LM3658 Chemistry Charger Datasheet

LM3658 Datasheet, PDF, Equivalent


Part Number

LM3658

Description

Dual Source USB/AC Li Chemistry Charger

Manufacture

etcTI

Total Page 22 Pages
Datasheet
Download LM3658 Datasheet


LM3658
LM3658
www.ti.com
SNVS328E – MAY 2005 – REVISED MARCH 2007
LM3658 Dual Source USB/AC Li Chemistry Charger IC for Portable Applications
Check for Samples: LM3658
FEATURES
1
2 Integrated Power FETs with Thermal
Regulation
• Charges from Either an AC Wall Adapter or
USB Power Source with Automatic Source
Selection
• 50 mA to 1000 mA Charge Currents Using AC
Wall Adapter
• Pin-Selectable USB Charge Currents of 100
mA or 500 mA
• LDO Mode with 1A of Source Current is
Automatically Invoked When the Battery is
Absent and the AC Wall Adapter is Connected
• Continuous Battery Temperature Monitoring
• Built-in Multiple Safety Timers
• Charge Status Indication
• Continuous Over-current and Temperature
Protection
• Near-depleted Battery Pre-conditioning
• Sleep Mode with Ultra Low Quiescent Current
• On-board Kelvin-sensing Achieves ±0.35%
Termination Accuracy
• Maintenance Mode with Automatic Recharge
• Thermally Enhanced 3 mm x 3 mm WSON
Package
APPLICATIONS
• Smartphones
• Digital Still Cameras
• PDAs
• Hard Drive and Flash-based MP3 Players
• USB-powered Devices
DESCRIPTION
The LM3658 is a single chip charger IC designed for
handheld applications. It can safely charge and
maintain a single cell Li-Ion/Polymer battery operating
from an AC wall adapter or USB power source. Input
power source selection of USB/AC is automatic. With
both power sources present, the AC power source
has priority. Charge current is programmed through
an external resistor when operating from an AC wall
adapter allowing charge currents from 50 mA to 1000
mA. When the battery is charged using USB power,
charge currents of 100 mA or 500 mA are pin-
selectable. The termination voltage is controlled to
within ±0.35% of 4.2V.
The LM3658 requires few external components and
integrates internal power FETs, reverse current
protection and current sensing. The internal power
FETs are thermally regulated to obtain the most
efficient charging rate for a given ambient
temperature.
The LM3658 operates in five modes: pre-qualification
mode, constant-current mode, constant-voltage
mode, top-off mode and maintenance mode.
Additionally, the charger IC operates as a linear
regulator in “LDO mode”, when the AC wall adapter is
connected and no battery is present. Optimal battery
management is obtained through thermal regulation,
battery temperature measurement and multiple safety
timers. The LM3658 provides two open-drain outputs
for LED status indication or connection to GPIOs.
Typical Application
CHG_IN
4.5V to 6V
1 PF
1
USBpwr
4.5V to 6V
1 PF
2
GND
USB_sel
EN_b
3
4
5
LM3658
BATT
10
1 PF
+
Battery
Pack
Ts
9
Iset
8
Stat1
7
Stat2
6
1
Please 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.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005–2007, Texas Instruments Incorporated

LM3658
LM3658
SNVS328E – MAY 2005 – REVISED MARCH 2007
Connection Diagram and Package Mark Information
www.ti.com
1 10
29
Die-Attach
Pad (DAP)
38
GND
47
56
10
9
Die-Attach
8 Pad (DAP)
7 GND
6
1
2
3
4
5
Top View
Bottom View
Figure 1. WSON10 Package Drawing
Pin #
1
2
3
4
Name
CHG_IN
USBpwr
GND
USB_sel
5 EN_b
6 STAT2
7 STAT1
8 ISET
9 TS
10 BATT
Pin Descriptions
Description
AC wall adapter input pin.
USB power input pin.
Power and signal ground pin.
Pulling this pin low limits the USB charge current to 100 mA. Pulling this pin high limits the USB charge current to
500 mA.
Pulling this pin low enables the charger. Pulling this pin high disables the charger.
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.
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.
A resistor is connected between this pin and GND. The resistor value determines the full-rate charge current when
using the AC source.
Battery 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.
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)
All other pins except GND
Power Dissipation (4)
Junction Temperature (TJ-MAX)
Storage Temperature Range
ESD Rating (5)
Human Body Model:
Machine Model:
0.3V to +6.5V
0.3V to CHG_IN or USBpwr
Internally Limited
+150°C
65°C to +150°C
2.0 kV
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 kresistor into each pin. The machine model is a 200 pF
capacitor discharged directly into each pin. MIL-STD-883 3015.7
2 Submit Documentation Feedback
Product Folder Links: LM3658
Copyright © 2005–2007, Texas Instruments Incorporated


Features LM3658 www.ti.com SNVS328E – MAY 200 5 – REVISED MARCH 2007 LM3658 Dual S ource USB/AC Li Chemistry Charger IC fo r Portable Applications Check for Sampl es: LM3658 FEATURES 1 •2 Integrated Power FETs with Thermal Regulation • Charges from Either an AC Wall Adapter or USB Power Source with Automatic Sour ce Selection • 50 mA to 1000 mA Charg e Currents Using AC Wall Adapter • Pi n-Selectable USB Charge Currents of 100 mA or 500 mA • LDO Mode with 1A of S ource Current is Automatically Invoked When the Battery is Absent and the AC W all Adapter is Connected • Continuous Battery Temperature Monitoring • Bui lt-in Multiple Safety Timers • Charge Status Indication • Continuous Over- current and Temperature Protection • Near-depleted Battery Pre-conditioning • Sleep Mode with Ultra Low Quiescent Current • On-board Kelvin-sensing Ac hieves ±0.35% Termination Accuracy • Maintenance Mode with Automatic Rechar ge • Thermally Enhanced 3 mm x 3 mm WSON Package APPLICATIONS • Smartphones • Digital Still Ca.
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