ACT2802_16 [ACTIVE-SEMI]
5V/2.5A Backup Battery Pack Manager;
| 型号： | ACT2802_16 |
| 厂家： | 
ACTIVE-SEMI, INC |
| 描述： | 5V/2.5A Backup Battery Pack Manager 电池 |
| 文件： | 总25页 (文件大小：885K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
5V/2.5A Backup Battery Pack Manager
APPLICATIONS
FEATURES
Dedicated Single Chip Solution for Mobile Power
Backup Battery Pack
Power Bank
Mobile Power
With Minimal Component Count
5V/2.5A Constant Output Current Limit in Boost
Mode
Standalone Battery Charger with USB Output
2.5A Switching Charger Current Limit
Programmable 4.1V to 4.35V Battery Voltage
95% Boost Efficiency (Vbat=4.1V)
Adaptive to 10mA-2400mA Input Sources
Battery Disconnection at Output Short
GENERAL DESCRIPTION
ACT2802/ACT2802B/ACT2802C is a space-saving
and high-performance low-profile single-chip
solution for backup battery pack and standalone
battery charger. ACT2802/ACT2802B/ACT2802C
integrates all the functions that a backup battery
pack needs, including switching charger, boost
converter and LED indication.
<10µA Low Battery Leakage Current at HZ
Mode During Storage
Boost Auto Turn-off at No Load and Push
Button Turn-on
ACT2802/ACT2802B/ACT2802C operates at
1.1MHz for switching charger and 0.55MHz for
boost converter allowing tiny external inductor and
capacitors. ACT2802/ACT2802B/ACT2802C
provides a direct power path from input to output
with programmable current limit while providing
power to switching charger. Output has higher
priority than battery charger if the programmed
input current limit is reached.
Battery Over Current, Over Voltage, Over
Temperature and Short Circuit Protections
Boost Auto Startup with Load Detection
Up to 3.0A Input Current Limit with Prioritized
Power Path to Output
5V+/-100mV Output Voltage in Boost Mode
1.1MHz/0.55MHz Switching Frequencies
2.2uH Inductor and Low Profile Ceramic
ACT2802/ACT2802B/ACT2802C charges battery
with full cycle of preconditioning, fast charge with
constant current and constant voltage until end of
charge. The battery charger is thermally regulated
at 110°C with charge current foldback.
Capacitor
4 LEDs Battery Level and Status Indication
Battery Impedance Compensation
Full Cycle of Battery Charge Management
Preconditioning, Fast Charge, Top off and End
of Charge
ACT2802/ACT2802B/ACT2802C boost converter
steps battery voltage up to 5V. Boost converter
features high efficiency, constant current regulation,
short circuit protection and over voltage protection.
Charge Current Foldback at 110°C Die
Temperature
ACT2802/ACT2802B/ACT2802C provides 3.5mA
constant currents to drive 4 LEDs to indicate
battery level and charge status. Battery impedance
is compensated for battery level indication.
IC Over Temperature Protection at 160°C
QFN4x4-24 Package
Boost CC/CV Profile
5.5
VBAT =3.2V
5.0
VBAT =3.7V
4.5
4.0
VBAT =4.1V
3.5
3.0
0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
2.4
2.7
Output Current (A)
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
ORDERING INFORMATION
LEDS AL-
LATCH OFF
BOOST
PB TURN
OFF BOOST
PART NUMBER
OUTPUT FLASHLIGHT
WAYS ON IN AT BOOST LIGHT LOAD PACKAGE
BOOST
No
UVLO
Yes
OFF TIME
16s
ACT2802QL-T1028
5V/2.5A
No
Yes
Yes
Yes
No
QFN44-24
QFN44-24
QFN44-24
ACT2802BQL-T1028 5V/2.5A
ACT2802CQL-T1028 5V/2.5A
Yes
No
Yes
Yes
16s
16s
No
PIN CONFIGURATION
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
PIN DESCRIPTIONS
PIN
NAME
DESCRIPTION
Boost/high-Z mode enable pin, internally pulled up by a 3MΩ resistor to battery. When
HZ pin is pulled ground, boost is enabled if VIN is not present.
1
HZ
Push button input, connect a push button from this pin to AGND, internally pulled up
by a 3MΩ resistor to battery. PB starts up boost converter if HZ pin is grounded and
VIN is not present. For ACT2802B/ACT2802C, if this pin is pushed for 3s, flashlight is
enabled.
2
PB
3
4
AGND
nPG
Logic Ground. AGND must be connected to PGND externally through ground plane.
Drive external P-FET to protect output short circuit and leakage during shutdown. nPG
pin is pulled up to VOUT internally. nPG pin is pulled low if VOUT is in the range.
Input current limit setting pin. Connect a resistor from this pin to AGND to set the input
current limit. The current setting ranges from 1.0A-3.0A.
5
6
ILIM
VIN
USB or AC adaptor input. When VIN is valid, charge and power path is enabled.
Output pin. Bypass to PGND with a high quality low ESR and ESL ceramic capacitor
placed as close to the IC as possible.
7, 8
9, 10
VOUT
SW
Internal switch to output inductor terminal.
Power ground. PGND is connected to the source of low-side N-channel MOSFET and
the MOSFET’s gate driver. PGND must be connected to AGND externally through
ground plane.
11
12
PGND
BAT
Battery input. Connected to the battery pack positive terminal to provide power in High-
Z mode. Bypass to PGND with a high quality ceramic capacitor placed as close to the
IC as possible.
