LTC4052-42 [Linear Systems]
Lithium-Ion Battery Pulse Charger with Overcurrent Protection; 锂离子电池脉冲充电器具有过电流保护
| 型号： | LTC4052-42 |
| 厂家： | 
Linear Systems |
| 描述： | Lithium-Ion Battery Pulse Charger with Overcurrent Protection |
| 文件： | 总8页 (文件大小：162K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Final Electrical Specifications
LTC4052-4.2
Lithium-Ion Battery
Pulse Charger with
Overcurrent Protection
U
July 2002
FEATURES
DESCRIPTIO
■
Complete Standalone Pulse Charger for 1-Cell
The LTC®4052 is a complete standalone pulse charger
with integrated MOSFET for 1-cell lithium-ion batteries.
Lithium-Ion Batteries
■
Requires No Microcontroller
Internal 0.35Ω NMOS Switch
An external sense resistor provides maximum charge
current limiting as a safety precaution against a user
connecting a wall adapter with the incorrect or no current
limit. The internal MOSFET prevents reverse battery
current from flowing if the input voltage is shorted to
ground, eliminating the need for a blocking diode.
■
■
Sense Resistor Limits Maximum Current for Safety
■
Programmable Charge Termination Timer for
Maximum Capacity Charging
■
No Blocking Diode Required
■
1% Float Voltage Accuracy
As the battery accepts charge and approaches the
programmed float voltage, the internal MOSFET begins
switchingoffandonwiththedutycyclegraduallydecreas-
ing as the battery approaches a fully charged condition.
A programmable timer ends the charge cycle. The near
end-of-charge C/10 condition is indicated at the CHRG pin
when the average charge current falls to one-tenth of the
wallpack current. Removing the input voltage puts the
LTC4052 into a sleep mode, dropping the battery current
drain to less than 1µA (maximum).
■
Near End-of-Charge (C/10) Detection Output
■
Low Battery Drain when Input Supply Is Removed
■
Automatic Trickle Charge for Low Battery
Automatic Battery Refresh
Thermal Shutdown Protection
■
■
■
Small 8-Pin Thermally Enhanced MSOP Package
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APPLICATIO S
■
Standalone Lithium-Ion Battery Charger
■
Personal Information Appliances
The LTC4052 is available in a tiny 8-pin thermally
enhanced MSOP package.
■
Cellular Telephones
Cradle Chargers
■
, LTC and LT are registered trademarks of Linear Technology Corporation.
U
TYPICAL APPLICATIO
Single Cell 4.2V, 1A, Standalone Li-Ion Battery Charger
LTC4052 Charge Profile
V
= 4.5V TO 10V
WITH 1A
4.5
IN
CURRENT LIMIT
4.0
4.7Ω
1µF
10k
0.047µF
CHARGE
V
IN
1k
R
3.5
3.0
1.0
0.5
0
CYCLE
ENDS
SENSE
0.05Ω
1k
CONSTANT
CURRENT
PULSING
CURRENT
LTC4052
GATE
CHARGE STATUS
AC PRESENT
0.022µF
CHRG
SENSE
ACPR
C/10
BAT
5
1-CELL 4.2V
Li-Ion
BATTERY
TIMER
GND
0
2.5
0
0.5
1.0
1.5
2.0
3.0
C
TIMER
0.1µF
TIME (HOURS)
4052 TA01
4052 • TA01b
405242i
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
1
LTC4052-4.2
W W U W
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W
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ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
ORDER PART
Input Supply Voltage (VIN)....................................... 12V
BAT Voltage ...............................................–0.3V to 12V
GATE (Note 2) .............................................–0.3V to 8V
SENSE, TIMER..................................–0.3V to VIN +0.3V
CHRG, ACPR .............................................–0.3V to 12V
SENSE, BAT Peak Current ...................................... 1.5A
Operating Temperature Range (Note 3) .. –40°C to 85°C
Junction Temperature (Note 4)............................. 125°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
NUMBER
TOP VIEW
SENSE 1
ACPR 2
8 BAT
7 GATE
6 CHRG
5 TIMER
LTC4052EMS8E-4.2
V
3
4
IN
GND
MSE EXPOSED PAD PACKAGE
8-LEAD PLASTIC MSOP
MS8 PART MARKING
LTYY
TJMAX = 125°C, θJA = 35°C/W
EXPOSED PAD IS GROUND.
(MUST BE SOLDERED TO PCB).
Consult LTC Marketing for parts specified with wider operating temperature ranges.
