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LM3658
Stat2
Stat1
Iset
Ts
BATT
1 PFBattery
Pack
GND
USB_sel
EN_b
1 PF
1 PF
CHG_IN
4.5V to 6V
USBpwr
4.5V to 6V
+
LM3658
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SNVS328E –MAY 2005–REVISED MARCH 2007
LM3658 Dual Source USB/AC Li Chemistry Charger IC for Portable Applications
Check for Samples: LM3658
1FEATURES DESCRIPTION
The LM3658 is a single chip charger IC designed for
2• Integrated Power FETs with Thermal handheld applications. It can safely charge and
Regulation maintain a single cell Li-Ion/Polymer battery operating
• Charges from Either an AC Wall Adapter or from an AC wall adapter or USB power source. Input
USB Power Source with Automatic Source power source selection of USB/AC is automatic. With
Selection both power sources present, the AC power source
has priority. Charge current is programmed through
• 50 mA to 1000 mA Charge Currents Using AC an external resistor when operating from an AC wall
Wall Adapter adapter allowing charge currents from 50 mA to 1000
• Pin-Selectable USB Charge Currents of 100 mA. When the battery is charged using USB power,
mA or 500 mA charge currents of 100 mA or 500 mA are pin-
• LDO Mode with 1A of Source Current is selectable. The termination voltage is controlled to
within ±0.35% of 4.2V.
Automatically Invoked When the Battery is
Absent and the AC Wall Adapter is Connected The LM3658 requires few external components and
• Continuous Battery Temperature Monitoring integrates internal power FETs, reverse current
protection and current sensing. The internal power
• Built-in Multiple Safety Timers FETs are thermally regulated to obtain the most
• Charge Status Indication efficient charging rate for a given ambient
• Continuous Over-current and Temperature temperature.
Protection The LM3658 operates in five modes: pre-qualification
• Near-depleted Battery Pre-conditioning mode, constant-current mode, constant-voltage
• Sleep Mode with Ultra Low Quiescent Current mode, top-off mode and maintenance mode.
Additionally, the charger IC operates as a linear
• On-board Kelvin-sensing Achieves ±0.35% regulator in “LDO mode”, when the AC wall adapter is
Termination Accuracy connected and no battery is present. Optimal battery
• Maintenance Mode with Automatic Recharge management is obtained through thermal regulation,
• Thermally Enhanced 3 mm x 3 mm WSON battery temperature measurement and multiple safety
timers. The LM3658 provides two open-drain outputs
Package for LED status indication or connection to GPIOs.
APPLICATIONS Typical Application
• Smartphones
• Digital Still Cameras
• PDAs
• Hard Drive and Flash-based MP3 Players
• USB-powered Devices
1Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Copyright © 2005–2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Top View Bottom View
Die-Attach
Pad (DAP)
GND
Die-Attach
Pad (DAP)
GND
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3
4
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LM3658
SNVS328E –MAY 2005–REVISED MARCH 2007
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Connection Diagram and Package Mark Information
Figure 1. WSON10 Package Drawing
Pin Descriptions
Pin # Name Description
1 CHG_IN AC wall adapter input pin.
2 USBpwr USB power input pin.
3 GND Power and signal ground pin.
4 USB_sel Pulling this pin low limits the USB charge current to 100 mA. Pulling this pin high limits the USB charge current to
500 mA.
5 EN_b Pulling this pin low enables the charger. Pulling this pin high disables the charger.
6 STAT2 Active low open-drain output. Indicates charger status. This pin is capable of driving an LED as well as GPIOs.
See Operation Description section for more detail.
7 STAT1 Active low open-drain output. Indicates charger status. This pin is capable of driving an LED as well as GPIO. See
Operation Description section for more detail.
8 ISET A resistor is connected between this pin and GND. The resistor value determines the full-rate charge current when
using the AC source.
9 TSBattery temperature sense pin. This pin must be connected to battery pack’s temperature sense output pin.
For the LM3658SD-B version, leaving this pin open indicates that the battery pack is not present. The charger IC
will invoke LDO mode if this pin is left floating. See Operation Description section for more detail.
