TI TWL2213CA

TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
D Integrated, Single-Chip Solution for Battery
D
D
D
D
D
D
D
Charge Control and Power Supply
Management
Linear Charger for Single-Cell Li-Ion or
Li-Polymer Packs
Integrated Control Over Precharge,
Constant-Current and Constant-Voltage
Charging Phases
Programmable Charging Current
Programmable Charge Termination by
Minimum Current and Time
Battery Temperature Sensing
Pack Wake Up and Damaged Cell Detect
Functions
Safety Charge Timers During Precharge
and Constant-Current Charging
D Six Programmable Low-Dropout Linear
Voltage Regulators
D System Over- and Under-Voltage Shut
D
D
D
D
D
D
Down
Power On/Power Off and Reset Control
Logic
Three Individually Selectable LED Backlight
Drivers
Vibrator and Ringer Drivers
Internal 8-Bit Analog-to-Digital Converter
(ADC) with Auxiliary Inputs
I2C Control Interface
48-Terminal Plastic TQFP(PFB)
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 I2C 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.
Copyright  2001, 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
AVAILABLE OPTIONS
OUTPUT VOLTAGE
TA
DEVICE NAME
PACKAGE
– 40°C to 85°C
TWL2213CAPFBR
TQFP
REGULATOR 1
REGULATOR 6
2.8 V
3V
VG3
VBAT
REF
VG
VG2
V DD
IRQ
CT
GND
RPRE
VCHG
ISENSE
PFB PACKAGE
(TOP VIEW)
36 35 34 33 32 31 30 29 28 27 26 25
37
24
38
23
39
22
40
21
41
20
42
19
43
18
44
17
45
16
46
15
47
14
48
13
5 6 7
8
TS
ADCIN1
ADCIN2
CONT
VREG5
VDD4
VREG4
BGRF
GND2
VREG3
VDD3
VREG2
9 10 11 12
GND
2 3 4
IL0
IL1
IL2
SEL
V DD1
VREG1
1
XRST
AGND
CD1
VREG6
V DD2
PWRKOUT
PWRKIN
PSH
DATA
CLK
CD2
DGND
VIOUT
VDD5
RINGOUT
RINGIN
GND3
DISSIPATION RATING TABLE
2
PACKAGE
TA = 25°C
POWER RATING
OPERATING FACTOR
ABOVE 25°C
TA = 70°C
POWER RATING
TA = 85°C
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
RPRE
ADCIN2
TS
ADCIN1
VBAT
VG3
V DD
ISENSE
VG2
VG
VCHG
block diagram
IRQ
Battery Charger Control
GND
REF
CT
VDD1
AGND
GND
REG1
VREG1
Reference System
BGRF
Reset
Control
PWRKOUT
PWRKIN
PSH
CD2
XRST
CD1
VDD2
REG6
Power
On/Off
Control
VREG6
CONT
VDD3
REG2
VREG2
DATA
I2C
CLK
REG3
DGND
VREG3
VDD4
REG4
VREG4
LED
Driver
Ring
Driver
Vibrator
Driver
REG5
VREG5
POST OFFICE BOX 655303
VIOUT
SEL
RINGIN
RINGOUT
IL0
IL1
IL2
GND3
VDD5
GND2
• DALLAS, TEXAS 75265
3
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
Terminal Functions
TERMINAL
NAME
PFB NO.
ADCIN1
23
ADCIN2
AGND
BGRF
I/O
DESCRIPTION
I
ADC input
22
I
ADC input
8
I/O
Regulator 1 ground
17
I/O
Band gap output bypass capacitance
CD1
9
I/O
XRST output delay adjustment capacitance
CD2
42
I/O
CLK
41
I
Regulator 1 off delay adjustment capacitance
I2C bus serial clock input
CONT
21
I
CT
35
I/O
DATA
40
I/O
External oscillator timing cap
I2C bus serial address/data input output; this is a bidirectional terminal
DGND
Regulator 6 is always on after power up except when CONT = H; regulator 6 is
enabled through I2C interface.
