| Part No.： | LTC4121-4.2 |
| Page： | 30 Pages |
| Size： | 451 KB |
| Manufacturer： | Linear Technology |
| Logo： |  |
| Views： | 1 |
| Update Time： | 2023-09-21 10:58:18 |
| DataSheet： | Download |
| Part No. | Packing | SPQ | Marking | MSL | Pins | Temp Range | Package Description | Buy |
| LTC4121EUD-4.2#PBF | Tube | 121 | LGMV | 1 | 16 | -40°C ~ 125°C | 16-Lead (3mm × 3mm) Plastic QFN | |
| LTC4121EUD-4.2#TRPBF | Reel | 2500 | LGMV | 1 | 16 | -40°C ~ 125°C | 16-Lead (3mm × 3mm) Plastic QFN | |
| LTC4121EUD-4.2#TRMPBF | Reel | 500 | LGMV | 1 | 16 | -40°C ~ 125°C | 16-Lead (3mm × 3mm) Plastic QFN | |
| LTC4121IUD-4.2#PBF | Tube | 121 | LGMV | 1 | 16 | -40°C ~ 125°C | 16-Lead (3mm × 3mm) Plastic QFN | |
| LTC4121IUD-4.2#TRPBF | Reel | 2500 | LGMV | 1 | 16 | -40°C ~ 125°C | 16-Lead (3mm × 3mm) Plastic QFN | |
| LTC4121IUD-4.2#TRMPBF | Reel | 500 | LGMV | 1 | 16 | -40°C ~ 125°C | 16-Lead (3mm × 3mm) Plastic QFN |
The LTC4121 is a 400mA constant-current/constantvoltage (CC/CV) synchronous step-down battery charger. In addition to CC/CV operation, the LTC4121 regulates its input voltage to a programmable percentage of the input open-circuit voltage. This technique maintains maximum power transfer with high impedance input sources such as solar panels.
An external resistor programs the charge current up to 400mA. The LTC4121-4.2 is suitable for charging Li-Ion/ Polymer batteries.
The LTC4121-4.2 include an accurate RUN pin threshold, low voltage battery preconditioning and bad battery fault detection, timer termination, auto-recharge, and NTC temperature qualified charging. The FAULT pin provides an indication of bad battery or temperature faults.
