ACE4102E

ACE4102E
2.5A, 3MHz Switching Charger with Dynamic Power Path Management
Description
ACE4102E is a switching Li-Ion battery charger with dynamic power-path control and input current
limiting. When a battery is connected, depending on the battery voltage, the DC-DC switching regulator
either pre-conditions, fast-charges the battery or just regulates a system voltage (VSYS) to a preset voltage.
It does not require an external sense resistor for current sensing. The charging current is determined by
programming ISET1 or ISET2 pin, depending on the state of the USB_DET. If USB_DET is low, indicating
an valid AC adapter input is present, the charge current is set by ISET1; otherwise, it is set by ISET2.
When the battery voltage reaches the termination voltage i.e. 4.2V/4.35V, the charging path disconnects
SYS to BATT. The ACE4102E also includes a dynamic power path when the SYS load current exceeds
current limit of the DCDC regulator internally set, the SYS voltage falls below VBATT, ACE4102E turns on
the power-path to supplement the system load through the batter.
Features
•
•
•
•
•
•
•
•
Switching Charger with Power Path Management
Up to 95% DC-DC Efficiency
50mΩ Power Path MOSFET
Up to 2.5A Max charging current
Instant on with a dead Battery or no Battery
No battery detection
No External Sense resistor
Programmable USB and AC IN Charging Current
Application
•
•
•
Tablet, MID
Smart Phone
Power Bank
Typical Application
ACE4102E
2A Switching Charger with Dynamic Power Path
VER 1.1
1
ACE4102E
2.5A, 3MHz Switching Charger with Dynamic Power Path Management
Absolute Maximum Ratings
Parameter
Max
IN, BATT Voltage
-0.3V ~ 6V
All Other Pin Voltage
VIN-0.3V ~ VIN0.3V
SW,SYS,BATT to ground current
Internally limited
Operating Temperature Range
-40 OC ~85 OC
Storage Temperature Range
-55 OC ~150 OC
θJA
50
Thermal Resistance
O
C/W
(Note: Exceeding these limits may damage the device. Exposure to absolute maximum rating conditions for long periods may
affect device reliability.)
Packaging Type
USB_DET
BATT
SYS
BATT
QFN3x3-16
SYS
ISET2
SW
STAT
GND
GND
NTC
SW
ENB
ISET1
PGND
IN
QFN3x3-16 Description
Function
System Voltage Pin. It is also the Switching regulator’s output pin. Connect and
1.15
SYS
2
IN
3.4
SW
5
PGND
6
ENB
7
NTC
Thermistor input
8.10
GND
Analog Ground Pin. Bypass with a 10uF capacitor to IN
inductor and capacitor to form the output filter
Input pin. Can be connected to an AC adaptor or a USB charger output. Bypass with
a 10uF capacitor each to GND and PGND
Switching node of the Switching Regulator. Connect a 1uH to 2.2uH inductor from
this pin to SYS
Power Ground. Bypass with a 10uF capacitor to IN with a shortest possible trace
Active Low Enable pin. Tie this pin low to enable the Charging, tie high to disable
Charging, while still keeping powerpath from BATT to SYS
VER 1.1
2
ACE4102E
2.5A, 3MHz Switching Charger with Dynamic Power Path Management
9
STATS
Status pin for Charging status indications. An open drain device capable of driving
10mA current
AC Fast Charge Current set pin for AC input. Connecting a Resistor between ISET1
11
ISET1
to GND This sets the fast charge current value for AC adapter when
USB_DET is
low.
12
ISET2
USB Charge Current set pin for USB input. Connecting a Resistor between
ISET2
to GND This sets the charge current value for USB input when USB_DET is high.
Charge current selecting input. Pull this pin low if an AC adapter is connected and
13
USB_DET
select fast charging current to be set by ISET1. And set this pin high if a USB input is
connected and select USB charging current to be set by ISET2. It is default low.
