TWL2213CA [TI]

POWER SUPPLY MANAGEMENT IC AND Li-Ion BATTERY CHARGE CONTROL; 电源管理IC和锂离子电池充电控制


型号：	TWL2213CA
厂家：	TEXAS INSTRUMENTS
描述：	POWER SUPPLY MANAGEMENT IC AND Li-Ion BATTERY CHARGE CONTROL 电源管理IC和锂离子电池充电控制电池
文件：	总31页 (文件大小：438K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

Integrated, Single-Chip Solution for Battery

Charge Control and Power Supply

Management

Six Programmable Low-Dropout Linear

Voltage Regulators

System Over- and Under-Voltage Shut

Down

Linear Charger for Single-Cell Li-Ion or

Li-Polymer Packs

Power On/Power Off and Reset Control

Logic

Integrated Control Over Precharge,

Constant-Current and Constant-Voltage

Charging Phases

Three Individually Selectable LED Backlight

Drivers

Programmable Charging Current

Vibrator and Ringer Drivers

Programmable Charge Termination by

Minimum Current and Time

Internal 8-Bit Analog-to-Digital Converter

(ADC) with Auxiliary Inputs

Battery Temperature Sensing

I C Control Interface

Pack Wake Up and Damaged Cell Detect

Functions

48-Terminal Plastic TQFP(PFB)

Safety Charge Timers During Precharge

and Constant-Current Charging

description

The TWL2213 is a single-chip battery and power management solution for wireless handsets, pagers, personal

data assistants (PDAs), and other battery-powered devices. For battery charging, the device incorporates a

linear charger for single-cell Li-Ion and lithium polymer battery packs. Prior to charging, the TWL2213 initiates

battery pack wake up and damaged cell detect functions. For deeply discharged batteries, the device performs

precharge conditioning by trickle-charge to user-defined current settings. Once acceptable pack voltage is

detected, TWL2213 applies a constant-current fast charge at a current level that is determined by a combination

of an external sense resistor and user-programmable sense voltage. When the battery reaches the selected

charge regulation voltage, TWL2213 maintains regulation until charging is terminated by a minimum current or

a timer. During the entire charge cycle, TWL2213 monitors temperature by external thermistor and suspends

charging if temperature exceeds a programmed range. Three programmable safety timers limit the precharge,

constant-current, and total charge times.

For power management, the TWL2213 includes six low-dropout linear voltage regulators. One regulator is

driven from the device’s power on/off logic and incorporates a microcontroller reset function. Five low noise

regulators include individually programmable output voltage and enable-disable. The TWL2213 can be

powered from a battery or AC adapter. When an adapter is present, it supplies power to the device, allowing

the system to function without battery.

TWL2213 also includes individually selectable drivers for three separate backlight LEDs, a ringer, and a vibrator

motor. An internal 8-bit analog-to-digital converter (ADC) is accessible from external pins. The system

microcontroller accesses all TWL2213 programming and status via the I C serial interface.

The TWL2213 device is packaged in the Texas Instruments 48-terminal plastic thin quad flatpack (TQFP)

package (PFB).

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.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

AVAILABLE OPTIONS

OUTPUT VOLTAGE

DEVICE NAME

PACKAGE

REGULATOR 1

2.8 V

REGULATOR 6

–40°C to 85°C

TWL2213CAPFBR

TQFP

3 V

PFB PACKAGE

(TOP VIEW)

36 35 34 33 32 31 30 29 28 27 26 25

ADCIN1

ADCIN2

CONT

PWRKOUT

PWRKIN

PSH

DATA

CLK

CD2

DGND

VIOUT

REG5

DD4

REG4

BGRF

GND2

DD5

RINGOUT 46

REG3

RINGIN

GND3

DD3

REG2

9 10 11 12

DISSIPATION RATING TABLE

OPERATING FACTOR

= 25°C

= 70°C

T = 85°C

PACKAGE

POWER RATING

ABOVE 25°C

POWER RATING POWER RATING

PFB

1962 mW

15.7 mW/C

1256 mW 1020 mW

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

block diagram

IRQ

Battery Charger Control

GND

REF

DD1

AGND

GND

REG1

Reference System

BGRF

Reset

Control

XRST

CD1

PWRKOUT

PWRKIN

PSH

DD2

REG6

Power

On/Off

Control

REG6

CONT

CD2

DD3

REG2

REG3

REG4

REG5

REG2

DATA

CLK

I C

DGND

REG3

DD4

REG4

LED

Driver

Ring

Driver

Vibrator

Driver

REG5

GND2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

Terminal Functions

TERMINAL

PFB NO.

I/O

DESCRIPTION

NAME

ADCIN1

ADC input

ADCIN2

AGND

BGRF

CD1

ADC input

I/O

Regulator 1 ground

Band gap output bypass capacitance

XRST output delay adjustment capacitance

Regulator 1 off delay adjustment capacitance

CD2

CLK

I C bus serial clock input

CONT

Regulator 6 is always on after power up except when CONT = H; regulator 6 is

enabled through I C interface.

