Eutech EUP8020X Dual source ac/usb li-ion/polymer charger ic for portable application Datasheet

EUP8020X
Dual Source AC/USB Li-Ion/Polymer
Charger IC for Portable Applications
DESCRIPTION
FEATURES
The EUP8020X series are highly integrated single cell
Li-Ion/Polymer battery charger IC designed for handheld
devices. The EUP8020X accepts two power inputs,
normally one from a USB port and another one from
AC-adaptor. The EUP8020X automatically selects the
USB-Port or the AC-adapter as the power source for the
system. In the USB configuration, the host can select from
the two preset charge rates of 100 mA and 500 mA. In the
AC−adapter configuration an external resistor sets the
magnitude of the charge current, which may be
programmed up to 1A.
The EUP8020X charges the battery in three phases:
conditioning, constant current, and constant voltage.
Charge is terminated based on minimum current. An
internal charge timer provides a backup safety for charge
termination. The EUP8020X automatically re-starts the
charge if the battery voltage falls below an internal
threshold. The EUP8020X also automatically enters sleep
mode when both supplies are removed. No external sense
resistor or blocking diode is required for charging.
The EUP8020X integrates internal power FET , current
sensor, charge status and reverse current protection in a
single monolithic devices.
z
z
z
z
z
z
z
z
z
Charges Single Cell Li-Ion/Polymer from Either
AC Adapter or USB With Autonomous
Power-Source Selection
Integrated Power FET and Current Sensor for Up
to 1A Charge Applications From AC Adapter
Integrated USB Control With Selectable
100 mA and 500 mA Charge Rates
Precharge Conditioning With Safety Timer
Power Good (AC Adapter Present) Status Output
Optional Battery Temperature Monitoring Before
and During Charge
Automatic Sleep Mode for Low-Power
Consumption
Available in TDFN-10 Package
RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z
z
z
z
Smartphones
Digital Cameras
PDAs/ MP3 Players
Other Battery-Powered Devices
Typical Application Circuit
Figure 1. EUP8020A
DS8020X Ver 1.1 June 2006
1
EUP8020X
Block Diagram
Figure 2.
DS8020X Ver 1.1 June 2006
2
EUP8020X
Pin Configurations
Package Type
Pin
Configurations
Package Type
EUP8020A/E
TDFN-10
EUP8020B
TDFN-10
EUP8020C
TDFN-10
EUP8020D
TDFN-10
EUP8020F
TDFN-10
EUP8020G
TDFN-10
Pin
Configurations
Pin Description
PIN
A,E
B
C
D
F
G
I/O
AC
1
1
1
1
1
1
I
AC charge input voltage
USB
2
2
2
2
2
2
I
USB charge input voltage
STAT1
3
3
3
3
3
7
O
Charge status output 1 (open-drain)
STAT2
4
4
4
4
4
6
O
Charge status output 2 (open-drain)
VSS
5
5
5
5
5
3
-
ISET1
6
6
6
6
6
8
I
ISET2
7
7
7
7
7
4
I
CE
8
9
8
-
-
5
I
Ground input
Charge current set point for AC input and precharge and taper set
point for both AC and USB
Charge current set point for USB port (high=500 mA, Low=100
mA, hi-z=disable USB charge)
Charge enable input (active low)
TS
9
-
-
9
9
9
I
Temperature sense input
OUT
10
10
10
10
10
10
O
Charge current output
PG
-
8
-
-
-
-
O
Powergood status output (active low)
TE
-
-
-
-
8
-
I
Timer enable input (active low)
TTE
-
-
9
8
-
-
I
Timer and termination enable input (active low)
DS8020X Ver 1.1 June 2006
DESCRIPTION
3
EUP8020X
Ordering Information
Order Number
Package Type
EUP8020A-JIR1
TDFN-10
EUP8020B-JIR1
TDFN-10
EUP8020C-JIR1
TDFN-10
EUP8020D-JIR1
TDFN-10
EUP8020E-JIR1
TDFN-10
EUP8020F-JIR1
TDFN-10
EUP8020G-JIR1
TDFN-10
Marking
xxxxx
8020A
xxxxx
8020B
xxxxx
8020C
xxxxx
8020D
xxxxx
8020E
xxxxx
8020F
xxxxx
8020G
EUP8020X- □ □ □ □
Lead Free Code
1: Lead Free 0: Lead
Packing
R: Tape& Reel
Operating temperature range
I: Industry Standard
Package Type
J: TDFN-10
DS8020X Ver 1.1 June 2006
4
Operating Temperature range
-20 °C to 70°C
-20 °C to 70°C