14.16
BATT
Battery pin. Connect a Battery to this pin
Ordering information
ACE4102E XX XX + H
Halogen - free
Pb - free
CN: QFN3*3-16
42 ------- 4.2V
43 ------- 4.35V
Electrical Characteristics
O
(VIN = 5V, unless otherwise specified. Typical values are at TA = 25 C )
Parameter
Conditions
Min
Typ
Max
Units
5.5
V
IN INPUT
INPUT Range
INPUT UVLO
4.4
Rising, Hys=500mV
4.35
V
Switcher Enable, Switching
5
Switcher Enable, No Switching
70
uA
uA
Input Floating
0
ISYS=1A, Default
3.6
V
VSYSMAX
4.5
V
Load Regulation
40
mV/A
0.04
%/V
3
MHz
INPUT Operating Current
BATT to INPUT leakage Current
5
uA
DC-DC and SYS OUTPUT
VSYSMIN
Line Regulation
VIN =4.75 to 5.25V
Switching Frequency
Max duty
100
%
HIGHSIDE MOS RDSON
ISW =500mA
100
mΩ
LOWSIDE MOS RDSON
ISW =500mA
60
mΩ
3.5
A
HIGHSIDE Current limit
VER 1.1
3
ACE4102E
2.5A, 3MHz Switching Charger with Dynamic Power Path Management
SYS UVLO
Falling, Hys=200mV
Thermal Shutdown
2.25
Rising, Hys=30oC
V
O
160
C
POWER PATH Management
BATT TO SYS RDSON
50
mΩ
BATTERY CHARGER
Battery CV voltage
Charger Restart Threshold
IBAT =0mA, default
4.16
4.2
4.24
4.307
4.35
4.393
V
From DONE to FastCharge
-200
mV
VBAT Rising Hys=180mV
2.9
V
100
mA
2
A
0.5
A
Pre-condition Timer
120
min
Fast-Charge Timer
120
min
Battery Pre-condition Voltage
Pre-Condition Charge Current
AC Fast Charge Current
USB Charge Current
RISET1 =500Ω, USB_DET= low
Icharge=1V*1000/RISET1
RISET2 =2KΩ, USB_DET= high
Icharge=1V*1000/RISET2
THERMISTOR MONITOR
NTC Threshold, Cold
Charger Suspended
76.5
%VIN
NTC Threshold, Hot
Charger Suspended
35
%VIN
NTC Threshold Hysteresis
1.5
%VIN
NTC Disable Threshold
100
mV
0
uA
NTC Input Leakage
LOGIC INPUT, STATS
ENB Logic Input High
1.6
ENB Logic Input Low
STAT Output Low Voltage
ISTATS=10mA
V
0.3
V
0.2
V
Typical Characteristics
Efficiency Vs
ISYS Charger Disabled
IOUT (A)
ICharge Vs
VBATT
VBATT (V)
IPre-Charge Vs
VBATT
VBATT (V)
VER 1.1
4
ACE4102E
2.5A, 3MHz Switching Charger with Dynamic Power Path Management
VSYS VS ISYS
ISYS (A)
Battery Inserted During Detection
VSYS VS Temperature
ICharge Vs Temperature
Thermal Foldback
Temperature(℃)
Temperature(℃)
Battery Pulled During Charging
IN Plug-In with Battery
Connected
1s/div
VSYS Load Step Into Reduce Charging
50ms/div
0.5s/div
VSYS Load Step Into Supplement Mode
50ms/div
5ms/div
VSYS Load Step Into IN DPPM
Mode, IIN LIMIT=0.5A
50ms/div
VER 1.1
5
ACE4102E
2.5A, 3MHz Switching Charger with Dynamic Power Path Management
DCDC PFM SWITCHING WAVEFROM
ISYS=10mA
10ms/div
DCDC PWM SWITCHING WAVEFORM
ISYS=2A
0.5us/div
IN UNPLUGGED
200us/div
TYPICAL APPLICATION
2A Switching Charger with Dynamic Power Path with OVP protection and Charge Enable
VER 1.1
6
ACE4102E
2.5A, 3MHz Switching Charger with Dynamic Power Path Management
PCB GUIDELINE
PCB layout cautions of ACE4102E is shown below. The input capacitor (Cin) between Vin (Pin2) and
PGND (Pin5) is always to be placed closest to the IC. SW wire can be laid through the gap between the 2
Cin terminals. It can go underneath the Cin. For all pins that needs to shorted to GND, please connect them
to GND (Pin10), not to PGND (Pin5). A real PCB layout example is also listed below for reference.
PCB cautions of ACE4102E
Real DEMO board PCB for reference
VER 1.1
7
ACE4102E
2.5A, 3MHz Switching Charger with Dynamic Power Path Management
Packing Information
QFN3*3-16
NOTE: ALL DIMENSIONS REFER TO JEDEC STANDRAD MO-220 WEED-4.
Symbol
A
A1
A3
b
D
E
D2
E2
e
K
L
R
Min.
0.70
0.20
2.90
2.90
1.55
1.55
0.40
0.20
0.35
0.09
Dimensions in millimeters
Nom.
0.75
0.02
0.20REF
0.25
3.00
3.00
1.65
1.65
0.50
0.40
-
Max.
0.80
0.05
0.30
3.10
3.10
1.75
1.75
0.60
0.45
-
VER 1.1
8
ACE4102E
2.5A, 3MHz Switching Charger with Dynamic Power Path Management
Notes
ACE does not assume any responsibility for use as critical components in life support devices or systems
without the express written approval of the president and general counsel of ACE Electronics Co., LTD. As
sued herein:
1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into
the body, or (b) support or sustain life, and shoes failure to perform when properly used in accordance
with instructions for use provided in the labeling, can be reasonably expected to result in a significant
injury to the user.
2. A critical component is any component of a life support device or system whose failure to perform can
be reasonably expected to cause the failure of the life support device or system, or to affect its safety or
effectiveness.
ACE Technology Co., LTD.
http://www.ace-ele.com/
VER 1.1
9