bq2054
Lithium Ion Fast-Charge IC
Features
General Description
➤ Safe charge of Lithium Ion battery packs
The bq2054 Lithium Ion FastCharge IC is designed to optimize
charging of lithium ion (Li-Ion)
chemistry batteries. A flexible
pulse-width modulation regulator
allows the bq2054 to control voltage
and current during charging. The
regulator frequency is set by an external capacitor for design flexibility.
The switch-mode design keeps
power dissipation to a minimum.
➤ Voltage-regulated currentlimited charging
➤ Fast charge terminated by selectable minimum current; safety
backup termination on maximum
time
➤ Charging continuously qualified
by temperature and voltage limits
➤ Pulse-width modulation control
ideal for high-efficiency switchmode power conversion
The bq2054 measures battery temperature using an external thermistor for charge qualification. Charging
begins when power is applied or on
battery insertion.
➤ Direct LED control outputs display charge status and fault conditions
For safety, the bq2054 inhibits
charging until the battery voltage
and temperature are within con-
Pin Connections
Pin Names
TM
1
16
LED2/DSEL
ICTL
2
15
LED1
BAT
3
14
MOD
VCOMP
4
13
VCC
ICOMP
5
12
VSS
ITERM
6
11
LCOM
SNS
7
10
LED3
TS
8
9
TPWM
16-Pin Narrow
DIP or SOIC
figured limits. If the battery voltage
is less than the low-voltage threshold, the bq2054 provides low-current
conditioning of the battery.
A constant current-charging phase replenishes up to 70% of the charge capacity, and a voltage-regulated phase
returns the battery to full. The charge
cycle terminates when the charging
current falls below a user-selectable
current limit. For safety, charging terminates after maximum time and is
suspended if the temperature is outside the preconfigured limits.
The bq2054 provides status indications of all charger states and faults
for accurate determination of the
battery and charge system conditions.
TPWM
Regulator timebase input
LED3
Charge status output 3
LCOM
Common LED output
Battery voltage input
VSS
System ground
VCOMP
Voltage loop comp input
VCC
5.0V± 10% power
ICOMP
Current loop comp input
MOD
Modulation control output
ITERM
Minimum current
termination select input
LED1
Charge status output 1
SNS
Sense resistor input
LED2/
DSEL
Charge status output 2/
Display select input
TS
Temperature sense input
TM
Time-out programming
input
ICTL
Inrush current control
output
BAT
PN205401.eps
6/99 H
1
bq2054
TS
Pin Descriptions
TM
This input is used to monitor battery temperature. An external resistor divider network sets
the lower and upper temperature thresholds.
See Figure 6 and Equations 3 and 4.
Time-out programming input
This input sets the maximum charge time.
The resistor and capacitor values are determined using Equation 5. Figure 7 shows the
resistor/capacitor connection.
ICTL
TPWM
LCOM
Battery voltage input
MOD
LED1–
LED3
Voltage loop compensation input
Minimum current termination select
DSEL
Display select input
This three-level input controls the LED1–3
charge display modes. See Table 1.
Current loop compensation input
This input uses an external R-C network for
current loop stability.
SNS
Charger display status 1–3 outputs
These charger status output drivers are for
the direct drive of the LED display. Display
modes are shown in Table 1. These outputs are
tri-stated during initialization so that DSEL
can be read.
This three-state input is used to set IMIN for
fast charge termination. See Table 2.
ICOMP
Current-switching control output
MOD is a pulse-width modulated push/pull
output that is used to control the charging
current to the battery. MOD switches high
to enable current flow and low to inhibit current flow.
This input uses an external R-C network for
voltage loop stability.
ITERM
Common LED output
Common output for LED1–3. This output is
in a high-impedance state during initializ a t i o n t o r e a d programming input on
DSEL.
BAT is the battery voltage sense input. This
potential is generally developed using a
high-impedance resistor divider network
connected between the positive and the
negative terminals of the battery. See Figure 4 and Equation 1.
VCOMP
Regulation timebase input
This input uses an external timing capacitor
to ground to set the pulse-width modulation
(PWM) frequency. See Equation 7.
