TC6002
BATTERY PROTECTOR AND MOSFET COMBO
Features z z z z z z Description The TC6002 series is a member of Battery Protector product family. This device uses the company's properit-ary patent pending(US & China) Smart Switch tech-nology to implement on-chip MOSFETs, thus reducing manufacturing cost and increaseing reliability. The de-vice is designed to protect single-cell Li-Ion and Li-Pol battery packs from either overcharge, overdis-charge or overcurrent. z z No External MOSFETs Required Equivalent of 55 mΩ RDS(ON) on-chip MOSFET Only one external capacitor required in application Overtemperature Protection Overcharge Current Protection Three-step Overcurrent Detection: Overdischarge Current 1, Overdischarge Current 2 and Load Short Circuiting Charger Detection Function Delay Times (Overcharge Voltage: tCU, Overdischarge Voltage: tDL, Overdischarge Current 1: tODC1, Overdischarge Current 2: tODC2, Load Short Circuit: tSHORT, Overcharge Current Detection Delay Time: tOCC) are generated internally. No external capacitor is necessary. Accuracy: ±20% High-accuracy Voltage Detection Low Current Consumption Operation Mode: 2.0uA typ., 4.0uA max. Power-down Mode: 0.01uA max. Small Outline MSOP-8 Package RoHS Compliant and Lead (Pb) Free The device contains all required protection control cir cuits together with very-low-resistance MOSFETs to min- imize the number of external components. It incorporates overcharge voltage and current protection, overdis-charge voltage and current protection, overtemperature protection, short circuit protection and comsumes very little power. The device is not only targeted for digital cellular phones, but also for any other Li-Ion and Li-Pol battery-powered information appliances requiring long-term battery life. z z z z z z ORDER INFORMATION See page 18.
http://www.topchipsemi.com
Preliminary Product InformationTopchip semi reserves the right to modify this product without notice.
Copyright Topchip Semiconductor (All Rights Reserved)
This document contains information for a new product. Sep’ 09
V1.2
TC6002
TABLE OF CONTENTS
1. Overview ......................................................................................................................3 2. Pin Description .................................................................................................................4
Pin Configration ......................................................................................................................4 Pin Description .......................................................................................................................4 3. CharacteristiTC & Specifications ....................................................................................5
Recommended Operating Conditions ....................................................................................5 Electrical CharacteristiTC .......................................................................................................5
Absolute Maximum Ratings ......................................................................................................9
4. Functional Description .........................................................................................................10
5. State Machine ........................................................................................................................12 6. Timing ........................................................................................................................13 7. Measurement Test Setup ....................................................................................................15
8. Typical Application ..........................................................................................................17
9. Package Dimensions .........................................................................................................18
10. Ordering Information .....................................................................................................19 11. Environmental,Manufcturing, &Handing Information .........................................20
12. Revision History .............................................................................................................21
LIST OF FIGURES
Figure 1. Pin Configuration of TC6002 Series ...............................................................04 Figure 2. Operation State Diagram of TC6002 Series ..................................................12
Figure 3. Overcharge and Overdischarge Voltage Detection ..................................13
Figure 4. Overdischarge Current Detection ...................................................................13
Figure 5. Charger Detection ......................................................................................................14 Figure 6. Overcharge Current Detection .............................................................................14 Figure 7. Test Circuit ............................................................................................................15
Figure 8. TC6002 Series in a Typical Battery Protection Circuit ............................17
Figure 9. Typical PCB Layout ............................................................................................17
Figure 10. Package Outline Drawing ..................................................................................18
2
TC6002 1. OVERVIEW
The TC6002 series is a member of the Battery Protector product family. It uses the company's properitary patent pending (US & China) Smart Switch technology to implement on-chip MOSFETs, thus reducing manufacturing costs and increasing reliability. The device is designed to protect single cell Li-Ion and Li-Pol battery packs from overcharge, overdischarge, or overcurrent.
The device contains all required protection control circuits together with very-low-resistance MOSFETs to minimize the number of external components. It incorporates overcharge voltage and current protection, overdischarge volt- age and current protection, overtemperature protection, short circuit protection and comsumes very little power.
The device is not only targeted for digital cellular phones, but also for any other Li-Ion and Li-Pol battery-powered information appliances requiring long-term battery life.