43
I/O
Digital ground
GND
12, 34
I/O
Ground
GND2
16
I/O
Ground for VREG2, VREG3, VREG4, and VREG5
GND3
48
I/O
Vibrator, LED, ringer ground
IL0
1
O
160-mA LED driver output
IL1
2
O
20-mA LED driver output
IL2
3
O
10-mA LED driver output
IRQ
36
O
Interrupt signal for external controller regarding to charger START/STOP action
ISENSE
31
I
Current sense input for charger function
PSH
39
I
Power hold signal from controller
PWRKIN
38
I
Power-up start
PWRKOUT
37
O
Power-up signal for CPU
REF
25
O
Voltage reference during charge cycle, 3 V, IO = 3 mA
RINGIN
47
I/O
Input for ring driver
RINGOUT
46
O
Ring driver output
RPRE
33
I/O
Precharge current sense resistor
SEL
4
I
Input for vibrator output voltage change
TS
24
I
Battery temperature sense input voltage
VBAT
26
I/O
VCHG
32
I
DC voltage input for charger
VDD
VDD1
28
I
Device dc supply feedback for charger function
5
I
Device dc supply input and regulator 1 input
VDD2
VDD3
11
I
Input to regulator 6
Battery voltage sense input or output for precharge, wakeup
14
I
Input for regulators 2 and 3
VDD4
VDD5
19
I
Input for regulators 4 and 5
45
I
Input for vibrator, PN diode connection of ringer
VG
30
O
Gate control of an external P-FET for charger regulation
VG2
29
O
Gate control of an external P-FET for battery blockage
VG3
27
O
Gate control of an external P-FET for charging action
VIOUT
44
I/O
Vibrator output
4
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
NAME
PFB NO.
VREG1
VREG2
I/O
DESCRIPTION
6
O
Regulator 1 output
13
O
Regulator 2 output
VREG3
VREG4
15
O
Regulator 3 output
18
O
Regulator 4 output
VREG5
VREG6
20
O
Regulator 5 output
10
O
Regulator 6 output
XRST
7
O
Reset output
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 VREG1
(regulator 1 output) is enabled. After VREG1 reaches 90% 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. 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
adapter is attached, the output of VREG1 (regulator 1 output) is automatically enabled. After VREG1 reaches 90%
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
5
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
detailed description (continued)
VG3
Battery Attachment
VG2
VDD
PWRKIN
PWRKOUT
0.9 VOUT
VREG1
CD1
Delay
CPU senses this falling
edge and drives PSH to L
CD1
XRST
PSH
CD2
Power Off
Power On
Figure 1. Power-On/-Off Sequence
6
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
VREG1
Adapter Attachment
0.9 VOUT
CD1
Delay
CD1
CPU senses this falling
edge and drives PSH to L
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 VREG1 level.
The delay reset process is started when VREG1 (regulator 1 output) reaches 90% of its nominal output voltage
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 VREG1 drops below 0.9Vnominal – hysteresis, XRST is driven low. If VREG1
reaches 90% of its nominal output voltage level again, the delayed reset process starts over.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
7
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
detailed description (continued)
VREG1
Hysteresis
0.9 VOUT
XRST
CD1
Delay
PSH
CD1
CD2
To keep power on condition PSH
must be high within max CD2 delay.
Figure 3. VREG1 Monitoring of Reset Control
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 I2C/SPI by attaching the CONT terminal to VDD. Attaching
CONT to GND makes this regulator automatically enabled with power on. The output voltage is programmed
by I2C/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 1 Ω– 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 I2C. 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 I2C. The output voltage can be selected by tying the SEL terminal to VDD or GND. If the SEL terminal
is tied to VDD, the output voltage is set to 3 V. If the SEL terminal is tied to GND, the output voltage is set to 1.3
V.
8
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 I2C, 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 I2C and uses an N-channel FET
with a maximum resistance of 3 Ω.