Inrush current control output
ICTL is driven low during the fault or
charge-complete states of the chip. It is used
to disconnect the capacitor across the battery
pack terminals, preventing inrush currents
from tripping overcurrent protection features in the pack when a new battery is inserted.
BAT
Temperature sense input
VCC
VCC supply
5.0V, ± 10% power
Charging current sense input
VSS
Battery current is sensed via the voltage developed on this pin by an external sense resistor, RSNS, connected in series with the
negative terminal of the battery pack. See
Equation 6.
2
Ground
bq2054
Thermal monitoring continues throughout the charge
cycle, and the bq2054 enters the Charge Pending state
when the temperature out of range. (There is one exception; if the bq2054 is in the Fault state—see below—the
out-of-range temperature is not recognized until the
bq2054 leaves the Fault state.) All timers are suspended (but not reset) while the bq2054 is in Charge
Pending. When the temperature comes back into range,
the bq2054 returns to the point in the charge cycle
where the out-of-range temperature was detected.
Charge Algorithm
The bq2054 uses a two-phase fast charge algorithm. In
phase 1, the bq2054 regulates constant current (ISNS =
IMAX) until VCELL (= VBAT - VSNS) rises to VREG. The
bq2054 then transitions to phase 2 and regulates constant voltage (VCELL = VREG) until the charging current
falls below the programmed IMIN threshold. The charging current must remain below IMIN for 120 ± 40ms before a valid fast charge termination is detected. Fast
charge then terminates, and the bq2054 enters the
Charge Complete state. See Figures 1 and 2.
When the temperature is valid, the bq2054 then regulates current to ICOND (=IMAX/5). After an initial holdoff
period tHO (which prevents the chip from reacting to
transient voltage spikes that may occur when charge
current is first applied), the chip begins monitoring
VCELL. If VCELL does not rise to at least VMIN before the
expiration of time-out limit tMTO (e.g. the cell has failed
short), the bq2054 enters the Fault state. If VMIN is
achieved before expiration of the time limit, the chip begins fast charging.
Charge Qualification
The bq2054 starts a charge cycle when power is applied
while a battery is present or when a battery is inserted.
Figure 2 shows the state diagram for pre-charge qualification and temperature monitoring. The bq2054 first
checks that the battery temperature is within the allowed, user-configurable range. If the temperature is out
of range, the bq2054 enters the Charge Pending state
and waits until the battery temperature is within the allowed range. Charge Pending is enunciated by LED3
flashing.
Once in the Fault state, the bq2054 waits until VCC is
cycled or a new battery insertion is detected. It then
starts a new charge cycle and begins the qualification
process again.
Current
IMAX
Qualification
VREG
Voltage
Fast
Charge
Phase 1
VMIN
Phase 2
Voltage
ICOND
Current
IMIN
Time
GR205401.eps
Figure 1. bq2054 Charge Algorithm
3
bq2054
Chip On
VCC
4.5V
Temperature Out
of Range or
Thermistor Absent
Temperature
Checks On
Present
VLCO < VBAT < VHCO
Temperature
in Range
Qualification Test
Battery
Status?
Absent
VBAT < VLCO or
VBAT > VHCO
VBAT < VMIN
Current
Regulation
@ ICOND
Fail: t = tQT or
VBAT < VLCO
VBAT > VHCO
Fault
LED3 =1
MOD = 0
PASS: VBAT > VMIN
VBAT
VBAT
Phase 1
I = IMAX
VBAT < VREG
Fast
Charge
VBAT > VREG
Phase 2
V = VREG
ISNS > IMIN
ISNS < IMIN
or
t > tMTO
VBAT
VLCO
VLCO
or
t > t > tMTO or
VBAT < VLCO or
VBAT > VHCO
VBAT < VLCO or
VBAT > VHCO
VHCO
Charge
Pending
LED3 flash
MOD = 0
Temperature Out
of Range or
Thermistor Absent
Temperature In
Range, Return
to Original State
Charge
Complete
or
VBAT
VHCO
FG205401.eps
Figure 2. bq2054 State Diagram
4
bq2054
Charge Status Display
Configuring the Display Mode and IMIN
Charge status is enunciated by the LED driver outputs
LED1–LED3. Three display modes are available in the
bq2054; the user selects a display mode by configuring
pin DSEL. Table 1 shows the three display modes.
