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| Ordering number : ENA1153 CMOS IC LV5124T Overview 2-Cell Lithium-Ion Secondary Battery Protection IC The LV5124T is a protection IC for 2-cell lithium-ion secondary batteries. Features Detects overcharge and over-discharge conditions and controls the charging and discharging operation of each cell. * High detection voltage accuracy: Over-charge detection accuracy 25mV Over-discharge detection accuracy 100mV * Hysteresis cancel function: The hysteresis of over-discharge detection voltage is made small by sensing the connection of a load after overcharging has been detected. * Discharge current monitoring function: Detects over-currents and load shorting, and an excessive discharge current is controlled. * Latch function after detecting over-current (Release is made by connecting the charger) * Low current consumption: Normal operation mode typ. 6.0A Stand by mode max. 0.2A * 0V cell charging function: Charging is enabled even when the cell voltage is 0V by giving a potential difference between the VDD pin and V- pin. * Monitoring function for each cell: Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. 52808 MS 20080312-S00003 No.A1153-1/8 LV5124T Specifications Absolute Maximum Ratings at Ta = 25C Parameter Power supply voltage Input voltage Charger minus voltage Output voltage Cout pin voltage Dout pin voltage Allowable power dissipation Operating ambient temperature Storage temperature Symbol VDD VVcout Vdout Pd max Topr Tstg Independent IC Conditions Ratings -0.3 to +12 VDD-28 to VDD+0.3 VDD-28 to VDD+0.3 VSS-0.3 to VDD+0.3 170 -30 to +85 -40 to +125 Unit V V V V mW C C Electrical Characteristics at Ta = 25C, unless especially specified. Parameter Operation input voltage 0V cell charging minimum operation voltage Over-charge detection voltage Over-charge release voltage Vd1 Vr1 V- Vd3 V- > Vd3 Over-charge detection delay time Over-charge release delay time Over-discharge detection voltage Over-discharge release hysteresis voltage Over-discharge detection delay time Over-discharge release delay time Over-current detection voltage Over-current release hysteresis voltage Over-current detection delay time Over-current release delay time Short circuit detection voltage Short circuit detection delay time Standby release voltage Internal resistance (connect to VDD) Internal resistance (connect to VSS) Cout Nch ON voltage Cout Pch ON voltage Dout Nch ON voltage Dout Pch ON voltage Vc input current Current consumption Standby current T-terminal input ON voltage td3 tr3 Vd4 td4 Vstb RDD RSS VOL1 VOH1 VOL2 VOH2 Ivc IDD Istb Vtest IOL=50A, VDD-Vc=4.4V, Vc-VSS=4.4V IOL=50A, VDD-Vc=3.9V, Vc-VSS=3.9V IOL=50A, VDD-Vc=Vd2(min), Vc-VSS=Vd2(min) IOL=50A, VDD-Vc=3.9V, Vc-VSS=3.9V VDD-Vc=3.5V, Vc-VSS=3.5V VDD-Vc=3.5V, Vc-VSS=3.5V VDD-Vc=2.2V, Vc-VSS=3.5V VDD-Vc=3.5V, Vc-VSS=3.5V VDDx0.4 VDDx0.5 VDD-0.5 0.0 6.0 1.0 13.0 0.2 VDDx0.6 V A A A V VDD-0.5 0.5 VDD-Vc=3.5V, Vc-VSS=3.5V VDD-Vc=3.5V, Vc-VSS=3.5V VDD-Vc=3.5V, Vc-VSS=3.5V VDD-Vc=3.5V, Vc-VSS=3.5V VDD-Vc=2.0V, Vc-VSS=2.0V (V-)-VSS 2.5 0.5 1.0 0.2 VDDx0.4 100 0.5 5.0 1.0 1.3 0.5 VDDx0.5 200 1.0 7.5 1.5 1.6 0.8 VDDx0.6 400 1.5 0.5 ms ms V ms V k M V V V td2 tr2 Vd3 Vh3 VDD-Vc=3.5V2.2V, Vc-VSS=3.5V VDD-Vc=2.2V3.5V, Vc-VSS=3.5V VDD-Vc=3.5V, Vc-VSS=3.5V VDD-Vc=3.5V, Vc-VSS=3.5V 50 0.5 0.18 5.0 100 1.0 0.20 10.0 150 1.5 0.22 20.0 ms ms V mV td1 tr1 Vd2 Vh2 VDD-Vc=3.5V4.5V, Vc-VSS=3.5V VDD-Vc=4.5V3.5V, Vc-VSS=3.5V 4.325 4.100 4.250 0.5 20.0 2.20 10.0 1.0 40.0 2.30 20.0 4.350 4.150 4.375 4.200 4.360 1.5 60.0 2.40 40.0 V V V s ms V mV Symbol Vcell Vmin Conditions Between VDD and VSS Between VDD-VSS =0 and VDD-VRatings min 1.5 typ max 10 1.5 Unit V V No.A1153-2/8 LV5124T Package Dimensions unit : mm (typ) 3245B 200 Pd max -- Ta Independent IC 3.0 8 Allowable power dissipation, Pd max -- mW 170 150 3.0 4.9 100 0.5 1 (0.53) 2 0.65 0.25 (0.85) 1.1MAX 68 50 0.125 0 -30 -20 0 20 40 60 80 100 Ambient temperature, Ta -- C 0.08 SANYO : MSOP8(150mil) Pin Assignment Dout 8 T 7 Vc Sense 6 5 2 VDD Cout 1 3 V- 4 VSS Top view Pin Functions Pin No. 1 2 3 4 5 6 7 8 VDD Cout VVSS Sense Vc T Dout Symbol VDD pin Overcharge detection output pin Charger minus voltage input pin VSS pin Sense pin Intermediate voltage input pin Pin to shorten detection time("H": Shortening mode, "L": Normal mode) Overdischarge detection output pin Description No.A1153-3/8 