Positive terminal of charge current sense input. Kevin sense is required with 10nF
ceramic capacitor right across CSP and CSN pins.
13
14
15
CSP
CSN
IOST
Negative terminal of charge current sense input.
Output current setting. Connect a resistor from this pin to AGND to set output constant
current. The current setting ranges from 1.0A-2.5A.
Fast charge current setting pin. Connect a resistor from this pin to AGND to set the
charge current. The current setting ranges from 1.0A-2.5A.
16
17
ICST
BTV
Battery termination voltage setting. Connect a resistor from this pin to AGND to
program battery charge termination voltage.
18
19
20
21
LED1
LED2
LED3
LED4
Battery level indicator. An internal 3.5mA sink current limit is built in.
Battery level indicator. An internal 3.5mA sink current limit is built in.
Battery level indicator. An internal 3.5mA sink current limit is built in.
Battery level indicator. An internal 3.5mA sink current limit is built in.
Battery impendence compensation input. Connect to a resistor from this pin to APNG
to program the battery impedance.
22
23
RIMC
BLVS
Battery level voltage shift. Connect a resistor from this pin to AGND to shift the battery
LED indication thresholds.
TH: ACT2802QL-T1028
Temperature sensing input. Connect to battery thermistor terminal. If no use, put 10K
pulled down resistor.
24
TH/FLD
EP
FLD: ACT2802BQL-T1028/ACT2802CQL-T1028
Open-drain flashlight driver. A internal switch can handle up to 50mA.
25
Exposed pad. Must be soldered to ground on the PCB.
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
ABSOLUTE MAXIMUM RATINGS
PARAMETER
VALUE
-0.3 to 6.5
40
UNIT
V
All the Pin to PGND and AGND
Junction to Ambient Thermal Resistance
Maximum Power Dissipation
°C/W
W
2.5
Operating Ambient Temperature
Operating Junction Temperature
Storage Junction Temperature
-40 to 85
-40 to 150
-40 to 150
300
°C
°C
°C
Lead Temperature (Soldering 10 sec.)
°C
: Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may
affect device reliability.
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
ELECTRICAL CHARACTERISTICS
(VIN = 5V, TA = 25°C, unless otherwise specified.)
PARAMETER
Input Current Limit
Input Voltage Range
TEST CONDITIONS
MIN
TYP
MAX UNIT
4.5
5.5
5.5
6.5
V
VIN Over Voltage Protection
Input Voltage Validation Time
Input Current Limit Setting Range
Input Current Limit
VIN rising, VIN_OVP
VIN_UVLO<VIN<VIN_OVP
6.0
32
V
ms
A
R
ILIM=0.806kΩ—2.4kΩ
ILIM=0.806kΩ
1.0
3.0
R
3.0
A
Input Current Limit Gain
2000
Leakage Current from VOUT to VIN in Boost
Mode
0
10
15
µA
µA
3.0V<VBAT<4.35V, Ta=25℃
3.0V<VBAT<4.35V, Ta=25℃
Battery Discharge Current in High-Z Mode
Power Switches
7.5
VIN-to-VOUT FET on Resistance
VOUT-to-SW FET on Resistance
SW-to-PGND FET on Resistance
Buck Converter
80
60
65
mΩ
mΩ
mΩ
Switching Frequency
-15%
4.5
1.1
6
+15% MHz
High Side Switch Peak Current Limit
Minimum On-time
A
100
160
35
ns
℃
℃
Over Temperature Protection (OTP)
OTP Hysteresis
OTP rising
OTP falling
Charge Mode
Charge Current Setting Range
Rcs=25mΩ, RICST=20kΩ—50kΩ
Rcs=25mΩ, RICST=43.2kΩ
1.0
2.5
A
A
Charge Current Setting (ICHRG
Thermal Regulation Temperature
Battery Adjust Voltage(VBAJ
)
2.1
110
0.1
℃
Rbtv=25kΩ
V
)
End of Charge (EOC) Voltage
-0.5% 4.1+VBAJ 0.5%
V
EOC Voltage Accuracy
Rbtv=0
4.1
4.6
200
V
V
Battery Over Voltage Threshold
Battery Over Voltage Threshold Hysteresis
VBAT rising
VBAT falling
mV
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
ELECTRICAL CHARACTERISTICS
(VIN = 5V, TA = 25°C, unless otherwise specified.)
PARAMETER
TEST CONDITIONS
MIN
TYP MAX UNIT
Fast Charge Current
VBAT=3.5V
ICHRG
10
A
%
Precondition Charge Current
Precondition Voltage Threshold
Precondition Voltage Threshold Hysteresis
Low VBAT Charge Current
2.4V≤VBAT≤2.8V, Percent of ICHRG
VBAT rising, Rbtv=0
2.8
V
130
200
mV
mA
VBAT=1V, RICST=43.2kΩ
VBAT=4.2V, percent of the fast
charge current
EOC Current Threshold
15
200
1.5
%
mV
V
Charge Restart Voltage Threshold
TH Upper Temperature Voltage Threshold
Cold detect NTC thermistor,
ACT2802QL-T1028
Hot detect NTC thermistor,
ACT2802QL-T1028
TH Lower Temperature Voltage Threshold
TH Hysteresis
0.3
50
V
ACT2802QL-T1028
mV
TH Internal Pull-up Current
LED Flash Frequency
ACT2802QL-T1028
60
µA
Hz
LED flash 1s on and 1s off
0.5
Charge Current Foldback
Charge Current Reduction Threshold1 of Vout1 Starting foldback point
4.59
4.7
4.81
4.5
V
V
Stop foldback point, RCS=25mΩ,
Charge Current Reduction Threshold2 of Vout1
4.57
RICST=43.2kΩ
Boost Mode
Input Voltage Operation Range
Switching Frequency
3.0
V
-15%
0.55
3.3
+15% MHz
Input Voltage UVLO
VBAT rising
V
Input Voltage UVLO Hysteresis
Output Voltage (VOUT)
Output Voltage Accuracy
VBAT falling
400
mV
4.97
-3
5.05
VOUT
5.10
2
V
%
V
Ta=25℃
All conditions
80mA-1A-80mA, 0.1A/us
1A-2.0A-1A, 0.1A/us
VOUT rising
4.75
4.7
5.25
5.25
Output Voltage Transient Response
V
Output Over Voltage Protection
5.7
V
Output Over Voltage Protection Hysteresis
VOUT falling
300
mV
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
ELECTRICAL CHARACTERISTICS
(VIN = 5V, TA = 25°C, unless otherwise specified.)
