ETC1 BQ2000TPWR Programmable multi-chemistry fast-charge management ic Datasheet

bq2000T
Programmable Multi-Chemistry
Fast-Charge Management IC
Features
General Description
➤
Safe management of fast
charge for NiCd, NiMH, or
Li-Ion battery packs
➤
High-frequency switching
controller for efficient and
simple charger design
➤
Pre-charge qualification for
detecting shorted, damaged,
or overheated cells
➤
Fast-charge termination by
∆Τ/∆ t m i n i m u m c u r r e n t
(Li-Ion), maximum temperature, and maximum charge
time
➤
Selectable top-off mode for
achieving maximum capacity
in NiMH batteries
➤
Programmable trickle-charge
mode for reviving deeply discharged batteries and for
post-charge maintenance
➤
Built-in battery removal and
insertion detection
➤
Sleep mode for low power
consumption
The bq2000T is a programmable,
monolithic IC for fast-charge mana g e m e n t o f n i c ke l c a d m i u m
( N i C d ) , n i c ke l m e t a l - h y d r i d e
(NiMH), or lithium-ion (Li-Ion)
batteries
in
singleor
multi-chemistry applications. The
bq2000T detects the battery chemistry and proceeds with the optimal charging and termination algorithms. This process eliminates
undesirable undercharged or
overcharged conditions and allows
accurate and safe termination of
fast charge.
For safety, the bq2000T inhibits
fast charge until the battery voltage and temperature are within
user-defined limits. If the battery
voltage is below the low-voltage
threshold, the bq2000T uses
trickle-charge to condition the
battery. For NiMH batteries, the
bq2000T provides an optional
top-off charge to maximize the
battery capacity.
The integrated high-frequency
comparator allows the bq2000T to
be the basis for a complete,
high-efficiency power-conversion
circuit for both nickel-based and
lithium-based chemistries.
Depending on the chemistry, the
bq2000T provides a number of
charge termination criteria:
n
n
Rate of temperature rise, ∆Τ/∆t
(for NiCd and NiMH)
Minimum charging current (for
Li-Ion)
n
Maximum temperature
n
Maximum charge time
Pin Names
Pin Connections
SNS
1
8
MOD
VSS
2
7
VCC
LED
3
6
RC
BAT
4
5
TS
SNS
Current-sense
input
TS
Temperature-sense
input
VSS
System ground
RC
LED
Charge-status
output
Timer-program
input
VCC
BAT
Battery-voltage
input
Supply-voltage
input
MOD
Modulation-control
output
8-Pin DIP or Narrow SOIC
or TSSOP
PN-2000.eps
SLUS149B–FEBRUARY 2001
1
bq2000T
RC
Pin Descriptions
SNS
RC input used to program the maximum
charge-time, hold-off period, and trickle
rate during the charge cycle, and to disable or enable top-off charge
Current-sense input
Enables the bq2000T to sense the battery
current via the voltage developed on this
pin by an external sense-resistor connected in series with the battery pack
VSS
System Ground
LED
Charge-status output
Supply-voltage input
MOD
Modulation-control output
Functional Description
Battery-voltage input
The bq2000T is a versatile, multi-chemistry batterycharge control device. See Figure 1 for a functional
block diagram and Figure 2 for the state diagram.
Battery-voltage sense input. A simple resistive divider, across the battery terminals,
generates this input.
TS
VCC
Push-pull output that controls the charging current to the battery. MOD switches
high to enable charging current to flow
and low to inhibit charging- current flow.
Open-drain output that indicates the
charging status by turning on, turning off,
or flashing an external LED
BAT
Timer-program input
Temperature-sense input
Input for an external battery-temperature
monitoring circuit. An external resistive
divider network with a negative temperature-coefficient thermistor sets the lower
and upper temperature thresholds.
Figure 1. Functional Block Diagram
2
bq2000T
Figure 2. State Diagram
3
bq2000T
charge begins when the battery temperature and
voltage are valid.