3
=
TC6002
2. PIN DESCRIPTION
Pin Configuration
MSOP-8 Top View
8 7
6 5
1 2 3 4
Figure 1. Pin Configuration of TC6002 Series
Pin Description
Pin Number
1 2 3 4 5 6 7 8
Pin Name VDD VDD VCC GND
I/O I I I I
Positive power input Positive power input Core circuit power supply pin Ground pin
Open or connect to GND I I/O I/O
Test pin, open or connect to GND Positive charge input, overcurrent detection Positive charge input, overcurrent detection
Function
TEN VM VM
4
TC6002 3. CHARACTERISTITC & SPECIFICATIONS
Recommended Operating Conditions
Parameter Supply voltage (between VDD and GND) Charger input voltage (between VM and GND) Operating Temperature Range
Symbol VDD VM TOPR
Min 2.0 -0.3 -40 Max 5.0 5.5 85 Unit V V oC
5
TC6002 Electrical CharacteristiTC for TC6002F
Typicals and limits appearing in normal type apply for TA = 25oC. Limits appearing in Boldface type apply for TA= -40oC to 85oC, unless otherwise specified.
Parameter Detection Voltage Symbol Typ Max
Test ConditionMinUnit
Overcharge Detection Voltage VCU=3.9V to 4.4V, 12.5mV Step
VCU
Overcharge hysteresis voltage VHC=0V to 0.4V, 12.5mV Step
VHC
Overdischarge Detection Volt- age VDL=2.0V to 3.0V, 12.5mV Step
VDL
Overdischarge hysteresis voltage
VHD=0.0V to 0.7V, 12.5mV
VHD
Charger Detection Voltage
VCHA
VCU -0.025 VCU -0.055 VHC -0.025 VHC -0.025 VDL -0.025 VDL -0.050 VHD -0.025 VHD -0.050 VDD +0.07 VDD +0.02
VDD=3.5V VDD=3.5V VDD=3.5V VDD=3.5V VCU VCU VHC VHC VDL VDL VHD VHD VDD +0.12 VDD +0.12 3.0 3.0 3.0 3.0 9.0 9.0 1.25 1.25 VCU +0.025 VCU +0.040 VHC +0.025 VHC +0.025 VDL +0.025 VDL +0.050 VHD +0.025 VHD +0.050 VDD +0.2 VDD +0.25 3.9 4.1 3.9 4.1 10.5 11.5 1.30 1.35 V
V
V
V
V
Detection Current Overcharge Current DetectionCurrent
IOCC IODC1 IODC2 VSHORT
Overdischarge Current 1 Detection Current
Overdischarge Current 2 Detection Current
Load Short-Circuiting Detection Voltage 6
2.1 1.9 2.1 1.9 7.5 7.0 1.20 1.15 A A A V
TC6002
Electrical CharacteristiTC for TC6002F (Continued)
Typicals and limits appearing in normal type apply for TA = 25oC. Limits appearing in Boldface type apply for TA= -40oC to 85oC, unless otherwise specified.
Test Parameter Symbol Min Condition
Current Consumption Current Consumption in VDD=3.5V 1.0 IOPE
VM pin floating 0.7 Nor- mal Operation
Current Consumption in power
IDDQ VDD=2.0V
Down VM pin floating
VM Internal Resistance Internal Resistance RVMD VDD=3.5V 13 between
VM=1.0V 10 VMandVDD Internal Resistance VDD=2.0V 300 RVMS between
VM=1.0V 225 VMandGND FET on Resistance
Equivalent FET on Resistance RDS(ON) VDD=4.0V IVM =1.0A
VDD=3.6V IVM =1.0A
VDD=3.0V IVM =1.0A
Over Temperature Protection
TSHD+ Over Temperature Protection Over Temperature Recovery TSHD- Degree
Detection Delay Time Overcharge
Voltage Detection0.96 tCU
Typ 2.0 2.0 Max 3.0 4.0 0.01 0.1 Unit
uA uA KΩ KΩ
20 20 450 450 55 57 61 120 30 40 675 900 59
m Ω
100
1.2 1.2 144 144 9.0 9.0 1.4 2.0 173 245 11 15 oC
Delay Time
Overdischarge Voltage Detection Delay Time
Overdischarge Current 1 Detection DelayTime
Overdischarge Current 2
Detection DelayTime
Load Short-Circuiting Detec- tion Delay Time
Overcharge Current Detection Delay Time tDL tODC1 tODC2 tSHORT tOCC
VDD=3.5V VDD=3.5V VDD=3.5V VDD=3.5V 0.7 115 80 7.2 5.0 3.62.4220 150 7.2 5.9 s
ms ms ms us ms
4.48 5.4 4.48 7.6 320 320 9.0 9.0 380 540 11 15 7
TC6002 Absolute Maximum Ratings
Parameter
Supply Voltage (between VDD and GND) Charger Input Voltage (between VM and GND) Junction Temperature Storage Temperature Range Power Dissipation ESD: Human Body Mode ESD: Machine Mode
Symbol VDD VM TJMAX TSTG PMAX HBM MM
Min 0VDD -10.0
Max 8.010.0 150
-55
125 500 2000 200
Unit VV
oCoC
mW V V
Note: Stresses greater than those listed under \"Absolute Maximum Ratings\" may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other condi- tions beyond those indicated under \"Recommended Operating Conditions\" is not guaranteed. Exposure to \"Absolute Maximum Ratings\" for extended periods may affect device reliability.