12, 34

I/O

External oscillator timing cap

DATA

DGND

GND

I C bus serial address/data input output; this is a bidirectional terminal

Digital ground

Ground

GND2

GND3

IL0

Ground for V

, V

, and V

REG5

REG2 REG3 REG4

Vibrator, LED, ringer ground

160-mA LED driver output

20-mA LED driver output

10-mA LED driver output

IL1

IL2

IRQ

Interrupt signal for external controller regarding to charger START/STOP action

Current sense input for charger function

Power hold signal from controller

ISENSE

PSH

PWRKIN

PWRKOUT

REF

Power-up start

I/O

Power-up signal for CPU

Voltage reference during charge cycle, 3 V, I = 3 mA

RINGIN

RINGOUT

RPRE

SEL

Input for ring driver

Ring driver output

Precharge current sense resistor

Input for vibrator output voltage change

Battery temperature sense input voltage

Battery voltage sense input or output for precharge, wakeup

DC voltage input for charger

VBAT

VCHG

I/O

Device dc supply feedback for charger function

Device dc supply input and regulator 1 input

Input to regulator 6

DD1

DD2

DD3

DD4

DD5

Input for regulators 2 and 3

Input for regulators 4 and 5

Input for vibrator, PN diode connection of ringer

Gate control of an external P-FET for charger regulation

Gate control of an external P-FET for battery blockage

Gate control of an external P-FET for charging action

Vibrator output

I/O

VG2

VG3

VIOUT

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

Terminal Functions (Continued)

TERMINAL

PFB NO.

I/O

DESCRIPTION

NAME

REG1

Regulator 1 output

Regulator 2 output

Regulator 3 output

Regulator 4 output

Regulator 5 output

Regulator 6 output

Reset output

REG2

REG3

REG4

REG5

REG6

XRST

detailed description

power on/off control

The power on/off control circuit controls the timing of the delayed power on reset. There are two different reset

conditions: the manual power condition and the adapter power-on condition.

Under the manual-powered condition, if the power key is pressed, the PWRKIN signal goes high and V

REG1

(regulator 1 output) is enabled. After V

reaches 90% of its nominal output voltage, the TWL2213 starts the

REG1

delayed reset process by charging the reset timing capacitor (CD1). When the voltage of CD1 reaches 1.2 V,

the XRST signal is released by TWL2213 and is pulled high by an external pull-up resistor. This completes the

reset process, and the external controller operates in normal condition. While the PWRKIN signal remains high,

the power-on condition remains active. Before the PWRKIN signal goes low, the external controller must drive

PSH high to retain power; otherwise, the TWL2213 starts the delay power-off process by charging the CD2

timing capacitor. After the voltage of CD2 reaches 1.2 V and no valid PSH signal is received, the device is

powered off.

Under the adapter power-on condition, no battery is attached to the device. During the power-off state, after the

adapterisattached,theoutputofV

(regulator1output)isautomaticallyenabled.AfterV

reaches90%

REG1

of its nominal output voltage, the TWL2213 starts the delayed reset process by charging the reset timing

capacitor (CD1). When the voltage of CD1 reaches 1.2 V, the XRST signal is released by TWL2213 and is pulled

high by an external pull-up resistor. This completes the reset process, and the external controller operates in

normal condition. The external controller must drive PSH high to retain power; otherwise, the TWL2213 starts

the delay power-off process by charging the CD2 timing capacitor. After the voltage of CD2 reaches 1.2 V and

no valid PSH signal is received, the device is powered off.

During the power-on state, the device generates an output signal (PWRKOUT) with the inverted polarity to

PWRKIN. The external controller can use the PWRKOUT signal to detect power key action.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

detailed description (continued)

Battery Attachment

VG3

VG2

VDD

PWRKIN

PWRKOUT

0.9 V

OUT

VREG1

CD1

Delay

CPU senses this falling

edge and drives PSH to L

XRST

PSH

CD2

Power Off

Power On

Figure 1. Power-On/-Off Sequence

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

detailed description (continued)

VG3

VG2

VDD

PWRKIN

PWRKOUT

VCHG

Adapter Attachment

0.9 V

OUT

VREG1

CD1

Delay

CPU senses this falling

edge and drives PSH to L

CD1

XRST

PSH

CD2

Power down by

power key insertion

Auto power up with

adapter insertion

Figure 2. Power-On/-Off Sequence

reset controller

The reset controller performs two major functions; one is to control the timing of delayed power-on reset, and

the other is to monitor the V level.

REG1

The delay reset process is started when V

(regulator 1 output) reaches 90% of its nominal output voltage

REG1

level. The delay time of the reset output (XRST) can be adjusted by external timing capacitance (CD1) (see

Figure 1, and Figure 2).

During system active state when V

reaches 90% of its nominal output voltage level again, the delayed reset process starts over.

drops below 0.9V

– hysteresis, XRST is driven low. If V

REG1

nominal REG1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

detailed description (continued)

0.9 V

CD1

VREG1

Hysteresis

OUT

XRST

PSH

Delay

CD1

CD2

To keep power on condition PSH

must be high within max CD2 delay.

Figure 3. V

Monitoring of Reset Control

REG1

regulator 1

This regulator is automatically enabled after the power-on process is complete. It stays enabled until the

power-off condition occurs. Regulator 1 supplies power to the microprocessor. The nominal output voltage is

2.8 V, and the maximum output current is 150 mA. It requires an output capacitor in the range of 4.7 µF–10 µF

with an equivalent serial resistance (ESR) less than 6 Ω.

regulator 6

This regulator output voltage can be enabled by I C/SPI by attaching the CONT terminal to V . Attaching

CONT to GND makes this regulator automatically enabled with power on. The output voltage is programmed

by I C/SPI. The maximum out current of 100 mA requires an output capacitor in range of 4.7 µF–10 µF, with

ESR in the range of 1Ω–6 Ω. The output voltage ranges from 2.5 V to 3 V.