PARAMETER
TEST CONDITIONS
MIN
TYP MAX UNIT
Output Current Regulation Range
Output Current Limit
1.0
2.5
A
A
Rcs=25mΩ, RIOST=37.4kΩ—93.7kΩ
Rcs=25mΩ, RIOST=91kΩ
All conditions
2.4
200
100
6.8
400
4.25
4.6
3
The Maximum Voltage Across VRcs
Minimum On-Time
mV
ns
A
Low Side Switch Peak Current Limit
Soft-Startup Time
VBAT=3.6V, VOUT=5V
5.6
µs
V
VOUT falling
VOUT rising
Under Voltage Protection
(UVP Threshold)
V
UVP Blanking Time During Startup
UVP Sense Detection Time
Restart After UVP
ms
µs
s
VOUT falling
20
Hiccup mode
2
Light Load Current Shut off Threshold
Light Load Current Detect Time
HZ Pin High Voltage
VBAT=3.7V, Rcs=25mΩ,RIOST=91kΩ
40
100
1.4
mA
s
16
HZ voltage rising
HZ voltage falling
0.9
0.75
3
V
HZ Pin Low Voltage
0.4
V
HZ Internal Pull-up Resistor
PB Turn off Boost Time
MΩ
s
ACT2802QL-T1028
All condition
1.5
30
PB Turn on Boost Time
ms
PB is pushed and released,
ACT2802QL-T1028/ACT2802CQL-T1028
LED Indication Time
5
s
s
Mode Transition
Transition Waiting Time between Charge
Mode and Boost Mode
TRANTIME
2
Battery Level Indication
Battery Impedance Compensation Range
Battery Impedance Compensation
PB High Input Voltage
40
500
1.4
mΩ
mΩ
V
200
0.9
Rcs=25mΩ, RIMC=200kΩ
PB voltage rising
PB Low Input Voltage
PB voltage falling
0.4
0.75
V
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ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
ELECTRICAL CHARACTERISTICS
(VIN = 5V, TA = 25°C, unless otherwise specified.)
PARAMETER
PB Internal Pull-up Resistor
Flashlight Driver
TEST CONDITIONS
MIN
TYP MAX UNIT
3
MΩ
Flashlight rising,
ACT2802BQL-T1028/ACT2802CQL-T1028
Flashlight Voltage UVLO
3.3
2.9
50
V
V
Flashlight falling,
ACT2802BQL-T1028/ACT2802CQL-T1028
Flashlight Voltage UVLO Threshold
Flashlight Driver Current
The current at FLD pin,
ACT2802BQL-T1028/ACT2802CQL-T1028
mA
PB Turn on Flashlight Time
PB Turn off Flashlight Time
ACT2802BQL-T1028/ACT2802CQL-T1028
ACT2802BQL-T1028/ACT2802CQL-T1028
3.0
3.0
s
s
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
FUNCTIONAL BLOCK DIAGRAM FOR ACT2802QL-T1028
FUNCTIONAL BLOCK DIAGRAM FOR ACT2802BQL-T1028/
ACT2802CQL-T1028
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
FUNCTIONAL DESCRIPTION
ACT2802/ACT2802B/ACT2802C is
a
complete
operation flow chart as shown in Figure 1, and
ACT2802B/ACT2802C system operation flow chart
as shown in Figure 2.
battery charging and discharging power
management solution for applications of single-cell
lithium-based backup battery pack or power bank.
There is a power path from input to output with
programmable input current limit. When output is
over loaded, the input switch Q1 starts going into
linear mode and thus output voltage starts to drop.
If output voltage drops below 4.25V, the input
switch Q1 turns off and restart in 2 seconds.
Any transitions between boost mode and charge
mode go through HZ mode by turning off all the
switches Q1-Q3 into HZ mode for 2 seconds before
enabling the other mode.
The modes are determined by HZ pin and VIN pin
as shown in the table 1. A valid VIN voltage forces
ACT2802/ACT2802B/ACT2802C into charge mode.
Boost mode is enabled if HZ pin is pulled low and
VIN is invalid or not present. For ACT2802/
ACT2802B/ACT2802C, when HZ=0, if PB is pulled
low more than 30ms, boost converter is enabled.
For ACT2802, during boost on, if PB is pressed
more than 1.5s, boost converter will be off.