DSEL/LED2 is a bi-directional pin with two functions; it
is an LED driver pin as an output and a programming
pin as an input. The selection of pull-up, pull-down, or
no pull resistor programs the display mode on DSEL per
Table 1. The bq2054 latches the programming data
sensed on the DSEL input when any one of the following
three events occurs:
The bq2054 does not distinguish between an overvoltage fault and a “battery absent” condition. The
bq2054 enters the Fault state, enunciated by turning on
LED3, whenever the battery is absent. The bq2054,
therefore, gives an indication that the charger is on even
when no battery is in place to be charged.
1.
VCC rises to a valid level.
2.
The bq2054 leaves the Fault state.
3.
The bq2054 detects battery insertion.
The LEDs go blank for approximately 750ms (typical)
while new programming data is latched.
Table 1. bq2054 Display Output Summary
Mode
DSEL = 0
(Mode 1)
DSEL = 1
(Mode 2)
DSEL = Float
(Mode 3)
Note:
Charge Action State
LED1
LED2
LED3
Battery absent or over-voltage fault
Low
Low
High
Pre-charge qualification
Flash
Low
Low
Fast charging
High
Low
Low
Charge complete
Low
High
Low
Charge pending (temperature out of range)
X
X
Flash
Charging fault
X
X
High
Battery absent or over-voltage fault
Low
Low
High
Pre-charge qualification
High
High
Low
Fast charge
Low
High
Low
Charge complete
High
Low
Low
Charge pending (temperature out of range)
X
X
Flash
Charging fault
X
X
High
Battery absent or over-voltage fault
Low
Low
High
Pre-charge qualification
Flash
Flash
Low
Fast charge: current regulation
Low
High
Low
Fast charge: voltage regulation
High
High
Low
Charge complete
High
Low
Low
Charge pending (temperature out of range)
X
X
Flash
Charging fault
X
X
High
1 = VCC; 0 = VSS; X = LED state when fault occurred; Flash = 1 6 sec. low, 1 6 sec high.
5
bq2054
Fast charge terminates when the charging current drops
below a minimum current threshold programmed by the
value of ITERM (see Table 2) and remains below that
level for 120 ± 40ms.
These parameters are typically specified by the battery
manufacturer. The total resistance presented across the
battery pack by RB1 + RB2 should be between 150kΩ
and 1MΩ. The minimum value ensures that the divider
network does not drain the battery excessively when the
power source is disconnected. Exceeding the maximum
value increases the noise susceptibility of the BAT pin.
Table 2. IMIN Termination Thresholds
ITERM
IMIN
0
IMAX/10
The current sense resistor, RSNS (see Figure 5), determines the fast charge current. The value of RSNS is
given by the following:
1
IMAX/20
Equation 2
Float
IMAX/30
I MAX =
Figure 3 shows the bq2054 configured for display mode 2
and IMIN = IMAX/10.
where:
n
Voltage and Current Monitoring
Both VHCO and IMIN terminations are ignored during
the first 1.33 ± 0.19 seconds of both the Charge Qualification and Fast Charge phases. This condition prevents
premature termination due to voltage spikes that may
occur when charge is first applied.
The resistor values are calculated from the following:
Equation 1
RB1 N * VREG
=
−1
RB2
205
. V
where:
N = Number of cells in series
n
VREG = Desired fast-charging voltage per cell
IMAX = Desired maximum charge current
Hold-Off Period
The bq2054 monitors battery pack voltage at the BAT
pin. The user must implement a voltage divider between the positive and negative terminals of the battery
pack to present a scaled battery pack voltage to the BAT
pin. The bq2054 also uses the voltage across a sense resistor (RSNS) between the negative terminal of the battery pack and ground to monitor the current into the
pack. See Figure 4 for the configuration of this network.