I2C
This block provides I2C 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, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 25°C to 150°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 150°C
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
VCHG
VDD1 – VDD5
High-level logic input, PWRKIN, SEL, CONT
Low-level logic input, PWRKIN, SEL, CONT
High-level logic input, PSH
Low-level logic input, PSH
Precharge current
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
MIN
MAX
UNIT
4.5
6
V
3.3
4.3
V
0.7VDD1
GND
VDD1
0.3VDD1
V
0.7VREG1
GND
VREG1
0.3VREG1
100
V
V
V
mA
9
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
electrical characteristics
regulator 1 (CO = 4.7 µF with ESR = 2 Ω)
PARAMETER
VREG1
IO
Output voltage
Ios
Short circuit
Output current
Load regulation
Line regulation
kVIO
I(Standby)
TEST CONDITIONS
IO = IMAX
VDD1 = 3.8 V
MIN
TYP
MAX
UNIT
2.68
2.8
2.91
V
150
mA
550
mA
80
mV
20
mV
300
mV
VDD1 = 3.8 V
IO = 1 mA to IMAX, VDD1 = 3.8 V
Dropout voltage
VDD1 = 3.3 V to 4.3 V, IO = IMAX
IO = IMAX
Ripple rejection
f = 120 Hz, VDD1 = 3.8 V
Standby current
IO = 1.5 mA (regulator 1 and internal bias circuitry are
active)
100
40
dB
120
µA
regulator 6 (CO = 4.7 µF with ESR = 2 Ω)
This 100 mA LDO can be enabled with serial interface I2C or by the CONT terminal. The output range is from
2.5 V to 3 V.
PARAMETER
TEST CONDITIONS
CONT = Low
VREG6
Output voltage
IO
Output current
CONT = High (see Note 1 and function register 4)
MIN
TYP
VS
Line regulation
2.88
3
3.12
Vp
1.04Vp
100
mA
330
mA
70
mV
20
mV
Dropout voltage
300
mV
IO = 1 mA to IMAX, VDD2 = 3.8 V
VDD2 = 3.3 V to 4.3 V, IO = IMAX
KVIO
ton
Ripple rejection
IO = IMAX
f = 120 Hz
Turnon time
See Note 2
toff
I(Quiescent)
Turnoff time
See Note 3
UNIT
0.96Vp
Short circuit
Load regulation
MAX
100
40
V
V
dB
150
µs
5
ms
Quiescent current
IO = 1.5 mA
30
2
NOTES: 1. I C-programmable. V(p) is the programmed voltage. Refer to function registers 2 and 3 for programming information.
2. Output enable to output voltage = 0.9 × nominal value
3. Output disable to output voltage = 0.5 V
µA
10
POST OFFICE BOX 655303
2
• 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 (CO = 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
VO
Output voltage
TEST CONDITIONS
See Note 1
MIN
TYP
0.96Vp
Vp
Regulator 2
IO
Output current
Short circuit current
Short-circuit
Load regulation
Line regulation
MAX
UNIT
1.04Vp
80
V
Regulator 3
80
Regulator 4
120
Regulator 5
150
Regulator 2
300
Regulator 3
300
Regulator 4
400
Regulator 5
500
mA
mA
Regulator 2, IO = 1 mA to IMAX
70
Regulator 4, IO = 1 mA to IMAX
50
Regulators 3 and 5, IO = 1 mA to IMAX
50
20
mV
300
mV
80
µVRMS
µs
5
ms
150
µA
V(dropout)
KVIO
Dropout voltage
VI = 3.3 V to 4.3 V
IO = IMAX
Ripple rejection
f = 10 kHz
N
Output noise
f = 10 Hz to 100 kHz, IO = IMAX, VI = 3.3 V
ton
toff
Turnon time
See Note 2
Turnoff time
No load, See Note 3
I(Quiescent)
Quiescent current
IO = 1 mA
40
mV
dB
45
1
regulator 1 voltage DET
PARAMETER
VO
Voltage at XRST (see Note 4)
VHY
Hysteresis Voltage
TEST CONDITIONS
MIN
VREG1 ≤ VTH –VHY
VREG1 ≥ VTH
TYP
MAX
0
UNIT
0.3
V
80
VREG1
100
120
Time delay voltage at CD1
1.15
1.2
1.25
V
Time delay current at CD1
0.7
1
1.3
µA
TYP
MAX
UNIT
VIL0 = 0.8 V
VIL1 = 0.8 V
160
mA
20
mA
VIL2 = 0.8 V
Off
10
mA
1
µA
mV
NOTE 4: VTH is 90% of the nominal VREG1.