regulators 2, 3, 4, and 5

Regulators 2, 3, 4, and 5 are output voltages programmed and enabled by I C. The output voltage ranges from

2.3 V to 3 V in 100-mV steps. The maximum output current for regulators 2 and 3 is 80 mA, for regulator 4 it

is 120 mA, and for regulator 5 it is 150 mA. The default output voltage for all regulators is 3 V. These regulators

have very low output noise; this noise level is suitable for powering up the RF block, which requires an output

capacitor in the range of 4.7 µF–10 µF with an ESR less than 6 Ω.

vibrator driver

The TWL2213 device has incorporated a vibrator driver with selectable output voltage and current. This

integrated vibrator driver has the same feature as the other load dropout (LDO) regulators. The vibrator is

enabled by I C. The output voltage can be selected by tying the SEL terminal to V or GND. If the SEL terminal

is tied to V , the output voltage is set to 3 V. If the SEL terminal is tied to GND, the output voltage is set to 1.3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

detailed description (continued)

LED driver

The TWL2213 device provides the capability of driving three LEDs. These drivers, enabled by I C, can drive

currents of 160 mA, 20 mA, and 10 mA individually with a maximum voltage drop of 0.8 V.

ringer driver

The TWL2213 device provides the capability of driving a ringer. It is enabled by I C and uses an N-channel FET

with a maximum resistance of 3 Ω.

I C

This block provides I C interface to the external devices.

battery charger control

This block provides the necessary signals to control the external circuits that perform the charger function. The

charging activities include battery pack wake up, precharge, fast charge, and battery temperature monitoring.

This block also provides two ADC inputs for general measurement purpose. The input voltage level is from 0

to 2 volts. This block also includes an oscillator generator circuit, which generates the clocks for the device. The

nominal frequency of the main clock is 500 kHz. It requires an external capacitor of 470 pF.

reference system

This block provides voltage reference and bias current for the internal circuitry.

†

absolute maximum ratings over operating free-air temperature (unless otherwise noted)

VCHG to GND (terminal 34) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 12 V

All other terminals relative to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 6.5 V

Operating ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25°C to 85°C

Operating junction temperature range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25°C to 150°C

Storage temperature range, T

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 150°C

stg

Soldering temperature (for 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

recommended operating conditions

MIN

4.5

MAX

UNIT

VCHG

DD1

– V

3.3

4.3

DD5

High-level logic input, PWRKIN, SEL, CONT

Low-level logic input, PWRKIN, SEL, CONT

High-level logic input, PSH

0.7V

DD1

GND

0.3V

DD1

0.7V

REG1

GND

REG1

Low-level logic input, PSH

0.3V

REG1

Precharge current

100

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

electrical characteristics

regulator 1 (C = 4.7 µF with ESR = 2 Ω)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

2.91

150

550

UNIT

Output voltage

Output current

Short circuit

= I

MAX

2.68

2.8

REG1

= 3.8 V

DD1

Load regulation

Line regulation

Dropout voltage

Ripple rejection

1 mA to I

, V = 3.8 V

MAX DD1

O =

= 3.3 V to 4.3 V, I = I

DD1

MAX

= I

100

300

MAX

f = 120 Hz, V

= 3.8 V

VIO

DD1

= 1.5 mA (regulator 1 and internal bias circuitry are

Standby current

120

µA

(Standby)

active)

regulator 6 (C = 4.7 µF with ESR = 2 Ω)

This 100 mA LDO can be enabled with serial interface I C or by the CONT terminal. The output range is from

2.5 V to 3 V.

PARAMETER

TEST CONDITIONS

MIN

2.88

0.96V

TYP

MAX

3.12

1.04V

UNIT

CONT = Low

CONT = High (see Note 1 and function register 4)

Output voltage

REG6

Output current

Short circuit

100

330

µs

Load regulation

Line regulation

Dropout voltage

Ripple rejection

Turnon time

= 1 mA to I

, V = 3.8 V

MAX DD2

= 3.3 V to 4.3 V, I = I

O MAX

DD2

= I

100

300

MAX

f = 120 Hz

See Note 2

See Note 3

VIO

150

Turnoff time

µA

off

Quiescent current

= 1.5 mA

(Quiescent)

NOTES: 1. I C-programmable. V is the programmed voltage. Refer to function registers 2 and 3 for programming information.

(p)

2. Output enable to output voltage = 0.9 × nominal value

3. Output disable to output voltage = 0.5 V

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

electrical characteristics (continued)

regulators 2, 3, 4, and 5 (C = 4.7 µF with ESR = 2 Ω)

Regulators 2, 3, 4, and 5 provide programmable output. The output range, 2.3 V to 3 V, can be programmed

in 100-mV steps.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Output voltage

See Note 1

Regulator 2

Regulator 3

Regulator 4

Regulator 5

Regulator 2

Regulator 3

Regulator 4

Regulator 5

0.96V

1.04V

Output current

120

150

300

400

500

Short-circuit current

Load regulation

Regulator 2, I = 1 mA to I

MAX

Regulator 4, I = 1 mA to I

Regulators 3 and 5, I = 1 mA to I

MAX

Line regulation

Dropout voltage

Ripple rejection

Output noise

V = 3.3 V to 4.3 V

= I

300

(dropout)

MAX

f = 10 kHz

VIO

f = 10 Hz to 100 kHz, I = I

, V = 3.3 V

MAX

µV

RMS

Turnon time

See Note 2

µs

µA

Turnoff time

No load, See Note 3

off

Quiescent current

= 1 mA

150

(Quiescent)

regulator 1 voltage DET

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

≤ V

–V

0.3

REG1

TH HY

Voltage at XRST (see Note 4)

