turn on voltage due to the charger voltage, the charging control mosfet is turned on to initiate charging. at this time, the discharging control mosfet is off and the charging current flows through the internal parasitic diode in the discharging control mosfet. when the battery voltage becomes equal to or higher than overdischarge detection voltage (vodp), the ACEDW01 series will enter into the normal status. caution a. some battery providers do not recommend charging for a c ompletely self - discharged battery. please ask the battery provider to determine whether to enable or prohibit the 0v battery charging function. b. the 0v battery charge function has higher priority than the charge overcurrent detection function. consequently, a product in which use of the 0v battery charging function is enabled to forcibly charge a battery and the charge current cannot be detected when the battery voltage is lower than overdischarge detection voltage (vodp). 0v battery charging function when a battery that is internally short - circuited (0v battery) is connected, the unavailable 0v charging function will prohibit recharging. when the battery voltage equals to the 0v battery charge inhibition battery voltage (v0in) or lower, the ch arging control mosfet gate is fixed to the batt - pin voltage to prohibit charging. when the battery voltage equals to the 0v battery charge inhibition battery voltage (v0in) or higher, charging can be implemented. caution a. some battery providers do not recommend charging for a completely self - discharged battery. please ask the battery provider to determine whether to enable or prohibit the 0v battery charging function.
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 6 selection of external control mosfet because the overcurrent protection voltag e is preset, the threshold current for overcurrent detection is determined by the turn - on resistance of the charge and discharge control mosfets. the turn - on resistance of the external control mosfets can be determined by the equation: ron=voi1/(2*it) (it is the overcurrent threshold current). for example, if the overcurrent threshold current it is designed to be 3a, the turn - on resistance of the external control mosfet must be 25m . be aware that turn - on resistance of the mosfet changes with temperature va riation due to heal dissipation. it changes with the voltage between gate and source as well. (turn - on resistance of mosfet increases as the voltage between gate and source decreases). as the turn - on resistance of the external mosfet changes, the design of the overcurrent threshold current changes accordingly. suppressing the ripple and disturbance form charger to suppress the ripple and disturbance from charger, connection r1 and c1 to vcc is recommended. protection the cs pin r2 is used for latch - up pro tection when charger is connected under overdischarge condition and overstress protection at reverse connection of a charger.
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 7 timing diagram overcharge condition ? load discharging ? normal condition
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 8 overdischarge condition ? charging by a charger ? normal condition
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 9 over current condition ? normal condition
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 10 absolute maximum ratings ( gnd=0v, temperat ure=25 un less otherwise specified ) item symbol rating unit input voltage between vcc and gnd vcc gnd - 0.3 to gnd+10 v oc output pin voltage voc vcc - 14 to vcc+0.3 v od output pin voltage vod gnd - 0.3 to vcc+0.3 v cs input pin voltage vcs vcc - 14 to vcc+0. 3 v operating temperature range top - 40 to +85 storage temperature range tst - 40 to +125 electrical characteristics parameter test conditions symbol min typ max unit supply current vcc=3.9v icc 3 6.0 ua power - down current vcc=2.0v ipd 0.1 0.6 u a auto overdischarge recovery current vcc=2.0v iod 2.0 3.0 ua overcharge protection voltage 4.2~4.4v a djustable vocp vocp - 0.05 vocp vocp +0.05 v overcharge hysteresis voltage 3.9~4.4v a djustable vocr vocr - 0.05 vocr vocr +0.05 v overdischarge protection voltage 2.3~3.0v a djustable vodp vodp - 0.1 vodp vodp +0.1 v overdischarge release voltage 2.3~3.4v a djustable vodr vodr - 0.1 vodr vodr +0.1 v overcurrent protection voltage voi1 120 150 180 mv short current protection voltage vcc=3.6v voi2 1.05 1.35 1.65 v overcharge delay time toc 100 200 ms overdischarge delay time vcc=3.6v to 2.0v tod 50 100 ms overcurrent delay time(1) vcc=3.6v toi1 10 20 ms overcurrent delay time(2) vcc=3.6v toi2 5 50 us
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 11 charge overcurrent delay time vcc=3.6v , cs= - 1.2v tcip 10 20 ms load detection threshold voltage vld 0.15 0.18 v charger detection threshold voltage vch - 1.2 - 0.7 - 0.2 v charge overcurrent detection voltage vcip - 1.2 - 0.7 - 0.2 v od pin output h voltage vodh vcc - 0.1 vcc - 0. 02 v od pin output l voltage vodl 0.1 0.5 v oc pin output h voltage voch vcc - 0.1 vcc - 0. 02 v oc pin output l voltage vocl 0.1 0.5 v 0v battery charge starting charger voltage 0v battery charging function available vov 1.2 v 0v battery charge inhibition ch arger voltage 0v battery charging function unavailable v0in 0.5 v
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 12 typical application circuit ACEDW01 symbol device name purpose min typ max remark r1 resistor limit current, sta bilize vcc and strengthen esd protection 100 100 100 1k 1k 1k note: 1. r1 should be as smal l as possible to avoid lowering the overcharge detection accuracy due to current consumption. when a charger is connected in reversed, the current flows from the charger to the ic. at this time, if r1 is connected to high resistance, the voltage between vc c pin and vss pin may exceed the absolute maximum rating. 2. if r2 has a resistance higher than 2k , the charging current may not be cut when a high - voltage charger is connected. please select as large a resistance as possible to prevent current when a charger is connected in reversed. 3. c1 will stabilize the supply voltage of vcc the value of c1 should be equal to or more than 0.01f. 4. if a nmosfet with a threshold voltage equal to or higher than the overdischarge detection voltage is applied, discharging may be stopped before overdischarge is detected. 5. if the withstanding voltage between the gate and sou rce is lower than the charger voltage, the fet may be destroyed.
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 13 characteristics
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 14
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 15
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 16
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 17
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 18 packing information sot - 23 - 6 symbol min typ max a 1.02 - 1.35 a1 0.05 - 0.15 a2 1.00 1.10 1.20 b 0.40 - 0.55 b2 0.25 - 0.40 c 0.08 - 0.20 d 2.70 2.90 3.00 e 2.60 2.80 3.00 e1 1.50 1.60 1.70 l 0.35 0.45 0.55 l1 0.60 ref e 0.95 bsc e1 1.90 bsc 1 2
ace dw01 one cell lithium - ion/polymer battery protection ic ver 1. 2 1 9 notes ace does not assume any responsibility for use as critical components in li fe 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 intended for surgical implant into th e 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 user. 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., ltd. http://www.ace - ele.com/

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