10 BATT Positive battery terminal connection.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
ABSOLUTE MAXIMUM RATINGS (1)(2)(3)
CHG_IN, USBpwr (VCC)−0.3V to +6.5V
All other pins except GND −0.3V to CHG_IN or USBpwr
Power Dissipation (4) Internally Limited
Junction Temperature (TJ-MAX) +150°C
Storage Temperature Range −65°C to +150°C
ESD Rating (5) Human Body Model: 2.0 kV
Machine Model: 200V
(1) All voltages are with respect to the potential at the GND pin.
(2) Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under
which operation of the device is specified. Operating Ratings do not imply specified performance limits. For specified performance limits
and associated test conditions, see the Electrical Characteristics tables.
(3) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(4) The LM3658 has built-in thermal regulation to regulate the die temperature to 120ºC. See Operation Description section for more detail.
(5) The Human body model is a 100 pF capacitor discharged through a 1.5 kΩresistor into each pin. The machine model is a 200 pF
capacitor discharged directly into each pin. MIL-STD-883 3015.7
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OPERATING RATINGS (1)(2)
Input Voltage Range for CHG_IN 4.5V to 6.0V
Input Voltage Range for USB_pwr 4.35V to 6.0V
Recommended Load Current 0 to 1000 mA
Power Dissipation(3) Internally Limited
Junction Temperature (TJ) Range −40°C to +125°C
Ambient Temperature (TA) Range −40°C to +85°C
(1) Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under
which operation of the device is specified. Operating Ratings do not imply specified performance limits. For specified performance limits
and associated test conditions, see the Electrical Characteristics tables.
(2) All voltages are with respect to the potential at the GND pin.
(3) The LM3658 has built-in thermal regulation to regulate the die temperature to 120ºC. See Operation Description section for more detail.
THERMAL PROPERTIES
θJA, Junction-to-Ambient Thermal Resistance (1) 54°C/W
(1) Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power
dissipation exists, special care must be paid to thermal dissipation issues in board design. Please refer to application note AN-1187
(SNOA401) for more detail.
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, VCC (VCHG_IN and/or VUSBpwr) = 5V, VBATT = 3.5V. CCHG_IN = 1 µF, CUSBpwr = 1 µF, CBATT = 1 µF. Typical
values and limits appearing in normal type apply for TJ= 25°C. Limits appearing in boldface type apply over TJ= 0°C to
+85°C. (1)(2)(3)
Symbol Parameter Conditions Min Typ Max Units
CHARGER
VCHG_IN AC Wall Adapter Input Voltage 4.5 6.0 V
Range
VUSBpwr USB Input Voltage Range 4.35 6.0 V
ICC_PD Quiescent Current in Power VBATT > VCC–VOK_CHG 15µA
Down Mode
ICC_STBY Quiescent Current in Standby VBATT < VCC −VOK_CHG
Mode VCC > VPOR 400 600 µA
EN_b = High
IBATT_PD Battery Leakage Current in VBATT > VCC + VOK_CHG 0.01 2.0 µA
Power Down Mode
IBATT_MAI Battery Leakage Current in STAT1 = off, STAT2 = on, adapter or USB 715 µA
NT Maintenance Mode connected, VBATT = 4.2V
VOK_CHG CHG_IN or USBpwr OK Trip- VCC – VBATT (Rising) 200 mV
Point VCC – VBATT (Falling) 50
VPOR VCC POR Trip-Point VCC (Rising)
VBATT < VCC – VOK_CHG 3.0 V
VFULL_RATE < VBATT < VTERM
VTERM Battery Charge Termination ICHG = 10% of its value when VBATT = 3.5V 4.2 V
Voltage
Battery Charge Termination TA= 25°C −0.35 +0.35 %
Voltage Tolerance TA= 0°C to 85°C −1.5 +1.5
VCHG_DO CHG_IN Drop-Out Voltage VBATT = VTERM, ICHG = 1A 500 mV
VCC > VBATT + VCHG_DO_MAX
VUSB_DO USBpwr Drop-Out Voltage VBATT = VTERM, USB_sel = high 250 mV
VCC > VBATT + VUSB_DO_MAX
(1) All voltages are with respect to the potential at the GND pin.