≥ V

REG1

100

Hysteresis Voltage

120

1.25

1.3

Time delay voltage at CD1

Time delay current at CD1

1.15

0.7

1.2

µA

NOTE 4:

is 90% of the nominal V

REG1

LED driver

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

160

UNIT

µA

Output current at IL0

= 0.8 V

IL0

IL1

IL2

Output current at IL1

Output current at IL2

Leakage current

Off

lkg

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TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

electrical characteristics (continued)

vibrator driver

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

3.12

UNIT

Output voltage

Output current

Output voltage

Output current

Line regulation

Load regulation

Quiescent current

Current limit

SEL = H

SEL = L

2.88

1.17

1.3

1.43

140

µA

= 3.3 V to 4.3 V, I

= I

OUT MAX

DD5

OUT

= 1 mA to I

= 0

, V = 3.8 V

MAX DD5

(Quiescent)

= 0, V

= 3.3 V to 4.3 V

DD5

490

ring driver

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Ω

On resistance

Leakage current

= 100 mA at 25°C

out

Off

µΑ

lkg

battery charger control

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

= 4.1 V

4.059

4.158

4.1 4.141

4.2 4.242

(BREG)

System V

DD1

= 4.2 V (see function control register)

(BREG)

Required 0.1 µF capacitor ESR of 2 Ω , load = 1 mA

maximum

2.91

3.09

REF

Set maximum current, 100 to 200, in 20-mV steps with

Current sense voltage

(current sense)

sense

I C. See CSV register.

VGH

VGL

IGH = –0 mA

IGL = –0 mA

VCHG

IGH

149

214

178.5

218

VBAT

197

226

VG = 2 V

µA

IGL

VG2H

VG2L

IG2H

IG2L

VG3H

VG3L

IG3H

IG3L

IG2H = 0 mA

IG2L = 0 mA

VG2

IG2

VG3

IG3

VG2 = VBAT – 0.3 V

VG2 = 0.3 V

–2.8

–4.03 –4.65

3.2

5.02

5.70

IG3H = –0 mA

IG3L = 0 mA

DD1

VG3 = V

DD1

VG3 = 0.3 V

– 0.3 V

–2.7

–3.87 –4.65

4.43 5.3

2.95

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TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

electrical characteristics (continued)

battery charger control (continued)

PARAMETER

TEST CONDITIONS

= 4.1 V (See Note 5)

MIN

TYP

MAX

UNIT

4.059

4.158

4.1 4.141

4.2 4.242

1.9

(BREG)

= 4.2 V

VBAT regulation (CV)

BREG

Low voltage cutoff

High voltage cutoff

4.45

Fast charge voltage

Precharge voltage

Pack wake-up voltage

Operating current

3.2

VBAT

(see Note 6)

1.9

2.05

2.2

4.214

4.30 4.386

NOTES: 5. V

is the regulated battery voltage programmed by setting bit1 of CSV register.

VRPC

(BREG)

6. Precharge current set by I

where V

+ 1.2 V " 10%

pre

RPC

ADC specification

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

bit

Resolution

Output impedance <100 kΩ

Confirm monotonous (see Note 7)

ADC output = 00H

Integral nonlinearity

Low-level input

High-level input

Input capacitance

ADC CLK

–1

LSB

0.1

2.1

ADC output = FFH

1.9

450

500

550

kHz

CLK

µs

ADC conversion time, t

Power-up time

From the start of SETUP

From the ADEN up selection

NOTE 7: LSB +

+ 7.8 mV

255

logic level output

PARAMETER

TEST CONDITION

MIN

MAX

UNIT

of terminals PWRKOUT, IRQ

of DATA

= –2 mA

= 2 mA

0.8V

REG1

GND

0.22V

REG1

GND

of XRST

= –2 mA (open drain with 100-kΩ internal pullup)

= 2 mA (open drain 100-kΩ internal pullup)

REG1

of XRST

0.22V

REG1

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TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

I C bus protocols

The TWL2213 serial interface is designed to be I C bus compatible, operating in the slave mode. This interface

consists of the following terminals:

CLK: I C bus serial clock. This input synchronizes the control data transfer from and to the microprocessor.

DATA: I C bus serial address/data input/output. This is a bidirectional terminal that transfers registers,

controladdresses, anddataintoandoutofthemicroprocessor. Thisterminalisanopendrainandrequiresa

pullup resistor of 10 kΩ to V

REG1

The TWL2213 device has a fixed device select addresses of E4h for write mode and E5h for read mode. For

normal data transfer, DATA is allowed to change only when CLK is low. Changes when CLK is high are reserved

for indicating the start and stop conditions. Data transfer may be initiated only when the bus is not busy (both

DATA and CLK lines remain high). During data transfer, the data line must remain stable whenever the clock

line is at high. There is one clock pulse per bit of data. Each data transfer is initiated with a start condition and

terminated with a stop condition. When addressed, the TWL2213 device generates an acknowledge after the

reception of each byte. The master device (microprocessor) must generate an extra clock pulse that is

associated with the acknowledge bit. The TWL2213 device must pull down the DATA line during the

acknowledge clock pulse so that the DATA line is at stable low state during the high period of the acknowledge

clock pulse. The DATA line is at a stable low state during the high period of the acknowledge related clock pulse.

Setup and hold times must be taken into account. During read operations, a master must signal the end of data

to the slave by not generating an acknowledge bit on the last byte that was clocked out of the slave. In this case,

the slave TWL2213 device must leave the data line high to enable the master to generate the stop condition.