LED driver
PARAMETER
Output current at IL0
Output current at IL1
Output current at IL2
Ilkg
Leakage current
TEST CONDITIONS
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
MIN
11
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
electrical characteristics (continued)
vibrator driver
PARAMETER
TEST CONDITIONS
VO
IO
Output voltage
SEL = H
Output current
SEL = H
VO
IO
Output voltage
SEL = L
Output current
SEL = L
Vs
Line regulation
Load regulation
I(Quiescent)
IL
Quiescent current
Current limit
MIN
TYP
2.88
3
MAX
3.12
85
1.17
1.3
UNIT
V
mA
1.43
V
140
mA
VDD5 = 3.3 V to 4.3 V, IOUT = IMAX
IOUT = 1 mA to IMAX, VDD5 = 3.8 V
20
mV
80
mV
IOUT = 0
VO = 0, VDD5 = 3.3 V to 4.3 V
80
µA
490
mA
ring driver
PARAMETER
On resistance
Ilkg
Leakage current
TEST CONDITIONS
MIN
TYP
MAX
Iout = 100 mA at 25°C
Off
UNIT
3
Ω
1
µΑ
battery charger control
PARAMETER
VDD1
System VDD
Required 0.1 µF capacitor ESR of 2 Ω , load = 1 mA
maximum
VREF
V(current sense)
VG
TEST CONDITIONS
V(BREG) = 4.1 V
V(BREG) = 4.2 V (see function control register)
Current sense voltage
Set maximum current, 100 to 200, in 20-mV steps with
I2C. See CSV register.
VGH
VGL
VG2
IG2
VG3
IG3
12
IGL
TYP
MAX
4.1
4.141
4.158
4.2
4.242
2.91
3
3.09
UNIT
V
V
Vsense
mV
IGH = –0 mA
VCHG
V
IGL = –0 mA
0
V
IGH
IG
MIN
4.059
VG = 2 V
149
178.5
197
214
218
226
VG2H
IG2H = 0 mA
VBAT
VG2L
IG2L = 0 mA
0
IG2H
VG2 = VBAT – 0.3 V
IG2L
VG2 = 0.3 V
VG3H
IG3H = –0 mA
VG3L
IG3L = 0 mA
IG3H
VG3 = VDD1 – 0.3 V
–2.7
–3.87
–4.65
IG3L
VG3 = 0.3 V
2.95
4.43
5.3
POST OFFICE BOX 655303
V
–2.8
–4.03
–4.65
3.2
5.02
5.70
VDD1
0
• DALLAS, TEXAS 75265
µA
A
mA
V
mA
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
electrical characteristics (continued)
battery charger control (continued)
PARAMETER
TEST CONDITIONS
V(BREG) = 4.1 V (See Note 5)
VBREG = 4.2 V
VBAT regulation (CV)
VBAT
MIN
TYP
MAX
4.059
4.1
4.141
4.158
4.2
4.242
Low voltage cutoff
1.9
High voltage cutoff
4.45
Fast charge voltage
3.2
Precharge voltage
(see Note 6)
Pack wake-up voltage
V
V
1.9
2.05
2.2
4.214
4.30
4.386
Icc
Operating current
NOTES: 5. V(BREG) is the regulated battery voltage programmed by setting bit1 of CSV register.