Initiation and Charge Qualification
The bq2000T initiates a charge cycle when it detects
n
Application of power to VCC
n
Battery replacement
n
Exit from sleep mode
n
Capacity depletion (Li-Ion only)
Battery Chemistry
The bq2000T detects the battery chemistry by monitoring the battery-voltage profile during fast charge.
If the voltage on BAT input rises to the internal VMCV
reference, the IC assumes a Li-Ion battery. Otherwise
the bq2000T assumes NiCd/NiMH chemistry.
As shown in Figure 6, a resistor voltage-divider between the battery pack’s positive terminal and VSS
scales the battery voltage measured at pin BAT. In a
mixed-chemistry design, a common voltage-divider
is used as long as the maximum charge voltage of the
nickel-based pack is below that of the Li-Ion pack.
Otherwise, different scaling is required.
Immediately following initiation, the IC enters a
charge-qualification mode. The bq2000T charge
qualification is based on batter y voltage and
temperature. If voltage on pin BAT is less than the
internal threshold, VLBAT , the bq2000T enters the
charge-pending state. This condition indicates the
possiblility of a defective or shorted battery pack. In
an attempt to revive a fully depleted pack, the
bq2000T enables the MOD pin to trickle-charge at a
rate of once every 1.0s. As explained in the section
“Top-Off and Pulse-Trickle Charge,” the trickle
pulse-width is user-selectable and is set by the value
of the resistance connected to pin RC.
Once the chemistry is determined, the bq2000T
completes the fast charge with the appropriate
charge algorithm (Table 1). The user can customize
the algorithm by programming the device using an
external resistor and a capacitor connected to the RC
pin, as discussed in later sections.
During this period, the LED pin blinks at a 1Hz rate,
indicating the pending status of the charger.
NiCd and NiMH Batteries
Following qualification, the bq2000T fast-charges
NiCd or NiMH batteries using a current-limited algorithm. During the fast-charge period, it monitors
charge time, temperature, and voltage for adherence
to the termination criteria. This monitoring is further
Similarly, the bq2000T suspends fast charge if the
battery temperature is outside the VLTF to VHTF range.
(See Table 4.) For safety reasons, however, it disables
t h e p ul s e t r i c k l e , i n t h e c a s e o f a b att er y
over-temperature condition (i.e., VTS < VHTF). Fast
Current
IMAX
Qualification
VMCV
Voltage
Fast
Charge
Phase 1
VLBAT
Phase 2
Voltage
Trickle
Current
IMIN
Time
GR2000CA.eps
Figure 3. Lithium-Ion Charge Algorithm
4
bq2000T
Table 1. Charge Algorithm
Battery Chemistry
NiCd or NiMH
Li-Ion
Charge Algorithm
1. Charge qualification
2. Trickle charge, if required
3. Fast charge (constant current)
4. Charge termination (∆T/∆t, time)
5. Top-off (optional)
6. Trickle charge
1. Charge qualification
2. Trickle charge, if required
3. Two-step fast charge (constant current followed by constant voltage)
4. Charge termination (minimum current, time)
explained in later sections. Following fast charge, the
battery is topped off, if top-off is selected. The charging cycle ends with a trickle maintenance-charge that
continues as long as the voltage on pin BAT remains
below VMCV.
termine other features of the device. See Tables 2
and 3 for details.)
For Li-Ion cells, the bq2000T resets the MTO when
the battery reaches the constant-voltage phase of the
charge. This feature provides the additional charge
time required for Li-Ion cells.
Lithium-Ion Batteries
Maximum Temperature (NiCd, NiMH, Li-Ion)
The bq2000T uses a two-phase fast-charge algorithm
for Li-Ion batteries (Figure 3). In phase one, the
bq2000T regulates constant current until VBAT rises to
VMCV. The bq2000T then moves to phase two, regulates the battery with constant voltage of VMCV, and
terminates when the charging current falls below the
IMIN threshold. A new charge cycle is started if the
cell voltage falls below the VRCH threshold.
A negative-coefficient thermistor, referenced to VSS
and placed in thermal contact with the battery, may
be used as a temperature-sensing device. Figure 5
shows a typical temperature-sensing circuit.