DATA

CLK

Data Line

Stable;

Data Valid

Change

of Data

Allowed

Figure 4. Bit Transfer on the I C Bus

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TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

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SLVS280 – MARCH 2001

I C bus protocols (continued)

DATA

CLK

START Condition

STOP Condition

Figure 5. START and STOP Conditions

CLK

DATA

Start

A0 R/W ACK

R0 ACK

D0 ACK

Stop

Slave Address

Data

NOTE: SLAVE = TWL2213

Figure 6. I C Bus Write to TWL2213 Device

CLK

A6 A5

A0 R/W ACK

R7 R6

R0 ACK

A0 R/W ACK D7 D6

D0 ACK

DATA

Start

Stop

Slave Drives

the Data

Master

Drives

Slave Address

Repeated

Start

ACK and Stop

NOTE: SLAVE = TWL2213

Figure 7. I C Read From TWL2213 Protocol A

CLK

DATA

A0 R/W ACK D7

D0 ACK

A6 A5

A0 R/W ACK

R7 R6

R0 ACK

A6 A5

Start

Stop

Master

Drives

Stop Start

Slave Drives

the Data

Slave Address

ACK and Stop

NOTE: SLAVE = TWL2213

Figure 8. I C Read From TWL2213 Protocol B

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SLVS280 – MARCH 2001

I C timing

DATA

BUF)

h(STA)

(LOW)

CLK

su(STO)

h(STA)

(HIGH)

su(STA)

h(DATA)

su(DATA)

STO

STA

STO

MIN

MAX

UNIT

kHz

Clock frequency, f

400

max

Clock high time, t

600

wH(HIGH)

Clock low time, t

1300

wL(LOW)

DATA and CLK rise time, t

300

DATA and CLK fall time, t

Hold time (repeated) START condition (after this period the first clock pulse is generated), t

h(STA)

600

Setup time for repeated START condition, t

h(DATA)

Data input hold time, t

h(DATA)

Data input setup time, t

su(DATA)

100

600

1300

STOP condition setup time, t

su(STO)

Bus free time, t

(BUF)

Figure 9. I C-Bus Timing Diagram

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charger

ADDRESS

(HEX)

(MSB)

(LSB)

00000 = 0 minutes

10h

(R/W)

0 = Disable

1 = Enable

PTR: Precharge timer

Don’t care

11111 = 136 minutes in 4-minute steps

Default

00000 = 0 minutes

11h

(R/W)

0 = Disable

1 = Enable

CCTR: CC charge timer

11111 = 273 minutes in 8-minute steps

Default

0000 = 0 hours

12h

(R/W)

TCTR: Total charge timer

(CC+CV) register

Don’t care

1111 = 15 hours in 1-hour steps

Default

00h = 0 V

13h

(R/W)

VBOTRH+: Battery over

temperature register at

High+

FFh = 2 V

Default

00h = 0 V

14h

(R/W)

VBOTRH–: Battery over

temperature register at

High–

FFh = 2 V

Default

00h = 0 V

15h

VBOTRL: Battery over

temperature register at low

(R/W)

FFh = 2 V

Default

00h = 0 V

Sensing voltage

Termination current ratio

16h

(R/W)

0 = 4.1 V

1 = 4.2 V

000 = 100 mV

000 = 10%

CSV: Charge current

sensing voltage and

termination current ratio

Don’t care

101 = 200 mV in 20-mV steps

100 = 50% in 10% steps

Default

17h

(R)

ADBV: Battery voltage

VABV = 2 V × 2.5 × Value/256

VADBAT = 2 V × Value/256

VADCIN1 = 2 V × Value/256

VADCIN2 = 2 V × Value/256

ADBT: Battery temperature

voltage

18h

(R)

19h

(R)

ADCIN1: Voltage

ADCIN2: Voltage

1Ah

(R)

charger (continued)

ADDRESS

(HEX)

(MSB)

(LSB)

CHGSTR

0 =

1 = Charger

start

ADC status

0 = Disable

1 = Enable

See Notes 8

and 9

ADC function

0 = Single

1 = Periodically 1 = Enable

See Notes 8

and 9

ADBV

0 = Disable

VTS

ADCIN1

ADCIN2

IRQ

0 = IRQ is L

1 = IRQ is H

0 = Disable

1 = Enable

See Notes 8

and 11

0 = Disable

1 = Enable

See Notes 8

and 11

0 = Disable

1 = Enable

See Notes 8

and 11

1Bh

(R/W)

FCR1: Function control

SR: STATUS register

See Notes 8

and 10

See Note 8

Default

VEXT

BATERR

VBOT

CTERM

NOCHG

1 = A charge

condition,

reset

PCHG

CCTO

TCTO

1 = VCCHG in 1 = Battery

range error

1 = Battery

overvoltage

1 = Charge

current goes

below

1 = Precharge 1 = CC charge 1 = Total

1Ch

(R)

mode

timeout

charge time

(CC+CV) out

termination out CHGSTR to 0.

See Note 12

NOTES: 8. After TWL2213 has finished charging, these values are set to 0.