6. Precharge current set by I pre + VRPC 45
where V
+ 1.2 V " 10%
RPC
RPC
UNIT
20
mA
ADC specification
PARAMETER
TEST CONDITIONS
MIN
TYP
Resolution
Output impedance < 100 kΩ
Integral nonlinearity
Confirm monotonous (see Note 7)
Low-level input
ADC output = 00H
0
High-level input
ADC output = FFH
1.9
2
450
500
MAX
UNIT
1
LSB
8
–1
Input capacitance
bit
0.1
V
2.1
V
550
kHz
3
ADC CLK
ADC conversion time, tc
From the start of SETUP
Power-up time
From the ADEN up selection
pF
16
CLK
10
µs
NOTE 7: LSB + 2V + 7.8 mV
255
logic level output
PARAMETER
TEST CONDITION
MIN
MAX
UNIT
0.8VREG1
GND
V
V
VOH of terminals PWRKOUT, IRQ
VOL of terminals PWRKOUT, IRQ
IOH = –2 mA
IOL = 2 mA
VOL of DATA
VOH of XRST
IOL = 2 mA
IOH = –2 mA (open drain with 100-kΩ internal pullup)
GND
VREG1
0.22VREG1
0.22VREG1
VOL of XRST
IOL = 2 mA (open drain 100-kΩ internal pullup)
GND
VREG1
0.22VREG1
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
V
V
V
13
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
I2C bus protocols
The TWL2213 serial interface is designed to be I2C bus compatible, operating in the slave mode. This interface
consists of the following terminals:
CLK: I2C bus serial clock. This input synchronizes the control data transfer from and to the microprocessor.
DATA: I2C bus serial address/data input/output. This is a bidirectional terminal that transfers registers,
control addresses, and data into and out of the microprocessor. This terminal is an open drain and requires a
pullup resistor of 10 kΩ to VREG1.
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 I2C Bus
14
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
I2C bus protocols (continued)
DATA
CLK
S
P
START Condition
STOP Condition
Figure 5. START and STOP Conditions
CLK
DATA
A6
A5
A4
A0 R/W
ACK
0
R7
R5
R0 ACK
D7
D6
D5
D0
ACK
0
0
Slave Address
Start
R6
0
Register Address
Stop
Data
NOTE: SLAVE = TWL2213
Figure 6. I2C Bus Write to TWL2213 Device
CLK
A6
DATA
A5
A0 R/W ACK
1
Start
R7
R6
R0 ACK
A6
A0
0
R/W ACK
1
Slave Address
Register Address
D7
D6
D0 ACK
0
Slave Address
Slave Drives
the Data
Repeated
Start
NOTE: SLAVE = TWL2213
Stop
Master
Drives
ACK and Stop
Figure 7. I2C Read From TWL2213 Protocol A
CLK
DATA
A6 A5
A0 R/W ACK
1
Start
Slave Address
R7
R6
R0 ACK
0
A6
A0 R/W ACK D7
A5
Stop Start
Register Address
Slave Address
NOTE: SLAVE = TWL2213
D0 ACK
Slave Drives
the Data
Stop
Master
Drives
ACK and Stop
Figure 8. I2C Read From TWL2213 Protocol B
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
15
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
I2C timing
DATA
t(BUF)
th(STA)
t(LOW)
tr
tf
CLK
th(STA)
STO
STA
t(HIGH)
th(DATA)
tsu(STA)
tsu(DATA)
tsu(STO)
STA
STO
MIN
Clock frequency, fmax
MAX
400
Clock high time, twH(HIGH)
Clock low time, twL(LOW)
UNIT
kHz
600
ns
1300
ns
DATA and CLK rise time, tr
300
ns
DATA and CLK fall time, tf
300
ns