With the advanced ACT2802/ACT2802B/
ACT2802C architecture, a synchronous buck/boost
converter is connected from VOUT to switching
node (SW). With the bidirectional architecture, the
converter could be configured as either buck to
charge battery or boost to discharge battery. With
switching charger and discharger, the higher charge
Table 1: Mode Selection
current and higher conversion
achieved.
efficiency are
HZ PIN
VIN Valid
Mode
0
0
0
1
1
0
1
1
Modes of Operation
Boost
Charge
HZ
Charge
ACT2802/ACT2802B/ACT2802C has 3 operation
modes: charge mode, boost mode and high-
impedance (HZ) mode. In charge mode, the input
current limit Q1 is enabled and Q2 and Q3 operate
as a buck converter to charge battery. In boost
mode, Q2 and Q3 operate as boost converter to
step battery voltage up to +5V at VOUT, and the
current limit switch Q1 is turned off, and the reverse
current from VOUT to VIN is blocked. In HZ mode,
all the switches are turned off and the drainage
current from battery is very low. ACT2802 system
Flashlight
ACT2802B/ACT2802C has an flashlight function.
Once PB is pressed for more than 3 seconds, the
flashlight is switched on. The driver will deliver up to
50mA current to the flashlight. During flashlight on,
if PB is pressed for 3 seconds, flashlight will be
switched off.
Figure 1:
ACT2802 System Operation Flow Chart
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
FUNCTIONAL DESCRIPTION
Figure 2:
ACT2802B/ACT2802C System Operation Flow Chart
chrng at the termination voltage.
Latch-Off
Precondition Charge
ACT2802/ACT2802B/ACT2802C has latch off
function. If discharging stops due to battery cut-off,
and latch off will be triggered, it would prevent
battery from discharging again, latch-off is released
when input power is recycled.
A new charging cycle begins with the precondition
state, and operation continues in this state until VBAT
exceeds the precondition threshold voltage. When
operating in precondition state, the cell is charged
at a reduced current, 10% of the programmed
maximum fast charge constant current. Once VBAT
reaches the precondition threshold voltage the state
machine jumps to the fast charge state.
Input Current Limit
When the input current reaches the programmed
value, switch Q1 goes into linear mode and output
voltage starts to drop. When output voltage drops to
4.25V, hiccup mode is triggered and switch Q1
turns off and restart in 2 seconds.
Fast Charge
If battery voltage is above preconditioning
threshold, buck converter charges battery with
constant current. In fast charge state, the ACT2802/
ACT2802B/ACT2802C charges at the current set
by the external resistor connected at the ICST pin.
During a normal charge cycle fast charge continues
in CC mode until VBAT reaches the charge
termination voltage, at which point the ACT2802/
ACT2802B/ACT2802C charges in top off state.
Switching Battery Charger
ACT2802/ACT2802B/ACT2802C is configured in
charge mode (buck mode) when VIN is valid. In this
mode, a battery is charged with preconditioning,
fast charge, top-off and end of charge (EOC). The
typical charge management is shown in Figure 3
and Figure 4.
Top Off
CC/CV Regulation Loop
With the battery voltage approaches the EOC
voltage set by the BTV pin. Charge current
decreases as charging continues. In the top off
state, the cell is charged in constant voltage (CV)
mode. During a normal charging cycle charging
proceeds until the charge current decreases below
the end of charge (EOC) threshold, defined as 15%
of fast charge current. When this happens, the state
machine terminates the charge cycle and jumps to
the EOC state.
There are CC/CV regulation loops built in ACT2802/
ACT2802B/ACT2802C, which regulates either
current or voltage as necessary to ensure fast and
safe charging of the battery. In a normal charge
cycle, this loop regulates the current to the value
set by the external resistor at the ICST pin.
Charging continues at this current until the battery
cell voltage reaches the termination voltage. At this
point the CV loop takes over, and charge current is
allowed to decrease as necessary to maintain
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ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
FUNCTIONAL DESCRIPTION
Recharge
End of Charge
When battery voltage drops by 200mV below the
end of charge voltage, the charger is reinitiated
with constant current charge.
When charge current decreases to 15% of set fast
charge current, the buck converter goes into end of
charge mode and keep monitoring the battery
voltage.
Figure 3.
Typical Li+ Charge Profile and ACT2802/ACT2802B/ACT2802C Charge States
A: PRECONDITION STATE
B: FAST-CHARGE STATE
C: TOP-OFF STATE
D: END-OF-CHARGE STATE
Figure 4.
Charger State Diagram
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ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
programmed by a resistor connected from BLVS
pin to AGND as shown in Figure 6. The following
equation shows the LED4 voltage threshold:
APPLICATIONS INFORMATION
Battery Charge Termination Voltage
VBATLED 4 (V ) 3.5(V ) 0.01( mA ) RBLVS ( k )
(2)
Battery charge termination voltage is set by a
resistor Rbtv connected from BTV pin to AGND as
shown in Figure 5. The battery charge termination
voltage is estimated as the following equation:
VBAT (V ) 4.1(V ) Rbtv 4 106(V )
(1)
Rbtv is selected based on the battery voltage rating.
1% accuracy resistor is recommended for Rbtv.
