tm TE CH T63H0001A Li-Ion Battery Protector T63H0001A Features Low supply current Supply current TYP. 5.0uA Standby current (after detecting over-discharge) TYP. 0.3uA High withstand voltage Absolute maximum ratings 20V(VDD-VM) High accuracy detector Over-charge detector +/- 25mV Over-discharge detector +/- 2.5% Over-charge detector threshold 4.0V to 4.4V Over-discharge detector threshold 2.4V to 3.0V Threshold Variety of detector threshold Built in protection circuit Excess current trip/Short circuit protector Output delay of over charge Time delay at C3=0.01uF & VDD=4.3V 170Msnote1 note1: The result was measured from T63H0001A-AX. Part Number Examples Over charge detection Over charge release voltage voltage T63H0001A-AX 4.25V T63H0001A-BX Part No. marking Pack type 4.05V 001A SOT-23-6 4.35V 4.15V 001B SOT-23-6 T63H0001A-CX 4.30V 4.10V 001C SOT-23-6 …*note1 …. …. …. note1: New model version and specific characteristics may be order by customer. General Description The T63H0001A series are protection ICs for over-charge/discharge of rechargeable one-cell Lithium-ion (Li+) batteries by CMOS process. The T63H0001A series can detect over-charge/discharge of Li+ one-cell and excess load current, further include a short circuit protector for preventing large external short circuit current. Each of these ICs is composed of three voltage detectors, a reference unit, a hysteresis circuit, and a short circuit protector. When charging voltage crosses the detector threshold from a low value to a value higher than Vdet1, the output of Cout pin, the output of over-charge detector/VD1, switches to low level. … charger’s negative pin level. After detecting over-charge the VD1 can be reset and the output of Cout pin becomes “H” when the VDD voltage is coming down to a level lower than “Vdet1-Vhys1”, or when a charger is disconnected from the battery pack while the TM Technology Inc. reserves the right P. 1 to change products or specifications without notice. Publication Date: MAR. 2004 Revision:A tm TE CH T63H0001A VDD level is in between “Vdet1” and “Vdet1-Vhys1” in the T63H0001A version. The output of Dout pin, the output of over-discharge detector/VD2, switches to “Low” after internally fixed delay time passed, when discharging voltage crosses the detector threshold from a high value to a value lower than Vdet2. An excess load current can be sensed and cut off after internally fixed delay time passed through the built in excess current detector, VD3, with Dout being enabled to low level. Once after detecting excess current, the VD3 is released and Dout level switches to “H” by detaching a battery pack from a load system. Further, short circuit protector makes Dout level to “L” immediately with external short circuit current and removing external short circuit leads Dout level to “H”. After detecting over-discharge, supply current will be kept extremely “L’ by halting some internal circuits operation. The output delay of over-charge detectors can be set by connecting external capacitors. Output type of Cout and Dout are CMOS. SOT-23-6 is available. Block Diagram 5 VDD 2 Ct Level Shift 1 Cout VD1 VD2 Over-discharge & Excess current & Short circuit detector controller 4 Dout VD3 6 VM 3 VSS Pin Configurations TM Technology Inc. reserves the right to change products or specifications without notice. P. 2 Publication Date:MAR. 2004 Revision:A tm TE CH T63H0001A Pin description Pin No. Symbol Pin description 1 Cout 2 Ct Pin for external capacitor setting output delay of VD1 3 Vss Ground 4 Dout Output of over-discharge detection, CMOS output 5 Vdd Power supply 6 VM Pin for charger negative input Output of over-charge detection, CMOS output ABSOLUTE MAXIMUM RATINGS Vss=0V Symbol Item Rating Unit Vdd Supply Voltage Vdd-VM -0.3 to 20 V VM Input Voltage VM pin Vdd-20 to Vss+0.3 V Ct pin Vss-0.3 to Vss+0.3 V Cout pin Vdd-20 to Vss+0.3 