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RECHARGEABLE LITHIUM-ION CELL PROTECTORS
RV5VG1x x SERIES x
OUTLINE
EK-080-9803
The RV5VGxxseries Li-ion cell protectors are circuits designed for detecting overcharging and excessive disx charging of rechargeable single-cell lithium-ion batteries (based on the CMOS process). Besides detecting over-
x charging or excessive discharging of single cell Li-ion battery, the RV5VG1xxseries Li-ion cell protectors include
a short-circuit protector to prevent excessive current due to an external short-circuit. Each of these protectors comprise two voltage detectors, a hysteresis circuit, a reference voltage source, a logic circuit, a short-circuit protector and a charger connection detection-circuit. Of the two voltage detectors, VD1 detects overcharging (rising edge of waveform) while VD2 detects excessive discharging (falling edge of waveform). Voltage output switches to a low ("L") state if either a rising or falling voltage level is detected. When a short protection circuit is activated while DOUT output is at "H" level, DOUT output switches to "L" level after internally set delay time, which, in turn, switches to "H" level when short is cleared. Required current after detection of overdischarge is suppressed to minimum by stopping the internal circuit. Using an external capacitor, the output delay time of the voltage detector for excessive discharge/overcharge can be set. The series employ CMOS output type.
FEATURES
* Low Supply Current ...................................................................TYP. 2.3A (for normal operations) * High Accuracy Detector Threshold............................................over-charge
50mV 2.5% 4.0 to 4.5 V(0.05V step) 2.0 to 3.0V(0.05V step)
over-discharge ...................................................over-charge * Variety of Detector Threshold over-discharge
* Built-in Protection Circuit
* Short protection voltage may be set insteps 0.05V within the range of 0.1V to 0.4V (accuracy15%) * Adustable sensing delay for overcharging ................................delay of 43ms when external 1000pF is installed
(VDD=4.3V)
* Adjustable sensing delay for excessive discharging.................delay of 24ms when external 1000pF is installed
(VDD=2.4V) ................................................................................CMOS * Output Type * Small Package ............................................................................8pin SSOP
APPLICATIONS
* Li-ion single cell protectors for power pack. * High precision protectors for cellular phones, camcorders and any other gadgets using Li-ion cell.
1
RV5VG1x x x
BLOCK DIAGRAM
8 8 VDD 7 CT1 5 5 CT2
- + VD1
Level Shift
- +
VD2 Delay Short Protect
Charger Detector
4 4 VSS DOUT
1 1 COUT
2 2 V-
3 3
SELECTION GUIDE
In the RV5VG1xxseries, the overcharge/excessive discharge detector threshold, respective hysteresis ranges, x short-circuit detector threshold and taping type can be selected at the user's request. The selection can be made by designating the part number as shown belows. RV5VG1x x- x x x Part Number
}
}
c
ab
Code
Contents
a
Development serial number for overcharging/excessive discharge detector threshold, hysteresis ranges, and short-circuit detector threshold. Designation of release conditions of voltage detector. C : VD1 (After over-charge detection) ...................when battery voltage falls below VDET1-VHYS1 or a load resistance is applied. VD2 (After excessive-discharge detection) ......when a charger is connected. D : VD1 (After over-charge detection)...................when battery voltage falls below VDET1-VHYS1. VD2 (After excessive-discharge detection) .....when battery voltage rises above VDET2+VHYS2 or a charger is connected. Designation of Taping Type: EX. 8pin SSOP: E1, E2 (refer Taping Specifications) "E2" is prescribed as a standard.