Figure 6. Battery level voltage shift setting circuit
As long as LED4 is set, the other 3 LED thresholds
is fixed as shown in the table 3:
Table 3: 4 LED Voltage Thresholds
RBLVS (ohm)
LED1
50K
60K
70K
80K
3.55V
3.65V
3.80V
4.00V
3.65V
3.75V
3.90V
4.10V
3.75V
3.85V
4.00V
4.20V
3.85V
3.95V
4.10V
4.30V
LED2
Figure 5. Battery terminal voltage setting circuit
LED3
LED Status Indication
LED4
4 LEDs ON/OFF and flash show the charge status
and the remained capacity level as shown in the
table 2. The LED status is based on battery voltage
and operation modes. In charge mode, when a
battery is fully charged, flashing stops and all the 4
LEDs are solid on.
Input Current Limit
An external resistor is used to set the input current
limit connected from ILIM pin to AGND as shown in
Figure 7. Input current limit has built-in soft startup
and current foldback control loop. The input current
limit is estimated as the following equation:
Battery level voltage shift (BLVS pin)
LED1-4 voltage thresholds are adjusted from HZ
mode during charging and discharging based on
the compensated impedance. Those thresholds are
2.4 (V)
IILIM (A)
(3)
RILIM (k )
Table2: LED Indication
(Boost or HZ Mode)
Charge Mode
ACT2802QL-T1028/
ACT2802CQL-T1028:PB time > 30ms
LED
LED1
LED2
LED3
LED4
LED1
LED2
LED3
LED4
VBAT<2.9V
2.9V≤VBAT<LED1
LED1≤VBAT<LED2
LED2≤VBAT<LED3
LED3≤VBAT<LED4
VBAT≥LED4
Flash
Flash
On
Off
Off
Off
Off
Off
Off
Off
Flash
On
Off
Off
Off
On
On
On
On
Off
Off
Off
Off
On
On
On
Off
Off
Off
Off
Off
On
On
Flash
On
Off
Off
On
Flash
On
Off
On
On
On
Flash
Flash
On
On
On
On
On
On
VBAT≥LED4 (End of Charge)
On
On
On
On
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
3.0
VIN = 5.0V
Vbat=3.7V
2.5
2.0
1.5
1.0
0.5
0
0
10
20
30
40
50
60
Figure 7. Input current limit setting circuit
RICST (kΩ)
Figure 11. Battery fast charge current setting
Input current limit at various resistor curve is shown
in Figure 8.
Boost Output Constant Current
3.5
Boost output current is set by a resistor connected
from IOST pin to AGND as shown in Figure 12. The
boost output current is estimated as the following
equation:
VIN = 5.0V
3.0
2.5
2.0
1.5
2
RIOST (k )
Rcs (m )
IIOST (A) ( A)
(5)
3
1.0
0.5
0.6
1.0
1.4
1.8
2.2
2.6
3.0
RILIM (kΩ)
Figure 8. Input current limit setting
The ILIM pin voltage is proportional to input current
until input current is limited, as shown in Figure 9.
1.4
VIN = 5.0V
RILIM=750Ω
Figure 12. Boost output current setting circuit
1.2
1.0
0.8
0.6
0.4
0.2
0
Figure 13 gives out boost output current with
various RIOST
.
3.0
2.5
2.0
VBAT = 3.7V
CVout=4.5V
0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
1.5
1.0
0.5
Input current (A)
Figure 9. VILIM VS. input current
0
0
Battery Fast Charge Current
20
40
RIOST (kΩ)
Figure 13. Boost output current setting
60
80
100
Battery fast charge current is set by a resistor
connected from ICST pin to AGND as shown in
Figure 10. Figure 11 gives out different fast charge
current with various RICST. The battery fast charge
current is estimated as the following equation:
The IOST pin voltage is proportional to output
current until output current is limited, as shown in
Figure 14.
750
RICST (k )
Rcs(m )
Ic(A) 1.25(A)
VBAT = 3.7V
RIOST=91kΩ
(4)
600
450
300
150
0
0
0.4
0.8
Output current(A)
Figure 14. VIOST VS. output current
1.2
1.6
2.0
2.4
Figure 10. Battery fast charge current setting
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
Battery Impedance Compensation
An external resistor is used to set the impedance
from 40mΩ to 500mΩ as shown in Figure 15. RIMC
is corresponding to battery impedance. Higher RIMC
gives higher compensation voltage which is
positively proportional to battery charge/discharge
current.
Select RIMC based on battery impedance:
25 R (m )
Rcs (m )
Figure 17. Boost output auto detection circuit
(6)
(7)
R
IMC(k )
External Input Over Voltage Protection
VBAT(V ) BAT(V )IBAT(A)R(m )10-3
Considering the maximum voltage rating at VIN pin,
the external OVP circuit as shown in Figure 18 is
recommended if input voltage may go higher than
7V. With the enhanced OVP circuit, the design can
pass UN38.3.
Figure 15. Battery impedance compensation setting circuit
The battery impedance as shown in the table 4
according to the RIMC and Rcs:
Table 4: Battery Impedance
Figure 18. Input over voltage protection
RIMC(KΩ)
50
50
100
100
200
200
200
400
Inductor and Capacitor Selection
Battery
Rcs=25mΩ
Rcs=50mΩ
Impedance
ACT2802/ACT2802B/ACT2802C supports SMD
components. 2.2uH inductor is recommended.
Input side, 4.7uF ceramic capacitor in series with
2.7Ω resistor are recommended, on battery side,
22uF ceramic capacitor is recommended while on
output side, 3*22uF ceramic capacitors are
recommended.
100
R(mΩ)
Input Over Voltage Surge
In the case of pure ceramic input capacitor is
chosen, if the input cable is long, stray inductance
may cause over voltage spikes as twice as the
steady-state voltage when input source is plugged
in. Below input circuit is recommended to avoid
input voltage surge. R1 resistor is added in series
with capacitor C1 to damp the potential LC
resonance as shown in Figure 16.