Hold time (repeated) START condition (after this period the first clock pulse is generated), th(STA)
600
ns
Setup time for repeated START condition, th(DATA)
600
ns
0
ns
Data input setup time, tsu(DATA)
100
ns
STOP condition setup time, tsu(STO)
600
ns
1300
ns
Data input hold time, th(DATA)
Bus free time, t(BUF)
Figure 9. I2C-Bus Timing Diagram
16
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
register map
charger
REGISTER
PTR: Precharge timer
register
ADDRESS
(HEX)
10h
(R/W)
Default
CCTR: CC charge timer
register
11h
(R/W)
Default
12h
(R/W)
Default
VBOTRH+: Battery over
temperature register at
High+
VBOTRH–: Battery over
temperature register at
High
High–
VBOTRL: Battery over
temperature
tem
erature register at low
CSV: Charge current
sensing voltage and
termination current ratio
0 = Disable
1 = Enable
0
0 = Disable
1 = Enable
0
D6
D4
D3
D2
0
0
Don’t care
0
0
0
00000 = 0 minutes
L
11111 = 273 minutes in 8-minute steps
0
0
Don’t care
0
0
0
0000 = 0 hours
L
1111 = 15 hours in 1-hour steps
1
1
13h
(R/W)
Default
00h = 0 V
14h
(R/W)
00h = 0 V
L
FFh = 2 V
Default
00h = 0 V
15h
(R/W)
00h = 0 V
L
FFh = 2 V
Default
00h = 0 V
16h
(R/W)
Sensing voltage
000 = 100 mV
L
101 = 200 mV in 20-mV steps
0
0
VABV = 2 V × 2.5 × Value/256
ADBT: Battery temperature
voltage
18h
(R)
VADBAT = 2 V × Value/256
ADCIN1: Voltage
19h
(R)
VADCIN1 = 2 V × Value/256
ADCIN2: Voltage
1Ah
(R)
VADCIN2 = 2 V × Value/256
Don’t care
1
1
Termination current ratio
000 = 10%
L
100 = 50% in 10% steps
0
0
0
0 = 4.1 V
1 = 4.2 V
0
0
Don’t care
SLVS280 – MARCH 2001
ADBV: Battery voltage
17h
(R)
D0
(LSB)
D1
00000 = 0 minutes
L
11111 = 136 minutes in 4-minute steps
00h = 0 V
L
FFh = 2 V
Default
D5
17
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TCTR: Total charge timer
(CC+CV) register
D7
(MSB)
FCR1: Function control
ADDRESS
(HEX)
1Bh
(R/W)
Default
SR: STATUS register
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
NOTES: 8.
9.
10.
11.
12.
1Ch
(R)
D7
(MSB)
CHGSTR
0=
1 = Charger
start
See Note 8
0
D6
ADC status
0 = Disable
1 = Enable
See Notes 8
and 9
D5
ADC function
0 = Single
1 = Periodically
See Notes 8
and 9
0
VEXT
1 = VCCHG in
range
0
BATERR
1 = Battery
error
VBOT
1 = Battery
overvoltage
D4
ADBV
0 = Disable
1 = Enable
See Notes 8
and 10
D3
VTS
0 = Disable
1 = Enable
See Notes 8
and 11
D2
D1
ADCIN1
0 = Disable
1 = Enable
See Notes 8
and 11
ADCIN2
0 = Disable
1 = Enable
See Notes 8
and 11
0
0
0
0
CTERM
1 = Charge
current goes
below
termination out
NOCHG
1 = A charge
condition,
reset
CHGSTR to 0.
See Note 12
PCHG
1 = Precharge
mode
CCTO
1 = CC charge
timeout
D3
D2
D1
D0
(LSB)
IRQ
0 = IRQ is L
1 = IRQ is H
0
TCTO
1 = Total
charge time
(CC+CV) out
After TWL2213 has finished charging, these values are set to 0.
During CHGSTR H, ADC enables and periodically keeps functioning.
During charging mode, ADVB is enabled automatically.
Charging mode is not necessary to set enable for function.