b
c
2
PIN CONFIGURATION
* 8pin SSOP (0.65mm pitch)
1 2 3 4
8 7 6 5
PIN DESCRIPTION
Pin No. Symbol Pin Description
1 2 3 4 5 6 7 8
DOUT COUT VVSS CT2 NC CT1 VDD
Output Pin of over-discharge detection, CMOS output Output Pin of over-charge detection, CMOS output Pin for charger negative input Ground Pin Pin for external capacitor for setting output delay of VD2 No connection Pin for external capacitor for setting output delay of VD1 Power supply Pin
3
RV5VG1x x x
ABSOLUTE MAXIMUM RATINGS
Symbol Item Ratings
Topt=25C, VSS=0V
Unit
VDD V-
Supply Voltage V-pin Input Voltage CT1, CT2 pin COUT pin Output Voltage DOUT pin Power Dissipation Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering)
-0.3 to +12 VDD-12 to VDD+0.3 VSS-0.3 to VDD+0.3 VDD-12 to VDD+0.3 VSS-0.3 to VDD+0.3 300 -30 to +80 -55 to +125 260C, 10s
V V V V V mW C C
VCT1, VCT2 VCOUT VDOUT PD Topt Tstg Tsolder
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
RV5VG1x x x
ELECTRICAL CHARACTERISTICS
* RV5VG101C
Topt=25C
Symbol
Item
Conditions
MIN.
TYP.
MAX.
Unit.
VDD1 Operating Input Voltage VDD2 Over-charge Detector Threshold Over-charge Detector Hysteresis Range VDET1 Output Delay Time Over-discharge Detector Threshold VDET2 Output Delay Time Short protection Voltage
VDD to VSS VDD to V-
1.2 1.2
5 10
V V
VDET1
Voltage rising edge detection
4.20
4.25
4.30
V
VHYS1
0.15 C1=1000pF, VDD=3.6V 4.3V
0.20
0.25
V
tVDET1
VDET2
22
43
86
ms
Voltage falling edge detection C2=1000pF, VDD=3.6V 2.4V VDD=3.9V VDD=3.0V, V-=0V 1V
2.437
2.50
2.563
V
tVDET2
Vshort
12 0.17 2.4 1.4
24 0.2 4.8 2.8 0.17
48 0.23 9.6
ms V
tshort1
Short protection Delay Time
ms VDD=2.0V, V-=0V 1V 5.6 0.5 V V 0.5 V V 5.0 2.5 0.2 260 A A V k
tshort2
VOL1 VOH1 VOL2 VOH2 IDD Istandby Vchg Rshort COUT Nch Tr. ON Voltage COUT Pch Tr. ON Voltage DOUT Nch Tr. ON Voltage DOUT Pch Tr. ON Voltage Supply Current Standby Current Charger Sense Minimum Voltage V- pin pull down resistance
IOL=100A, VDD=4.4V IOH=-100A, VDD=3.9V IOL=100A, VDD=2.4V IOH=-100A, VDD=3.9V VDD=3.9V, V- =0V VDD=2.4V, V-=2.4V VDD=3.3V VDD=3.9V, V-=1.0V 65 3.4 3.4
3.73 0.17 3.73 2.3 0.2 0.13 130
5
RV5VG1x x x
* RV5VG101D
Topt=25C
Symbol
Item
Conditions
MIN.
TYP.
MAX.
Unit.
