TP4366

1A Synchronous mobile power solution

summary features
TP4366 is a synchronous boost single-chip solution designed for  Charge Input Voltage 6.5V Overvoltage
mobile power supply. It integrates a linear charge management Protection
module, a synchronous discharge management module, a power  Discharge output:5V/1A
detection and LED indication module, and a protection module.  recharging current: 0.8A
The TP4366 has a built-in charge and discharge power MOS.
 Discharge efficiency up to 93% at 1A output
The charge current is fixed at 0.8A. Synchronous boost supports
 BAT discharge termination voltage: 2.85V
1A output current.
 Optional 4.2V/4.35V charging voltage
TP4366 integrates multiple safety protection functions such as
 Intelligent temperature control and over-
temperature compensation, over-temperature protection, over-
temperature protection
charge and over-discharge protection, output over-voltage
 Integrated output overvoltage protection,
protection, output overload protection, and output short-circuit short circuit protection, overload protection
protection to ensure the safety of the chip and lithium-ion battery,  Integrated over-charge and over-discharge
protection
and the application circuit is simple. Only a few components are
 Supports trickle mode and zero voltage
needed to achieve charge management and discharge
charging
management.  Support flashlight output
 Package form：SOP8

Typical application circuit application

 mobile power

cccg 1
 TP4366
1A Synchronous mobile power solution

PIN

Pin description
Pin
number description
Pin name
1 OUT Boost output positive terminal and output voltage sampling terminal
2 BAT Lithium ion battery anode
3 SW Boost Power NMOS Drain
4 GND Chip ground
Connect the button and flashlight LED light, short press the button to display
5 SWT the power, long press the button 2S flashlight to open or close
6 VDD Power input
7 LED2 LED driver
8 LED1 LED driver

Limit parameters (Note 1)

parameter Rated value unit
All pins to GND -0.3~+7 V
Storage environment temperature -50~+150 ℃
Operating junction temperature
range -40~150 ℃
HBM 3000 V
MM 300 V

Recommended working area

symbol parameter Rated value unit
VDD Charging input voltage 4.5~5.5 V
TOP Working temperature -20~85 ℃

Note 1: The maximum limit is that the chip may be damaged beyond this working range. The recommended working range means that the chip works normally
in this range, but it does not guarantee to meet individual performance indicators. The electrical parameters define the DC and AC electrical parameter
specifications of the device within the operating range and under test conditions that guarantee specific performance specifications. For unspecified upper and
lower limit parameters, the specification does not guarantee its accuracy, but its typical value reasonably reflects the device performance.

cccg 2
 TP4366
1A Synchronous mobile power solution

Electrical parameters
Unless otherwise specified, VDD=5V, Ta=25°C
Typical
symbol parameter Test Conditions Min value Max Unit

VDD Charging input voltage 4.3 5 5.5 V

Charge input
VDD_OVP overvoltage protection 6.5 V
Charge input
overvoltage protection
VDD_OVP_RE recovery 5.8 V
For 4.2V specifications 4.15 4.2 4.25 V
VBAT Preset charging voltage
For 4.35V specifications 4.30 4.35 4.4 V
BAT constant current
IBAT charging current Constant current charging mode 0.8 A
BAT Trickle charge
ITRK current Trickle charge mode 100 mA
Trickle Charge
VTRK Threshold Voltage VBAT raise 2.9 V
Trickle charge
VTRK_HYS hysteresis voltage 150 mV
Charging temperature
TST compensation threshold 120 ℃
Charge zero current
TZERO temperature 135 ℃

VUV_BAT BAT Under Voltage 3.2 V

Lockout Threshold VBAT raise
Voltage

BAT low voltage alarm

VWN_BAT voltage VBAT drop 3.0 V
BAT discharge
VBAT_END termination voltage 2.85 V
ISD_BAT BAT standby current VBAT=3.7V 50 80 uA
VDD raise 180 mV
VDD-VBAT lock
VSD threshold
VDD drop 80 mV
VOUT Boost output voltage ILOAD=1A,VBAT=3.7V 4.8 5V 5.2 V
ILEDx LEDx drive current BAT=4V 2 mA
LEDx charging flash
FLEDx_C frequency 1 Hz
LED1 low alarm
FLED1_WN frequency 2 Hz
Charge PMOS On
RON_CHRG Resistance 300 mΩ
Discharge NMOS On-
RON_NMOS resistance 65 mΩ
Discharge PMOS On-
RON_PMOS resistance 65 mΩ
Boost circuit operating
FOSC frequency 0.7 1 1.3 MHz