(2) Min and Max limits are specified by design, test, or statistical analysis. Typical numbers are not specified, but do represent the most
likely norm.
(3) LM3658 is not intended as a Li-Ion battery protection device; battery used in this application should have an adequate internal
protection.
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ELECTRICAL CHARACTERISTICS (continued)
Unless otherwise noted, VCC (VCHG_IN and/or VUSBpwr) = 5V, VBATT = 3.5V. CCHG_IN = 1 µF, CUSBpwr = 1 µF, CBATT = 1 µF. Typical
values and limits appearing in normal type apply for TJ= 25°C. Limits appearing in boldface type apply over TJ= 0°C to
+85°C. (1)(2)(3)
Symbol Parameter Conditions Min Typ Max Units
ICHG CHG_IN Full-Rate Charge 6V ≥VCC ≥4.5V
Current Range (see full-rate VBATT < VCC – VOK_CHG 50 1000 mA
charge mode description) VFULL_RATE < VBATT < VTERM
ICHG = KISET/RISET
ICHG CHG_IN Full Rate Charge RISET = 10kΩ220 245 270
Current RISET = 5 kΩ465 500 535 mA
RISET = 3.3kΩ700 760 820
KISET Charge Current Set Coefficient 6V ≥VCC ≥4.5V
ICHG = KISET/RISET (see full-rate VBATT < VCC – VOK_CHG 2500 AΩ
charge mode description) VFULL_RATE < VBATT < VTERM
VISET Charge Current Set Voltage 6V ≥VCC ≥4.5V
VBATT < VCC – VOK_CHG 2.5 V
VFULL_RATE < VBATT < VTERM
IUSB_L USB Full-Rate Charge Low 80 90 100 mA
Current
IUSB_H USB Full-Rate Charge High 400 450 500 mA
Current
IPREQUAL Pre-Qualification Current VBATT = 2V, for both AC adapter and USB 35 45 55 mA
VFULL_RA Full-Rate Qualification VBATT rising, transition from pre-qualification to full- 2.9 3.0 3.1 V
TE Threshold rate charging
Full Rate Hysteresis VBATT falling 50 60 70 mV
IEOC End-of-Charge Current, Percent 6V ≥VCC ≥4.5V
from Full-Range Current VBATT < VCC – VOK_CHG 7911 %
VFULL_RATE < VBATT < VTERM
ITOPOFF Minimum Top-Off Charge 6V ≥VCC ≥4.5V
Current VBATT < VCC – VOK_CHG 1.25 2.5 3.75 %
VBATT = VTERM
VRESTART Restart Threshold Voltage VBATT falling, transition from EOC to pre- 3.94 4.0 4.07 V
qualification mode
VTL Battery Temperature Sense
Comparator Low-Voltage 0.46 0.49 0.52 V
Threshold
VTH Battery Temperature Sense
Comparator High-Voltage 2.44 2.49 2.54 V
Threshold
ITSENSE Battery Temperature Sense 94 100 106 µA
Current
TREG Regulated Junction 120 °C
Temperature
TSD Thermal Shutdown 165 °C
Temperature
VTLDO LDO mode detection threshold TS pin voltage for entry into LDO mode. 3.95 4.0 v
For LM3658SD-B only
VLDO LDO Mode Regulation 6V ≥VCHG_IN ≥4.5V
TS= Floating -3.0 4.2 +3.0 %
IBATT = 100mA
DETECTION AND TIMING
TPOK Power OK Deglitch Time VBATT < VCC – VOK_CHG 40 60 100 ms
TPREQUAL Pre-Qualification Timer 27 30 33 mins
TPQ_FULL Deglitch Time for Pre-
Qualification to Full-Rate 270 300 330 ms
Charge Transition
TFULL_PQ Deglitch Time for Full-Rate to 270 300 330 ms
Pre-Qualification Transition
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ELECTRICAL CHARACTERISTICS (continued)
Unless otherwise noted, VCC (VCHG_IN and/or VUSBpwr) = 5V, VBATT = 3.5V. CCHG_IN = 1 µF, CUSBpwr = 1 µF, CBATT = 1 µF. Typical
values and limits appearing in normal type apply for TJ= 25°C. Limits appearing in boldface type apply over TJ= 0°C to