8
TC6002
4. Functional Description
The TC6002 series monitors the voltage and current of a battery and protects it from being damaged due to overcharge voltage, overdischarge voltage, overdis-charge current, and short circuit conditions by dis-connecting the battery from the load or charger. These functions are required in order to operate the battery cell within specified limits.
The device requires only one external capacitor. The MOSFET is integrated and has a low Equivalent RDS(ON) of 55 mΩ typical.
For the TC6002/TC6002F, whether charger is connect-ed, once VDD is lower than overcharge release voltage (VCL), overcharge voltage condition is released.
(2). During overcharge voltage condition and while ba-ttery is disconnected from charger via internal MOSFET, charger input voltage must not exceed maximum voltage rating Vmax defined for the device. Exceeding maximum voltage Vmax may damage the device and battery.
4.3 Overcharge current condition
The TC6002 series supports four operating modes: While operating in the charge condition, if current
exceeds IOCC and it continues for overcharge current normal, discharge, charge, and low power.
detection delay time (tOCC) or longer, the IC will control
4.1 Normal operating mode the internal MOSFET to stop charging. This situation is If no exception condition is detected, charging and called overcharge current condition. discharging can be carried out freely. This condition is called the normal operating mode. The TC6002 series continuously monitors current and will release the overcharge current condition as soon as 4.2 Overcharge voltage condition the voltage of VM pin is equal or lower than voltage of When the battery voltage becomes higher than the VDD pin by connecting an external load which is already overcharge detection voltage (VCU) during charging connected to battery pack or charger is removed. under the normal condition and the detection continues for a period equal to overcharge voltage detection delay 4.4 Overdischarge voltage condition time (tCU) or longer, the TC6002 series will control the When battery voltage falls below overdischarge detec-internal MOSFET to stop charging. This condition is tion voltage (VDL) during discharging under normal called the overcharge voltage condition. If the error condition and detection continues for overdischarge condition clears within overcharge voltage detection detection delay time (tDL) or longer, the TC6002 delay time (tCU), no action will be taken. series disconnects the battery from the load to stop further discharging. This situation is called over-The overcharge condition is released by the following discharge voltage condition. When discharge control two events: MOSFET is turned off, VM pin voltage is pulled down (1). Charger is connected and the voltage of VM pin is by a resistor between VM and GND in the IC (RVMS). lower than charger detection voltage (VCHA), battery When voltage difference between VM and GND is 1.5V voltage falls below overcharge release voltage (VCL). (typical) or lower, current consumption is reduced to
power-down current consumption (IDDQ). This situation (Note: VCL = VCU - VHC)
(2). Charger is disconnected and the battery voltage falls is called the power-down condition. below overcharge detection voltage (VCU).
The power-down condition is released when a charger
is connected and voltage difference between pin VM If the charger is disconnected and the battery voltage is
and GND becomes 2.0V (typical) or higher. Additionally, still higher than the overcharge detection voltage, the
when the battery voltage equals the overdischarge battery will discharge via internal diode.
detection voltage (VDL) or is higher, the TC6002 series
Notes: returns to the normal condition. (1). For all devices in this family except TC6002/ TC6002F, when a charger is connected after overcharge detection voltage and voltage of VM pin is higher than charger detection voltage (VCHA), overcharge voltage condition is not released even if battery voltage is below overcharge release voltage (VCL). Overcharge voltage condition is released by removing charger.
9
4.5 Overdischarge Current Condition (Detection of Overdischarge current1, Overdischarge current 2)
If discharge current exceeds the specified value and condition lasts for overdischarge current detection delay time, battery is disconnected from load. If current drops again below specified value during delay time, no actions will be taken.
TC6002
4.9 TEN pin
By forcing TEN to Vdd, the dely time of overcharge voltage¤t, over dischanrge voltage, overdis-charge current1, overdischarge current2 can be reduced. Thereforce, testing time of protect circuit board can be reduced.
TEN pin should be left open or connect to GND in the actual application.
The overdischarge current status is reset when impedance between VM pin and GND increases and is equal to or higher than impedance that enables automatic restoration to normal status. Disconnecting load surely restores to normal status from overdischarge current condition.
