STC4054800mA Standalone linear Li-Ion battery charger with thermal regulation | Power Management (PMIC) | 1 | Active | The STC4054 is a constant current/constant voltage charger for single cell Li-Ion batteries. No external sense resistor or blocking diode is required and its ThinSOT package make it ideally suited for portable applications.
The STC4054 is designed to work within USB power specifications. An internal block regulates the current when the junction temperature increases, in order to protect the device when it operates in high power or high ambient temperature.
The charge voltage is fixed at 4.2V, and the charge current limitation can be programmed using a single resistor connectd between PROG pin and GND. The charge cycle is automatically terminated when the current flowing to the battery is 1/10 of the programmed value. If the external adaptor is removed, the STC4054 turns off and a 2µA current can flow from the battery to the device. The device can be put into Shutdown Mode, reducing the supply current to 25µA. The device also has a charge current monitor, under voltage lockout, automatic recharge. The device is packaged in TSOT23-5L. |
| Transistors | 1 | Obsolete | |
| FET, MOSFET Arrays | 1 | Obsolete | |
| Transistors | 1 | Obsolete | |
| Integrated Circuits (ICs) | 1 | Obsolete | |
| Power Management - Specialized | 1 | Obsolete | |
| Power Management - Specialized | 2 | Obsolete | |
STCC2540USB charging controller with integrated power switch | Power Distribution Switches, Load Drivers | 1 | Active | The STCC2540 device integrates, in one package, a USB charger controller, a wide bandwidth data switch, and a high current power switch. The device emulates several profiles compatible with the USB battery charging standard, BC1.2, Chinese telecommunications standard YD/T 1591-2009, and proprietary charger modes.
The device asserts the charging flag in DCP modes if the charging current is higher than the threshold. In CDP mode, it asserts the charging flag after the CDP negotiation if the charging current is higher than the threshold.
After the current drops below the threshold, the output is deasserted, allowing the host to turn off the high power DC-DC converter and reduce overall consumption in S4/S5 states, which is critical when the host is battery supplied. |
| Integrated Circuits (ICs) | 1 | Obsolete | |
| LED Drivers | 1 | Obsolete | |