+85°C. (1)(2)(3)
Symbol Parameter Conditions Min Typ Max Units
TCHG Charge Timer LM3658SD, LM3658SD-B and LM3658SD-A with 270 300 330
USB_sel=high mins
LM3658SD-A with USB_sel=low 540 600 660
TEOC Deglitch Time for End-of- 270 300 330 ms
Charge Transition
TBATTEMP Deglitch Time for Battery 20 40 80 ms
Temperature Fault
TDGL Deglitch Time for EN_b and 20 40 80 ms
USB_sel Pins
TITOPOFF Deglitch Time for ITOPOFF 270 300 330 ms
TTOPOFF Top-Off Charging Timer LM3658SD, LM3658SD-B and LM3658SD-A with 27 30 33
USB_sel=high mins
LM3658SD-A with USB_sel=low 54 60 66
I/O
VIL Low-Level Input Voltage EN_b 0 0.7 V
USB_sel 1.5
VIH High-Level Input Voltage EN_b 1.4 V
USB_sel 2.5
IOL Low-Level Output Current STAT1, STAT2, output voltage = 0.25V 10 25 mA
IOH High-Level Output Current STAT1, STAT2, output voltage = 6.0V 0.01 1µA
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Body
Switcher
Body
Switcher
USBpwr
GND
USB_sel
CHG_IN
EN_b
BATT
Ts
Iset
STAT1
STAT2
BATT
VRESTART
VFULL_RATE
VEOC
VTERM
BATT
TEMP
LDO_on
Iset
Power
Supply
Voltage
References
and Thermo
Sensor
Current
Setting
Block
Logic
and
Timers
Current/Voltage
Control Loop with
Voltage/Current Limits
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LM3658
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BLOCK DIAGRAM
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Constant Current Constant Voltage Maintenance
Pre-
qualification
Battery
Current
0.1C
0.025C
3.0V
50 mA
TCHG
TPREQUAL TCHG
4.2V 4.0V
1C 1C
Time
Battery Voltage
Battery Voltage/Battery Current
TTOPOFF
Constant
Current
ON
OFF OFF
ON ON
OFF
STAT1
STAT2
LM3658
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Li-Ion Charging Profile
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ICHG = KISET
RISET
120°C - TA
TJA(VCC - VBATT)]
or USB_sel or
ICHG = min [
KISET
RISET
LM3658
SNVS328E –MAY 2005–REVISED MARCH 2007
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LM3658 OPERATION DESCRIPTION
POWER-DOWN MODE
The LM3658 will power down automatically when the voltage on the USBpwr or CHG_IN pin drops below the
battery voltage with an amount that is equal to VOK_CHG (VBATT > VCC - VOK_CHG). Power-Down mode shuts off the
internal power FETs as well as the open-drain pull-down transistors on the status pins STAT1 and STAT2. The
only current consumed by the LM3658 is an ultra-low quiescent current of 1 µA typical.
POWER-ON RESET
As soon as the voltage of one of the power sources rises above VBATT + VOK_CHG, the charger will wake up.
However, charging will not be initiated unless the supply voltage source exceeds the VPOR.
AUTOMATIC POWER SOURCE DETECTION
When the voltage of one of the power sources exceeds the VPOR threshold, the LM3658 detects which power
source is a valid charge supply. When both supply voltages are valid and present, CHG_IN will automatically be
selected over USBpwr. The USBpwr will be the designated power source only if no CHG_IN is present or when
the voltage on the CHG_IN pin is less than the battery voltage.