cccg 3
 TP4366
1A Synchronous mobile power solution

Application note
Low battery protection
Constant temperature mode At startup, when the BAT voltage is greater than 3.2V,
the boost circuit starts to work. If the battery voltage is
The TP4366 integrates a temperature feedback loop. When lower than 3.0V during operation, LED1 will flash fast at
the internal temperature of the chip rises to 120°C 2HZ to remind the battery to be low. When the battery
(approximately 80°C on the surface), the charge or discharge voltage is lower than 2.85V, then The discharge output
turns off and the TP4366 enters low-current standby
current decreases as the temperature of the chip increases. mode.
This reduces system power consumption. , Reduce the
temperature rise, due to the temperature feedback control, the Charge input overvoltage protection
IC will enter the constant temperature mode without fear of If the input voltage VDD is greater than 6.5V during
damaging the IC or forcing the IC off when the temperature is charging, the TP4366 will turn off the charging circuit to
too high. protect the chip as much as possible, and resume
normal charging when VDD drops below 5.8V.
Charging mode
If the lithium ion battery voltage is lower than 2.9V before Component selection
charging, in order to protect the battery, the TP4366 operates 1、The power indicator light D1, D2, D3, D4 need to
in trickle charge mode, and the charging current is 100mA. have a voltage drop greater than 2.8V, and the error is
less than 0.2V.
After the battery voltage reaches 2.9V, the TP4366 enters the 2、When the voltage of the flashlight is lower than 1.5V,
constant current charging mode, and the charging current is the leakage current shall be less than 1uA, otherwise
0.8. A; When the battery voltage reaches 4.2V, the TP4366 the BAT must be added to the SWT pull-up resistor
operates in the constant voltage charging mode. At this time, 100K;
3、The output capacitor C1 selects the low ESR chip
the BAT voltage is constant and the charging current is
capacitor with good quality, otherwise it will affect the
gradually reduced. When the charging current is reduced to
output ripple;
100mA, the charging process ends and the charging current is
4、The saturation current of inductor L1 needs to be
reduced to zero.
greater than 3A. Otherwise, the saturation of the
inductor may cause the chip to operate abnormally.
Load detection and low-power smart
standby PCB design reference
When the load is inserted, the TP4366 can
automatically detect the load and turn on the boost 1、The grounding area should be as large as possible,
circuit. When the load is removed, the boost circuit and other unimportant lines can be bypassed to meet
closes after an 18S delay, and the IC enters a low- the needs of the ground.
current standby mode.
2、It is recommended that 10uF be placed next to the
inductor and 1uF should be placed close to the BAT pin
Discharge indication of the chip. If only one BAT capacitor is placed, it must
During discharge, LED1~LED4 indicate the current power
be ensured that the capacitor is located close to the chip
according to the battery voltage. When the battery voltage is
and close to the inductor. The ground line of the
lower than 3.0V, LED1 will flash at 2HZ frequency for low
capacitor should be connected to a large area ground
power alarm.
line as much as possible. Small ground to chip and large
area；
Flashlight output 3、The output capacitor C1 should be as close to the
The SWT can drive the LED light for flashlight illumination. chip as possible, and its ground line should be
The maximum drive current is 50mA. The series resistance connected to a large area ground line as much as
of the LED can be used to reduce the current of the indicator
possible. Do not go through the small ground line to the
flashlight. SWT is also the key switch foot. If you press the
chip and a large area.
S1 key for 2 seconds, the flashlight will turn on again. Press
4、The inductor needs to be close to the BAT capacitor.
S1 key 2S flashlight output off.。
The inductor and the BAT capacitor C2 and the chip
should be in the same layer as far as possible without
passing through the hole. The trace from the inductor to
the SW should be as short and thick as possible.
cccg 4
 TP4366
1A Synchronous mobile power solution

Protective function
TP4366 integrates multiple protection mechanisms, such as overcharge protection, over discharge protection, charge
temperature compensation, over-temperature protection, output over-voltage protection, output overload protection, and
output short-circuit protection, etc. It is also possible to additionally add a DW01 to double protect the system.

Working status and battery indication

LED1~LED4 are charge/discharge status and power indication pins. When the status is different, the LED status is as
follows：
①When VDD is connected, LED1 to LED4 will all turn on, and then indicate the state of charge according to the battery
level, reaching the LED constant of the battery. The LED of the current battery flashes at the frequency of 1Hz, and
LED1 to LED4 are all on after the power is fully charged.
②In standby mode, click button S1 to display 18S power and turn it off;
③During discharge, LED1~LED4 indicate the current power according to the battery voltage; if the battery voltage is
lower than 3.0V, LED1 will flash rapidly at a frequency of 2HZ to indicate that the power is low until the battery voltage
is lower than 2.85V. Turn off the circuit and enter low-power low-voltage protection. Mode, need to recharge to above
3.2V to discharge again;
④Press and hold the S1 key for 2 seconds, turn the flashlight on, and press and hold the S1 key again. 2S Turn off the
flashlight.。

LED1 ~ LED4 working status table

Char Discha
ging rging

IC model
battery voltage (V) LED1 LED2 LED3 LED4 battery voltage (V) LED1 LED2 LED3 LED4

VBAT＜2.85 off off off off

VBAT＜3.6 Blinking off off off 2.85≤VBAT＜3.0 Fast flash off off off

3.0≤VBAT＜3.5 on off off off

TP4366 3.6≤VBAT＜3.75 on Blinking off off 3.5≤VBAT＜3.65 on on off off

3.75≤VBAT＜4.0 on on Blinking off 3.65≤VBAT＜3.9 on on on off

4.0≤VBAT＜4.2 on on on Blinking 3.9≤VBAT on on on on

-
4.2≤ VBAT on on on on - - - -

cccg 5
 TP4366
1A Synchronous mobile power solution

Package size
SOP8L

毫米
符号
最小值 标准值 最大值
A 1.35 1.60 1.77
A1 0.08 0.15 0.28
A2 1.20 1.40 1.65
b 0.33 - 0.51
c 0.17 - 0.26
D 4.70 4.90 5.10
E 5.80 6.00 6.20
E1 3.70 3.90 4.10
e 1.27BSC.
L 0.38 0.60 1.27
 0 - 8

Note: The company has the right to modify this document. The company will not modify this document
without notice.

cccg 6