Battery Temperature Monitoring
ACT2802 continuously monitors the temperature of
the battery pack by sensing the resistance of its
thermistor, and suspends charging if the
temperature of the battery pack exceeds the safety
limits.
In a typical application, the TH pin is connected to
the battery pack's thermistor input as shown in
Figure 19. The ACT2802 injects a 60µA current out of
the TH pin into the thermistor, so that the thermistor
resistance is monitored by comparing the voltage at
TH to the internal VTHL and VTHH thresholds of 0.3V
and 1.5V, respectively. When VTH > VTHH or VTH < VTHL
charging and the charge timers are suspended. When
VTH returns to the normal range, charging and the
charge timers resume.
Figure 16. Input over voltage surge protection circuit
Boost Output Plug-in Auto Detection
Figure 17 provides a solution for auto plug-in
detection.
The threshold is given by:
Innovative PowerTM
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
60µA×RNOM×kHOT=0.3V→ RNOM×kHOT=5kꢀ
60µA×RNOM×kCOLD=1.5V → RNOM×kCOLD= 25kꢀ
where RNOM is the nominal thermistor resistance at
room temperature, and kHOT and kCOLD are the ratios
of the thermistor's resistance at the desired hot and
cold thresholds, respectively.
Figure 19. Battery thermal circuit
Innovative PowerTM
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
PC Board Layout Guidance
When laying out the printed circuit board, the
following checklist should be used to ensure proper
operation of the IC.
1. Arrange the power components to reduce the
AC loop size, VIN pin, Vout pin, SW pin and the
schottky diode.
goes under the C2 (recommend C2 to use 1206
size). SW pad is a noisy node switching. It
should be isolated away from the rest of circuit
for good EMI and low noise operation.
6. Thermal pad is connected to GND layer through
vias (recommend 4X4 pins and the aperture is
10mil). Ground plane, PGND and AGND is
single point connected under the ACT2802/
ACT2802B/ACT2802C thermal pad through
vias to limited SW area.
2. Place input decoupling ceramic capacitor C3
and R10 as close to VIN pin as possible.
Resistor R10 is added in series with capacitor
C3 to damp the potential LC resonance .
7. From BAT pin to the Battery positive terminal,
need to lay the divided line to ensure the
battery voltage accuracy of sampling.
3. Use copper plane for power GND for best heat
dissipation and noise immunity.
4. Place CSP and CSN capacitor C6 (10nF) close
to CSP and CSN pin as possible, use Kevin
Sense from sense resistor R2 and R2A to CSP
and CSN pins. 22uF decoupling capacitor is
added close to BAT pin.
8. RC snubber is recommended to add across SW
to PGND to reduce SW spike below 7V.
3A /20V schottky is added to across VOUT and
SW pins.
A demo board PCB layout example is shown in the
figure 20.
5. Place the ceramic capacitor C2 and D1 as
close to VOUT and PGND as possible, SW
Figure 20.
PCB Layout
Bottom Layer
Top Layer
Innovative PowerTM
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
Figure 21. ACT2802 typical application circuit
(Input current limit 3.0A, fast charge current limit 2.1A, boost output constant current limit 2.4A)
Innovative PowerTM
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
Table 5: BOM List
ITEM REFERENCE
DESCRIPTION
QTY
1
MANUFACTURER
Sunlord
1
L1
Core 6.5*3*3 Dip 2.2uH 6A
2
Q1
AO4503, Rdson=19mꢀ at VGS = - 4.5 V
MMBT3906
1
AOS
3
Q3
D1
1
Murata/TDK
Diodes
4
MBR1020VL, 20V/1A Schottky
1
5
D2
1N4148, Vf=0.7V, 75V Schottky
1
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
SART
6
C2,C5,C13,C14
C3
Ceramic capacitor, 22uF/10V, X7R, 1206
Ceramic capacitor, 4.7uF/10V, X7R, 1206
Ceramic capacitor, 0.1uF/10V, X7R, 0603
Ceramic capacitor, 10nF/10V, X7R, 0603
Ceramic capacitor, 4.7nF/10V, X7R, 0603
Ceramic capacitor, 2.2uF/10V, X7R, 0603
Ceramic capacitor, 4.7uF/10V, X7R, 0603
Chip Resistor, 750ꢀ, 1/10W, 1%, 0603
Chip Resistor, 50mꢀ, 1/4W, 1%, 1206
Chip Resistor, 93.1kꢀ, 1/10W, 1%, 0603
Chip Resistor, 43.2kꢀ, 1/10W, 1%, 0603
Chip Resistor, 25kꢀ, 1/10W, 1%, 0603
Chip Resistor, 10kꢀ, 1/10W, 5%, 0603
