TX4056C (stop production) TX4056C (Stop Production)
Overview of TX4056C
    TX4056C is a charger circuit that can charge a single rechargeable lithium battery at constant current/constant voltage. The device includes a power transistor inside, and external current-detecting resistors and choke diodes are not required for application. The TX4056C requires very few peripheral components and conforms to the USB bus technical specification, making it ideal for portable applications.
    The heat modulation circuit can control the chip temperature within the safe range when the power consumption of the device is relatively large or the ambient temperature is relatively high. The internal fixed constant voltage charging voltage is 4.2V, and the charging current is set through an external resistor. When the input voltage (AC adapter or USB power supply) is lost, the TX4056 automatically enters low-power sleep mode, at which time the battery current consumption is less than 0.1µA. Built-in anti-backfilling protection circuit, when the battery voltage is higher than the input voltage, automatically turn off the built-in power MOSFET. Other features include low input voltage latch, automatic recharging, built-in OVP protection and charge status/charge end status indicator.
    The TX4056C comes in a heat-enhanced 8-pin small form factor package, the eSOP-8.

TX4056C Features
Programmable charging current up to 1.0A
No external MOSFETs, sensing resistors, and choke diodes are required
The small size enables complete linear charge management of lithium-ion batteries
Constant current/voltage operation and heat regulation allow for maximum efficiency in battery management without the danger of overheat
Manage a single lithium-ion battery from a USB port
Charge current output monitoring
Charging status indicator and full status indicator
1/10 charge current terminated
Automatic recharging provides 40A current when it stops working
2.9V trickle charging threshold voltage
Soft start limits the surge current current
OVP protection function, input higher than 6.8V, stop charging
When the VIN is unplugged, the IC does not consume battery energy
The output end has the function of anti-backfilling protection
In eSOP8 and custom package form

TX4056C Uses
Mobile phone
Digital camera
MP4 player
Bluetooth application
Electronic dictionary
Portable equipment
Various chargers
Mobile power supply

TX4056C pin diagram

Typical application diagram of TX4056C

TX4056C functional block diagram