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ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - battery management Charge management Li-Ion WSON 14 (4x4) Surface-mount

1 PF

ISEL

MODE

SCL

SDA

Sense

BATT

10 PF

Li-Ion

CHG

EOC

GND

CHG-IN

LP3947

System

Supply

Diff-Amp

USB Power Source

4.3V to 5.5V

LP3947

www.ti.com

SNVS298B –NOVEMBER 2004–REVISED APRIL 2013

LP3947 USB/AC Adaptor, Single Cell Li-Ion Battery Charger IC

Check for Samples: LP3947

FEATURES

DESCRIPTION

The LP3947 is a complete charge management

• Supports USB Charging Scheme

system that safely charges and maintains a Li-Ion

• Integrated Pass Transistor

battery from either USB power source or AC adaptor.

• Near-Depleted Battery Preconditioning

In USB mode, the LP3947 supports charging in low

power or high power mode. Alternatively, the LP3947

• Monitors Battery Temperature

can take charge from AC adaptor. In both USB and

• Built-In 5.6 Hour Timer

AC adaptor modes, charge current, battery regulation

• Under Voltage and Over Voltage Lockout

voltage, and End of Charge (EOC) point can be

selected via I

C™ interface. The LP3947 can also

• Charge Status Indicators

operate on default values that are pre-programmed in

• Charge Current Monitor Analog Output

the factory. The battery temperature is monitored

• LDO Mode Operation can source 1 Amp

continuously at the Ts pin to safeguard against

hazardous charging conditions. The charger also has

• Continuous Over Current/Temperature

under-voltage and over-voltage protection as well as

Protection

an internal 5.6 hr timer to protect the battery. The

pass transistor and charge current sensing resistor

APPLICATIONS

are all integrated inside the LP3947.

• Cellular Phones

The LP3947 operates in four modes: pre-qualification,

• PDAs

constant current, constant voltage and maintenance

• Digital Cameras

modes. There are two open drain outputs for status

indication. An internal amplifier readily converts the

• USB Powered Devices

charge current into a voltage. Also, the charger can

• Programmable Current Sources

operate in an LDO mode providing a maximum of 1.2

Amp to the load.

KEY SPECIFICATIONS

• 1% Charger Voltage Accuracy Over

0°C ≤ T

≤ 85°C

• 4.3V to 6V Input Voltage Range

• 100 mA to 750 mA Charge Current Range, in

Charger Mode

• 100 mA to 500 mA Charge Current Range, in

USB Mode

• WSON Package Power Dissipation:

2.7W at T

= 25°C

TYPICAL APPLICATION CIRCUIT

More Application Circuit can be found in APPLICATION NOTES.

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.

C is a trademark of Philips Semiconductor Corporation.

3All other trademarks are the property of their respective owners.

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.

Summary of content (20 pages)