THERMAL POWER FET REGULATION
The internal power FETs are thermally regulated to the junction temperature of 120ºC to specify optimal charging
of the battery. At all times is the charge current limited by the ISET resistor setting, the USB 100 mA/500 mA
selection, or the 100ºC junction temperature of the LM3658. The charge current is therefore a function of the
charge current settings, the thermal conductivity of the package and the ambient temperature as described in the
following equation:
Where TAis the ambient temperature and θJA is the thermal resistance of the package. Thermal regulation
specifies maximum charge current and superior charge rate without exceeding the power dissipation limits of the
LM3658.
PRE-QUALIFICATION MODE
During pre-qualification, STAT1 is on and STAT2 is off, and the charger supplies a constant current of 50 mA to
the battery. When the battery voltage reaches VFULL_RATE, the charger transitions from pre-qualification to full-rate
charging. The pre-qualification mode aborts when the battery doesn’t reach VFULL_RATE within the time allowed in
TPREQUAL timer. In this event, charging stops and STAT1 and STAT2 will both be on, indicating a bad battery
condition.
CHG_IN FULL-RATE CHARGING MODE
The full-rate charge cycle is initiated following the successful completion of the pre-qualification mode. Timer
TCHG starts to count when the charger enters full-rate charging, with STAT1 on and STAT2 off. When charging
with an AC wall adapter, the full-rate charge current is proportional to the value of the resistor that is connected
to the ISET pin as described in the following equation:
It is recommended to charge Li-Ion batteries at 1C rate, where “C” is the capacity of the battery. As an example,
it is recommended to charge a 750 mAh battery at 750 mA, or 1C. Charging at a higher rate can cause damage
to the battery.
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USBpwr FULL-RATE CHARGING MODE
The full-rate charge cycle is initiated following the successful completion of the pre-qualification mode. Timer
TCHG starts to count when the charger enters full-rate charging, with STAT1 on and STAT2 off. If the USB bus
provides the charger supply, then the default full-rate charge current is 100 mA max unless the USB_sel pin is
pulled high, which sets the charge current to 500 mA max.
CONSTANT-VOLTAGE CHARGING MODE AND END-OF-CHARGE (EOC) DETECTION
The battery voltage increases rapidly as a result of full-rate charging and will reach the 4.2V termination voltage,
triggering the constant-voltage charge cycle. Timer TCHG continues to count in this cycle. STAT1 is on and
STAT2 is off. The charge current gradually decreases during constant-voltage charging until it reaches the End-
Of-Charge (EOC), which is equal to 10% of the full-rate current set either by the resistor connected to the ISET pin
or the USB_sel pin. If Timer TCHG times out before EOC is reached, charging stops and STAT1 and STAT2 will
both be on, indicating a bad battery condition.
TOP-OFF CHARGING MODE
Once EOC has been reached, a top-off cycle continues to charge the battery. Timed top-off cycle provides
optimal battery capacity following a complete charge cycle. During this cycle, charging terminates when ICHG
reaches 2.5% of the full-rate charge current or when TTOPOFF times out, whichever occurs first. STAT1 will turn
off and STAT2 will turn on once the top-off cycle completes successfully, indicating that charging is done.
MAINTENANCE MODE
Maintenance mode begins immediately after the charger successfully finishes the top-off cycle. In the
maintenance mode, the battery voltage is being monitored by the LM3658 continuously. If the battery voltage
drops 200 mV below VTERM, a new full-rate charge cycle starts to replenish the battery. As this new full-rate
charge cycle begins, STAT1 will turn on and STAT2 will turn off, and all the timers will reset. Refer to the
LM3658 Flowchart.
CHARGE STATUS OUTPUTS
The LM3658 provides two open-drain outputs STAT1 and STAT2 that can be connected to external LEDs or to
General Purpose I/O’s (GPIO) of a peripheral IC. All charge status of the LM3658 is illustrated in Table 1. “ON”
means that STATx pin is pulled low as its pull-down transistor is turned on, representing a logic 0.
Table 1. Status Pins Summary
STAT1 STAT2 Condition
OFF OFF Power-Down, charging is suspended or
interrupted
ON OFF Pre-qualification mode, CC and CV
charging, Top-off mode
OFF ON Charge is completed
ON ON Bad battery (Safety timer expired), or LDO
mode
SAFETY TIMERS
In order to prevent endless charging of the battery, which can cause damage to the battery, there are three
safety timers that forcefully terminate charging if the charging mode is not completed within the time allowed.