LV5124T Block Diagram Sence 5 VDD 1 + + td1,tr1 Delay conrol logic td2,tr2 2 Cout Vc 6 + + + - 8 Dout td3,tr3 + td4 4 VSS 3 V- 7 T No.A1153-4/8 LV5124T Functional Description Over-charge detection If either of the cell voltage is equal to or more than the over-charge detection voltage, stop further charging by turning "L" the Cout pin and turning off external Nch MOS FET after the over-charge detection delay time. This delay time is set by the internal counter. The over-charge detection comparator has the hysteresis function. Note that this hysteresis can be cancelled by connecting the load after detection of over-charge detection. and it becomes small to hysteresis peculiar to a comparator. Once over-charge detection is made, over-current detection is not made to prevent incorrect operations. Note that short-circuit can be detected. Over-charge release If both cell voltages become equal to or less than the over-charge release voltage (VM Vd3) when charger is connected, or if it become equal to or less than the over-charge release voltage (VM > Vd3) when load is connected, the Cout pin returns to "H" after the over-charge release delay time set by the internal counter. When load is connected and either cell or both cell voltages are equal to or more than the over-charge release voltage (VM > Vd3), the Cout pin does not return to "H". But the load current flows through the parasitic diode of external Nch MOS FET on Cout, consequently each cell voltage becomes equal to or less than over-charge release voltage (VM > Vd3), the Cout pin returns to "H" after the over-charge release delay time. Over-discharge detection When either cell voltage is equal to or less than over-discharge voltage, the IC stops further discharging by turning the Dout pin "L" and turning off external Nch MOS FET after the over-charge detection delay time. The IC goes into stand-by mode after detecting over-discharge and its consumption current is kept at about 0A. After over-discharge detection, the V- pin will be connected to VDD pin via internal resistor (typ 200k). Over-discharge release Release from over-discharge is made by only connecting charger. If the V- pin voltage becomes equal to or lower than the stand-by release voltage by connecting charger after detecting over-discharge, The IC is released from the stand-by state to start cell voltage monitoring. If both cell voltages become equal to or more than the over-discharge detection voltage by charging, the Dout pin returns to "H" after the over-discharge release delay time set by the internal counter. Over-current detection When excessive current flows through the battery, the V- pin voltage rises by the ON resister of external MOS FET and becomes equal to or more than the over-current detection voltage, the Dout pin turns to "L" after the over-current detection delay time and the external Nch MOS FET is turned off to prevent excessive current in the circuit. The detection delay time is set by the internal counter. After detection, the V- pin will be connected to VSS via internal resistor (typ 1M). It will not go into stand-by mode after detecting over-current. Short circuit detection If greater discharging current flows through the battery and the V- pin voltage becomes equal to or more than the short-circuit detection voltage, it will go into short-circuit detection state after the short circuit delay time shorter than the over-current detection delay time. When short-circuit is detected, just like the time of over-current detection, the Dout pin turns to "L" and external Nch MOS FET is turned off to prevent high current in the circuit. The V- pin will be connected to VSS after detection via internal resistor (typ 1M). It will not go into stand-by mode after detecting short circuit. Over-current/short-detection release After detecting over-current or short circuit, the internal resistor (typ.1M) between V- pin and VSS pin becomes effective. In this case, the V-pin voltage will be more than over-current detection voltage because of the relation between internal resister and the internal impedance of V- pin. Therefore, if the load resister is removed after detecting over-current or short circuit, the detection state will be kept. Release from over-current or short circuit is only made by connecting a charger to make the V- pins lower than over-current detection voltage and the Dout pin