-20 °C to 70°C
-20 °C to 70°C
-20 °C to 70°C
-20 °C to 70°C
-20 °C to 70°C
EUP8020X
Absolute Maximum Ratings
„
Input voltage(AC, CE ,ISET1,ISET2,OUT, PG ,STAT1,STAT2, TE , TS, TTE ,USB) -------- 0.3V to 6V
„
Output sink / source current (STAT1,STAT2, PG ) ---------------------------------------------------- 15mA
„
Output current (TS ) --------------------------------------------------------------------------------------- 200μA
„
Output current (OUT) ------------------------------------------------------------------------------------- 1.5 A
Junction temperature range, TJ ------------------------------------------------------------------------- 150°C
Storage temperature range, Tstg ------------------------------------------------------------- -65°C to 150°C
Lead temperature (soldering, 10s) -------------------------------------------------------------------260°C
„
„
„
Dissipation Ratings
Package
θJA
TDFN-10
48°C/W
Derating Factor
Above TA =25°C
0.0208 W/°C
TA < 40°C
Power Rating
1.5W
Recommended Operating Conditions (1)
Min.
Max.
Unit
Supply voltage (from AC input), VCC
4.5
5.5
V
Supply voltage (from USB input), VCC
4.35
5.5
V
Operating junction temperature range, TJ
-40
125
°C
Electrical Characteristics over Recommended Operating Free-Air Temperature Range
Parameter
Conditions
EUP8020X
Unit
Min.
Typ. Max.
Input Current
VCC current, ICC(VCC)
Sleep current, ICC(SLP)
Standby current, ICC(STBY)
VCC > VCC(min)
Sum of currents into OUT pin,
VCC < V(SLP)
CE = High, 0°C ≤ TJ ≤ 85°C
0.9
1.5
1
5
50
150
mA
µA
Voltage Regulation
Output voltage, VO(REG)
Voltage regulation accuracy
AC dropout voltage (V(AC)-V(OUT)),
V(DO)
TA = 25°C
VO(OUT) = VO(REG), IO(OUT) = 1A
USB dropout voltage (V(USB) - V(OUT)), VO(OUT) = VO(REG) ISET2 = High
V(DO)
VO(OUT) = VO(REG) ISET2 = Low
DS8020X Ver 1.1 June 2006
V
4.2
5
-0.5%
0.5%
-1.5%
1.5%
400
500
400
500
100
150
mV
EUP8020X
Electrical Characteristics Over Recommended Operating Free-Air Temperature Range
Parameter
Conditions
EUP8020X
Unit
Min.
Typ. Max.
Current Regulation
VI(OUT) >V(LOWV), VCC ≥ 4.5 V
VI(OUT) >V(LOWV), VCC ≥ 4.5 V
ISET2 = Low
VI(OUT) >V(LOWV), VCC ≥ 4.5 V
ISET2 = High
Voltage on ISET1 pin, VCC ≥ 4.5 V,
VI(OUT) > V(LOWV),
50 mA ≤ IO(OUT) ≤ 1 A
AC output current range, IO(OUT) (1)
USB output current range, IO(OUT)
Output current set voltage, V(SET)
Output current set factor, K(SET)
50
1000
80
100
400
500
mA
2.410
2.460
2.510
304
320
336
10 mA ≤ IO(OUT) < 50 mA
294
320
346
1 mA ≤ IO(OUT) < 10 mA
246
320
416
2.8
3.0
3.2
V
250
375
500
ms
100
mA
260
mV
Precharge and Short-Circuit Current Regulation
Precharge to fast-charge transition
Voltage on OUT pin
threshold, V(LOWV)
Deglitch time for fast-charge to
precharge transition
Precharge range, IO(PRECHG) (2)
0 V < VI(OUT) < V(LOWV)
Voltage on ISET1 pin,
Precharge set voltage, V(PRECHG)
0 V < VI(OUT) > V(LOWV)
Charge Taper and Termination Detection
Charge taper detection range,
VI(OUT) > V(RCH)
I(TAPER) (3)
USB-100 charge taper detection level
VI(OUT) > V(RCH), ISET2 = Low
8020F
USB-500 charge taper detection level
VI(OUT) > V(RCH), ISET2 = High
8020F
Voltage on ISET1 pin, VO(REG) = 4.2V,
Charge taper detection set voltage,
V(TAPER)
VI(OUT) > V(RCH)
Voltage on ISET pin, VO(REG) = 4.2V,
Charge termination detection set
voltage, V(TERM) (4)
VI(OUT) > V(RCH)
Deglitch time for TAPER detection,
tTPRDET
Deglitch time for termination detection,
tTRMDET
Temperature Sense Comparator
5
230
245
5
V
100
mA
6.5
9
11
32
44
55
235
250
265
11
18
25
250
375
500
250
375
500
Low-voltage threshold, V(LTF)
2.49
2.515
2.54
High-voltage threshold, V(HTF)
0.495
0.510
0.525
102
112
122
µA
250
375
500
ms
Current source, I(TS)
Deglitch time for temperature fault,
t(DEGL)
 K (SET) × V(SET)
(1) I O(OUT) = 