DC ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 6V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
10
UNITS
V
V
Supply Voltage
Supply Current
Battery Float Voltage
Wall Adapter Open Circuit Voltage
Fast Charge Mode
●
●
4.5
IN
I
0.7
1.4
mA
IN
V
0°C ≤ T ≤ 85°C
4.158
4.137
4.200
4.200
4.242
4.242
V
V
BAT
A
●
V
Recharge Battery Voltage Threshold
Battery Voltage Falling 0°C ≤ T ≤ 85°C
3.990
3.969
4.050
4.050
4.110
4.110
V
V
RECHRG
A
●
●
●
●
●
V
V
V
– V Margin
RECHRG
75
90
150
105
24
225
120
34
mV
mV
mA
V
MARGIN
IMAX
BAT
Overcurrent Trip Voltage
Trickle Charge Current
I
V
V
= 2V
14
TRICKL
BAT
BAT
V
Trickle Charge Trip Threshold
Internal Switch On-Resistance
Rising
2.35
2.45
2.55
TRICKL
R
V
V
= 2.6V
= 4V
0.45
0.35
0.7
0.5
Ω
Ω
DS(ON)
BAT
BAT
V
GATE Pin Voltage
V
V
= 2.6V
= 4V
6.5
10.5
V
V
GATE
BAT
BAT
T
TIMER Period Accuracy
Battery Leakage Through Charger
Sleep Threshold
C
V
= 0.1µF, Fast Charge Mode
TIMER
±10
1
%
TIMER
I
= 4V, V = 0V
●
µA
LEAK
BAT
IN
V
(V – V ) Low to High
(V – V ) High to Low
20
0
45
15
70
mV
mV
SLEEP
IN
BAT
IN
BAT
V
ACPR Pin Output Low Voltage
ACPR Pin Leakage Current
I
= 3mA
●
●
●
●
0.5
0.8
1
V
µA
V
ACPR
ACPR
I
V
= 0, V
= 6V
LEAKACPR
IN
ACPR
V
CHRG Pin Output Low Voltage
CHRG Pin Leakage Current
CHRG Pin Pull-Down Current
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
I
= 3mA, Charging, C/10 Not Reached
0.5
0.8
1
CHRG
CHRG
I
I
V
V
= 0, V = 6V
CHRG
µA
µA
°C
°C
LEAKCHRG
CHRG
IN
= 1V, Charging, C/10 Reached
20
40
140
5
70
CHRG
T
SHDN
∆T
SHDN
405242i
2
LTC4052-4.2
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
Note 3: The LTC4052EMS8E-4.2 is guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
of a device may be impaired.
Note 2: Absolute Maximum Rating for GATE pin applies only to externally
applied voltage. During normal operation the LTC4052-4.2’s internal
charge pump can generate GATE pin voltage exceeding absolute
maximum but it is internally current limited.
Note 4: Junction temperature T is calculated from the ambient
J
temperature T and power dissipation P according to the following
A
D
formula: T = T + (P • θ °C/W)
J
A
D
JA
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PI FU CTIO S
SENSE (Pin 1): Overcurrent Sense Input. A sense resistor
(RSENSE) should be connected from VIN to the SENSE pin
to program the current limit level. When current limit is
tripped, the pass transistor immediately turns off and
below 10%, the N-MOSFET turns off and a weak 40µA
current source to ground turns on to indicate a near end-
of-charge C/10 condition. When a time-out occurs or the
input supply is removed, the CHRG pin becomes high
impedance.
turns back on after a 640ms time-out period (CTIMER
=
0.1µF). The on-off cycle will continue as long as the
overcurrent condition persists or until the timer runs out.
If overcurrent protection is not needed, short SENSE to
VIN.
GATE (Pin 7): Gate Drive Output Pin for Internal and
ExternalPassTransistors. AnexternalN-MOSFETtransis-
tor can be connected in parallel with the internal transistor
to reduce the on-resistance for higher charge current. In
this case, an external blocking diode is required to prevent
damage to the battery if VIN is shorted to ground. A 10µA
current source pulls this pin up to the charge pump
potential when turned on and a 40µA current source pulls
it down to ground to turn it off. If an overcurrent condition
is detected, the GATE pin is immediately pulled to ground.
The voltage at this pin is internally clamped to 12V above
the GND pin.
ACPR (Pin 2): Wall Adapter AC Present Open-Drain Out-
put. When the input voltage (wall adapter) is applied to the
LTC4052, this pin is pulled to ground by an internal
N-channel MOSFET capable of driving an LED.
