TWL2214CA
POWER SUPPLY MANAGEMENT IC AND
Li Ion BATTERY CHARGE CONTROL
SLVS321A OCTOBER 2001 REVISED JANUARY 2002
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
features
D
Integrated, Single-Chip Solution for Battery
Charge Control and Power Supply
Management
D
Linear Charger for Single-Cell Li-Ion or
Li-Polymer Packs
D
Integrated Control over Precharge,
Constant-Current, and Constant-Voltage
Charging Phases
D
Programmable Charge Termination by
Minimum Current and Time
D
Battery Temperature Sensing
D
Pack Wake-Up and Damaged Cell Detect
Functions
D
Safety Charge Timers During Precharge
and Constant-Current Charging
D
Programmable Charging Current
D
Six Programmable Low-Dropout Linear
Voltage Regulators
D
Over 65-dB Power Supply Rejection Ratio
(PSRR) From 10 Hz to 10 kHz
D
System Over- and Under-Voltage Shutdown
D
Power On/Off and Reset Control Logic
D
Three Individually Selectable LED Backlight
Drivers
D
Vibrator and Ringer Drivers
D
Internal 8-Bit Analog-to-Digital Converter
With Auxiliary Inputs
D
I
2
C Control Interface and Three-Wire SPI
Interface
D
48-Terminal Plastic TQFP (PFB) or
MicroStar Junior BGA
(GQE) Package
description
The TWL2214CA device is a single-chip battery and power management solution for wireless handsets, pagers,
personal digital 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
TWL2214CA device initiates battery pack wake-up and damaged cell detect functions. For deeply discharged
batteries, the device performs precharge conditioning by trickle charge to a user-defined current setting. Once
an acceptable pack voltage is detected, the TWL2214CA device applies a constant-current fast charge at a
current level that is determined by the combination of an external sense resistor and user-programmable sense
voltage. When the battery reaches the selected charge regulation voltage, the TWL2214CA device maintains
regulation until charging is terminated by a minimum current or a timer. During the entire charge cycle, the
TWL2214CA device 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 TWL2214CA device includes six low-dropout linear voltage regulators. One
regulator is driven from the device power-on/-off logic and incorporates a microcontroller reset function. Five
low-noise regulators include individually programmable output voltage and enable-disable. The TWL2214CA
device can be powered from a battery or from an ac adapter. When an adapter is present, it supplies power to
the device, allowing the system to function without a battery.
The TWL2214CA device 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 terminals.
All TWL2214CA programming and status are accessed by the system microcontroller via the I
2
C/SPI serial
interface.
The TWL2214CA device is packaged in the Texas Instruments 48-terminal plastic thin quad flatpack (TQFP)
(PFB) or the MicroStar Junior BGA
(GQE) package.
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.
Copyright
2002, Texas Instruments Incorporated
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.
MicroStar Junior BGA is a trademark of Texas Instruments Incorporated.
TWL2214CA
POWER SUPPLY MANAGEMENT IC AND
Li Ion BATTERY CHARGE CONTROL
SLVS321A OCTOBER 2001 REVISED JANUARY 2002
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
AVAILABLE OPTIONS
T
DEVICE NAME
PACKAGE
OUTPUT VOLTAGE
INTERFACE
TA
DEVICE NAME
PACKAGE
REGULATOR 1
REGULATOR 6
INTERFACE
40
C to 85
C
TWL2214CAPFBR
TQFP
2.8 V
3 V
I2C
40
C to 85
C
TWL2214CAGQER
MicroStar Junior BGA
2.8 V
3 V
I2C/SPI
9
8
7
6
5
J
H
G
F
E
D
3
2
1
C
B
A
4
GQE PACKAGE
(BOTTOM VIEW)
2
3
TS
ADCIN1
ADCIN2
CONT
V
REG5
V
DD4
V
REG4
BGRF
GND2
V
REG3
V
DD3
V
REG2
24
23
22
21
20
19
18
17
16
15
14
13
4
37
38
39
40
41
42
43
44
45
46
47
48
PWRKOUT
PWRKIN
PSH
DATA
CLK
CD2
DGND
VIOUT
V
DD5
RINGOUT
RINGIN
GND3
5
6
7
8
35 34 33 32 31
36
30
28 27 26
29
9 10 11 12
25
1
PFB PACKAGE
(TOP VIEW)
IRQ
CT
GND
RPRE
V
CHG
ISENSE
VG
VG2
V
DD
VG3
V
BA
T
REF
IL0
IL1
IL2
SEL
V
DD1
V
REG1
XRST
AGND
CD1
V
REG6
V
DD2
GND
DISSIPATION RATING TABLE
PACKAGE
TA = 25
C
POWER RATING
OPERATING FACTOR
ABOVE 25
C
TA = 70
C
POWER RATING
TA = 85
C
POWER RATING
GQE
1176 mW
11.8 mW/
C
647 mW
471 mW
PFB
1962 mW
15.7 mW/
C
1256 mW
1020 mW
TWL2214CA
POWER SUPPLY MANAGEMENT IC AND
Li Ion BATTERY CHARGE CONTROL
SLVS321A OCTOBER 2001 REVISED JANUARY 2002
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
block diagram
VCHG
VG
VG2
ISENSE
V
DD
VG3
VBA
T
ADCIN1
IRQ
Battery Charger Control
GND
REF
CT
VDD1
XRST
CD1
VDD2
AGND
VDD3
VREG2
VREG3
VDD4
VREG4
REG5
VREG5
GND2
Vibrator
Driver
Ring
Driver
LED
Driver
DGND
I2C
GND
DATA
CLK
CD2
PWRKIN
PSH
PWRKOUT
BGRF
REG4
REG3
REG2
REG6
Reset
Control
REG1
Power
On/Off
Control
CONT
VREG6
VREG1
TS
ADCIN2
RPRE
GND3
IL2
IL1
IL0
RINGOUT
RINGIN
SEL
VIOUT
DD5
V
Reference System
CE
TWL2214CA
POWER SUPPLY MANAGEMENT IC AND
Li Ion BATTERY CHARGE CONTROL
SLVS321A OCTOBER 2001 REVISED JANUARY 2002
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
GQE NO.
