LP4069PT-01 Oct.-2022 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 9
Preliminary Datasheet LP4069PT
1A Single Chip Li-Ion and Li-Polymer Charger
General Description
The LP4069PT 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 LP4069PT 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.
Order Information
LP4069PT
F: Pb-Free
Package Type
QV: TDFN-8
Battery Voltage
Default: 4.2V
44: 4.4V
Features
◆ Input Over Voltage Protection：6.3V
◆ Short-circuit protection
◆ Programmable Charge Current up to 1A
◆ 1µA Battery Reverse Current
◆ Protection of Reverse Connection of Battery
◆ No MOSFET, Sense Resistor or Blocking Diode
Required
◆ 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
LP4069PTQVF
LP4069
PTYWX
TDFN-8
4K/REEL
LP4069PTQVF-44
LP4069
PT44YW
TDFN-8
4K/REEL
Marking indication:
Y:Production year W:Production week
LP4069PT-01 Oct.-2022 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 2 of 9
Preliminary Datasheet LP4069PT
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
PG
CHRG
EN
Pin Description
No.
NAME
DESCRIPTION
1
IN
IN is the input power source. Connect to a wall adapter.
2
PG
Open-Drain Status Output. Low indicates the input voltage is above the input UVLO
voltage and the OUT (battery)+150mV voltage, and lower than OVP threshold.
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.