RN5VM111C

Li-lon BATTERY PROTECTOR RN5VM1×× C/D SERIES APPLICATION MANUAL ELECTRONIC DEVICES DIVISION NO. EA-041-9803 NOTICE 1. The products and the product specifications described in this application manual are subject to change or discontinuation of production without notice for reasons such as improvement. Therefore, before deciding to use the products, please refer to Ricoh sales representatives for the latest information thereon. 2. This application manual may not be copied or otherwise reproduced in whole or in part without prior written consent of Ricoh. 3. Please be sure to take any necessary formalities under relevant laws or regulations before exporting or otherwise taking out of your country the products or the technical information described herein. 4. The technical information described in this application manual shows typical characteristics of and example application circuits for the products. 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June 1995 RN5VM1× × C/D Series APPLICATION MANUAL CONTENTS OUTLINE ......................................................................................................1 FEATURES ...................................................................................................1 APPLICATIONS .............................................................................................2 BLOCK DIAGRAMS .......................................................................................2 SELECTION GUIDE .......................................................................................2 PIN CONFIGURATION ...................................................................................3 PIN DESCRIPTION ........................................................................................3 ABSOLUTE MAXIMUM RATINGS ...................................................................4 ELECTRICAL CHARACTERISTIC ..................................................................5 TIMING DIAGRAM .........................................................................................9 OPERATION ................................................................................................11 TEST CIRCUIT ............................................................................................13 TYPICAL CHARACTERISTICS .....................................................................15 1) Over-charge Threshold VDET1 (V).....................................................................15 2) Over-discharge threshold VDET2 (V) ..................................................................15 3) Excess current threshold VDET3 (V)...................................................................15 4) Short circuit protector Threshold Vshort (V) .........................................................15 5) Output Delay of Over-charge tVDET1 (ms) ............................................................15 6) Output Delay of Over-discharge tVDET2 (ms) ........................................................15 7) Output Delay of Excess current tVDET3 (ms) .........................................................16 8) Output Delay of Short circuit Protector tshort (µs) ..................................................16 9) Over-charge Threshold Hysteresis VHYS1 (mV) .....................................................16 10) Supply Current IDD (µA) ................................................................................16 11) Standby Current Istandby (µA) ........................................................................16 12) COUT Nch Driver ON Voltage VOL1 (V) ...............................................................17 13) COUT Pch Driver ON Voltage VOH1 (V) ...............................................................17 ...............................................................17 15) DOUT Pch Driver ON Voltage