R SET

DS8020X Ver 1.1 June 2006
mV
ms
 K (SET) × V(PRECHG)
(2) I O(PRECHG) = 

R SET





6




V
EUP8020X
Parameter
Conditions
EUP8020X
Unit
Min.
Typ. Max.
Battery Recharge Threshold
VO(REG) VO(REG) VO(REG)
-0.10 -0.050
-0.150
Recharge threshold, VRCH
Deglitch time for recharge detect,
250
375
500
t(DEGL)
STAT1, STAT2, and PG Outputs
Low-level output saturation voltage,
IO = 5 mA
0.25
VOL
ISET2, Charge Enable ( CE ), Timer and Termination Enable ( TTE ), and Timer Enable ( TE ) Inputs
Low-level input voltage, VIL
IIL = 10 µA
0
High-level input voltage, VIH
CE , TE or TTE low-level input
current, IIL
CE , TE or TTE high-level input
current, IIH
ISET2 low-level input current, IIL
IIL = 20 µA
1.4
ISET2 high-level input current, IIH
IISET2 = VCC
0.4
V
ms
V
V
-1
1
IISET2 = 0
µA
-20
40
ISET2 high-Z input current, IIH
1
V
Timers
Precharge time, t(PRECHG)
1,650
1,940
2,230
2,230
Taper time, t(TAPER)
8020A,8020B,8020C,8020D, 8020E,8020G
1,650
1,940
Charge time, t(CHG)
8020A,8020B,8020C,8020D,8020G
16,500
19,400 22,300
8020E,8020F
23,080
27,160 31,235
Timer fault recovery current, I(FAULT)
Sleep Comparator
Sleep-mode entry threshold voltage,
V(SLP)
Sleep mode exit threshold voltage,
V(SLPEXIT)
Sleep mode deglitch time
200
2.3 V ≤ VI(OUT) ≤ VO(REG)
2.3 V ≤ VI(OUT) ≤ VO(REG)
s
s
µA
VCC ≤ VI(OUT)
+100 mV
VCC ≥ VI(OUT)
+190mV
250
375
500
V
ms
Thermal Shutdown Thresholds
Thermal trip threshold, T(SHTDWN)
165
Thermal hysteresis
30
°C
Undervoltage Lockout
Undervoltage lockout V(UVLO)
Decreasing VCC
2.2
Hysteresis
(3)
 K (SET) × V(TAPER ) 

I O(TAPER ) = 


R SET


DS8020X Ver 1.1 June 2006
2.4
20
(4)
7
 K (SET) × V(TERM) 

