E-CMOS EC49016X-F Schematic [ru]
EC49016
Standalone Linear Lithium Battery Charger
Introduction
(General Description)
EC49016 is a complete constant-current & constant
voltage linear charger for single cell lithium-ion
batteries. Its SOT-23 package and low external
component count make EC49016 ideally suited for
portable applications. Furthermore, the EC49016 is
specifically designed to work within USB power
specification. At the same time, EC49016 can also be
used in the standalone lithium-ion battery charger.
No external sense resistor is needed, and no
blocking diode is required due to the internal MOSFET
architecture. Thermal feedback regulates the charger
current to limit the die temperature during high power
operation or high ambient temperature. The charge
voltage is fixed at 4.2V, and the charge current can be
programmed externally with a single resistor. The
EC49016 automatically terminates the charge cycle
when the charge current drops to 1/10
programmed value after the final float voltage is
reached.
When the input supply (wall adapter or USB supply)
is removed, the EC49016 automatically enters a low
current stage, dropping the battery drain current to less
than 2μA. The EC49016 can be put into shutdown
mode, reducing the supply current to 20μA.
Other features include charge current monitor,
under-voltage lockout, automatic recharge and a status
pin to indicate charge termination and the presence of
an input voltage.
Ordering/Marking Information
th
the
Features
z Programmable Charge Current Up to 800mA
z No MOSFET, Sense Resistor or Blocking Diode
Required
z Constant-Current/Constant-Voltage Operation
with Thermal Protection to Maximize Charge
Rate without Risk of Overheating
z Charges Single Cell Li-ion Batteries Directly
from USB Port
z Preset 4.2V Charge Voltage with +-1% Accuracy
z 20μA Supply Current in Shutdown
z 2.9V Trickle Charge Threshold
z Available Without Trickle Charge
z Soft-Start Limits Inrush Current
z Available in 5-Lead SOT-23 Package
Applications
z Cellular Telephones, PDA, MP3 Players
z Charging Docks and Cradles
z Bluetooth Applications
Pin Configuration
016b*
Package Part Number Marking Marking Information
Starting with 6, a bar on top
of 6 is for production year 2005,
and underlined 6 is for year
2006. The naming pattern
SOT-23-5L
EC49016B2-F 016
continues with consecutive
b
characters for later years.
The last character is the week
code. (A-Z: 1-26, a-z: 27-52)
A dot on top right corner is for
lead-free process.
E-CMOS Corp. (www.ecmos.com.tw
) Page 1 of 8 2006/05/18
Ordering Information
EC49016X - F
F: Lead-Free
Package: B2 = SOT-23-5L
EC49016
Standalone Linear Lithium Battery Charger
Absolute Maximum Rating
Parameter Symbol Value Units
Input Supply Voltage VCC 8 V
PROG Voltage V
BAT Voltage V
CHRG Voltage V
BAT Short-Circuit Duration — Continuous —
Thermal Resistance, Junction-to-Ambient ΘJA 250 (SOT-23-5) °C/W
BAT Pin Current I
PROG Pin Current I
Maximum Junction Temperature TJ 125 °C
Storage Temperature TS -65 to +125 °C
Lead Temperature (Soldering, 10 sec) — 300 °C
(1)
VCC+0.3 V
PROG
7 V
BAT
10 V
CHRG
800 mA
BAT
800
PROG
μA
(2)
Recommended Operating Conditions
Parameter Symbol Value Units
Supply Input Voltage VIN -0.3 to +8 V
Junction Temperature TJ -40 to +85 °C
Electrical Characteristics
VIN = 5V; TJ = 25°C; unless otherwise specified.
Symbol Parameter
VCC Input Supply Voltage 4.25 — 6 V
Charge Mode
ICC
V
Regulated Output (Float) Voltage I
FLOAT
I
BAT
I
Trickle Charge Current V
TRIKL
V
Trickle Charge Threshold Voltage R
TRIKL
Input Supply Current
BAT Pin Current
Standby Mode (Charge Terminated)
Shutdown Mode(R
R
R
Standby Mode, VBAT = 4.2V
Shutdown Mode (R
Conditions Min Typ Max Unit
(3)
, R
PROG
< V
V
CC
= 30mA, I
BAT
PROG
PROG
Sleep Mode, V
< V
BAT
PROG
, or VCC < VUV)
BAT
CHRG
= 10k, Current Mode 90 110 130 mA
= 2k, Current Mode — 500 — mA
PROG
, R
TRIKL
= 10k, V
= 10k — 110 500 µA
PROG
—
115 160 µA
Not Connected,
= 5mA 4.158 4.2 4.242 V
Not Connected)
= 0V
CC
= 10k 12 18 25 mA
PROG
Rising 2.8 2.9 3.0 V
BAT
—
0 +/-1 +/-5
— +/-0.5 +/-5
— +/-1 +/-5
20 40 µA
µA
µA
µA
E-CMOS Corp. (www.ecmos.com.tw
) Page 2 of 8 2006/05/18
EC49016
Standalone Linear Lithium Battery Charger
Electrical Characteristics (Continued)
= 5V; TJ = 25°C; unless otherwise specified
V
IN
Symbol Parameter Conditions Min Typ Max Unit
VUV VCC Undervoltage Lockout Threshold From V
V
ΔV
V
UVHYS
MSD
ASD
TERM
V
PROG Pin Voltage R
PROG
I
CHRG Pin Weak Pull-Down Current V
CHRG
V
CHRG Pin Output Low Voltage I
CHRG
RECHRG
T
Thermal Protection Temperature — 120 — °C
LIM
Undervoltage Lockout Hysteresis — 170 — mV
CC
Manual Shutdown Threshold Voltage
V
– V
CC
C/10 Termination Current Threshold
Recharge Battery Threshold Voltage V
Lockout Threshold Voltage
BAT
PROG
PROG Pin Rising — 1.25 — V V
PROG Pin Falling
V
CC
V
CC
Low to High — 3.4 — V
CC
—
1.2
from Low to High — 100 — mV V
—
—
30
0.1
from High to Low
R
PROG
R
PROG
= 10k, Current Mode 0.9 1.03 1.1 V
CHRG
CHRG
- V
FLOAT
(4)
= 10k
= 5mA — 0.35 0.8 V
— 0.1 — mA/mAI
= 2k
= 5V 8 20 40 µA
— 100 — mV
RECHRG
—
—
—
V
mV
mA/mA
tSS Soft-Start Time I
t
RECHARGE
t
I
Note 1: Exceeding the absolute maximum rating may damage the device.
Note 2: The device is not guaranteed to function outside its operating rating.
Note 3: Supply current includes PROG pin current (approximately 100µA) but does not include any current delivered to the
Note 4: I
Recharge Comparator Filter Time V
Termination Comparator Filter Time I
TERM
PROG Pin Pull-Up Current — 1 — µA
PROG
battery through the BAT pin (approximately 100mA).
is expressed as a fraction of measured full charge current with indicated PROG resistor.
TERM
= 0 to 1000V/R
BAT
High to Low — 2 — ms
BAT
Falling Below I
BAT
— 100 — µs
PROG
/10 — 1000 — µs
CHG
E-CMOS Corp. (www.ecmos.com.tw
) Page 3 of 8 2006/05/18
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