n
0.250 V
R SNS
6
bq2054
VCC
LED2/DSEL
LED1
10K
1K
16
15
1K
VCC
VSS
6
LCOM
LED3
13
12
11
1K
10
bq2054
VSS
FG205402.eps
Figure 3. Configured Display Mode/IMIN Threshold
VCC
BAT +
RB1
BAT
13
12
3
VCC
RB2
VSS
SNS
bq2054
7
BAT RSNS
VSS
FG205403.eps
Figure 4. Configuring the Battery Divider
7
bq2054
Battery Insertion and Removal
Temperature Monitoring
VCELL is interpreted by the bq2054 to detect the presence or absence of a battery. The bq2054 determines
that a battery is present when V CELL is between the
High-Voltage Cutoff (V HCO = V REG + 0.25V) and
the Low-Voltage Cutoff (VLCO = 0.8V). When VCELL is
outside this range, the bq2054 determines that no battery is present and transitions to the Fault state. Transitions into and out of the range between VLCO and VHCO
are treated as battery insertions and removals, respectively. The VHCO limit also implicitly serves as an overvoltage charge termination.
The bq2054 monitors temperature by examining the
voltage presented between the TS and SNS pins by a resistor network that includes a Negative Temperature
Coefficient (NTC) thermistor. Resistance variations
around that value are interpreted as being proportional
to the battery temperature (see Figure 6).
The temperature thresholds used by the bq2054 and
their corresponding TS pin voltage are:
n
Inrush Current Control
n
Whenever the bq2054 is in the fault or charge-complete
state, the ICTL output is driven low. This output can be
used to disconnect the capacitor usually present in the
charger across the positive and negative battery terminals, preventing the cap from supplying large inrush
currents to a newly inserted battery. Such inrush currents may trip the overcurrent protection circuitry usually present in Li-Ion battery packs.
n
TCO (Temperature Cutoff): Higher limit of the temperature range in which charging is allowed. VTCO =
0.4 * VCC
HTF (High-Temperature Fault): Threshold to which
temperature must drop after temperature cutoff is
exceeded before charging can begin again. VHTF =
0.44 * VCC
LTF (Low-Temperature Fault): Lower limit of the
temperature range in which charging is allowed.
VLTF = 0.6 * VCC
VCC
VCC
RT1
VCC
RT2
VSS
SNS
TS
7
NTC
Thermistor
RT
˚t
VLTF = 0.6VCC
VHTF = 0.44VCC
VTCO = 0.4VCC
LTF
HTF
TCO
BAT -
8
RSNS
VSS
Hotter
VSS
Figure 5. Configuring
Temperature Sensing
Figure 6. Voltage Equivalent
of Temperature
8
Temperature
12
Voltage
bq2054
13
Colder
bq2054
A resistor-divider network can be implemented that
presents the defined voltage levels to the TS pin at the
desired temperatures (see Figure 6).
VCC
R
The equations for determining RT1 and RT2 are:
1
Equation 3
0.6 * VCC
(VCC − 0.250 )
=
RT1 * (RT2 + R LTF )
1+
(RT2 * R LTF )
TM
C
VCC
VSS
Equation 4
0.44 =
1+
1
RT1 * (RT2 + R HTF )
(RT2 * R HTF )
13
12
bq2054
where:
VSS
n
RLTF = thermistor resistance at LTF
n
RHTF = thermistor resistance at HTF
FG205406.eps
Figure 7. R-C Network for Setting MTO
TCO is determined by the values of RT1 and RT2. 1%
resistors are recommended.
Disabling Temperature Sensing
Charge Regulation
Temperature sensing can be disabled by placing 10kΩ
resistors between TS and SNS and between SNS and
VCC.
The bq2054 controls charging through pulse-width
modulation of the MOD output pin, supporting both
constant-current and constant-voltage regulation.
Charge current is monitored at the SNS pin, and charge
voltage is monitored at the BAT pin. These voltages are
compared to an internal reference, and the MOD output
modulated to maintain the desired value.
Maximum Time-Out
MTO is programmed from 1 to 24 hours by an R-C network on the TM pin (see Figure 7) per the equation:
Voltage at the SNS pin is determined by the value of resistor RSNS, so nominal regulated current is set by:
Equation 5
Equation 6
tMTO = 0.5 * R * C
IMAX = 0.250V/RSNS
Where R is in kΩ and C is in µF, tMTO is in hours. The
maximum value for C (0.1µF) is typically used.