During fast charge, the bq2000T compares the battery temperature to an internal high-temperature
cutoff threshold, VTCO. As shown in Table 4, high-temperature termination occurs when voltage at pin TS
is less than this threshold.
During the current-regulation phase, the bq2000T
monitors charge time, battery temperature, and
battery voltage for adherence to the termination
criteria. During the final constant-voltage stage, in
addition to the charge time and temperature, it
monitors the charge current as a termination
criterion. There is no post-charge maintenance mode
for Li-Ion batteries.
∆T/∆t (NiCd, NiMH)
When fast charging, the bq2000T monitors the voltage at pin TS for rate of temperature change detection, ∆T/∆t. The bq2000T samples the voltage at the
TS pin every 16s and compares it to the value measured 2 samples earlier. This feature terminates fast
charge if this voltage declines at a rate of
Charge Termination
Maximum Charge Time (NiCD, NiMH, and
Li-Ion)
VCC  V 


161  Min 
The bq2000T sets the maximum charge-time through
pin RC. With the proper selection of external resistor
and capacitor, various time- out values may be
achieved. Figure 4 shows a typical connection.
Figure 5 shows a typical connection diagram.
Minimum Current (Li-Ion Only)
The following equation shows the relationship between the RMTO and CMTO values and the maximum
charge time (MTO) for the bq2000T:
The bq2000T monitors the charging current during
the voltage-regulation phase of Li-Ion batteries. Fast
charge is terminated when the current is tapered off
to 7% of the maximum charging current. Please note
that this threshold is different for the bq2000.
MTO = RMTO ∗ CMTO ∗ 35,988
MTO is measured in minutes, RMTO in ohms, and
CMTO in farads. (Note: RMTO and CMTO values also de-
Initial Hold-Off Period
5
bq2000T
2
VCC
VSS
7
bq2000T
CMTO
RC
6
RMTO
F2000T RCI.eps
Figure 4. Typical Connection for the RC Input
VCC
2
VSS
7
VCC
RT1
bq2000T
5
TS
RT2
N Battery
T Pack
C
F2000TTMC.eps
Figure 5. Temperature Monitoring Configuration
BAT+
2
VSS
RB1
bq2000T
4
BAT
RB2
F2000TBVD.eps
Figure 6. Battery Voltage Divider
6
bq2000T
During top-off and trickle-charge, the bq2000T
monitors battery voltage and temperature. These
functions are suspended if the battery voltage rises
above the maximum cell voltage (VMCV) or if the temperature exceeds the high-temperature fault
threshold (VHTF).
The values of the external resistor and capacitor connected to pin RC set the initial hold-off period. During this period, the bq2000T avoids early termination
by disabling the ∆T/∆t feature. This period is fixed at
the programmed value of the maximum charge time
divided by 32.
hold-off period =
maximum time - out
32
Charge Current Control
The bq2000T controls the charge current through the
MOD output pin. The current-control circuit
s u p p or ts a s w i tc h i n g - c u r r en t r egu l ator w i t h
frequencies up to 500kHz. The bq2000T monitors
charge current at the SNS input by the voltage drop
across a sense-resistor, R SNS , in series with the
batter y pack. See Figure 9 for a typical current-sensing circuit. R SNS is sized to provide the
desired fast-charge current (IMAX):
Top-Off and Pulse-Trickle Charge
An optional top-off charge is available for NiCd or
NiMH batteries. Top-off may be desirable on batteries that have a tendency to terminate charge before
reaching full capacity. To enable this option, the capacitance value of CMTO connected to pin RC (Figure
4) should be greater than 0.13µF, and the value of the
resistor connected to this pin should be less than
15kΩ. To disable top-off, the capacitance value
should be less than 0.07µF. The tolerance of the capacitor needs to be taken into account in component
selection.
IMAX =
0.05
RSNS
If the voltage at the SNS pin is greater than VSNSLO or
less than V SNSHI , the bq2000T switches the MOD
output high to pass charge current to the battery.
When the SNS voltage is less than VSNSLO or greater
than VSNSHI, the bq2000T switches the MOD output
low to shut off charging current to the battery. Figure
8 shows a typical multi-chemistry charge circuit.