VIN (Pin 3): Positive Input Supply Voltage (4.5V ≤ VIN ≤
10V). Bypass this pin with a 1µF capacitor in series with a
4.7Ω resistor.
GND (Pin 4): Electrical Ground Connection and provides
a thermal path from the IC to the PC board copper. Use
large copper pads and traces for maximum heat transfer.
A series RC network from the GATE to the VIN pin is
required to control the slew rate at the VIN pin when the
switch is turned on or off. The slew rate control prevents
excessive current from the capacitor located in the wall
adapter from flowing into the battery when the pass
transistor is turned on.
TIMER (Pin 5): Timer Set Pin. The timer period is set by a
capacitor (CTIMER) to ground. The timer period is:
tTIMER = (CTIMER • 3Hr)/(0.1µF). The minimum ON time,
minimumOFFtimeandtheovercurrenttime-outperiodall
BAT (Pin 8): Battery Sense Input Pin. This pin is clamped
to 4.7V if the battery is disconnected while charging. An
internal resistor divider presets the final float voltage to
4.2V. If the BAT pin drops below 4.05V after the charge
cycle has ended, the timer resets and a new charge cycle
begins.
scale with tTIMER
.
CHRG (Pin 6): Charge Status Open-Drain Output. When a
depleted battery is being charged, the CHRG pin is pulled
to ground by an internal N-channel MOSFET capable of
driving an LED. Once the duty cycle at the GATE pin drops
405242i
3
LTC4052-4.2
W
BLOCK DIAGRA
ACPR
2
45mV
105mV
+
–
+
–
V
3
+
–
+
–
V
IN
IN
SLEEP
I
MAX
100ms
FILTER
10mΩ
BAT
SENSE
1
4
24mA
GND
GATE
BAT
7
8
CHARGE
PUMP
TRIPLER
OSCILLATOR
TIMER
5
TRICKLE FAST
+
–
V
CLK
MIN
6
CHRG
+
–
V
STOP
C/10
RECHRG
LOGIC
+
40µA
TIMERS
+
–
V
FLOAT
+
–
V
TEMP
MAX
THERMAL
SHUTDOWN
1.23V
REFERENCE
1.23V
4052 BD
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OPERATIO
The LTC4052 is a complete lithium-ion battery pulse
charger with an internal 0.35Ω N-MOSFET switch driven
by an internal charge pump. The charge current is set by
the current limit of the input supply (wall adapter). An
external RSENSE sets the maximum allowable charge
overcurrent and prevents a wall adapter with the wrong
currentlimitfromdamagingthebattery. Ifthecurrentlimit
of the input supply is above IMAX, the charger will imme-
diately terminate charging and will retry after 640ms
(CTIMER = 0.1µF). If the battery is disconnected while in
fastchargemode,thechargepumpwillbeturnedoffwhen
thevoltageattheBATpinrisesabove4.7Vandturnedback
on when the voltage drops below the float voltage.
A charge cycle begins when the voltage at the VIN pin rises
abovetheBATpinby45mV. Thechargerwillgointotrickle
charge mode if the battery voltage is below 2.45V. The
trickle charge current is preset to 24mA and is provided by
an internal current source. In trickle mode, both the pass
transistor and charge pump are off.
405242i
4
LTC4052-4.2
U
OPERATIO
When the cell voltage exceeds 2.45V, the charger goes
into fast charge mode. In this mode, the charge pump
turns on and ramps up the gate voltage of the pass
transistor turning it on. The voltage at the VIN pin then
ramps down to VBAT plus the voltage drop across the pass
transistor and RSENSE, thus reducing the power dissipa-
tion in the pass transistor. The charge current is deter-
mined by the current limit of the input supply.
stay at 400ms. The voltage at the BAT pin will be slightly
higher than the final float voltage due to the ESR associ-
ated with the battery pack. This voltage level should not
turn on the overvoltage protection circuitry often located
in the battery pack. When the duty cycle at the GATE pin
drops below 10%, a comparator turns off the N-FET at the
CHRG pin and connects a weak current source (40µA) to
ground to indicate a near end-of-charge C/10 condition.
The pulse charging will continue until the timer stops.