Pre-Qualification Timer (TPREQUAL)
The pre-qualification timer starts with the initiation of the pre-qualification mode and allows 30 minutes to
transition from pre-qualification to full rate charging. If the battery voltage does not reach VFULL_RATE in 30
minutes, charging stops and status pins STAT1 and STAT2 both turn on to indicate a bad battery status.
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-
+
-
hiRef
loRef
Ts
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Charger Timer (TCHG)
The charge timer starts with the initiation of full-rate charging and has a duration of 5 hours for the LM3658. If the
charge current does not reach EOC, charging stops and STAT1 and STAT2 both turn on to indicate a bad
battery status. Once the charge control declares a bad battery, removing the input source is the only means to
clear the bad battery status.
Top-Off Timer (TTOPOFF)
Once the charger successfully completes constant current constant voltage charging, it enters top-off mode and
starts TTOPOFF timer. Topoff lasts 30 minutes for the LM3658. During top-off, charging stops when TTOPOFF
reaches its count or when ICHG reaches 2.5% of the full-rate charge current. There is no time-out condition in top-
off mode.
When charging is interrupted either by battery temperature out of range or disabling the LM3658, the applicable
safety timer will store its count value for the duration of the interruption and subsequently resumes counting from
its stored count value when charging continues, only if the charger resumes to the same operation mode it was
in before the interrupt.
The LM3658SD-A version has selectable timers for TCHG and TTOPOFF. Based on the logic level applied to the
USB_sel pin, timers can be chosen as follow:
Input USB_SEL TPREQUAL TCHG TTOPOFF
CHG_IN Low 30 minutes 10 hours 60 minutes
CHG_IN High 30 minutes 5 hours 30 minutes
USBpwr Low 30 minutes 10 hours 60 minutes
USBpwr High 30 minutes 5 hours 30 minutes
BATTERY TEMPERATURE MONITORING (SUSPEND MODE)
The LM3658 is equipped with a battery thermistor interface to continuously monitor the battery temperature by
measuring the voltage between the TSpin and ground. Charging is allowed only if the battery temperature is
within the acceptable temperature range set by a pair of internal comparators inside the LM3658. If the battery
temperature is out of range, STAT1 and STAT2 both turn off and charging is suspended. Timer holds its count
value.
The TS pin is only active during charging and draws no current from the battery when no external power source
is present.
If the TS pin is not used in the application, it should be connected to GND through 10kΩpulldown resistor.
When the TS pin is left floating (battery removal), then the charger will be disabled as the TS voltage exceeds
the upper temperature limit.
The LM3658 battery temperature feature is tailored to use negative temperature coefficient (NTC) 103AT
thermistors with 10kΩimpedance. If alternative thermistors need to be used in the system, supplemental external
resistors are needed to create a circuit with equivalent impedance.
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R1
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loRef
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R2
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DISABLING CHARGER (CHARGE INTERRUPT MODE)
Charging can be safely interrupted by pulling the EN_b pin high and charging can resume upon pulling the EN_b
pin low. The enable pin can be permanently tied to GND with no extra current consumption penalty during power
down mode. When the charger is disabled, timer holds its count value, and STAT1 and STAT2 are both off.
LDO MODE (AVAILABLE ONLY IN LM3658SD-B VERSION)
The LM3658SD-B version enters LDO mode when the Tspin is floating and AC wall adapter is still connected to
CHG_IN pin. In LDO mode, STAT1 and STAT2 are both on. The LM3658SD-B becomes a linear regulator
capable of delivering 1A of source current. Normally the Tspin is connected to the thermistor from the battery
pack for temperature monitoring purpose. If this pin is disconnected, the LM3658SD-B assumes that there is no
battery present and will automatically invoke the LDO mode. LDO mode allows applications to operate without a
battery provided that the AC wall adapter supplies power to the CHG_IN pin. The LDO mode is not possible in
USB mode.