Once enabled, the top-off is performed over a period
equal to the maximum charge time at a rate of 116
that of fast charge.
Following top-off, the bq2000T trickle-charges the
battery by enabling the MOD to charge at a rate of
once every 1.0 second. The trickle pulse-width is
user-selectable and is set by the value of the resistor
RMTO, which is on pin RC. Figure 7 shows the relationship between the trickle pulse-width and the value of
RMTO. The typical tolerance of the pulsewidth below
150kΩ is ±10%.
Voltage Input
As shown in Figure 6, a resistor voltage-divider between the battery pack’s positive terminal and VSS
scales the battery voltage measured at pin BAT.
160
140
120
Shows Tolerance
Pulsewidth—ms
100
80
60
40
20
4
3
2
1
2
4
6
8
10
50
100
150
200
250
RMTO—kΩ
2000PNvB3.eps
Figure 7. Relationship Between Trickle Pulse-Width and Value of RMTO
7
bq2000T
Q1
FMMT718
D4
DC+
S1A
D3
MMSD914LT
C6
47UF
R9
120 OHMS
1000PF
Q3
MMBT3904LT1
VCC
D6
BZT52-C5V1
BAT+
D2
ZHCS1000
D5
MMSD914LT
C8
R7
1K
L1
47UH
Q2
MMBT3904LT1
R8
220 OHMS
C3
R2
2K
C7
10UF
C4
4.7PF
0.0022UF
R1
D1
RED
1
2
3
4
U1
SNS
VSS
LED
BAT
C2
0.1
R4
210K
C5
10UF
R13
10.5K
C9
0.33UF
100K
8
7
6
5
MOD
VCC
RC
TS
R12
THERM
100K
bq2000T
C1
0.1
R14
23.2K
R11
6.81K
R6
C10
0.01UF
CHEMISTRY
221K
BAT R5
200K
R10
1.1K
NOTES:
R3
0.05 OHM
1. For Li-Ion, the CHEMISTRY is left floating.
For NiCd/NiMH, the CHEMISTRY is tied to BAT2. DC input voltage: 9–16V
3. Charge current: 1A
Pn1031a02.eps
4. L1: 3L Global P/N PKSMD-1005-470K-1A
Figure 8. Single-Cell Li-Ion, Three-Cell NiCd/NiMH 1A Charger
8
bq2000T
Table 2. Summary of NiCd or NiMH Charging Characteristics
Parameter
Value
Maximum cell voltage (VMCV)
2V
Minimum pre-charge qualification voltage (VLBAT)
950mV
High-temperature cutoff voltage (VTCO)
0.225 ∗ VCC
High-temperature fault voltage (VHTF)
0.25 ∗ VCC
Low-temperature fault voltage (VLTF)
0.5 ∗ VCC
bq2000T fast-charge maximum time out (MTO)
RMTO ∗ CMTO ∗ 35,988
Fast-charge charging current (IMAX)
0.05/RSNS
Hold-off period
MTO/32
Top-off charging current (optional)
IMAX/16
Top-off period (optional)
MTO
Trickle-charge frequency
1Hz
Trickle-charge pulse-width
See Figure 7
For Li-Ion battery packs, the resistor values RB1 and
RB2 are calculated by the following equation:
In a mixed-chemistry design, a common voltage-divider is used as long as the maximum charge
voltage of the nickel-based pack is below that of the
Li-Ion pack. Otherwise, different scaling is required.
RB1 
VCELL 
 −1
= N ∗
RB2 
VMCV 
Temperature Monitoring
where N is the number of cells in series and VCELL is
the manufacturer-specified charging voltage. The
end-to-end input impedance of this resistive divider
network should be at least 200kΩ and no more than
1MΩ.
The bq2000T measures the temperature by the
voltage at the TS pin. This voltage is typically
generated by a negative-temperature-coefficient
thermistor. The bq2000T compares this voltage
against its internal threshold voltages to determine if
charging is safe.
A NiCd or NiMH battery pack consisting of N series-cells may benefit by the selection of the RB1
value to be N-1 times larger than the RB2 value.