VOH2 (V) ...............................................................17 16) Output Delay of Over-charge tVDET1 (ms) ............................................................18 17) Output Delay of Short protection tshort (µs) .........................................................18 18) Output Delay of Excess Current tVDET3 (ms) ........................................................18 19) Excess Current Threshold VDET3 (V) .................................................................18 20) Over-charge Threshold VDET1 (V).....................................................................18 TYPICAL APPLICATION ..............................................................................19 APPLICATION HINTS...................................................................................19 PACKAGE DIMENSION ................................................................................20 TAPING SPECIFICATION .............................................................................20 14) DOUT Nch Driver ON Voltage VOL2 (V) Li-lon BATTERY PROTECTOR RN5VM1×× C/D SERIES OUTLINE The RN5VM Series are protection ICs for over-charge/discharge of rechargeable one-cell Lithium-ion (Li+) batteries by CMOS process. The RN5VM 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 overcharge 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 VDD level is in between “VDET1” While in the RN5VM1××D version after detecting over-charge, any load current can not be drawn from the battery pack when the VDD voltage stays over “VDET1 - VHYS1”, excepting that the VD1 can be reset and it allows to draw load current when the VDD voltage is coming down to a level lower than “VDET1 - VHYS1” because of a cell internal discharging. The output of DOUT pin, the output of over-discharge detector/VD2, switches to “L” 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. SOT23-6 is available. and “VDET1 - VHYS1” in the RN5VM1××C version. FEATURES • Low supply current ................................Supply current • High withstand voltage..........................Absolute maximum ratings 28V (VDD–V-) • High accuracy detector threshold .......Over-charge detector Over-discharge detector ................Over-charge detector threshold • Variety of detector threshold Over-discharge detector threshold • Built-in protection circuit.......................Excess current trip/Short circuit protector • Output delay of over-charge .................Time delay at C3= 0.01µF and VDD=4.3V • Ultra small package ...............................SOT-23-6 TYP. 3.0µA Standby current (after detecting over-discharge) TYP. 0.3µA ±50mV ±2.5% 4.0V to 4.4V/step of 0.01V 2.0V to 3.0V/step of 0.05V 75ms for RN5VM111× 1 RN5VM1×× C/D APPLICATIONS • Over-charge/over-discharge protection for Li+ one-cell pack • High precision protectors for cell-phones and any other gadgets using on board Li+ one-cell battery BLOCK DIAGRAM 5 VDD 2 Ct – + VD1 Level Shift – + VD2 + VD3 – Delay Short Circuit Detector 3 VSS DOUT 4 COUT 1 V- 6 SELECTION GUIDE In the RN5VM1××× Series three of the input threshold for over-charge, over-discharge and excess current and taping type can be designating at the user’s request by Part Number as follows: RN5VM1××× –×× ←Part Number } } ↑ c ↑↑ ab Code Description a Serial Number for the RN5VM Series designating input threshold for over-charge, over-discharge and excess current detectors as well as hysteresis range for over-charge detector. Designation of version symbols b C : drawing load current is allowable after detecting over-charge. D : drawing load current is not allowable after detecting over-charge. c Designation of Taping Type: TR (refer to Taping Specification) 2 RN5VM1× × C/D PIN CONFIGURATION •SOT-23-6 6 5 4 (mark side) 1 2 3 PIN DESCRIPTION Pin No. Symbol Pin description 1 2 3 4 5 6 COUT Ct VSS DOUT VDD V- Output of