For the other versions of the LM3658, floating the Tspin does not invoke LDO mode. Instead, it will go to
suspend mode. Please refer to “ Battery Temperature Monitoring” section for more detail.
5 HOUR/ 10 HOUR SELECTABLE TIMER (AVAILABLE ONLY IN LM3658SD-A VERSION)
The LM3658SD-A allows the user to select between 5 hour or 10 hour timer based on the polarity of the
USB_sel pin, in both CHG_IN mode and USBpwr mode. By pulling the USB_sel pin high, the timer is set to 5
hours. In the USBpwr mode, the polarity of the USB_sel pin determines the charge current as well as the timer.
In CHG_IN mode, the polarity of the USB_sel pin determines only the timer. The charge current is set by the
resistor at Iset pin.
INPUT/OUTPUT BYPASS CAPACITORS
Care should be taken to support the stability of the charge system by connecting a 1 µF capacitor as close as
possible to the BATT pin. An input capacitor ranging from 1.0 µF– 10.0 µF must be connected to the CHG_IN
and USBpwr input pins. Low cost ceramic capacitors can be selected.
THERMAL PERFORMANCE OF THE WSON PACKAGE
The LM3658 is a monolithic device with integrated power FETs. For that reason, it is important to pay special
attention to the thermal impedance of the WSON package and to the PCB layout rules in order to maximize
power dissipation of the WSON package.
The WSON package is designed for enhanced thermal performance and features an exposed die attach pad at
the bottom center of the package that creates a direct path to the PCB for maximum power dissipation.
Compared to the traditional leaded packages where the die attach pad is embedded inside the molding
compound, the WSON reduces one layer in the thermal path.
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www.ti.com
The thermal advantage of the WSON package is fully realized only when the exposed die attach pad is soldered
down to a thermal land on the PCB board with thermal vias planted underneath the thermal land. Based on
thermal analysis of the WSON package, the junction-to-ambient thermal resistance (θJA) can be improved by a
factor of two when the die attach pad of the WSON package is soldered directly onto the PCB with thermal land
and thermal vias, as opposed to an alternative with no direct soldering to a thermal land. Typical pitch and outer
diameter for thermal vias are 1.27 mm and 0.33 mm respectively. Typical copper via barrel plating is 1 oz,
although thicker copper may be used to further improve thermal performance. The LM3658 die attach pad is
connected to the substrate of the IC and therefore, the thermal land and vias on the PCB board need to be
connected to ground (GND pin).
For more information on board layout techniques, refer to Application Note 1187 (SNOA401) “Leadless Lead
Frame Package (LLP).” This application note also discusses package handling, solder stencil and the assembly
process.
12 Submit Documentation Feedback Copyright © 2005–2007, Texas Instruments Incorporated
Product Folder Links: LM3658
LM3658
www.ti.com
SNVS328E –MAY 2005–REVISED MARCH 2007
LM3658 FLOWCHARTS
Figure 2. LM3658 Flowchart
Copyright © 2005–2007, Texas Instruments Incorporated Submit Documentation Feedback 13
Product Folder Links: LM3658
No
No
No
CHG_IN Mode
No
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Topoff Mode
No
No
No
No
Yes
Yes
Go to
Charger
Interrupt
Mode
Go to
Bad
Battery
Mode
VBATT t
VFULL_RATE
TPREQUAL
expire
En_b
High
IEOC
detected
VBATT <
VFULL_RATE
TCHG
expire
En_b
High
CHG_IN
CCCV Mode
Go to
Charger
Interrupt
Mode
Go to
Bad