I O(TERM) = 


R SET


2.6
V
mV
EUP8020X
Application Information
Figure 3. Operational Flow Chart
DS8020X Ver 1.1 June 2006
8
EUP8020X
Functional Description
Autonomous Power Source Selection
As default the EUP8020X attempts to charge from the
AC input. If AC input is not present, the USB is selected.
If both inputs are available, the AC adapter has the
priority. See Figure 4 for details.
The EUP8020X activates a safety timer, t(PRECHG), during
the conditioning phase. If V(LOWV) threshold is not
reached within the timer period, the EUP8020X turns off
the charger and enunciates FAULT on the STATx pins.
Please refer to the Timer Fault Recovery section for
additional details.
Figure 4.Typcial Charging Profile
Temperature Qualification
( 8020A,8020D,8020E,8020F,8020G Only)
The EUP8020X continuously monitors battery
temperature by measuring the voltage between the TS
and VSS pins.
An internal current source provides the bias for most
common 10-kΩ negative-temperature coefficient
thermistors (NTC) (see Figure 5). The device compares
the voltage on the TS pin against the internal V(LTF) and
V(HTF) thresholds to determine if charging is allowed.
Once a temperature outside the V(LTF) and V(HTF)
thresholds is detected the device immediately suspend the
charge. The device suspend charge by turning off the
power FET and holding the timer value (i.e. timers are
NOT reset). Charge is resumed when the temperature
returns to the normal range.
However the user may modify these thresholds by adding
two external resistors. See Figure 6.
Figure 5. Temperature Sensing Configuration
Figure 6. Temperature Sensing Thresholds
Battery Pre-Conditioning
Battery Charge Current
During a charge cycle if the battery voltage is below the
V(LOWV) threshold, the EUP8020X applies a precharge
current, IO(PRECHG), to the battery. This feature revives
deeply discharged cells. The resistor connected between
the ISET1 and VSS, RSET, determines the precharge rate.
The V(PRECHG) and K(SET) parameters are specified in the
specifications table. Note that this applies to both AC and
USB charging.
The EUP8020X offers on-chip current regulation with
programmable set point. The resistor connected between
the ISET1 and VSS, RSET, determines the AC charge rate.
The V(SET) and K(SET) parameters are specified in the
specifications table.
I O(PRECHG) =
V(PRECGH ) × K (SET )
R SET
DS8020X Ver 1.1 June 2006
------------ (1)
9
I O(OUT) =
V(SET ) × K (SET )
R SET
---------------------- (2)
When charging from a USB port, the host controller has
the option of selecting either 100 mA or 500 mA charge
rate using ISET2 pin. A low-level signal sets current at
100 mA and a high level signal sets current at 500 mA. A
high-Z input disables USB charging.
EUP8020X
Battery Voltage Regulation
The voltage regulation feedback is through the OUT pin.
This input is tied directly to the positive side of the
battery pack. The EUP8020X monitors the battery pack
voltage between the OUT and VSS pins. When the
battery voltage rises to VO(REG) threshold, the voltage
regulation phase begins and the charging current begins
to taper down.
As a safety backup, the EUP8020X also monitors the
charge time in the charge mode. If charge is not
terminated within this time period, t(CHG), the EUP8020X
turns off the charger and enunciates FAULT on the
STATx pins. Please refer to the Timer Fault Recovery
section for additional details.
Charge Taper Detection, Termination and Recharge
The EUP8020X monitors the charging current during the
voltage regulation phase. Once the taper threshold,
I(TAPER),is detected the EUP8020X initiates the taper timer,
t(TAPER). Charge is terminated after the timer expires. The
resistor connected between the ISET1 and VSS, RSET,
determines the taper detection level. The V(TAPER) and
K(SET) parameters are specified in the specifications table.
Note that this applies to both AC and USB charging.
V(TAPER ) × K (SET )
I (TAPER) =
R SET
V(TERM ) × K (SET )
R SET
The EUP8020X enters the low-power sleep mode if both
AC and USB are removed from the circuit. This feature
prevents draining the battery during the absence of input
supply.
Charge Status Outputs
The open-drain STAT1 and STAT2 outputs indicate
various charger operations as shown in the following
table. These status pins can be used to drive LEDs or
communicate to the host processor. Note that OFF
indicates the open-drain transistor is turned off.
------------------ (3)
-------------------- (4)
After charge termination, the EUP8020X re-starts the
charge once the voltage on the OUT pin falls below the