over-charge detection, CMOS output Pin for external capacitor setting output delay of VD1 Ground Output of over-discharge detection, CMOS output Power supply Pin for charger negative input 3 RN5VM1×× C/D ABSOLUTE MAXIMUM RATINGS Symbol Item Rating Vss=0V Unit VDD V- Supply Voltage V- pin Input Voltage Ct pin COUT pin Output Voltage DOUT pin Power Dissipation Operating Temperature Range Storage Temperature Range –0.3 to 12 VDD–28 to VDD+0.3 Vss–0.3 to VDD+0.3 VDD–28 to VDD+0.3 Vss–0.3 to VDD+0.3 150 –40 to +85 –55 to +125 V V V V V mW ˚C ˚C Vct VCOUT VDOUT PD Topt Tstg ABSOLUTE MAXIMUM RATINGS 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. 4 RN5VM1× × C/D ELECTRICAL CHARACTERISTIC • RN5VM111C Symbol Item Conditions MIN. TYP. MAX. Topt=25˚C Unit VDD1 Vst VDET1 VHYS1 Operating input voltage Minimum operating voltage for 0V charging Over-charge threshold voltage Over-charge threshold hysteresis range Output delay time of over-charge Over-discharge threshold voltage Output delay time of over-discharge Excess current threshold voltage Output delay time of excess current Short detection voltage Output delay time of short detection Reset resistance for excess current protection Nch ON voltage of COUT Pch ON voltage of COUT Nch ON voltage of DOUT Pch ON voltage of DOUT Supply current Standby current Voltage defined as VDD–VSS Voltage defined as VDD–V-, VDD–Vss=0V Detect rising edge of supply voltage 1.5 10 1.2 V V V V ms V ms V ms V µs kΩ V V 4.20 0.15 4.25 0.2 75 2.50 10 0.20 13 4.30 0.25 100 2.563 13 0.23 17 tVDET1 VDET2 C3=0.01µF, VDD=3.6V→ 4.3V Detect falling edge of supply voltage VDD=3.6V→ 2.4V Detect rising edge of “V-” pin voltage VDD=3.0V VDD=3.0V VDD=3.0V VDD=3.6V, V-=1.0V IOL=50µA, VDD=4.4V IOH=–50µA, VDD=3.9V IOL=50µA, VDD=2.4V IOH=–50µA, VDD=3.9V VDD=3.9V, V-=0V VDD=2.0V 50 2.437 7 0.17 9 tVDET2 VDET3 tVDET3 Vshort VDD–1.1 VDD–0.8 VDD–0.5 5 50 100 0.2 3.4 3.8 0.2 3.4 3.7 3.0 0.3 6.0 0.6 0.5 50 150 0.5 tshort Rshort VOL1 VOH1 VOL2 VOH2 IDD Istandby V V µA µA *) Please refer to Test Circuit unless otherwise specified. 5 RN5VM1×× C/D • RN5VM112C Symbol Item Conditions MIN. TYP. MAX. Topt=25˚C Unit VDD1 Vst VDET1 VHYS1 Operating input voltage Minimum operating voltage for 0V charging Over-charge threshold voltage Over-charge threshold hysteresis range Output delay time of over-charge Over-discharge threshold voltage Output delay time of over-discharge Excess current threshold voltage Output delay time of excess current Short detection voltage Output delay time of short detection Reset resistance for excess current protection Nch ON voltage of COUT Pch ON voltage of COUT Nch ON voltage of DOUT Pch ON voltage of DOUT Supply current Standby current Voltage defined as VDD–VSS Voltage defined as VDD–V-, VDD–Vss=0V Detect rising edge of supply voltage 1.5 10 1.2 V V V V ms V ms V ms V µs kΩ V V 4.30 0.15 4.35 0.20 80 2.500 10 0.20 13 4.40 0.25 105 2.563 13 0.23 17 tVDET1 VDET2 C3=0.01µF, VDD=3.6V→ 4.4V Detect falling edge of supply voltage VDD=3.6V→ 2.4V Detect rising edge of “V-” pin voltage VDD=3.0V VDD=3.0V VDD=3.0V VDD=3.6V, V-=1.0V IOL=50µA, VDD=4.4V IOH=–50µA, VDD=3.9V IOL=50µA, VDD=2.4V IOH=–50µA, VDD=3.9V VDD=3.9V, V-=0V VDD=2.0V 55 2.437 7 0.17 9 tVDET2 VDET3 tVDET3 Vshort VDD–1.1 VDD–0.8 VDD–0.5 5 50 100 0.2 3.4 3.8 0.2 3.4 3.7 3.0 0.3 6.0 0.6 0.5 50 150 0.5 tshort Rshort VOL1 VOH1 VOL2 VOH2 IDD Istandby V V µA µA *) Please refer to Test Circuit unless otherwise specified. 