PFB NO.
I/O
DESCRIPTION
ADCIN1
J8
23
I
ADC input
ADCIN2
J7
22
I
ADC input
AGND
C4, D3,
D4, E3, E4
8
I/O
Regulator 1 ground
BGRF
J4
17
I/O
Band gap output bypass capacitance
CD1
F1
9
I/O
XRST output delay adjustment capacitance
CD2
A5
42
I/O
Regulator 1 off delay adjustment capacitance
CE
A8
I
Clock enabled
CLK
B5
41
I
I2C/SPI bus serial clock input
CONT
H6
21
I
Regulator 6 is always on after power up except when CONT = H; regulator 6 is
enabled through I2C interface.
CT
B9
35
I/O
External oscillator timing cap
DATA
A6
40
I/O
I2C/SPI bus serial address/data input output; this is a bidirectional terminal.
DGND
A4
43
I/O
Digital ground
GND
C8, G2
12, 34
I/O
Ground
GND2
H4
16
I/O
Ground for VREG2, VREG3, VREG4, and VREG5
GND3
B2
48
I/O
Ground for vibrator, LED, and ringer
IL0
B1
1
O
160-mA LED driver output
IL1
C2
2
O
20-mA LED driver output
IL2
C1
3
O
10-mA LED driver output
IRQ
B8
36
O
Interrupt signal for external controller regarding to charger start/stop action
ISENSE
E9
31
I
Current sense input for charger function
PSH
B6
39
I
Power hold signal from controller
PWRKIN
A7
38
I
Power-up start
PWRKOUT
B7
37
O
Power-up signal for CPU
REF
H9
25
O
Voltage reference during charge cycle, 3 V, IO = 3 mA
RINGIN
A2
47
I/O
Input for ring driver
RINGOUT
B3
46
O
Ring driver output
RPRE
C9
33
I/O
Precharge current sense resistor
SEL
D2
4
I
Input for vibrator output voltage change
TS
H8
24
I
Battery temperature sense input voltage
VBAT
G8
26
I/O
Battery voltage sense input or output for precharge, wakeup
VCHG
D9
32
I
DC voltage input for charger
VDD
F8
28
I
Device dc supply feedback for charger function
VDD1
D1
5
I
Device dc supply input and regulator 1 input
VDD2
G1
11
I
Input to regulator 6
VDD3
J2
14
I
Input for regulators 2 and 3
VDD4
J5
19
I
Input for regulators 4 and 5
VDD5
A3
45
I
Input for vibrator, PN diode connection of ringer
VG
E8
30
O
Gate control of an external P-FET for charger regulation
VG2
F9
29
O
Gate control of an external P-FET for battery blockage
TWL2214CA
POWER SUPPLY MANAGEMENT IC AND
Li Ion BATTERY CHARGE CONTROL
SLVS321A OCTOBER 2001 REVISED JANUARY 2002
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Terminal Functions (Continued)
TERMINAL
I/O
DESCRIPTION
NAME
GQE NO.
PFB NO.
I/O
DESCRIPTION
VG3
G9
27
O
Gate control of an external P-FET for charging action
VIOUT
B4
44
I/O
Vibrator output
VREG1
E2
6
O
Regulator 1 output
VREG2
H2
13
O
Regulator 2 output
VREG3
J3
15
O
Regulator 3 output
VREG4
H5
18
O
Regulator 4 output
VREG5
J6
20
O
Regulator 5 output
VREG6
F2
10
O
Regulator 6 output
XRST
E1
7
O
Reset output
detailed description
power-on/-off control
The timing of the delayed power-on reset is controlled by the power-on/-off control circuit. There are two different
conditions to power-on the device: manual power on and automatic power on.
manual power on
During the power-off state, after the power key is pressed, the PWRKIN signal becomes high and the output
of V
REG1
(regulator 1 output) is enabled. When the V
REG1
output reaches 90% of its nominal output voltage,
the TWL2214CA device 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 the TWL2214CA device and pulled high by
an external pull-up resistor. The reset process is completed, and the external controller operates in normal
condition. While PWRKIN remains high, the power-on condition remains active. Before PWRKIN goes low, the
external controller must drive PSH high to retain power; otherwise, the TWL2214CA device starts the delay
power-off process by charging timing capacitor CD2. After the voltage of CD2 reaches 1.2 V and no valid PSH
signal is received, the device is powered off.
automatic power on
During the power-off state, after the adapter is attached, the output of V
REG1
is automatically enabled. When
V
REG1
reaches 90% of its nominal output voltage, the TWL2214CA device starts the delayed reset process by
charging the reset timing capacitor (CD1). When the voltage of the CD1 reaches 1.2 V, the XRST signal is
released by the TWL2214CA device and pulled high by an external pull-up resistor. The reset process is
completed and the external controller operates in normal condition. The external controller must drive PSH to
high in time to retain power; otherwise, the TWL2214CA device starts the delay power-off process by charging
timing capacitor CD2. After voltage of CD2 reaches 1.2 V and if no valid PSH signal is received, the device is
powered off.
During the on state, the device generates an output signal PWRKOUT with an inverted polarity to PWRKIN. An
external controller can use PWRKOUT to sense whether the power key has been pressed.
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