Table 3. Summary of Li-Ion Charging Characteristics
Parameter
Value
Maximum cell voltage (VMCV)
2V
Minimum pre-charge qualification voltage (VLBAT)
950mV
High-temperature cutoff voltage (VTCO)
0.225 ∗ VCC
High-temperature fault voltage (VHTF)
0.25 ∗ VCC
Low-temperature fault voltage (VLTF)
0.5 ∗ VCC
bq2000T fast-charge maximum time-out (MTO)
2 ∗ RMTO ∗ CMTO ∗ 35,988
Fast-charge charging current (IMAX)
0.05/RSNS
Hold-off period
MTO/32
Minimum current (for fast-charge termination)
IMAX/14
Trickle-charge frequency (before fast charge only)
1Hz
Trickle-charge pulse-width (before fast charge only)
See Figure 7
9
bq2000T
Table 4. Temperature-Monitoring Conditions
Temperature
Condition
Action
VTS > VLTF
Cold battery—checked at all times
Suspends fast charge or top-off and timer
Allows trickle charge—LED flashes at 1Hz
rate during pre-charge qualification and fast
charge
VHTF < VTS < VLTF
Optimal operating range
Allows charging
VTS < VHTF
Hot battery—checked during charge
qualification and top-off and
trickle-charge
Suspends fast-charge initiation, does not allow trickle charge—LED flashes at 1Hz rate
during pre-charge qualification
Table 4 summarizes these various conditions.
These thresholds are the following:
n
n
n
High-temperature cutoff voltage: VTCO = 0.225 ∗
VCC This voltage corresponds to the maximum
temperature (TCO) at which fast charging is
allowed. The bq2000T terminates fast charge if the
voltage on pin TS falls below VTCO.
Charge Status Display
The charge status is indicated by open-drain output
LED. Table 5 summarizes the display output of the
bq2000T.
High-temperature fault voltage: VHTF = 0.25 ∗ VCC
This voltage corresponds to the temperature
(HTF) at which fast charging is allowed to begin.
Low-temperature fault voltage: VLTF = 0.5 ∗ VCC
This voltage corresponds to the minimum
temperature (LTF) at which fast charging or
top-off is allowed. If the voltage on pin TS rises
above VLTF, the bq2000T suspends fast charge or
Table 5. Charge Status Display
Charge Action State
Battery absent
Pre-charge qualification
Rf
LED Status
High
impedance
RSNS
Cf
2
BAT-
1Hz flash
1 SNS
VSS
bq2000T
Trickle charge (before fast charge) 1Hz flash
Power Supply ground
Fast charging
Low
Top-off or trickle (after fast
charge, NiCd, NiMH only)
High
impedance
bq2000 ground
Charge complete
High
impedance
2000TCS.eps
Figure 9. Current-Sensing Circuit
top-off but does not terminate charge. When the
voltage falls back below VLTF, fast charge or top-off
resumes from the point where suspended.
Trickle-charge is allowed during this condition.
10
Sleep Mode
The bq2000T features a sleep mode for low power
consumption. This mode is enabled when the voltage
at pin BAT is above the low-power-mode threshold,
VSLP. During sleep mode, the bq2000T shuts down all
int e rn a l c i r c u i t s , d r i v e s t h e LED o u t p u t t o
high-impedance state, and drives pin MOD to low.
Restoring BAT below the VMCV threshold initiates the
IC and starts a fast-charge cycle.
11
bq2000T
Absolute Maximum Ratings
Minimum
Maximum
Unit
VCC
Symbol
VCC relative to VSS
-0.3
+7.0
V
VT
DC voltage applied on any pin, excluding VCC relative to VSS
-0.3
+7.0
V
TOPR
Operating ambient temperature
-20
+70
°C
TSTG
Storage temperature
-40
+125
°C
TSOLDER
Soldering temperature
-
+260
°C
Note:
Parameter
Notes
10s max.
Permanent device damage may occur if Absolute Maximum Ratings are exceeded. Functional operation should be limited to the Recommended DC Operating Conditions detailed in this data
sheet. Exposure to conditions beyond the operational limits for extended periods of time may affect device reliability.
