SE9014 Datasheet, PDF (3/11 Pages) Seaward Electronics Inc. – Standalon Linear Lithum Battery Charger

Electrical Characteristics (Continued)
V_IN = 5V; T_J = 25°C; unless otherwise specified
Symbol
Parameter
V_UV
V_CC Undervoltage Lockout Threshold
V_UVHYS
V_CC Undervoltage Lockout Hysteresis
V_MSD
Manual Shutdown Threshold Voltage
Conditions
From V_CC Low to High
PROG Pin Rising
PROG Pin Falling
V_ASD
I_TERM
V_PROG
I_CHRG
V_CHRG
Δ V_RECHRG
T_LIM
t_SS
t_RECHARGE
t_TERM
I_PROG
V_CC – V_BAT Lockout Threshold Voltage
C/10 Termination Current Threshold
V_CC from Low to High
V_CC from High to Low
R_PROG = 10k⁽⁴⁾
R_PROG = 2k
PROG Pin Voltage
CHRG Pin Weak Pull-Down Current
CHRG Pin Output Low Voltage
Recharge Battery Threshold Voltage
Thermal Protection Temperature
R_PROG = 10k, Current Mode
V_CHRG = 3V
I_CHRG = 5mA
V_FLOAT - V_RECHRG
Soft-Start Time
Recharge Comparator Filter Time
Termination Comparator Filter Time
PROG Pin Pull-Up Current
I_BAT = 0 to 1000V/R_PROG
V_BAT High to Low
I_BAT Falling Below I_CHG/10
Min Typ Max Unit
3.4
V
100
mV
1.25
V
1.2
V
100
mV
30
mV
0.1
mA/mA
0.1
mA/mA
0.9 1.03 1.1
V
15
µA
0.6
V
150
mV
120
°C
100
µs
1
ms
1000
µs
1
µA
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 battery
through the BAT pin (approximately 100mA).
Note 4: ITERM is expressed as a fraction of measured full charge current with indicated PROG resistor.
Pin Functions
Pin Pin Function Description
Pin
Pin Function Description
P Positive Input Supply Voltage. Provides
VCC ^{power to the charger. VCC can range}
from 4.25V to 6.5V and should be
bypassed with at least a 1F capacitor.
CHRG
Open-Drain Charge Status Output. When the battery is charging, the
CHRG pin is pulled low by an internal N-channel MOSFET. When the
charge cycle is completed, a weak pull-down of approximately 20uA is
connected to the CHRG pin, indicating an ―AC present‖ condition.
GND
Ground.
PROG Charge Current Program, Charge Current Monitor and Shutdown Pin.
BAT
Charge Current Output. Provides
charge current to the battery and
regulates the final float voltage to 4.2V.
CHRGT
Open-Drain Charge Termination Status Output. When the battery is
charging, the CHRGT pin is pulled high by an external component
such as an LED. After the charging is completed, this pin is pulled low
by internal N-channel MOSFET and it can be used as a charging
termination indicator.
Revision 9/12/2014
Preliminary and all contents are subject to change without prior notice
© Seaward Electronics Inc., 2014. • www.seawardinc.com.cn • Page 3