6 RN5VM1× × C/D • RN5VM111D Symbol Item Conditions MIN. TYP. MAX. Topt=25˚C Unit VDD1 Vst VDET1 VHYS1 Operating input voltage Minimum operating voltage for 0V charging Over-charge threshold voltage Over-charge threshold hysteresis range Output delay time of over-charge Over-discharge threshold voltage Output delay time of over-discharge Excess current threshold voltage Output delay time of excess current Short detection voltage Output delay time of short detection Reset resistance for excess current protection Nch ON voltage of COUT Pch ON voltage of COUT Nch ON voltage of DOUT Pch ON voltage of DOUT Supply current Standby current Voltage defined as VDD–VSS Voltage defined as VDD–V-, VDD–Vss=0V Detect rising edge of supply voltage 1.5 10 1.2 V V V V ms V ms V ms V µs kΩ V V 4.20 0.15 4.25 0.20 75 2.500 10 0.20 13 4.30 0.25 100 2.563 13 0.23 17 tVDET1 VDET2 C3=0.01µF, VDD=3.6V→ 4.3V Detect falling edge of supply voltage VDD=3.6V→ 2.4V Detect rising edge of “V-” pin voltage VDD=3.0V VDD=3.0V VDD=3.0V VDD=3.6V, V-=1.0V IOL=50µA, VDD=4.4V IOH=–50µA, VDD=3.9V IOL=50µA, VDD=2.4V IOH=–50µA, VDD=3.9V VDD=3.9V, V-=0V VDD=2.0V 50 2.437 7 0.17 9 tVDET2 VDET3 tVDET3 Vshort VDD–1.1 VDD–0.8 VDD–0.5 5 50 100 0.2 3.4 3.8 0.2 3.4 3.7 3.0 0.3 6.0 0.6 0.5 50 150 0.5 tshort Rshort VOL1 VOH1 VOL2 VOH2 IDD Istandby V V µA µA *) Please refer to Test Circuit unless otherwise specified. 7 RN5VM1×× C/D • RN5VM112D Symbol Item Conditions MIN. TYP. MAX. Topt=25˚C Unit VDD1 Vst VDET1 VHYS1 Operating input voltage Minimum operating voltage for 0V charging Over-charge threshold voltage Over-charge threshold hysteresis range Output delay time of over-charge Over-discharge threshold voltage Output delay time of over-discharge Excess current threshold voltage Output delay time of excess current Short detection voltage Output delay time of short detection Reset resistance for excess current protection Nch ON voltage of COUT Pch ON voltage of COUT Nch ON voltage of DOUT Pch ON voltage of DOUT Supply current Standby current Voltage defined as VDD–VSS Voltage defined as VDD–V-, VDD–Vss=0V Detect rising edge of supply voltage 1.5 10 1.2 V V V V ms V ms V ms V µs kΩ V V 4.30 0.15 4.35 0.20 80 2.500 10 0.20 13 4.40 0.25 105 2.563 13 0.23 17 tVDET1 VDET2 C3=0.01µF, VDD=3.6V→ 4.4V Detect falling edge of supply voltage VDD=3.6V→ 2.4V Detect rising edge of “V-” pin voltage VDD=3.0V VDD=3.0V VDD=3.0V VDD=3.6V, V-=1.0V IOL=50µA, VDD=4.4V IOH=–50µA, VDD=3.9V IOL=50µA, VDD=2.4V IOH=–50µA, VDD=3.9V VDD=3.9V, V-=0V VDD=2.0V 55 2.437 7 0.17 9 tVDET2 VDET3 tVDET3 Vshort VDD–1.1 VDD–0.8 VDD–0.5 5 50 100 0.2 3.4 3.8 0.2 3.4 3.7 3.0 0.3 6.0 0.6 0.5 50 150 0.5 tshort Rshort VOL1 VOH1 VOL2 VOH2 IDD Istandby V V µA µA *) Please refer to Test Circuit unless otherwise specified. 8 RN5VM1× × C/D TIMING DIAGRAM • RN5VM1××C Open Charging Discharging Charging Discharging Charging Discharging Charging current Excess Open Short circuit VDET1 VDET1–VHYS1 VDD VDET2 t VDD Vshort V- VDET3 VSS tVDET1 VDD tVDET1 t COUT V- tVDET2 VDD tVDET2 tVDET3 tshort t DOUT VSS t Charging Current Charging/ Discharging Current 0 t Discharging Current 9 RN5VM1×× C/D • RN5VM1××D Open Charging Discharging Self discharging Discharging Charging Discharging Open Excess Charging current Open Short circuit VDET1 VDET1–VHYS1 VDD VDET2 t VDD Vshort VVDET3 VSS tVDET1 VDD t COUT V- tVDET3 VDD tVDET2 tVDET2 tVDET3 tshort t DOUT VSS t Charging Current Charging/ Discharging Current 0 t Discharging Current 10 RN5VM1× × C/D 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 VDET1, the VD1 can sense over-charging and an external charge control Nch-MOS-FET turns to “OFF” with COUT pin 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 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 output a signal for turning “OFF” of charg control Nch-MOS-FET. The output delay time can be calculated as below: C3 × (VDD– 0.7) tVDET1 = 0.48 × 10–6 · A level shifter incorporated in a buffer driver for the COUT pin makes the “L” of COUT pin to the V- pin voltage and the “H” of COUT pin is set to VDD voltage with CMOS buffer. Reset conditions from overcharging of RN5VM1 ×× C · There can be two cases to reset the VD1 making the COUT pin level to “H” again after detecting over-charge. 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