Details

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BUY LTC4079EDD#PBF https://www.utsource.net/itm/p/12532919.html

Parameter	Symbol	Conditions	Min	Typical	Max	Unit
Input Voltage Range	VIN	-	2.9	-	5.5	V
Battery Float Voltage	VFB	-	3.8	-	4.2	V
Charge Current	ICHG	-	0	-	500	mA
Shutdown Mode Supply Current	ISD	VIN = 5V	-	0.1	-	渭A
Operating Temperature Range	Toper	-	-40	-	85	掳C
Storage Temperature Range	Tstg	-	-65	-	150	掳C
Thermal Shutdown Temperature	TSD	-	160	-	-	掳C
Battery Reverse Blocking Voltage	VRB	-	-0.3	-	-	V
Battery Disconnect Threshold	VBAT_DIS	-	2.9	-	3.0	V
Battery Reconnect Threshold	VBAT_RECONN	-	2.7	-	2.8	V
Charge Termination Timer	TTERM	-	12	-	14	h

Instructions for Use:

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 2.9V to 5.5V.
   • The input voltage should be stable and free from excessive ripple or noise.

2. Battery Float Voltage (VFB):

   • Set the battery float voltage between 3.8V and 4.2V depending on the battery chemistry and requirements.
   • Use the VFB pin to set the desired float voltage.

3. Charge Current (ICHG):

   • The maximum charge current is 500mA.
   • Adjust the charge current by setting the appropriate resistor value on the ISET pin.

4. Shutdown Mode:

   • In shutdown mode, the supply current is reduced to 0.1渭A.
   • Enter shutdown mode by pulling the SHDN pin low.

5. Operating and Storage Temperature:

   • Operate the device within the temperature range of -40掳C to 85掳C.
   • Store the device within the temperature range of -65掳C to 150掳C.

6. Thermal Shutdown:

   • The device will automatically shut down if the temperature exceeds 160掳C to prevent damage.

7. Battery Reverse Blocking:

   • The device blocks reverse battery connection up to -0.3V to protect the circuit.

8. Battery Disconnect and Reconnect:

   • The battery disconnects when the voltage drops below 2.9V and reconnects when it rises above 2.8V.

9. Charge Termination Timer:

   • The charge termination timer is set to 12 to 14 hours to prevent overcharging.
   • The timer can be adjusted using external components.

Additional Notes:

• Always refer to the datasheet for detailed information and specific application circuits.
• Proper PCB layout and component selection are crucial for optimal performance.

(For reference only)