9. During CHGSTR H, ADC enables and periodically keeps functioning.

10. During charging mode, ADVB is enabled automatically.

11. Charging mode is not necessary to set enable for function.

12. External microprocessor must set CHGSTR bit to 0 when NOCHG = 1

regulator, LED, VIBRATOR

ADDRESS

(HEX)

(MSB)

(LSB)

REG2

REG3

20h

(R/W)

0 = Disable

1 = Enable

000 = 3 V

0 = Disable

1 = Enable

000 = 3 V

FCR2: Function register 2

111 = 2.3 V in 100-mV steps

Default

REG4

REG5

21h

(R/W)

0 = Disable

1 = Enable

000 = 3 V

0 = Disable

1 = Enable

000 = 3 V

FCR3: Function register 3

101 = 2.5 V in 100-mV steps

Default

REG6

22h

(R/W)

0 = Disable

1 = Enable

See Note 13

000 = 3 V

FCR4: Function register 4

FCR5: Function register 5

Don’t care

101 = 2.5 V in 100-mV steps

Default

Vibrator

Ringer

IL2

IL1

IL0

(R/W)

0 = Disable

1 = Enable

0 = Disable

1 = Enable

0 = Disable

1 = Enable

0 = Disable

1 = Enable

0 = Disable

1 = Enable

Don’t care

Default

NOTE 13: CONT = H REG6 is dependent on D7 to enable, CONT = L REG6 is independent of D7, always on after power up

TWL2213CA

POWER SUPPLY MANAGEMENT IC AND

Li-Ion BATTERY CHARGE CONTROL

SLVS280 – MARCH 2001

APPLICATION INFORMATION

DC Input

4.5V to 6.0V

R_SENSE

0.2

C15

.1uF

ZXM64P02X

Q2:1

Q2:2

SI9934DY

100K

SI9934DY

1.2k

RT1

3.74K

Battery Pack

1uF

470pF

RT2

6.19K

–t°

4.7uF

Vibrator

GND

4.7uF .1uF

10K

R10

10K

4.7uF .1uF

C10

4.7uF .1uF

C14

.001uF

C12

4.7uF .1uF

C11

C13

EXT_CONTROLLER

.01uF

GND

C18

4.7uF .1uF

C19

.1uF

C16

C17

4.7uF

GND

100K

.1uF

VREG1

Buzzer

Figure 10. Typical Application Circuit

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SLVS280 – MARCH 2001

APPLICATION INFORMATION

device power supply control (V

)

DD1

The TWL2213 device receives device power by regulating the VCHG input to 4.1 V or 4.2 V, whenever VCHG

is available; otherwise, the device uses the VBAT input directly as device dc supply. The regulated voltage from

VCHG is programmable through the I C interface.

VCHG

VBAT

VG3

VG2

–

Control

Logic

Decode

DD1

TWL2213

BG: Band Gap Voltage

R1: Fixed

R2: Programmable

Figure 11. Device Power Supply

Condition 1: VCHG is on (VG = Active, VG2 = On, VG3 = Off)

R1 ) R2

+ BG

+ 4.1 V or 4.2 V

DD1

TWL2213 device sets R2 value according to the programmed voltage level (4.1 V or 4.2 V).

Condition 2: VCHG is Off and VBAT applied (VG = High, VG2 = Off, VG3 = On)

+ VBAT

DD1

battery charger

The TWL2213 device provides a charger function for single cell Li-Ion battery packs. The charging activity starts

with the battery pack wake-up cycle. If the wake-up cycle completes successfully, the charger starts the

precharge function and slowly charges the battery to 3.2 V. If the battery is charged to 3.2 V within the time limit,

the charger goes into the fast charge mode. The fast charge mode has two phases: 1) constant current mode

(CC) and 2) constant voltage mode (CV). The charger starts CC mode with the maximal charging current until

the battery voltage reaches the regulated voltage level. The charger is then switched to CV mode. During the

CV mode, the TWL2213 device monitors the charging current; once it is below the programmed termination

current level, the charger activity is terminated. The termination current level can be programmed at 10%, 20%,

30%, 40%, or 50% of the maximum charging current at the CC mode.

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SLVS280 – MARCH 2001

APPLICATION INFORMATION

Non-Charging

Mode

Power-Up

VCHG < 4.5 V or

VCHG > 6.5 V

4.5 V < VCHG < 6.5 V

XRST = Low or CHGSTR = Low

Standby

XRST = High and CHGSTR = High

Vbat > 4.3 V

Vbat < 2.0 V or Vbat > 4.45 V

Wake Up

Vbat

3.2 V

Vbat < 3.2 V

Time-Out or

Vbat > 4.45 V

Temperature

Out of Range

Precharge

Temperature In Range

Vbat > 3.2 V

Vbat < 4.1 V or 4.2 V

Temperature Out of Range

CC Time-Out or

Charge

Terminate

Charge

Suspended

Vbat > 4.45 V

Fast-Charge

CC Mode

Temperature In Range

Temperature Out of Range

Temperature In Range

Vbat > 4.1 V / 4.2 V

Fast-Charge

CV Mode

Temperature Out of Range

Vbat > 4.45 V

ICHG > Iterminate

ICHG < Iterminate

or CV Time-Out

and not CV Time-Out

Charge

Complete

Figure 12. Charger State Diagram

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POWER SUPPLY MANAGEMENT IC AND

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SLVS280 – MARCH 2001

APPLICATION INFORMATION

control register—FCR1 (1BH)

BIT

NAME

DESCRIPTION

CHGSTR

Set this bit to 1 to start the charger operation. This bit is cleared if the charger is terminated. (Refer to status

ADC

ENABLE

Set this bit to 1 to enable ADC operation, 0 to stop.

ADC

Set this bit to 1 to have ADC operate continuously. Set to 0 to have ADC to operate one cycle only.