DC Thresholds
(TA = TOPR; VCC = 5V ±20% unless otherwise specified)
Symbol
VTCO
VHTF
VLTF
Parameter
Temperature cutoff
High-temperature fault
Low-temperature fault
Rating
0.225 * VCC
0.25 * VCC
0.5 * VCC
Tolerance
±5%
±5%
±5%
Unit
V
V
V
VMCV
Maximum cell voltage
2.00
±0.75%
V
VLBAT
Minimum cell voltage
±5%
mV
VTHERM
TS input change for ∆T/∆t detection
950
VCC
−
161
±25%
V/Min
VSNSHI
50
±10
mV
Voltage at pin SNS
-50
±10
mV
Voltage at pin SNS
VSLP
High threshold at SNS, resulting in
MOD-low
Low threshold at SNS, resulting in
MOD-high
Sleep-mode input threshold
VCC - 1
±0.5
V
Applied to pin BAT
VRCH
Recharge threshold
VMCV - 0.1
±0.02
V
At pin BAT
VSNSLO
12
Notes
Voltage at pin TS
Voltage at pin TS
Voltage at pin TS
VBAT > VMCV inhibits
fast charge
Voltage at pin BAT
bq2000T
Recommended DC Operating Conditions (TA = TOPR)
Symbol
Condition
Minimum
Typical
Maximum
Unit
Notes
VCC
Supply voltage
4.0
5.0
6.0
V
ICC
Supply current
-
0.5
1
mA
Exclusive of external loads
ICCS
Sleep current
-
-
5
µA
VBAT = VSLP
VTS
Thermistor input
0.5
-
VCC
V
VTS < 0.5V prohibited
VOH
Output high
VCC - 0.2
-
-
V
MOD, IOH = 20mA
VOL
Output low
-
-
0.2
V
MOD, LED, IOL = 20mA
IOZ
High-impedance leakage
current
-
-
5
µA
LED
Isnk
Sink current
-
-
20
mA
MOD, LED
RMTO
Charge timer resistor
2
-
250
kΩ
CMTO
Charge timer capacitor
0.001
-
1.0
µF
Note:
All voltages relative to VSS except as noted.
Impedance
Symbol
Parameter
Minimum
Typical
Maximum
Unit
RBAT
Battery input impedance
10
-
-
MΩ
RTS
TS input impedance
10
-
-
MΩ
RSNS
SNS input impedance
10
-
-
MΩ
Minimum
Typical
Maximum
Unit
Timing
Symbol
(TA = TOPR; VCC = 5V ±20% unless otherwise specified)
Parameter
dMTO
MTO time-base variation
-5
-
+5
%
fTRKL
Pulse-trickle frequency
0.9
1.0
1.1
Hz
13
bq2000T
Data Sheet Revision History
Change No.
Note:
Page No.
Description
Nature of Change
Was: 14%
Is: 7%
1
5
Minimum current termination
1
3
Added state diagram
1
7
Changed capacitor value for en- Was: 0.13µF
abling top-off
Is: 0.26µF
1
8
Figure 8
Schematic updated
1
10
VTCO, VHTF, VLTF
Tolerance updated
2
9
Minimum current (for fast
charge termination)
Was: IMAX/7
Is: IMAX/14
3
2
Change Figure 1
Connection added between TS and ADC
and connection deleted between BAT and
ADC.
3
2
Change Figure 2
Battery temperature was: (checked at all
times)
Is: (sampled every 16 seconds for ∆T/∆t)
33
14
Change package
Was: 8-Pin TSSOP ∼ TS Package Suffix
Is: 8-Pin PSOP
13
13
Change Ordering Information
Was: TS = 8-pin TSSOP
Is: PW = 8-pin TSSOP
Change 1 = May 1999 B changes to Final from Jan. 1999 Preliminary data sheet.
Change 2 = February 2000 changes from May 1999 B.