PAGE 1
LP3947 www.ti.com SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013 LP3947 USB/AC Adaptor, Single Cell Li-Ion Battery Charger IC Check for Samples: LP3947 FEATURES DESCRIPTION • • • • • • • • • • The LP3947 is a complete charge management system that safely charges and maintains a Li-Ion battery from either USB power source or AC adaptor. In USB mode, the LP3947 supports charging in low power or high power mode. Alternatively, the LP3947 can take charge from AC adaptor.
PAGE 2
LP3947 SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013 www.ti.com 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. CONNECTION DIAGRAMS AND PACKAGE MARK INFORMATION 14 13 12 11 10 9 8 1 2 3 4 5 6 7 Figure 1. Package Number NHL0014B (Top View) PIN DESCRIPTIONS Pin # Name Description 1 EN Charger Enable Input.
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LP3947 www.ti.com SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013 LP3947 FUNCTIONAL BLOCK DIAGRAM ISEL Mode SDA CHG ON/OFF 2 I C and Digital Control SCL LED Driver EOC EN RSENSE CHG-IN BATT + Diff Amp Power FET Control VT Charger control LDO Mode Vref + - TS UTLO LDO Error Amp + OTLO + - ABSOLUTE MAXIMUM RATINGS (1) (2) If Military/Aerospace specified devices are required, contact the Texas Instruments Semiconductor Sales Office/ Distributors for availability and specifications. −0.
PAGE 4
LP3947 SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013 www.ti.com RECOMMENDED OPERATING CONDITIONS (1) (2) CHG-IN 0.3V to 6.5V EN, ISEL, MODE, SCL, SDA, VT (3) 0V to 6V −40°C to +125°C Junction Temperature −40°C to +85°C Operating Temperature Thermal Resistance θJA Maximum Power Dissipation (1) 37°C/W (4) 1.21W Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is ensured.
PAGE 5
LP3947 www.ti.com SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013 ELECTRICAL CHARACTERISTICS (continued) Unless otherwise noted, VCHG-IN = 5V, VBATT = 4V, CCHG-IN = 1 µF, CBATT = 10 µF. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, TJ = −40°C to +85°C. (1) (2) (3) Symbol Parameter Conditions 100 mA to 450 mA, 0.
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LP3947 SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013 www.ti.com ELECTRICAL CHARACTERISTICS, I2C INTERFACE Unless otherwise noted, VCHG-IN = VDD = 5V, VBATT = 4V. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, TJ = −40°C to +125°C. (1) (2) (3) Symbol VIL Parameter Conditions Low Level Input Voltage Typ Limit Min Max Units SDA & SCL (2) 0.4 0.
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LP3947 www.ti.com SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013 APPLICATION NOTES LP3947 CHARGER OPERATION The LP3947 charge cycle is initiated with AC adaptor or USB power source insertion. If the voltage on the CHGIN pin meets under-voltage (VUVLO-TSHD), over-voltage (VOVLO-TSHD) requirements, and the Adaptor OK signal is detected, then pre-qualification cycle begins (see Figure 2).
PAGE 8
LP3947 SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013 4.3V < VCHG-IN < 6.0V and VBATT < VCHG-IN www.ti.com 4.3V < VCHG-IN < 6V VBATT > VCHG-IN Ts t 2.7V Charger Off LED's Off 1.39V < Ts < 2.42V LDO Mode ICHG = 1.2A VBATT = 4.1V* RLED = On GLED = Off LED's Off Pre-Qualification Charge Current = 50 mA 1.39V 3.0V? N Y Set Fast Charge Current = I Start 5.6 hr Timer Timer time out Timer = 5.
PAGE 9
LP3947 www.ti.com SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013 CHARGE CURRENT SELECTION IN CONSTANT CURRENT MODE In the AC adaptor mode, the LP3947 is designed to provide a charge current ranging from 100 mA to 750 mA, in steps of 50 mA, to support batteries with different capacity ratings. The default value is 500 mA. No external resistor is required to set the charge current in the LP3947. In the USB mode, the LP3947 will initially charge with 100 mA (ISEL = high).
PAGE 10
LP3947 SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013 www.ti.com Table 3. LED Indicator Summary RED LED (CHG) GREEN LED (EOC) OFF OFF Charger Off Charging Li Ion Battery (1) ON OFF Maintenance Mode OFF ON Charging Li Ion Battery after Passing Maintenance Mode OFF ON EN Pin = LOW OFF ON LDO Mode OFF OFF 5.6 Hr Safety Timer Flag/Battery Temperature Violation ON ON (1) Charging Li Ion battery for the first time after VCHG-IN insertion.
PAGE 11
LP3947 www.ti.com SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013 VCHG-IN CHG-IN CHG-IN VCHG-IN 0 VCHG-IN VCHG-IN EN EN 0 0 4.1V 3.0V Load < 50 mA VBATT VBATT 0 3.0V 0 Load > 50 mA 0 0 0 Time Time Figure 6. Power Up Timing Diagram in Charger Mode (1.39V < Ts < 2.427V) VCHG-IN CHG-IN CHG-IN VCHG-IN 0 VCHG-IN 0 EN EN VCHG-IN 0 4.1V 4.1V VBATT VBATT 0 0 0 0 0 Time Time Figure 7. Power Up Timing Diagram in LDO Mode (Ts ≥ 2.
PAGE 12
LP3947 SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013 www.ti.com Table 5. LP3947 Serial Port Communication address code 7h’47 LP3947 Control and Data Codes (1) (1) Addrs Register 8′h00 7 6 5 4 3 2 1 0 Charger Register -1 Batt Voltage (0) = 4.1V 1 = 4.
PAGE 13
LP3947 www.ti.
PAGE 14
LP3947 SNVS298B – NOVEMBER 2004 – REVISED APRIL 2013 www.ti.com REVISION HISTORY Changes from Revision A (April 2013) to Revision B • 14 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
PAGE 15
PACKAGE OPTION ADDENDUM www.ti.
PAGE 16
PACKAGE OPTION ADDENDUM www.ti.com 7-Oct-2013 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.
PAGE 17
PACKAGE MATERIALS INFORMATION www.ti.com 11-Oct-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LP3947ISD-09/NOPB WSON NHL 14 1000 178.0 12.4 4.3 4.3 1.3 8.0 12.0 Q1 LP3947ISD-51/NOPB WSON NHL 14 1000 178.0 12.4 4.3 4.3 1.3 8.0 12.0 Q1 LP3947ISDX-51/NOPB WSON NHL 14 4500 330.0 12.4 4.3 4.3 1.3 8.0 12.
PAGE 18
PACKAGE MATERIALS INFORMATION www.ti.com 11-Oct-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LP3947ISD-09/NOPB WSON NHL 14 1000 210.0 185.0 35.0 LP3947ISD-51/NOPB WSON NHL 14 1000 210.0 185.0 35.0 LP3947ISDX-51/NOPB WSON NHL 14 4500 367.0 367.0 35.
PAGE 19
MECHANICAL DATA NHL0014B SDA14B (Rev A) www.ti.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.