Function

ADBV

VTS

Set this bit to 1 to enable the VBAT input channel to ADC. 0: disable.

Set this bit to 1 to enable the VTS input channel to ADC. 0: disable.

Set this bit to 1 to enable the ADCIN1 input channel.

ADCIN1

ADCIN2

IRQ

Set this bit to 1 to enable the ADCIN2 input channel.

Status of IRQ pin (refer to IRQ operation section).

ADC has four input channels (ADBV, VTS, ADCIN1, ADCIN2). Each channel can be enabled or disabled

individually. The selected channel must be enabled before ADC FUNCTION and ADC ENABLE bits are

enabled, the channel is included in the ADC operation.

IRQ control/status

TWL2213 uses the IRQ signal to inform the external controller about the exception condition of the VCHG input

and the charger status. Bit0 reflects the state of the IRQ signal. IRQ occurs in the following five conditions:

1. VCHG returns to operating range from non_operating range.

2. VCHG goes out of range from operating range.

3. Battery error—occurs only during the charging cycle.

4. Battery temperature out of range—occurs only during the charging cycle. The charger is suspended

temporarily. IRQ is cleared when the temperature returns to normal and the charger resumes automatically.

5. Charge complete.

The controller must clear the IRQ signal by writing 0 to Bit0 in the interrupt service routine, except in the VBOT

condition. The controller may miss the next interrupt if it fails to write the 0. In VBOT condition, TWL2213 clears

the IRQ when the condition goes away.

status register description—SR (1CH)

SR shows the status of the charger. The external controller reads the SR to track the state of the charging

condition.

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SLVS280 – MARCH 2001

BIT

NAME

VEXT

DESCRIPTION

When Vext = 1 the VCHG input is in the operating range. Otherwise the VCHG is out of range.

BATERR

This bit is set to 1 indicating battery error. Four cases cause battery error: pre-charge timeout, constant-current

mode timeout, VBAT < 2.9 V, or VBAT > 4.45 V.

VBOT

During the charging cycle, if the battery temperature exceeds or falls below the nominal range, this sets to 1.

The charger is suspended temporarily. VBOT is cleared when the temperature returns to nominal range and the

charger function resumes automatically.

CTERM

NOCHG

The charger is terminated normally because the charging current is below the preset termination current value.

No charge condition. This condition is detected only during the wake_up state of the charging function. After the

8-second wake up period expires, if VBAT is above 4.3 V, the NOCHG flag is set. The cause of this is a missing

or completely charged battery. The TWL2213 does not deactivate the charger by setting CHGSTR = 0. The

external processor must turn off the CHGSTR by setting it to 0.

PCHG

CCTO

Set to 1 to indicate the charger is in pre-charge state.

Set to 1 to indicate the charging time has exceeded the time limit allowed during CC-mode. This is a fatal error.

TWL2213 clears CHGSTR bit, sets the BATERR flag, and makes IRQ go high to interrupt the external controller.

TCTO

Set to 1 to indicate the charging time has exceeded the overall time limit allowed during CV-mode. This is treated

as normal termination of the charger function. TWL2213 clears the CHGSTR bit and sets IRQ to 1 to interrupt

the external controller.

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SLVS280 – MARCH 2001

IRQ

VCHG out

of Bound

VEXT=1

Yes

Display Error

Message

BATTERR=1

Yes

NOCHG=1

Yes

VBOT

Set CHGSTR

to 0

Yes

Return

CTERM

Yes

Charge

TCTO

Complete

Set IRQ1

to 0

Return

Figure 13. Charger State Diagram

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battery pack wake up

Li-Ion cells can be easily damaged by overcharging or overdischarging. To prevent damage, a pack-protector

device is used within the battery pack. During the charging cycle, if the pack-protector senses an over-voltage

condition, it disconnects the pack from the charger to prevent further charging but allows discharging. During

the discharging cycle, if the protector senses an under-voltage condition, it disconnects the cell from the load

to prevent further discharging.

This phase of the charging cycle provides wake-up capability for the battery pack with a pack-protector device.

At the start of the charge cycle, the TWL2213 device provides a wake-up signal of 1 mA and 4.3 V to the battery

pack. At the end of the 8-second time limit, if the battery pack voltage remains at 4.3 V, a no-battery flag is set

in the status register to signal the condition that the charging path is open. If the battery voltage is below 2.5 V,

a BATTERR flag is set in the status register to signal a bad battery cell. In either case, the charging activity is

halted.

VCHG

DD1

1 mA

No Battery

VBAT

Wake-Up

Enable

Battery

–

Control

Logic

TWL2213

BG = 1.2 V

R1 + R2

BG ×

= 4.3 V

Figure 14. Battery Pack Wake Up

precharge

The TWL2213 device starts the precharge phase when the battery voltage is less than 3.2 V. The precharge

time is limited by the PTR timer. The precharge current level is set by an external resistor. The maximum

precharge current the charger can supply is 100 mA. Use the following equation to choose the external resistor

value.

V_PRE

Ipre

Rpr +

45, V

+ 1.2V " 10%

PRE

Where:

Rpr = External resistor (ohm)

Ipre = Desired precharge current (Amp)

= Voltage at RPRE Pin (Volts)

PRE

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APPLICATION INFORMATION

Rsense

Active

VG2

OFF

DC Input

–

VG3

ISENSE

VBAT

VCHG

Voltage and

Current Regulation

Logic

Constant

Current

Source

Switch

Control

RPRE

Rpr

Precharge Path

TWL2213

Figure 15. Precharge Functional Diagram

fast charge constant current (CC mode)

When the battery voltage is 3.2 V or higher, the TWL2213 device starts the fast charge CC mode cycle. In CC

mode, the charger regulates the charging current to its maximum level. The maximum charging current (Imax)

is determined by the external sense resistor, Rsense, and the voltage, Vsense. Vsense is programmable

through the I C interface (refer to CSV register for programming information). The range of Vsense is from

100 mV to 200 mV, in 20-mV steps. The CC mode charge time is limited by the CCTR timer.