Change 3 = February 2001 C changes from February 2000
Ordering Information
bq2000T
Package Option:
PN = 8-pin narrow plastic DIP
SN = 8-pin narrow SOIC
PW = 8-pin SSOP
Device:
bq2000T Multi-Chemistry Fast-Charge IC with ∆T/∆t Detection
14
bq2000T
8-Pin DIP (PN)
8-Pin PN (0.300" DIP)
Inches
D
E1
E
A
B1
A1
L
C
B
S
e
G
Millimeters
Dimension
A
Min.
Max.
Min.
Max.
0.160
0.180
4.06
4.57
A1
0.015
0.040
0.38
1.02
B
0.015
0.022
0.38
0.56
B1
0.055
0.065
1.40
1.65
C
0.008
0.013
0.20
0.33
D
0.350
0.380
8.89
9.65
E
0.300
0.325
7.62
8.26
E1
0.230
0.280
5.84
7.11
e
0.300
0.370
7.62
9.40
G
0.090
0.110
2.29
2.79
L
0.115
0.150
2.92
3.81
S
0.020
0.040
0.51
1.02
8-Pin SOIC Narrow (SN)
8-Pin SN (0.150" SOIC)
Inches
14
Millimeters
Dimension
A
Min.
Max.
Min.
Max.
0.060
0.070
1.52
1.78
A1
0.004
0.010
0.10
0.25
B
0.013
0.020
0.33
0.51
C
0.007
0.010
0.18
0.25
D
0.185
0.200
4.70
5.08
E
0.150
0.160
3.81
4.06
e
0.045
0.055
1.14
1.40
H
0.225
0.245
5.72
6.22
L
0.015
0.035
0.38
0.89
bq2000T
8-Pin PSOP
14 PINS SHOWN
15
PACKAGE OPTION ADDENDUM
www.ti.com
4-Mar-2005
PACKAGING INFORMATION
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
BQ2000TPN-B5
ACTIVE
PDIP
P
8
Lead/Ball Finish
50
Pb-Free
(RoHS)
CU SNPB
MSL Peak Temp (3)
Level-NC-NC-NC
BQ2000TPW
ACTIVE
TSSOP
PW
8
150
None
CU NIPDAU
Level-1-220C-UNLIM
BQ2000TPWR
ACTIVE
TSSOP
PW
8
2000
None
CU NIPDAU
Level-1-220C-UNLIM
BQ2000TSN-B5
ACTIVE
SOIC
D
8
75
None
CU SNPB
Level-1-220C-UNLIM
BQ2000TSN-B5TR
ACTIVE
SOIC
D
8
2500
None
CU SNPB
Level-1-220C-UNLIM
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional
product content details.
None: Not yet available Lead (Pb-Free).
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens,
including bromine (Br) or antimony (Sb) above 0.1% of total product weight.
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 1
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,
enhancements, improvements, and other changes to its products and services at any time and to discontinue
any product or service without notice. Customers should obtain the latest relevant information before placing
orders and should verify that such information is current and complete. All products are sold subject to TI’s terms
and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
their products and applications using TI components. To minimize the risks associated with customer products
and applications, customers should provide adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,
copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process
in which TI products or services are used. Information published by TI regarding third-party products or services
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.
Use of such information may require a license from a third party under the patents or other intellectual property
of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction
of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for
such altered documentation.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that
product or service voids all express and any implied warranties for the associated TI product or service and
is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Following are URLs where you can obtain information on other Texas Instruments products and application
solutions:
Products
Applications
Amplifiers
amplifier.ti.com
Audio
www.ti.com/audio
Data Converters
dataconverter.ti.com
Automotive
www.ti.com/automotive
DSP
dsp.ti.com
Broadband
www.ti.com/broadband
Interface
interface.ti.com
Digital Control
www.ti.com/digitalcontrol
Logic
logic.ti.com
Military
www.ti.com/military
Power Mgmt
power.ti.com
Optical Networking
www.ti.com/opticalnetwork
Microcontrollers
microcontroller.ti.com
Security
www.ti.com/security
Telephony
www.ti.com/telephony
Video & Imaging
www.ti.com/video
Wireless
www.ti.com/wireless
Mailing Address:
Texas Instruments
Post Office Box 655303 Dallas, Texas 75265
Copyright  2005, Texas Instruments Incorporated