returns to "H after over-current release delay time set by the internal counter. No.A1153-5/8 LV5124T 0V cell charging operation If voltage between VDD and V becomes equal to or more than the 0V cell charging lowest operation voltage when the cell voltage is 0V, the Cout pin turns to "H" and charging is enabled. Shorten the test time By turning T pin to the VDD , the delay times set by the internal counter can be cut. If T pin is open, the delay times are normal. Delay time not set by the counter just like as short circuit detection delay cannot be controlled by this pin And we recommend that T pin is connected to Vss to prevent malfunction when excessive current flows in short circuit operation. Operation in case of detection overlap Overlap state During over-charge detection, Over-discharge detection is made, Operation in case of detection overlap Over-charge detection is prioritized. If overdischarge state continues even after overcharge detection, over-discharge detection is resumed. State after detection When over-charge state is made first, V- is released. When over-discharge is detected after over-charge state is made, the IC does not go into the stand-by mode. Note that V- is connected to VDD via 200k. Over-current detection is made, (*1) Both detections can be made in parallel. Over-charge detection continues even when the over-current state is made first. If the overcharge state is made first, over-current detection is interrupted. During over-discharge detection, Over-charge detection is made, Over-discharge detection is interrupted and over-charge detection is prioritized. When overdischarge state continues even after overcharge state is made, over-discharge detection is resumed. Over-current detection is made, (*3) Both detections can be made in parallel. Over-discharge detection continues even when the over-current state is made first. But overcurrent detection is interrupted when the overdischarge state is made first, (*4) If over-current state is made first, V- will be connected to VSS via 1M. If over-discharge detection is made next, V- also will be connected to VDD via 200k to get into standby mode. If over-discharge state is made first, Vwill be connected to VDD via 200k to get into During over-current detection, Over-charge detection is made, Over-discharge detection is made, (*1) (*3) stand-by mode. (*2) (*4) The IC does not go into the stand-by mode when over-discharge state is made after overcharge detection. Note that V- is connected to VDD via 200k. (*2) When over-current state is made first, V- is connected to VSS via 1M. When over-charge state is made first, V- is released. (Note) Short-circuit detection can be made independently. No.A1153-6/8 LV5124T Timing Chart [Cout Output System] Charger connection Hysteresis cancellation by load connection Load connection Charger connection Load connection Charger connection Vd1 Vr1 VDD Vd2 VDD Vd4 VVd3 VSS Vd5 Discharging via FETparasite Di VDD td1 VOver-charge detection state Over-charge detection state tr1 td1 tr1 Cout [Dout Output System] Load connection Charger connection Load connection Over-current occurrence Charger Load connection connection Load short-circuit occurrence Charger connection Load connection Vd1 Vr1 VDD Vd2 To standby VDD Vd4 VVd3 VSS Vd5 Charging via FETparasite Di To standby Charging via FETparasite Di VDD Dout VSS Over-discharge detection state Over-current detection state Short-circuit detection state Charge return td2 tr2 td3 tr3 td4 tr3 td2 Charge return VDD Cout V- No.A1153-7/8 LV5124T Application Circuit Example + R1 C1 R2 C2 VSS VDD Vc R4 Sense T C3 VSS VDout Cout R3 LV5124T - Components R1, R2 R3 R4 C1, C2, C3 Recommended value 100 2k 100 0.1 max 1k 4k 10k 1 unit F * These numbers don't mean to guarantee the characteristic of the IC. * In addition to the components in the upper diagram, it is necessary to insert a capacitor with enough capacity between VDD and VSS of the IC as near as possible to stabilize the power supply voltage to the IC. SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of SANYO Semiconductor Co.,Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO Semiconductor Co.,Ltd. product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of May, 2008. Specifications and information herein are subject to change without notice. PS No.A1153-8/8 |
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