Vsense

Rsense

Imax +

fast charge constant current (CV mode)

When the cell reaches the constant voltage phase, the charger switches to the fast charge CV mode. The

charging current begins tapering down while the charging voltage is regulated at the programmed voltage level

(4.1 V or 4.2 V). The CV mode charging is limited by the TCTR timer.

Fast Charge Path (CC, CV)

Rsense

Active

DC Input

ISENSE

VCHG

VBAT

VG3

–

VG2

Voltage and

Current Regulation

Logic

Switch

Control

TWL2213

Figure 16. Fast Charge Functional Diagram

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APPLICATION INFORMATION

current termination

During the CV mode, the charge cycle is terminated when the charging current is under the programmed

terminated level or when the total charge timer (TCTR) times out. The terminated current level can be

programmed to 10%, 20%, 30%, 40%, or 50% of the charging current at CC mode.

temperature monitoring

The TWL2213 device monitors the battery temperature throughout the charge cycle. The input for ADC

reference voltage is generated by a negative temperature coefficient (NTC) thermistor. The TWL2213 device

compares the ADC input reference voltage to the programmed threshold voltages to determine if charging is

allowed. Three required thresholds are:

VBOTRH+ Voltage for over-temperature cutoff; charging is suspended.

VBORTH– Voltage to resume charging function for over-temperature cutoff.

VBORTL Voltage for low-temperature cutoff; charging is suspended.

Ts (V)

2 V

VBOTRL

VBOTRH–

VBOTRH+

0 V

Charge Condition

Enable

Disabled

Enabled

Disabled

Enabled

Figure 17. Temperature Monitoring

NOTE: The power-up default values are zero for these three thresholds. If the user opts not to use the temperature monitoring function during

the charge cycle, the TS pin of the IC must be tied to the GND to avoid an arror signal.

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TWL2213CA

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SLVS280 – MARCH 2001

maximum time out

The TWL2213 device provides three timers for maximal time allowed for charging. The time is programmable

through I C interface.

TIMER

RANGE

STEP

COMMENT

Precharge timer (PTR)

0–136 min

4 min

During the precharge cycle, if the timer expires before the precharging activity is

complete, a BATT_ERR flag is set in the status register, and the charge is

terminated.

CC charge timer (CCTR)

Total charge timer (TCTR

0–274 min

0–15 hr

8 min

1 hr

During the CC mode cycle, if the timer expires before the CC activity is complete,

a BATT_ERR flag is set in the status register, and the charge is terminated.

Total charge time is defined as the total charge time of CC mode and CV mode.

TCTR time-out occurs only in the CV mode. If the timer expires before, thecharge

is complete.

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POWER SUPPLY MANAGEMENT IC AND

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MECHANICAL DATA

PFB (S-PQFP-G48)

PLASTIC QUAD FLATPACK

0,27

0,17

0,50

0,08

0,13 NOM

5,50 TYP

7,20

Gage Plane

6,80

9,20

8,80

0,25

0,05 MIN

0°–ā7°

1,05

0,95

0,75

0,45

Seating Plane

0,08

1,20 MAX

4073176/B 10/96

NOTES: A. All linear dimensions are in millimeters.

B. This drawing is subject to change without notice.

C. Falls within JEDEC MS-026

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SLVS280 – MARCH 2001

IMPORTANT NOTICE

Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue

any product or service without notice, and advise customers to obtain the latest version of relevant information

to verify, before placing orders, that information being relied on is current and complete. All products are sold

subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those

pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its products to the specifications applicable at the time of sale in accordance with

TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems

necessary to support this warranty. Specific testing of all parameters of each device is not necessarily

performed, except those mandated by government requirements.

Customers are responsible for their applications using TI components.

In order to minimize risks associated with the customer’s applications, adequate design and operating

safeguards must be provided by the customer to minimize inherent or procedural hazards.

TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent

that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other

intellectual property right of TI covering or relating to any combination, machine, or process in which such

products or services might be or are used. TI’s publication of information regarding any third party’s products

or services does not constitute TI’s approval, license, warranty or endorsement thereof.

Reproduction of information in TI data books or data sheets is permissible only if reproduction is without

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or reproduction of this information with alteration voids all warranties provided for an associated TI product or

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Resale of TI’s products or services with statements different from or beyond the parameters stated by TI for

that product or service voids all express and any implied warranties for the associated TI product or service,

is an unfair and deceptive business practice, and TI is not responsible nor liable for any such use.

Also see: Standard Terms and Conditions of Sale for Semiconductor Products. www.ti.com/sc/docs/stdterms.htm

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

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IMPORTANT NOTICE

Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue

any product or service without notice, and advise customers to obtain the latest version of relevant information

to verify, before placing orders, that information being relied on is current and complete. All products are sold

subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those

pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its products to the specifications applicable at the time of sale in accordance with

TI’sstandardwarranty. TestingandotherqualitycontroltechniquesareutilizedtotheextentTIdeemsnecessary

to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except

those mandated by government requirements.