Battery
Mode
Go to
Charger
Interrupt
Mode
Go to
POR
VBATT <
VRESTART
En_b
High
ICHG <
ITOPOFF
TTOPOFF
expire
Prequalification
Mode
CHG_IN Maintenance Mode
No
No
No
Yes
Yes
No
Yes
Yes
No
No
No
No
Yes
Yes
Maintenance Mode
IEOC
detected
VBATT <
VFULL_RATE
TCHG
expire
En_b
High
Go to
Charger
Interrupt
Mode
Go to
Bad
Battery
Mode
Go to
Charger
Interrupt
Mode
Go to
POR
VBATT <
VRESTART
En_b
High
ICHG <
ITOPOFF
TTOPOFF
expire
USBpwr
CCCV Mode Topoff Mode
No
Go to
POR
Yes
CHG_IN
present
No
Yes
USB_SEL is
High Set Ichg =
500 mA
Set
Ichg=100
mA
No
Go to
POR
Yes
CHG_IN
present
No
Yes
USB_SEL is
High Set Ichg =
500 mA
Set Ichg =
100 mA
No
No
No
Yes
Yes
Yes
Go to
Charger
Interrupt
Mode
Go to
Bad
Battery
Mode
VBATT t
VFULL_RATE
TPREQUAL
expire
En_b
High
No
Go to
POR
Yes
CHG_IN
present
USBpwr Mode
Prequalification
Mode
LM3658
SNVS328E –MAY 2005–REVISED MARCH 2007
www.ti.com
Figure 3. LM3658 USBpwr Mode Flowchart
Figure 4. LM3658 CHG_IN Mode Flowchart
14 Submit Documentation Feedback Copyright © 2005–2007, Texas Instruments Incorporated
Product Folder Links: LM3658
PACKAGE OPTION ADDENDUM
www.ti.com 6-Dec-2014
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead/Ball Finish
(6)
MSL Peak Temp
(3)
Op Temp (°C) Device Marking
(4/5)
Samples
LM3658SD-A/NOPB ACTIVE WSON DSC 10 1000 Green (RoHS
& no Sb/Br) CU NIPDAU | CU SN Level-1-260C-UNLIM -40 to 85 L155B
LM3658SD-B/NOPB ACTIVE WSON DSC 10 1000 Green (RoHS
& no Sb/Br) CU NIPDAU | CU SN Level-1-260C-UNLIM -40 to 85 L156B
LM3658SD/NOPB ACTIVE WSON DSC 10 1000 Green (RoHS
& no Sb/Br) CU NIPDAU | CU SN Level-1-260C-UNLIM -40 to 85 L111B
LM3658SDX-A/NOPB ACTIVE WSON DSC 10 4500 Green (RoHS
& no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 L155B
LM3658SDX-B/NOPB ACTIVE WSON DSC 10 4500 Green (RoHS
& no Sb/Br) CU NIPDAU | CU SN Level-1-260C-UNLIM -40 to 85 L156B
LM3658SDX/NOPB ACTIVE WSON DSC 10 4500 Green (RoHS
& no Sb/Br) CU NIPDAU | CU SN Level-1-260C-UNLIM -40 to 85 L111B
(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 - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
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.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
PACKAGE OPTION ADDENDUM
www.ti.com 6-Dec-2014
Addendum-Page 2
(6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
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.
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
LM3658SD-A/NOPB WSON DSC 10 1000 180.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1
LM3658SD-B/NOPB WSON DSC 10 1000 180.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1
LM3658SD/NOPB WSON DSC 10 1000 180.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1
LM3658SDX-A/NOPB WSON DSC 10 4500 330.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1
LM3658SDX-B/NOPB WSON DSC 10 4500 330.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1
LM3658SDX/NOPB WSON DSC 10 4500 330.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1
PACKAGE MATERIALS INFORMATION
www.ti.com 31-Jan-2015
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
LM3658SD-A/NOPB WSON DSC 10 1000 203.0 203.0 35.0
LM3658SD-B/NOPB WSON DSC 10 1000 203.0 203.0 35.0
LM3658SD/NOPB WSON DSC 10 1000 203.0 203.0 35.0
LM3658SDX-A/NOPB WSON DSC 10 4500 367.0 367.0 35.0
LM3658SDX-B/NOPB WSON DSC 10 4500 346.0 346.0 35.0
LM3658SDX/NOPB WSON DSC 10 4500 346.0 346.0 35.0
PACKAGE MATERIALS INFORMATION
www.ti.com 31-Jan-2015
Pack Materials-Page 2
MECHANICAL DATA
DSC0010A
www.ti.com
SDA10A (Rev A)
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