External microprocessor must set CHGSTR bit to 0 when NOCHG = 1
regulator, LED, VIBRATOR
REGISTER
ADDRESS
(HEX)
D7
(MSB)
D6
D5
D4
REG2
FCR2: Function register 2
20h
(R/W)
Default
0 = Disable
1 = Enable
0
REG3
000 = 3 V
L
111 = 2.3 V in 100-mV steps
0
0
0 = Disable
1 = Enable
0
0
000 = 3 V
L
111 = 2.3 V in 100-mV steps
0
REG4
FCR3: Function register 3
21h
(R/W)
Default
0 = Disable
1 = Enable
0
0
0
0 = Disable
1 = Enable
0
0
000 = 3 V
L
101 = 2.5 V in 100-mV steps
0
0
REG6
FCR4: Function register 4
22h
(R/W)
Default
FCR5: Function register 5
23
(R/W)
Default
0 = Disable
1 = Enable
See Note 13
000 = 3 V
L
101 = 2.5 V in 100-mV steps
Don’t care
0
0
0
0
Vibrator
Ringer
IL2
IL1
0 = Disable
1 = Enable
0 = Disable
1 = Enable
0
0
0
REG5
000 = 3 V
L
101 = 2.5 V in 100-mV steps
0
D0
(LSB)
0 = Disable
1 = Enable
0
0 = Disable
1 = Enable
0
IL0
0 = Disable
1 = Enable
0
NOTE 13: CONT = H REG6 is dependent on D7 to enable, CONT = L REG6 is independent of D7, always on after power up
Don’t care
0
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
REGISTER
SLVS280 – MARCH 2001
18
charger (continued)
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
Q3 5
6
7
8
D
ZXM64P02X
3
2
1
R4
S
1M
C15
.1uF
Q2:1
Q2:2
4 G
R5
SI9934DY
100K
SI9934DY
R6
1K
R7
1.2k
RT1
3.74K
Battery Pack
C4
C1
1uF
470pF
RT2
6.19K
–t°
NTC
C2
4.7uF
Vibrator
To
VDD or
GND
S1
C5
R8
10K
C7
R10
10K
4.7uF
C9
C14
.001uF
C11
4.7uF
C12
4.7uF
C8
4.7uF
C6
.1uF
.1uF
C10
.1uF
.1uF
C13
EXT_CONTROLLER
.01uF
To
VDD or
GND
C16
C18
C19
4.7uF
.1uF
.1uF
C17
4.7uF
R3
To
V DD or
R9
100K
R2
GND
R1
C3
VREG1
Buzzer
.1uF
Figure 10. Typical Application Circuit
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
19
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
APPLICATION INFORMATION
device power supply control (VDD1)
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 I2C interface.
VCHG
RS
VBAT
VG
BG
V DD
VG3
VG2
VDD
+
_
+
–
Control
Logic
Decode
R1
R2
V 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)
V
DD1
+ BG
R1 ) R2 + 4.1 V or 4.2 V
R2
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)
V
DD1
+ VBAT
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.
20
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
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
V bat < 3.2 V
Vbat < 3.2 V
Temperature
Out of Range
Time-Out or
Vbat > 4.45 V
Precharge
Temperature In Range
Vbat < 4.1 V or 4.2 V
Vbat > 3.2 V
Temperature Out of Range
Charge
Suspended
Temperature In Range
Fast-Charge
CC Mode
CC Time-Out or
Vbat > 4.45 V
Terminate
Charge
Temperature Out of Range
Temperature In Range
Temperature Out of Range
ICHG > Iterminate
and not CV Time-Out
Vbat > 4.1 V / 4.2 V
Fast-Charge
CV Mode
Vbat > 4.45 V
ICHG < Iterminate
or CV Time-Out
Charge
Complete
Figure 12. Charger State Diagram
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
21
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
APPLICATION INFORMATION
control register—FCR1 (1BH)
BIT
NAME
DESCRIPTION
7
CHGSTR
Set this bit to 1 to start the charger operation. This bit is cleared if the charger is terminated. (Refer to status
register table below for terminated conditions)
6
ADC
ENABLE
Set this bit to 1 to enable ADC operation, 0 to stop.
5
ADC
Function
Set this bit to 1 to have ADC operate continuously. Set to 0 to have ADC to operate one cycle only.
4
ADBV
Set this bit to 1 to enable the VBAT input channel to ADC. 0: disable.
