preliminary rt9543 ds9543-00 august 2001 www.richtek-ic.com.tw 1 li-ion battery protector general description the rt9543 series are protection ics for over- charge/discharge of rechargeable one-cell lithium-ion (li+) batteries by cmos process. the rt9543 series can detect over-charge/discharge of li+ one-cell and excess load current and charge current, further include a short circuit protector for preventing large external short circuit current. each of these ics is composed of four voltage detectors, a reference unit, a hysteresis circuit, and a bidirectional short circuit protector. package of sot- 26 is available. ordering information rt9543 ? ? ? ? typical application circuit features z sustaining to 24v charger voltage z low supply current ? supply current: typ. 2.0 a ? standby current (after detecting over- discharge): less than 0.2 a z high accuracy detector threshold ? over-charge detector: 50mv ? over-discharge detector: 2.5% z built-in protection circuit ? excess current trip/short circuit protector in discharging path z output delay of over-charge adjustable with an external capacitor: 75ms at 0.01 f z ultra small package: sot26 applications z over-charge / over-discharge protection for li+ one-cell pack z high precision protectors for cellular phones or instruments using li+ one-cell battery pin configurations part number pin configurations rt9543 ? ce (plastic sot-26) top view 1. cout 2. ct 3. vss 4. dout 5. vdd 6. v- rt9543 ? cer (plastic sot-26) top view 1. dout 2. v- 3. cout 4. ct 5. vdd 6. vss 64 3 2 1 5 64 3 2 1 5 operating temperature range c: commercial standard package type e : sot-26 type i er : sot-26 t y pe ii see table 1 rt9543 vdd ct vss dout cout v- + r1 100 ? c1 0. 1 f c3 0. 01 f c2 0. 1 f r2 100 ?
rt9543 preliminary www.richtek-ic.com.tw ds9543-00 august 2001 2 package information dimensions in millimeters dimensions in inches symbol min max min max a 0.889 1.295 0.035 0.051 a1 -- 0.152 -- 0.006 b 1.397 1.803 0.055 0.071 b 0.356 0.559 0.014 0.022 c 2.591 2.997 0.102 0.118 d 2.692 3.099 0.106 0.122 e 0.838 1.041 0.033 0.041 h 0.102 0.254 0.004 0.010 l 0.356 0.610 0.014 0.024 b b c d l h a1 e a
preliminary rt9543 ds9543-00 august 2001 www.richtek-ic.com.tw 3
rt9543 preliminary www.richtek-ic.com.tw ds9543-00 august 2001 4 richtek technology corp. headquarter 6f, no. 35, hsintai road, chupei city hsinchu, taiwan, r.o.c. tel: (8863)5510047 fax: (8863)5537749 richtek technology corp. taipei office (marketing) 8f-1, no. 137, lane 235, paochiao road, hsintien city taipei county, taiwan, r.o.c. tel: (8862)89191466 fax: (8862)89191465 email: marketing@richtek-ic.com.tw
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