Chip Resistor, 60kꢀ, 1/10W, 1%, 0603
Chip Resistor, 80kꢀ, 1/10W, 1%, 0603
Chip Resistor, 0.47ꢀ, 1/8W, 5%, 0805
Chip Resistor, 2.7ꢀ, 1/4W, 5%, 1206
Chip Resistor, 200kꢀ, 1/10W, 5%, 0603
Chip Resistor, 715kꢀ, 1/10W, 5%, 0603
Chip Resistor, 49.9kꢀ, 1/10W, 5%, 0603
Chip Resistor, 75kꢀ, 1/10W, 1%, 0603
Chip Resistor, 100kꢀ, 1/10W, 5%, 0603
Chip Resistor, 2.2ꢀ, 1/10W, 5%, 0603
Chip Resistor, 100ꢀ, 1/10W, 5%, 0603
4
7
1
8
C4
1
9
C6
1
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
C7
1
C8,C11,C12
C16
3
1
R1
1
R2,R2A
R3
2
1
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
R4,R15
R5
2
1
R6
1
R7
1
R8
1
R9
1
R10
1
R11
1
R12,R13
R14,R16
R17
2
2
1
R18,R20
R21
2
1
R23
1
LED1,LED2,
LED3,LED4
30
LED, 0603, Blue
4
LED Manu
31
32
33
34
PB
USB
Push Button Switch
10.2*14.6*7mm, 4P
Nikkai Omron
1
1
1
1
Micro-USB
U1
MICRO USB 5P/F SMTB
IC, ACT2802QL-T1028, T-QFN 44-24
ACT
Innovative PowerTM
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
R12
HZ
LED1
PB
R23
R5
PB
BTV
R4
AGND
nPG
ICST
IOST
R3
R13
R11
C11
R1
C12
CSN
CSP
ILIM
VIN
Input USB
C6
R2
+
D-
R10
C3
D+
-
D2
C2
D1
C8
R18
Q1
+
L1
D-
R9
C7
C16
Q3
D+
-
R20
R2A
C5
R21
Output USB
BAT
R15
R17
R16
C13
C14
C4
R14
Figure 22. ACT2802B/ACT2802C typical application circuit
(Input current limit 3.0A, fast charge current limit 2.1A, boost output constant current limit 2.4A)
Innovative PowerTM
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
Table 6: BOM List
ITEM
1
REFERENCE
DESCRIPTION
QTY MANUFACTURER
L1
Core 6.5*3*3 Dip 2.2uH 6A
1
1
1
1
1
4
1
1
1
1
3
1
1
2
1
2
1
1
1
1
1
1
2
2
1
2
1
1
1
4
1
1
1
1
Sunlord
AOS
2
Q1
AO4503, Rdson=19mꢀ at VGS = - 4.5 V
MMBT3906
3
Q3
Murata/TDK
Panjit
4
D1
MBR1020VL, 20V/1A Schottky
5
D2
1N4148, Vf=0.7V, 75V Schottky
Ceramic capacitor, 22uF/10V, X7R, 1206
Ceramic capacitor, 4.7uF/10V, X7R, 1206
Ceramic capacitor, 0.1uF/10V, X7R, 0603
Ceramic capacitor, 10nF/10V, X7R, 0603
Ceramic capacitor, 4.7nF/10V, X7R, 0603
Ceramic capacitor, 2.2uF/10V, X7R, 0603
Ceramic capacitor, 4.7uF/10V, X7R, 0603
Chip Resistor, 750ꢀ, 1/10W, 1%, 0603
Chip Resistor, 50mꢀ, 1/4W, 1%, 1206
Chip Resistor, 93.1kꢀ, 1/10W, 1%, 0603
Chip Resistor, 43.2kꢀ, 1/10W, 1%, 0603
Chip Resistor, 25kꢀ, 1/10W, 1%, 0603
Chip Resistor, 60kꢀ, 1/10W, 1%, 0603
Chip Resistor, 80kꢀ, 1/10W, 1%, 0603
Chip Resistor, 0.47ꢀ, 1/8W, 5%, 0805
Chip Resistor, 2.7ꢀ, 1/4W, 5%, 1206
Chip Resistor, 200kꢀ, 1/10W, 5%, 0603
Chip Resistor, 715kꢀ, 1/10W, 5%, 0603
Chip Resistor, 49.9kꢀ, 1/10W, 5%, 0603
Chip Resistor, 75kꢀ, 1/10W, 1%, 0603
Chip Resistor, 100kꢀ, 1/10W, 5%, 0603
Chip Resistor, 2.2ꢀ, 1/10W, 5%, 0603
Chip Resistor, 51ꢀ, 1/8W, 5%, 0805
Chip Resistor, 100ꢀ, 1/10W, 5%, 0603
LED, 0603, Blue
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
SART
6
C2,C5,C13,C14
7
C3
8
C4
9
C6
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
C7
C8,C11,C12
C16
R1
R2,R2A
R3
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
Murata/TDK
LED Manu
LED Manu
Nikkai Omron
R4,R15
R5
R7
R8
R9
R10
R11
R12,R13
R14,R16
R17
R18,R20
R21
R22
R23
LED1,LED2, LED3,LED4
LED
PB
Flashlight
Push Button Switch
USB
10.2*14.6*7mm, 4P
Micro-USB
MICRO USB 5P/F SMTB
IC, ACT2802BQL-T1028/ACT2802CQL-T1028,
T-QFN 44-24
35
U1
1
ACT
Innovative PowerTM
- 21 -
www.active-semi.com
Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
TYPICAL PERFORMANCE CHARACTERISTICS CONT’D
(Schematic as show in Figure 21, Ta = 25°C, unless otherwise specified)
Charge Current VS. Output Current
Battery Charge V/I Profile
2500
2000
1500
1000
3000
VIN = 5.0V
VBAT = 3.5V
VIN = 5.0V
ICHRG = 2.1A
2500
2000
Input Current
1500
Charge Current
1000
500
0
500
0
0
500
1000
1500
2000
2500
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
Output Current (mA)
Vbat (V)
Charge Efficiency
Boost Efficiency
100.0
90.0
80.0
70.0
60.0
50.0
40.0
92.0
91.5
91.0
90.5
90.0
VIN = 5.0V
ICHRG = 2.1A
VBAT = 3.2V
VBAT = 3.7V
VBAT = 4.1V
89.5
89.0
0
300
600
900 1200 1500 1800 2100 2400
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Output Current (mA)
Vbat (V)
Battery Leakage VS. Temperature
(HZ Mode)
Battery Charge Current VS. Temperature