V(RCH) threshold. This feature keeps the battery at full
capacity at all times.
DS8020X Ver 1.1 June 2006
Sleep Mode
Table 1. Status Pins Summary
The EUP8020X resets the taper timer in the event that
the charge current returns above the taper threshold,
I(TAPER).
In addition to the taper current detection, the EUP8020X
terminates charge in the event that the charge current falls
below the I(TERM) threshold. This feature allows for quick
recognition of a battery removal condition or insertion of
a fully charged battery. Note that charge timer and taper
timer are bypassed for this feature. The resistor
connected between the ISET1 and VSS, RSET, determines
the taper detection level. The V(TERM) and K(SET)
parameters are specified in the specifications table. Note
that this applies to both AC and USB charging.
I (TERM) =
Note On EUP8020F
The EUP8020F monitors the charging current during the
voltage regulation phase. Once the taper threshold,
I(TAPER),is detected the EUP8020F terminates the charge.
There is no taper timer, t(TAPER) for this version.
The resistor connected between the ISET1 and VSS, RSET,
determines the taper detection level for AC input. For
USB charge, taper level is fixed at 10% of the 100- or
500-mA charge rate.
Also note that there is I(TERM) detection in EUP8020F.
10
CHARGE STATE
Precharge in progress
Fast charge in progress
Charge done
Charge suspend (temperature)
Timer fault
Sleep mode
STAT1 STAT2
ON
ON
ON
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF means the open-drain output transistor on the
STAT1 and STAT2 pins is in an off state.
PG Output
The open-drain PG (Power Good) indicates when the
AC adapter is present. The output turns ON when a valid
voltage is detected. This output is turned off in the sleep
mode. The PG pin can be used to drive an LED or
communicate to the host processor.
EUP8020X
CE Input (Charge Enable)
The CE digital input is used to disable or enable the
charge process. A low-level signal on this pin enables the
charge and a high-level signal disables the charge and
places the device in a low-power mode. A high-to-low
transition on this pin also resets all timers and timer fault
conditions. Note that this applies to both AC and USB
charging.
TTE Input (Timer and Termination Enable)
The TTE digital input is used to disable or enable the
fast-charge timer and charge taper detection. A low-level
signal on this pin enables the fast-charge timer and taper
timer and a high-level signal disables this feature. Note
that this applies to both AC and USB charging.
Thermal shutdown and Protection
The EUP8020X monitors the junction temperature, TJ, of
the die and suspends charging if TJ exceeds T(SHTDWN).
Charging resumes when TJ falls below T(SHTDWN) by
approximately 30 ℃.
TE Input (Timer Enabled)
The TE digital input is used to disable or enable the
fast-charge timer. A low-level signal on this pin enables
the fast-charge timer and a high-level signal disables this
feature.
Note that this applies to both AC and USB charging.
Timer Fault Recovery
As shown in Figure 3, EUP8020X provides a recovery
method to deal with timer fault conditions. The following
summarizes this method:
Condition #1: Charge voltage above recharge threshold
(V(RCH)) and timeout fault occurs
Recovery method: EUP8020X waits for the battery
voltage to fall below the recharge threshold. This could
happen as a result of a load on the battery, self-discharge
or battery removal. Once the battery falls below the
recharge threshold, the EUP8020X clears the fault and
starts a new charge cycle. A POR or CE or TTE toggle
also clears the fault.
DS8020X Ver 1.1 June 2006
11
Condition #2: Charge voltage below recharge threshold
(V(RCH)) and timeout fault occurs
Recovery method: Under this scenario, the EUP8020X
applies the I(FAULT) current. This small current is used to
detect a battery removal condition and remains on as long
as the battery voltage stays below the recharge threshold.
If the battery voltage goes above the recharge threshold,
then the EUP8020X disables the I(FAULT) current and
executes the recovery method described for condition #1.
Once the battery falls below the recharge threshold, the
EUP8020X clears the fault and starts a new charge cycle.
A POR or CE or TTE toggle also clears the fault.
EUP8020X
Packaging Information
TDFN-10
SYMBOLS
MILLIMETERS
MIN.
MAX.
MIN.
MAX.
A
0.70
0.80
0.028
0.031
A1
0.00
0.05
0.000
0.002
D
2.90
3.10
0.114
0.122
E1
DS8020X Ver 1.1 June 2006
INCHES
1.70
0.067
E
2.90
3.10
0.114
0.122
L
0.30
0.50
0.012
0.020
b
0.18
0.30
0.007
0.012
e
0.50
0.020
D1
2.40
0.094
12
Similar pages