When the battery voltage reaches the final float voltage,
the pass transistor turns off for 100ms (minimum off-
time). It remains off as long as the battery voltage stays
above the float voltage after the 100ms off-time. After the
minimum off-time, if the battery voltage drops below the
float voltage, the pass transistor turns back on for at least
400ms(minimumon-time).Asthebatteryapproachesfull
charge, the off-time will get longer and the on-time will
AnexternalcapacitorattheTIMERpinsetsthetotalcharge
time, the minimum on- and off-time and the overcurrent
retry period. After a time-out has occurred, the charge
cycle terminates and the CHRG pin is forced high imped-
ance. After the charging stops, if the battery voltage drops
below 4V, due to external loading or internal leakage, a
new charge cycle will automatically resume.
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APPLICATIO S I FOR ATIO
Input Voltage (Wall Adapter)
Battery Charge Current
The input voltage to the LTC4052 must have some
method of current limit capability. The current limit
level of the input power source must be lower than
the overcurrent limit (IMAX) set by the sense resistor
IMAX = 105mV/(RSENSE + 10mΩ). The 10mΩ represents
bond wire resistance internal to the IC. If a wall adapter
without current limit is used, or the current limit level is
above IMAX, the charger will turn on briefly and then
immediately turn off after the overcurrent condition is
detected. This cycle will be resumed every 640ms (CTIMER
=0.1µF)untilthetotalchargetimehasrunout.Ifovercurrent
protection is not needed, short the SENSE pin to VIN.
The battery charge current is determined by the current
limit of the input supply (wall adapter). However, this
current must not exceed the maximum charge current,
IMAX. If an overcurrent condition is detected, the charging
is immediately terminated, the GATE pin is pulled to
ground and the charge pump turns off. The charging will
resume after a 640ms time off (CTIMER = 0.1µF).
Programming the Timer
The programmable timer is used to terminate the charge
cycle and sets the minimum ON/OFF time and the
overcurrent time-off period. The length of the timer is
programmed by an external capacitor from the TIMER pin
to ground. The total charge time is:
Trickle Charge and Defective Battery Detection
At the beginning of the charge cycle, if the cell voltage is
low (less than 2.45V) the charger goes into a 24mA trickle
charge mode. If the low cell voltage persists for one
quarter of the total charge time, the battery is considered
defective and the charge cycle is terminated. The CHRG
pin output is then forced to a high impedance state.
Time (Hours) = (3 Hours)(CTIMER/0.1µF) or
C
TIMER = 0.1µF • Time (Hours)/3 (Hours)
The timer starts when the input voltage (at least 40mV
greater than VBAT) is applied. After a time-out has oc-
curred, the charging stops and the CHRG pin becomes
high impedance.
405242i
5
LTC4052-4.2
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APPLICATIO S I FOR ATIO
CHRG Status Output Pin
full charge. When the duty cycle falls below 10%, the
comparatortripsandturnsofftheN-MOSFETattheCHRG
pin and switches in a weak (40µA) current source to
ground. The 40µA turns off when the charge cycle termi-
nates. C/10 detection is disabled in trickle charge mode.
This open-drain output can report three different charger
conditions:
Charger Status
Not Charging
CHRG Pin Behavior
High Impedance
Internal Pass Transistor
Charging
Strong Pulldown
Charging, C/10 Reached
Weak 40µA Pulldown
AnN-channelMOSFET(0.35Ω)isincludedintheLTC4052
as the pass transistor. The gate of the MOSFET is
controlled by an internal charge pump. The body is
connected to ground instead of source terminal. There is
no body diode from the BAT pin back to the VIN pin;
therefore, no blocking diode is required in series with the
battery or the input supply. This will not only reduce cost
but also reduce the heat generated while in fast charge
mode. Aninternalthermalshutdowncircuitturnsthepass
transistor off when the die temperature exceeds approxi-
mately 140°C with 5°C of thermal hysteresis.
V
V
IN
DD
3
V
IN
620k
2k
MICROPROCESSOR
OUT
LTC4052
CHRG
6
IN
4052 F01
Figure 1. Interfacing with Microprocessor
Using a simple two-resistor network a microprocessor
can distinguish all three states. See Figure 1.
Gate Drive
The MOSFET gate drive consists of a regulated 10µA
current source charge pump. A series RC network is
required from the GATE pin to the VIN pin. When the
MOSFET is turned on, the voltage at the VIN pin will start
slewing down to a voltage equal to VBAT plus the voltage
drop across the pass transistor and RSENSE. The slew rate
is equal to 10µA/C. By ramping the VIN pin down slowly,
the inrush current is reduced. The resistor in series with
thecapacitorisrequiredtolimitthetransientcurrentwhen
the input supply is first applied.