V Dout pin Vss-0.3 to Vss+0.3 V 150 mV Vct Vcout Output Voltage Vdout Pd Power Dissipation Topt Operating Temperature Range -40 to +85 ºC Tstg Storage Temperature Range -55 to +125 ºC Absolute Maximum ratings are threshold limit values that must not be exceeded even for an instant under any conditions. Moreover, such values for any two items must not be reached simultaneously. Operation above these absolute maximum ratings may cause degradation or permanent damage to the device. These are stress ratings only and do not necessarily imply functional operation below these limits. TM Technology Inc. reserves the right to change products or specifications without notice. P. 3 Publication Date:MAR. 2004 Revision:A tm TE CH T63H0001A Electrical Characteristic temp=25ºC Symbol Item Conditions Min. VDD1 Operating input voltage Voltage defined as Vdd-VM 2.4 Over-charge threshold voltage Detect rising edge of (Over charge detection voltage) supply voltage Vdet1 Over charge release Voch - Typ. Max. Unit 18 V -AX 4.20 4.25 4.30 V -BX 4.30 4.35 4.40 V -CX 4.25 4.30 4.35 V -AX 4.00 4.05 4.10 V -BX 4.10 4.15 4.20 V -CX 4.05 4.10 4.15 V voltage Vhys1 Over-charge threshold hysteresis range Vhys1=Vdet1-voch 0.15 0.20 0.25 V Tvdet1 Output delay time of over-charge C3=0.01uF, Vdd=3.6V ! 4.3V 140 170 210 ms Vdet2 Over-discharge threshold voltage 2.50 2.563 V Tvdet2 Output delay time of over-discharge Vdd=3.6V ! 2.4V 7 10 13 ms Vdet3 Excess current threshold voltage Detect rising edge of VM pin voltage 0.1 0.12 0.14 V Tvdet3 Output delay time of excess current Vdd=3V 9 13 17 ms Vshort Short detection voltage Vdd=3V Detect falling edge of supply voltage 2.437 Vdd-1. Vdd-0. Vdd-0. 1 Tshort Output delay time of short current Rshort Reset resistor for excess current protection Vdd=3V VDD=3.0V, VM=1.0V 50 V 8 5 5 50 us 100 150 Kohm 0.2 0.5 V Vol1 Nch ON voltage of Cout Iol=50uA, Vdd=4.4V Voh1 Pch ON voltage of Cout Ioh=-50uA, Vdd=3.9V Vol2 Nch ON voltage of Dout Iol=50uA, Vdd=2.4V Voh2 Pch ON voltage of Dout Ioh=-50uA, Vdd=3.9V Idd Supply current Vdd=3.9V, VM=0V 5.0 9.0 uA Istandby Standby current Vdd=2.0V 0.3 0.6 uA 3.4 0.2 3.4 V 3.8 V 0.5 V 3.7 Operation VD1/Over-Charge Detector The VD1 monitors VDD pin voltage. When the VDD voltage crosses over-charge detector threshold Vdet1 from a low value to a value higher than the Vdelt1, the VD1 can sense over-charging and an external charge control Nch-MOS-FET turns to “OFF” with Cout pin TM Technology Inc. reserves the right to change products or specifications without notice. being at “L”. An output delay time for over-charge detection can be set by an external capacitor C3 connecting the VSS pin and Ct pin. The external capacitor can make a delay time from a moment detecting over-charge to a time output a signal P. 4 Publication Date:MAR. 2004 Revision:A tm TE CH T63H0001A which enables charge control Nch-MOS-FET for turning to “OFF”. Though the VDD voltage would be going up to a higher level than Vdet1 if it is within a time period of the output delay time, VD1 would not be output a signal for turning “OFF” of charge control Nch-MOS-FET. A level shifter incorporated in a buffer driver for the Cout pin makes the “L” of Cout pin to the VM pin voltage and the “H” of Cout pin is set to VDD voltage with CMOS buffer. Reset conditions from overcharging There can be two cases to reset the VD1 making the Cout pin level to “H” again after detecting overcharge. Resetting the VD1 makes the charging system ready for resumption of charging process. The first case is in such condition that a time when the VDD voltage is coming down to a level lower than “Vdet1-Vhys1”. While in the second case, disconnecting a charger from the battery pack can make the VD1 resetting when the VDD level is within hysteresis width (Vdet1-Vhys1<=VDD<Vdet1) After detecting over-charge with the VDD voltage of higher than