LP4069T-03 May.-2021 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 9
Preliminary Datasheet LP4069T
800mA Single Chip Li-Ion and Li-Polymer Charger
General Description
The LP4069T is a complete constant-current/
constant voltage linear charger for single cell
lithium-ion battery. No external sense resistor is
needed, and no blocking diode is required due to the
internal MOSFET architecture. Thermal feedback
regulates the charge current to limit the die
temperature during high power operation or high
ambient temperature. The charge voltage is fixed at
V
FLOAT
, and the charge current can be programmed
externally by ISET pin with a single resistor.
The LP4069T automatically terminates the charge
cycle when the charge current drops to 1/10 setting
current value after the final float voltage is reached.
Other features include charge current monitor, under
voltage lockout, automatic recharge, status pins and
battery temperature detection.
Order Information
LP4069T
F: Pb-Free
Package Type
QV: TDFN-8
Battery Voltage
Default: 4.2V
435: 4.35V
Features
Input Voltage up to 28V
Input Over Voltage Protection：7V
Short-circuit protection
Programmable Charge Current up to 800mA
1µA Battery Reverse Current
Over temperature Sensing Protection
Protection of Reverse Connection of Battery
Constant-Current/Constant-Voltage Operation
with Thermal Regulation
TDFN-8 Package
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Portable Media Players/Game
Power Bank
Bluetooth Applications
PDA/MID
Marking Information
Device
Marking
Package
Shipping
LP4069TQVF
LP4069
TYWX
TDFN-8
4K/REEL
LP4069TQVF-
435
LP4069
435YWX
TDFN-8
4K/REEL
Marking indication:
Y:Production year W:Production week X: Series Number
LP4069T-03 May.-2021 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 2 of 9
Preliminary Datasheet LP4069T
Functional Pin Description
Package Type
Pin Configurations
TDFN-8
8
7
6
5
1
2
3
4
GND
9(PAD)
BAT
ISET
TDFN-8
(Top View)
TS
GND
IN
FULL
CHRG
EN
Pin Description
No.
NAME
DESCRIPTION
1
IN
IN is the input power source. Connect to a wall adapter.
2
FULL
Open-Drain Charge Status Output. When the battery is charging, the FULL pin could be
pulled High by an external pull high resistor. When the charge cycle is completed, the
pin is pulled Low by an internal N-MOS.
3
CHRG
Open-Drain Charge Status Output. When the battery is charging, the CHRG pin is
pulled low by an internal N-MOS. When the charge cycle is completed, the pin could be
pulled High by an external pull high resistor.
4
EN
Charge Enable Input (active low).
5
GND
GND is the connection to system ground.
6
TS
Temperature Senses Voltage Input. This pin senses the temperature of the battery pack
and stops the charger when the temperature is out of range. Connect to GND for
disabling this function.
7
ISET
Charge Current Program. The charge current is programmed by connecting a 1%
resistor(R
ISET
) to ground.
8
BAT
BAT is the connection to the battery. Typically a 10µF Tantalum capacitor is needed for
stability when there is no battery attached.
9
PAD
Exposed Pad,use to strengthen dissipation of heat.It usually connect to GND.