3
VTS
Set this bit to 1 to enable the VTS input channel to ADC. 0: disable.
2
ADCIN1
Set this bit to 1 to enable the ADCIN1 input channel.
1
ADCIN2
Set this bit to 1 to enable the ADCIN2 input channel.
0
IRQ
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.
22
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
BIT
NAME
7
VEXT
DESCRIPTION
6
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.
5
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.
4
CTERM
The charger is terminated normally because the charging current is below the preset termination current value.
3
NOCHG
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.
2
PCHG
Set to 1 to indicate the charger is in pre-charge state.
1
CCTO
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.
0
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.
When Vext = 1 the VCHG input is in the operating range. Otherwise the VCHG is out of range.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
23
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
IRQ
No
VEXT=1
VCHG out
of Bound
Yes
1
Yes
Display Error
Message
No
BATTERR=1
Yes
No
NOCHG=1
1
Yes
No
VBOT
Set CHGSTR
to 0
No
Yes
Return
CTERM
Yes
TCTO
1
Charge
Complete
No
1
1
1
Set IRQ1
to 0
Return
Figure 13. Charger State Diagram
24
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
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
V DD1
1 mA
BG
_
+
_
No Battery
+
VBAT
+
Wake-Up
Enable
R1
Battery
–
R2
Control
Logic
TWL2213
BG = 1.2 V
R1 + R2
BG ×
= 4.3 V
R2
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.
Rpr +
V PRE
Ipre
45, V PRE + 1.2V " 10%
Where:
Rpr = External resistor (ohm)
Ipre = Desired precharge current (Amp)
VPRE = Voltage at RPRE Pin (Volts)
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
25
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
APPLICATION INFORMATION
Rsense
Active
DC Input
ON
VG
VCHG
OFF
VG2
+
VG3
ISENSE
–
VBAT
VDD
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 I2C 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.
Imax + Vsense
Rsense
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
DC Input
Active
ON
ON
+
VCHG
ISENSE
VG
VG2
VDD
Voltage and
Current Regulation
Logic
VG3
VBAT
Switch
Control
TWL2213
Figure 16. Fast Charge Functional Diagram
26
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
–
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
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:
D VBOTRH+ Voltage for over-temperature cutoff; charging is suspended.
D VBORTH– Voltage to resume charging function for over-temperature cutoff.
D VBORTL Voltage for low-temperature cutoff; charging is suspended.
Ts (V)
2V
VBOTRL
VBOTRH–
VBOTRH+
0V
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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
27
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
maximum time out
The TWL2213 device provides three timers for maximal time allowed for charging. The time is programmable
through I2C interface.
TIMER
28
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)
0–274 min
8 min
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 timer (TCTR
0–15 hr
1 hr
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, the charge
is complete.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
SLVS280 – MARCH 2001
MECHANICAL DATA
PFB (S-PQFP-G48)
PLASTIC QUAD FLATPACK
0,27
0,17
0,50
36
0,08 M
25
37
24
48
13
0,13 NOM
1
12
5,50 TYP
7,20
SQ
6,80
9,20
SQ
8,80
Gage Plane
0,25
0,05 MIN
0°–ā7°
1,05
0,95
Seating Plane
0,75
0,45
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
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
29
TWL2213CA
POWER SUPPLY MANAGEMENT IC AND
Li-Ion BATTERY CHARGE CONTROL
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
alteration and is accompanied by all associated warranties, conditions, limitations and notices. Representation
or reproduction of this information with alteration voids all warranties provided for an associated TI product or
service, is an unfair and deceptive business practice, and TI is not responsible nor liable for any such use.
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
Copyright  2001, Texas Instruments Incorporated
30
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
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
alteration and is accompanied by all associated warranties, conditions, limitations and notices. Representation
or reproduction of this information with alteration voids all warranties provided for an associated TI product or
service, is an unfair and deceptive business practice, and TI is not responsible nor liable for any such use.
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
Copyright  2001, Texas Instruments Incorporated