ON
4.6 Load Short-circuiting condition
If voltage of VM pin is equal or below short circuiting protection voltage (VSHORT), the IC will stop discharging and battery is disconnected from load. The maximum delay time to switch current off is tSHORT.
This status is released when voltage of VM pin is higher than short protection voltage (VSHORT), such as when disconnecting the load.
Discharge OFF Time Idd
tODC2
4.7 Charger Detection
When a battery in overdischarge condition is connected to a charger and provided that voltage of VM pin is equal or higher than charger detection voltage (VCHA), the TC6002 series releases overdischarge condition when battery voltage becomes equal to or higher than overdischarge detection voltage (VDL).
When a battery in overdischarge condition is connected to a charger and provided that voltage of VM pin is equal or higher than 2.0V (typical), and lower than charger detection voltage (VCHA), the TC6002 series releases overdischarge condition when battery voltage reaches overdischarge detection voltage (VDL) +overdischarge voltage hysteresis (VHD) or higher.
Iodc2
Iodc1
0 Time
4.8 Delay Circuits
The detection delay time for overdischarge current 2 and load short-circuiting starts when overdischarge cur-rent 1 is detected. As soon as overdischarge current 2 or load short-circuiting is detected over detection delay time for overdischarge current 2 or load short- circuiting, the TC6002 series stops discharging.
When battery voltage falls below overdischarge detec-tion voltage due to overdischarge current, the TC6002 series stops discharging by overdischarge current detection. In this case the recovery of battery voltage is so slow that if battery voltage after overdischarge voltage detection delay time is still lower than overdischarge detection voltage, the TC6002 series shifts to power-down condition.
10
TC6002
5. State Machine
Over charge current
State,
(Stop charging)
VDD VDD>VDL & ILOAD>IODC & t>tODC or VDD>VDL & VVM VDD>VCU & t>tCU VDD Over charge voltage State, (Stop charging) Over discharge current State, (Stop discharging) VDD Power down State, (Stop discharging and IDD<=IDDQ) Charger is detected & VDD Note: Ichr: Charge current under charging condition Figure 2. Operation State Diagram of TC6002 Series 11 TC6002 6. Timing VCU VCU-VHC Battery voltage VDL+VDH VDL Discharge ON OFF Charge ON OFF Charger connection Load connection tCU (1) (2) (1) tDL (3) (1) Remark: (1) Normal condition (2) Overcharge voltage condition (3) Overdischarge volatge condition The charger is supposed to charge with constant current Figure 3. Overcharge and Overdischarge Voltage Detection VCU VCU -V HC Battery voltage VDL+VDH V DL ON Discharge OFF VM VM VOD C1 V OD C2 VSHOR T GND Load connection tOD C1 tODC2 tSH OR T (1) (4) (1) (4) (1) (4) (1) Rem ark: (1) Norm al condition (4) Overdischarge current condition Figure 4. Overdischarge Current Detection 12 TC6002 VCU V -V CU HC Battery voltage V DL+VDH VDL D ischarge ON OF F VM VDD +0.12V(T yp.) Vdd GN D C harger connection Load connection tDL (1) (3) (1) R em ark: (1) N orm al condition (3) O verdischarge voltage condition T he charger is supposed to charge w ith constant current Figure 5. Charger Detection Battery voltage VCU VCU-VHC VDL+VDH VDL ON Discharge OFF ON Charge OFF VM GND VCHA VOCC Vdd Charger connection Load connection tDL tOCC (1) (2) (1) (3) Remark: (1) Normal condition (2) Overcharge current condition (3) Overdischarge voltage condition The charger is supposed to charge with constant current Figure 6. Overcharge Current Detection 13 TC6002 7. Measurement Test Setup V3 I3 A V V2 S2 V1 V DD VM C1 0.1u F A V CC TC 600 2 Ser i es A I2 GND S1 I1 Figure 7. Test Circuit The test setup in Figure 8 can be used to measure the performance of the battery protection IC. All measurements assume the part is in normal mode. 7.1 Overdischarge Voltage (Overdischarge detection voltage, low power mode current, Overdischarge release voltage) Settings: Settings: Battery Charger Switch 1 Switch 2 V1 V3 S1 S2 3.5V, 10mA Current Limit 0.05V, 5mA Current Limit Open Closed Instruction: · Increase V1 from 3.5V gradually · When current I3=0 then overcharge voltage VCU is detected · Decrease overcharge voltage V1 gradually · When current I3=5mA then overcharge release voltage VCL is detected · Battery Charger Switch 1 Switch 2 V1 V3 S1 