25.0
20.0
15.0
10.0
3000
VIN = 5.0V
VBAT = 3.5V
2500
2000
1500
1000
VBAT = 3.5V
VBAT = 4.1V
5.0
0
500
0
-20
0
20
40
60
80
100
120
140
-20
0
20
40
60
80
100
120
Temperature (°C)
Temperature (°C)
Innovative PowerTM
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
TYPICAL PERFORMANCE CHARACTERISTICS CONT’D
(Schematic as show in Figure 21, Ta = 25°C, unless otherwise specified)
Boost Output Constant Current Limit
Boost Output Voltage VS. Temperature
VS. Temperature
3000
5.4
5.3
5.2
5.1
5.0
VBAT = 3.5V
CV= 4.5V
Rcs=25mꢀ(1%)
VBAT = 3.5V
VOUT = 5.05V
2800
2600
2400
2200
2000
1800
4.9
4.8
-20
0
20
40
60
80
100
120
140
-30
0
30
60
90
120
150
Temperature (°C)
Temperature (°C)
Boost Output Voltage VS. Output Current
Boost Output Constant Current Limit VS. VBAT
5.1
5.06
5.02
4.98
4.94
4.9
2550
2500
2450
2400
2350
VBAT=4.1V
VBAT = 3.2V
2300
2250
0
500
1000
1500
2000
2500
3000
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Boost Output Current (mA)
Vbat (V)
Battery Leakage VS. Battery Voltage
(HZ Mode)
Boost Standby Current VS. Battery Voltage
8.0
7.0
6.0
5.0
4.0
3.0
2.0
057
0.55
0.53
0.51
0.49
0.47
0.45
1.0
0
0
1.0
2.0
3.0
4.0
5.0
3.0
3.3
3.6
3.9
4.2
45
4.8
Battery Voltage(V)
Battery Voltage(V)
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
TYPICAL PERFORMANCE CHARACTERISTICS CONT’D
(Schematic as show in Figure 21, Ta = 25°C, unless otherwise specified)
Boost Load Transient (80mA-1A-80mA)
Boost Load Transient (1A-2.1A-1A)
VBAT = 3.4V
VOUT = 5.0V
IIOST = 2.4A
V
= 3.4V
= 5.0V
= 2.4A
BAT
V
OUT
I
IOST
CH1
CH1
CH2
CH2
CH1: VOUT, 200mV/div
CH2: IOUT, 1A/div
TIME: 400µs/div
CH1: VOUT, 100mV/div
CH2: IOUT, 1A/div
TIME: 400µs/div
SW and Output Waveforms in Boost Mode
SW and Output Waveforms in Boost Mode
VBAT = 4.1V
VOUT = 5.0V
IOUT = 2.4A
VBAT = 3.4V
VOUT = 5.0V
IOUT = 2.4A
CH1
CH1
CH2
CH2
CH1: VOUT, 20mV/div
CH2: VSW, 2V/div
TIME: 1µs/div
CH1: VOUT, 20mV/div
CH2: VSW, 2V/div
TIME: 1µs/div
Transition Between Buck Mode
and Boost Mode
VIN = 5.0V
VBAT = 4.1V
VIN
CH1
VnPG
CH2
CH3
VOUT
CH1: VIN, 5V/div
CH2: VnPG, 5V/div
CH3: VOUT, 2V/div
TIME: 1s/div
Innovative PowerTM
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Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Rev 7, 15-Jul-16
PACKAGE OUTLINE
QFN44-24 PACKAGE OUTLINE AND DIMENSIONS
DIMENSION IN
MILLIMETERS
DIMENSION IN
INCHES
SYMBOL
MIN
0.700
0.000
MAX
1.000
0.050
MIN
0.028
0.000
MAX
0.040
0.002
A
A1
A3
b
0.200 REF
0.008 REF
0.180
0.300
0.007
0.012
D
4.000 BSC
4.000 BSC
0.160 BSC
0.160 BSC
E
D2
E2
e
2.500
2.800
2.800
0.098
0.110
0.110
2.500
0.350
0.098
0.014
0.500 BSC
0.020 BSC
L
0.450
---
0.018
---
R
0.200 TYP
0.008 TYP
K
0.200
0.008
Active-Semi, Inc. reserves the right to modify the circuitry or specifications without notice. Users should evaluate each
product to make sure that it is suitable for their applications. Active-Semi products are not intended or authorized for use
as critical components in life-support devices or systems. Active-Semi, Inc. does not assume any liability arising out of
the use of any product or circuit described in this datasheet, nor does it convey any patent license.
Active-Semi and its logo are trademarks of Active-Semi, Inc. For more information on this and other products, contact
sales@active-semi.com or visit http://www.active-semi.com.
is a registered trademark of Active-Semi.
Innovative PowerTM
- 25 -
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Copyright © 2016 Active-Semi, Inc.
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Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9130CG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9130LG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9130_11
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9137
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9137LG
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9122E
500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification DriversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
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