VDD1 Operating Input Voltage VDD2 Over-charge Detector Threshold Over-charge Detector Hysteresis Range VDET1 Output Delay Time Over-discharge Detector Threshold Over-discharge Detector Hysteresis Range VDET2 Output Delay Time Short protection Voltage
VDD to VSS VDD to V-
1.2 1.2
5 10
V V
VDET1
Voltage rising edge detection
4.20
4.25
4.30
V
VHYS1
0.15 C1=1000pF, VDD=3.6V 4.3V
0.2
0.25
V
tVDET1
VDET2
22
43
86
ms
Voltage falling edge detection
2.437
2.50
2.563
V
VHYS2
0.50 C2=1000pF, VDD=3.6V 2.4V VDD=3.9V VDD=3.0V, V-=0V 1V
0.60
0.70
V
tVDET2
Vshort
12 0.17 2.4 1.4
24 0.2 4.8 2.8 0.17
48 0.23 9.6
ms V
tshort1
Short protection Delay Time
ms VDD=2.0V, V-=0V 1V 5.6 0.5 V V 0.5 V V 5.0 2.5 0.2 260 A A V k
tshort2
VOL1 VOH1 VOL2 VOH2 IDD Istandby Vchg Rshort COUT Nch Tr. ON Voltage COUT Pch Tr. ON Voltage DOUT Nch Tr. ON Voltage DOUT Pch Tr. ON Voltage Supply Current Standby Current Charger Sense MinimumVoltage V- pin pull down resistance
IOL=100A, VDD=4.4V IOH=-100A, VDD=3.9V IOL=100A, VDD=2.4V IOH=-100A, VDD=3.9V VDD=3.9V, V- =0V VDD=2.4V, V-=2.4V VDD=2.9V VDD=3.9V, V-=1.0V 65 3.4 3.4
3.73 0.17 3.73 2.3 1.0 0.1 130
6
RV5VG1x x x
TYPICAL APPLICATION
+
100 1000pF C1 8 VDD 0.1F RV5VG1xxx 4 VSS DOUT 1 V- 3 COUT 2 7 CT1 5 CT2 0.1F 1000pF C2
0.1F 1K
-
7
RV5VG1x x x
PACKAGE DIMENSIONS (Unit: mm)
* 8pin SSOP (0.65mm pitch)
4.40.2 0.575 TYP. 3.10.3 1.150.1
6.40.3
0.10.1
0.65
0.50.3
0.220.1 0.15
0.15 M
TAPING SPECIFICATION (Unit: mm)
* 8pin SSOP (0.65mm pitch)
+0.1 o1.5 -0 4.00.1 2.00.05
1.750.1
0.30.1
0.15 +0.1 -0.05
5.50.05
6.9 8.00.1 2.7MAX.
E1 User Direction of Feed.
E2
8
3.7
12.00.3
NOTICE
1. The products and the product specifications described in this document 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 document 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 document shows typical characteristics of and example application circuits for the products. The release of such information is not to be construed as a warranty of or a grant of license under Ricoh's or any third party's intellectual property rights or any other rights. 5. The products listed in this document are intended and designed for use as general electronic components in standard applications (office equipment, computer equipment, measuring instruments, consumer electronic products, amusement equipment etc.). Those customers intending to use a product in an application requiring extreme quality and reliability, for example, in a highly specific application where the failure or misoperation of the product could result in human injury or death (aircraft, spacevehicle, nuclear reactor control system, traffic control system, automotive and transportation equipment, combustion equipment, safety devices, life support system etc.) should first contact us. 6. We are making our continuous effort to improve the quality and reliability of our products, but semiconductor products are likely to fail with certain probability. In order prevent any injury to persons or damages to property resulting from such failure, customers should be careful enough to incorporate safety measures in their design, such as redundancy feature, fire-containment feature and fail-safe feature. We do not assume any liability or responsibility for any loss or damage arising from misuse or inappropriate use of the products. 7. Anti-radiation design is not implemented in the products described in this document. 8. Please contact Ricoh sales representatives should you have any questions or comments concerning the products or the technical information. 1995 June
RICOH COMPANY, LTD. ELECTRONIC DEVICES DIVISION
HEADQUARTERS 13-1, Himemuro-cho, Ikeda City, Osaka 563-8501, JAPAN Phone 81-727-53-1111 Fax 81-727-53-6011 YOKOHAMA OFFICE (International Sales) 3-2-3, Shin-Yokohama, Kohoku-ku, Yokohama City, Kanagawa 222-8530, JAPAN Phone 81-45-477-1697 Fax 81-45-477-1694 * 1695 http://www.ricoh.co.jp/LSI/english/
RICOH CORPORATION ELECTRONIC DEVICES DIVISION
SAN JOSE OFFICE 3001 Orchard Parkway, San Jose, CA 95134-2088, U.S.A. Phone 1-408-432-8800 Fax 1-408-432-8375

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