S2 3.5V, 10mA Current Limit -0.05V, 5mA Current Limit Open Closed Instruction: · Decrease V1 from 3.5V gradually · When current I3=0 then overdischarge voltage V1 is detected · Opening switch 1 and switch 2 to measure I1 current in low power mode · Close switch 2 · Increase V1 gradually until voltage I3=5mA · V1 represents the overdischarge release voltage Hysteresis voltage is calculated by VCH=VCU-VCL 7.3 Overdischarge Current Settings: BatteryCharger Switch 1 Switch 2 V1V3 S1 S2 3.5V, 10mA Current Limit-2.0V, 10mA Current Limit Open Closed 7.2 Overcharge Voltage (Overcharge detection voltage, Overcharge release voltage) 14 Instruction: · Increase current limit settings of charger V3 rapidly (within 10∝s) from its starting point, When current I3=0 whose delay time lies between the minimum and maximum value of overdischarge current 1 delay time (tODC1), then overdischarge current 1 is detected · Open switch2 · Increase current limit settings of charger V3 rapidly (within 10∝s) from its starting point, When current I3=0 whose delay time lies between minimum and maximum value of overdischarge current 2 delay time (tODC2), then overdischarge current 2 is detected · Open switch2 · Increase current limit settings of charger V3 rapidly (within 10∝s) from its starting point, When current I3=0 whose delay time lies between minimum and maximum value of short circuiting detection delay time (tSHORT), then voltage of VM is the short circuiting detection voltage TC6002 7.4 Overcharge Current Settings: Battery Charger Switch 1 Switch 2 V1 V3 S1 S2 3.5V, 10mA Current Limit 2.0V, 10mA Current Limit Open Closed Instruction: · Increase current limit settings of charger V3 rapidly (within 10∝s) from its starting point, When current I3=0 whose delay time lies between minimum and maximum value of overcharge current delay time (tOCC), then overcharge current IOCC is detected · Open switch 2 · Close switch 1 to connect load with I2=10mA · Part is released into normal mode 15 TC6002 8. Typical Application As shown in Figure 8, the bold line is the high density current path which must be kept as short as possible. For ther- mal management, ensure that these trace widths are adequate. C1 is a decoupling capacitor which should be placed as close as possible to the IC. These principles are implemented in Figure 9, the typical PCB layout. VDD VM P+ Battery C1 0.1uF VCC TC6002 Se rie s Load DC GND Charger P- Figure 8. TC6002 Series in a Typical Battery Protection Circuit Note: C1 is used for protecting power fluctuation. Recommended typical value is 0.1uF (min 0.022uF, max 1.0uF). P＋ B＋ B－ P－ Figure 9. Typical PCB Layout Note: Red is Top, Blue is Bottom; Via resistance: 10mΩ. 16 TC6002 9. Package Dimensions Note: unit: mm (inch) Figure 10. Package Outline Drawing 17 TC6002 10. Ordering Information TC6002 Circuit Type X: Tape and Reel Blank: Tube Extension Code Package K: MSOP-8 Part Number TC6002DKX TC6002FKX Marking ID 6002D 6002F Packing Type Tape & Reel Tape & Reel Package MSOP-8 MSOP-8 Temperature Range -40 to 85oC -40 to 85oC Product Family Available Product Model Overcharge Overcharge Overdis- Detection Hysteresis charge Voltage Voltage Detection (VCU) (VHC) Voltage (VDL) 4.325V 4.275V 0.20V 0.20V 2.5V 2.5V Overdis- charge Hysteresis Voltage (VHD) 0.4V 0.4V Overdis- charge Current 1(IODC1) 3.0A 3.0A Overdis- charge Current 2 (IODC2) 9.0A 9.0A Overcharge Voltage Detection Delay Time(tCU) 1200ms 1200ms TC6002D TC6002F 18 TC6002 11. ENVIRONMENTAL, MANUFCTURING, & HANDING INFORMATION Part Number TC6002 Series Peak Reflow Temp 260oC MSL Rating* min 3 Max Floor Life min 7 Days * MSL (Moisture Sensitivity Level) as specified by IPC/JEDEC J-STD-020. 19 TC6002 12. REVISION HISTORY Revision V1.0 V1.2 Date July 2008 Sep 2009 Changes Preliminary Release Added TC6002D parameter Contacting TopChip Semiconductor Support For all product questions and inquiries contact TopChip Semiconductor. To find the one nearest to you go to www.topchipsemi.com IMPORTANT NOTICE \"Preliminary\" product information describes products that are in production, but for which full characterization data is not yet available. TopChip semiconductor believes that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided “AS IS” without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 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