Vdet1, connecting system load to the battery pack makes load current allowable through parasitic diode of external charge control Nch-MOS-FET. The Cout level would be “H” when the VDD level is coming down to a level below the Vdet1 by continuous drawing of load current. VD2/Over-Discharge Detector The VD2 monitors a VDD pin voltage. When the VDD voltage crosses the over-discharge detector threshold Vdet2 from a high value to a value lower than the Vdet2, the VD2 can sense an over-discharging and the external discharge control Nch-MOS-FET turns to “OFF” with Dout pin being at “L”. Resetting the VD2 with the Dout pin level being “H” again after detecting over-discharge is only possible by connecting a charger to the battery VDD voltage is higher than Vdet2. An output delay time for the over-discharge detection is fixed internally. Through the VDD voltage would be going down to a lower level than Vdet2 if it is within a time period of the output delay time, VD2 would not output a signal for turning “OFF” of discharge control pack. When the VDD voltage stays under over-discharge detector threshold Vdet2 charge current can flow through parasitic diode of external control Nch-MOS-FET, then after the VDD voltages comes up to a value larger than Vdet2 discharging process would be advanced through “ON” state discharge control Nch-MOS-FET. Connecting a charger to the battery pack makes the Dout level being “H” instantaneously when the Nch-MOS-FET. After detection of an over-discharge by VD2, supply current would be reduced to 0.3uA TYP. At VDD=2V and into standby, only the charger detector is operating. The output type of Dout pin is CMOS having “H” level of VDD and “L” level of VSS. VD3/Excess Current Detector, Short Circuit Protector Both of the excess current detector and short circuit protector can work when both control TM Technology Inc. reserves the right to change products or specifications without notice. P. 5 Publication Date:MAR. 2004 Revision:A tm TE CH T63H0001A Nch-MOS-FET are in “ON” state. When VM pin voltage is going up to a value between the short protection voltage Vshort and excess current threshold Vdet3, the excess current detector operates and further soaring of VM pin voltage higher than Vshort makes the short circuit protector enabled. As a result the external discharge control Nch-MOS-FET turns to “OFF” with Dout pin being at “L”. An output delay time for the excess current detector is internally fixed, about 13ms TYP. At VDD=3V. A quick recovery of VM pin level from a value between Vshort and Vdet3 within the delay time keeps the discharge control FET staying “ON” state. When the short circuit protector is enabled, the Dout would be “L” and its delay time would be 5us TYP. The VM pin has a built-in pull down resistor, TYP. 100K Ohm, connected to the VSS pin. After an excess current or a short circuit protection is detected, removing a cause of excess current or external short circuit makes an external discharge control Nch-MOS-FET to an “ON” state automatically with the VM pin level being down to the VSS level through the built-in pull down resistor. When VDD voltage is higher than Vdet2 at a time when the excess current is detected the T63H0001A does not enter a standby mode, while VDD voltage is lower than Vdet2 the T63H0001A enters a standby mode. After detecting short circuit the T63H0001A will not enter a standby mode. Application Circuits R1=100Ohm 5 VDD C2 0.1uF 2 Ct T63H0001A 6 VM C3 0.01uf 3 VSS 4 Dout 1 Cout R2 1K C2 0.1uF TM Technology Inc. reserves the right to change products or specifications without notice. P. 6 Publication Date:MAR. 2004 Revision:A tm TE CH T63H0001A PACKAGE DIMENSION (Unit: mm) SOT-23-6 TAPING SPECIFICATION (Unit: mm) SOT-23-6 TM Technology Inc. reserves the right to change products or specifications without notice. P. 7 Publication Date:MAR. 2004 Revision:A