When the LTC4052 is charging a battery, an internal N-
MOSFET pulls the CHRG pin to ground. When C/10 is
reached, the strong NMOS pulldown is replaced by a weak
40µA current source pulldown. When the LTC4052 is not
charging a battery, the CHRG pin is high impedance.
Using the network in Figure 1, the microprocessor can
determine charger state using the following procedure:
1. Forcethedigitaloutputpin, OUT, highandreadthelogic
valueatthedigitalinput,IN.IfINreadslow,achargercycle
is in progress.
When the charge pump is turned off, a 50µA current
source to ground will start pulling the GATE voltage down.
Once the pass transistor is off, the voltage at the VIN pin
will begin slewing up with the rate equal to 50µA/C. With
thisexternalcapacitor,thevoltageattheVIN pinisramping
at a controlled manner (Figure 2).
2. If the IN pin is high, force the OUT pin to be high
impedance, then read the logic level at the IN pin again. If
IN is low, the charge cycle is still in progress, the timer is
still running, but the charge current has dropped below
10% of the programmed value indicating that the charge
cycle is nearly complete.
For higher current applications an external power
N-channel MOSFET can be connected in parallel with the
internalpasstransistor. Becausethechargepumpoutputis
clamped to 12V above GND, the external MOSFET gate to
sourcebreakdownvoltageshouldberatedfor16Vormore.
3. IfthelogiclevelattheINpinishigh, thechargecyclehas
ended.
Near End-of-Charge C/10 Detection
The LTC4052 includes a comparator to monitor the duty
cycle at the GATE pin to detect when the battery is nearing
405242i
6
LTC4052-4.2
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APPLICATIO S I FOR ATIO
The power dissipated by the IC is:
10µA/C
50µA/C
V
P = (IBAT • IBAT • RDS(ON)) + (VIN • IIN)
= (1A • 1A • 0.35Ω) + (4V • 1mA)
= 0.35 + 0.004
IN
50µA/C
GATE
VOLTAGE
10µA/C
50µA/C
10µA/C
= 0.354W
4052 TA02
The LTC4052 is available in an enhanced 8-pin MSOP
package which features an exposed copper pad on the
bottom of the package allowing it to be soldered directly to
the PC board copper for maximum heat transfer. This
greatly reduces the thermal resistance and increases the
power handling capability when compared to a standard
MSOP package. The junction to aimbient thermal resis-
tance of this package is approximately 35°C/W depending
on the copper area. The junction temperature rise above
ambient will be approximately:
Figure 2. Slew Rate at GATE and V Pins
IN
with the RC Network from GATE to V
IN
Thermal Considerations
The power handling capability is limited by the maximum
rated junction temperature (125°C) and the amount of PC
board copper used as a heat sink. The power dissipated by
the device consists of two components:
1. Input supply current multiplied by the input voltage
(0.354W)(35°C/W) = 12.39°C
2. The voltage drop across the switch (SENSE pin to BAT
pin) multiplied by the charge current
The maximum junction temperature will be equal to the
maximum junction temperature rise above ambient plus
the maximum ambient temperature or:
The LTC4052 has internal thermal shutdown designed to
protect the IC from overtemperature conditions. For con-
tinuous charging in the fast charge mode, the maximum
junction temperature must not be exceeded. It is important
to give careful consideration to all sources of thermal
resistancefromjunctiontoambient.Additionalheatsources
mounted nearby must also be considered.
TJMAX = 85°C + 12.39°C = 97.39°C
ACPR Output Pin
When the input voltage is 45mV higher than the voltage at
the BAT pin, the ACPR pin is pulled to ground to indicate
that the input supply (wall adapter) is applied. After the
input supply is removed, this pin will become high imped-
ance. An internal 100ms filter prevents the LTC4052 from
turning off if the voltage at the VIN pin rings and gets too
close to VBAT due to parasitic inductance.
Surface mount packages rely primarily on the PC board
coppertodissipatetheheatgeneratedbythepackagetothe
surrounding air. Since the PC board copper is the heat sink,
generous amounts of copper surrounding the package are
recommendedtoincreasetheeffectivenessoftheheatsink.
In addition, feedthrough vias or plated through holes (lo-
cateddirectlybeneaththepackageandelsewhere)connect-
inginternalcopperandbacksidecopperlayershelptransfer
and spread the heat generated by the package.