The switching frequency of the MOD output is determined by an external capacitor (CPWM) between the
pin TPWM and ground, per the following:
The MTO timer is reset at the beginning of fast charge
and when fast charge transitions from the current regulated to the voltage regulated mode. If MTO expires during the current regulated phase, the bq2054 enters the
Fault state and terminates charge. If the MTO timer expires during the voltage regulated phase, fast charging
terminates and the bq2054 enters the Charge Complete
state.
Equation 7
FPWM = 0.1/CPWM
Where C is in µF and F is in kHz. A typical switching
rate is 100kHz, implying CPWM = 0.001µF. MOD pulse
width is modulated between 0 and 90% of the switching
period.
The MTO timer is suspended (but not reset) during the
out-of-range temperature (Charge Pending) state.
To prevent oscillation in the voltage and current control
loops, frequency compensation networks (C or R-C) are typically required on the VCOMP and ICOMP pins (respectively).
9
bq2054
Absolute Maximum Ratings
Symbol
Parameter
Minimum
Maximum
Unit
VCC
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
-55
+125
°C
TSOLDER
Soldering temperature
-
+260
°C
Note:
Notes
Commercial
10 sec. 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.
10
bq2054
DC Thresholds
Symbol
(TA = TOPR; VCC = 5V ± 10%)
Parameter
Rating
Unit
Tolerance
Notes
Internal reference voltage
2.05
V
1%
Temperature coefficient
-0.5
mV/°C
10%
VLTF
TS maximum threshold
0.6 * VCC
V
± 0.03V
Low-temperature fault
VHTF
TS hysteresis threshold
0.44 * VCC
V
± 0.03V
High-temperature fault
VTCO
TS minimum threshold
0.4 * VCC
V
± 0.03V
Temperature cutoff
VHCO
High cutoff voltage
2.3V
V
1%
VMIN
Under-voltage threshold at BAT
0.2 * VCC
V
± 0.03V
VLCO
Low cutoff voltage
0.8
V
± 0.03V
0.250
V
10%
IMAX
VSNS
Current sense at SNS
0.050
V
10%
ICOND
TA = 25°C
VREF
11
bq2054
Recommended DC Operating Conditions (TA = TOPR)
Symbol
Parameter
VCC
Supply voltage
VTEMP
Minimum
Typical Maximum
Unit
Notes
4.5
5.0
5.5
V
Temperature sense voltage
0
-
VCC
V
VTS - VSNS
VCELL
Per cell battery voltage input
0
-
VCC
V
VBAT - VSNS
ICC
Supply current
-
2
4
mA
Outputs unloaded
DSEL tri-state open detection
-2
-
2
µA
Note 2
ITERM tri-state open detection
-2
2
µA
IIZ
VIH
Logic input high
VCC-0.3
-
-
V
DSEL, ITERM
VIL
Logic input low
-
-
VSS+0.3
V
DSEL, ITERM
LED1-3, ICTL, output high
VCC-0.8
-
-
V
IOH ≤ 10mA
MOD output high
VCC-0.8
-
-
V
IOH ≤ 10mA
LED1-3, ICTL, output low
-
-
VSS+0.8V
V
IOL ≤ 10mA
MOD output low
-
-
VSS+0.8V
V
IOL ≤ 10mA
LCOM output low
-
-
VSS+0.5
V
IOL ≤ 30mA
LED1-3, ICTL, source
-10
-
-
mA
VOH =VCC-0.5V
MOD source
-5.0
-
-
mA
VOH =VCC-0.5V
LED1-3, ICTL, sink
10
-
-
mA
VOL = VSS+0.5V
MOD sink
5
-
-
mA
VOL = VSS+0.8V
LCOM sink
30
-
-
mA
VOL = VSS+0.5V
DSEL logic input low source
-
-
+30
µA
V = VSS to VSS+ 0.3V, Note 2
ITERM logic input low source
-
-
+70
µA
V = VSS to VSS+ 0.3V
DSEL logic input high source
-30
-
-
µA
V = VCC - 0.3V to VCC
ITERM logic input high source
-70
-
-
µA
V = VCC - 0.3V to VCC
VOH
VOL
IOH
IOL
IIL
IIH
Notes:
1. All voltages relative to VSS except where noted.
2. Conditions during initialization after VCC applied.
12
bq2054
Impedance
Symbol
Parameter
Minimum
Typical
Maximum
Unit
Notes
RBATZ
BAT pin input impedance
50
-
-
MΩ
RSNSZ
SNS pin input impedance
50
-
-
MΩ
RTSZ
TS pin input impedance
50
-
-
MΩ
RPROG1
Soft-programmed pull-up or pull-down
resistor value (for programming)
-
-
10
kΩ
DSEL
RPROG2
Pull-up or pull-down resistor value
-
-
3
kΩ
ITERM
RMTO
Charge timer resistor
20
-
480
kΩ
Timing
(TA = TOPR; VCC = 5V ± 10%)
Symbol
Parameter
Minimum
Typical
Maximum
Unit
Notes
See Figure 7
tMTO
Charge time-out range
1
-
24
hours
tQT
Pre-charge qual test time-out period
-
tMTO
-
-
tHO
Termination hold-off period
1.14
-
1.52
sec.
tIMIN
Min. current detect filter period
80
160
msec.
FPWM
PWM regulator frequency range
-
100
kHz
CPWM = 0.001µF
(equation 7)
Capacitance
Symbol
Parameter
Minimum
Typical
Maximum
Unit
CMTO
Charge timer capacitor
-
-
0.1
µF
CPWM
PWM R-C capacitance
-
0.001
-
µF
13
bq2054
16-Pin DIP Narrow (PN)
16-Pin PN (0.300" DIP)
Inches
Millimeters
Dimension
Min.
Max.
Min.
Max.
A
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
0.740
0.770
18.80
19.56
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
16-Pin SOIC Narrow (SN)
16-Pin SN (0.150" SOIC)
Inches
D
e
B
E
H
A
C
A1
.004
L
14
Millimeters
Dimension
Min.
Max.
Min.
Max.
A
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
0.385
0.400
9.78
10.16
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
bq2054
Data Sheet Revision History
Change No. Page No.
1
Description
Nature of Change
5, 7, 8, 10 Value Change
2
5, 10
3
Changed VSNS and IMAX
Value Change
Changed VREF
10
Coefficient Addition
Temperature coefficient added
4
5
New state diagram
Diagram inserted
4
1, 2, 8, 12
4
3, 5, 13
5
11
VHCO Rating changed to 2.3V
VHCO Tolerance changed to 1%
Changed values for VHCO
6
13
tQT in Timing Specifications
tQT changed from (0.16 ∗ tMTO) to tMTO
7
5
ITERM in Table 2
Z changes to Float
7
8
Figure 6
RB1 and RB2 changed to RT1 and RT2
8
10
TOPR
Deleted industrial temperature range.
Notes:
NC pin replaced with ICTL
Termination hold-off period added
IMIN detect filtering added
Change 3 = April 1996 C changes from Dec. 1995 B.
Change 4 = Sept. 1996 D changes from April 1996 C.
Change 5 = Nov. 1996 E changes from Sept. 1996 D.
Change 6 = Oct. 1997 F changes from Nov. 1996 E.
Change 7 = Oct. 1997 G changes from Oct. 1997 F.
Change 8 = June 1999 H changes from Oct. 1997 G.
Ordering Information
bq2054
Package Option:
PN = 16-pin plastic DIP
SN = 16-pin narrow SOIC
Device:
bq2054 Li-Ion Fast-Charge IC
15
PACKAGE OPTION ADDENDUM
www.ti.com
14-Oct-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
BQ2054PN
ACTIVE
PDIP
N
16
25
RoHS & Green
NIPDAU
N / A for Pkg Type
-20 to 70
2054PN-G
Samples
BQ2054SN
ACTIVE
SOIC
D
16
40
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-20 to 70
2054
(-G, G)
Samples
BQ2054SNTR
ACTIVE
SOIC
D
16
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-20 to 70
2054
(-G, G)
Samples
(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)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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