Stop Charging
The charger is off when the voltage at the VIN pin is less
than 45mV above VBAT (sleep mode). The charge pump
and the internal pass transistor are turned off, and the
internal resistor divider is disconnected to reduce the
current drain on the battery in the sleep mode.
Calculating Junction Temperature
Example: Find the maximum junction temperature for a
battery voltage of 4V (V will collapse to around V in the
IN
BAT
fast charge mode), charge current of 1A and a maximum
ambient temperature of 75°C.
405242i
7
LTC4052-4.2
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TYPICAL APPLICATIO S
External N-MOSFET for Higher Charge Current
Minimum Component Count 4.2V Li-Ion Battery Charger
V
= 5V TO 10V WITH 2A CURRENT LIMIT
IN
V
IN
= 5V TO 10V WITH 600mA CURRENT LIMIT
MBRS120T3
3
3
10k
0.047µF
V
IN
LTC4052
SENSE
10k
0.047µF
4.7Ω
AC
V
IN
LTC4052
SENSE
R
1k
1k
SENSE
PRESENT
25mΩ
1µF
STATUS
1
7
8
1
7
8
6
2
CHARGE
STATUS
6
2
CHRG
ACPR
GATE
BAT
NC
NC
Si2302DS
CHRG
ACPR
GATE
BAT
0.022µF
0.022µF
1-CELL 4.2V
Li-Ion
BATTERY
TIMER
5
GND
TIMER
5
GND
1-CELL 4.2V
4
C
4
TIMER
0.1µF
600mA
C
TIMER
0.1µF
Li-Ion BATTERY
4052 TA04
4052 TA03
U
MS8E Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1662)
PACKAGE DESCRIPTIO
BOTTOM VIEW OF
EXPOSED PAD OPTION
2.06 ± 0.102
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
0.889 ± 0.127
(.035 ± .005)
2.794 ± 0.102
(.110 ± .004)
0.52
(.206)
REF
(.080 ± .004)
1
8
7 6
5
1.83 ± 0.102
(.072 ± .004)
RECOMMENDED SOLDER PAD LAYOUT
5.23
(.206)
MIN
3.2 – 3.45
(.126 – .136)
3.00 ± 0.102
(.118 ± .004)
NOTE 4
2.083 ± 0.102
(.082 ± .004)
4.88 ± 0.1
(.192 ± .004)
DETAIL “A”
0.254
(.010)
0° – 6° TYP
GAUGE PLANE
0.65
(.0256)
BSC
0.42 ± 0.04
1
2
3
4
(.0165 ± .0015)
8
TYP
0.53 ± 0.015
(.021 ± .006)
1.10
(.043)
MAX
0.86
(.34)
REF
DETAIL “A”
0.18
(.077)
NOTE:
SEATING
PLANE
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
0.22 – 0.38
(.009 – .015)
0.13 ± 0.05
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
(.005 ± .002)
0.65
(.0256)
BCS
MSOP (MS8E) 1001
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
RELATED PARTS
PART NUMBER DESCRIPTION
COMMENTS
LT1510-5
LTC1729
500kHz CC/CV Battery Charger
Termination Controller for Li-Ion
Most Compact, Up to 1.5A, Charges NiCd, NiMH, Li-Ion Cells
Time or Charge Current Termination, Automatic Charger/Battery
Detection Status Output, Preconditioning, 8-Lead MSOP
LTC1730
LTC1731
LTC1732
LTC1733
Li-Ion Battery Pulse Charger with Thermistor Interface
Li-Ion Battery Charger Controller
Battery Temperature Sensing, FAULT Output, SO-8 and SSOP-16 Packages
CC/CV Charges Li-Ion Cells, 8-Lead MSOP
Li-Ion Battery Charger Controller
CC/CV Charges Li-Ion Cells, Automatic Battery Detection, 10-Lead MSOP
Li-Ion Battery Charger with Thermal Regulation
Standalone Charger, Constant-Current/Constant-Voltage/
Constant-Temperature, Integrated MOSFET, No External Sense Resistor
or Blocking Diodes
LTC1734
LTC4050
ThinSOTTM Li-Ion Battery Charger
Only Two External Components, Up to 700mA I
Current Diode Required, No Sense Resistor Required
, No Reverse
CHARGE
Li-Ion Battery Charger Controller with Thermistor Interface Drives External MOSFET, 10-Lead MSOP
ThinSOT is a trademark of Linear Technology Corporation
405242i
LT/TP 0702 1.5K • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
8
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
LINEAR TECHNOLOGY CORPORATION 2001
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