TSM101 is a linear battery charger for nickel-cadmium batteries. It can charge at 200mA or 60mA, depending on whether the charge control input is open or grounded.
The document presents an example of a linear battery charger utilizing the TSM101 integrated circuit. The design supports charging two different types of six-cell Nickel-cadmium batteries by regulating the charge current at either 200mA or 60mA, depending on the configuration of the charge control input.
The note details the calculation of circuit elements, including voltage limitation and current regulation formulas. It provides specific component values for the application board, such as resistors R6 (1.5kΩ), R7 (10kΩ), and R5 (120Ω). Additionally, it offers guidance on selecting power transistors, recommending a Darlington pair configuration to compensate for internal voltage drops.
| Battery Type | Six Cells Nickel-cadmium |
|---|---|
| Nominal Charge Current (Open Input) | 200mA |
| Regulated Charge Current (Grounded Input) | 60mA |
| End-of-Charge Voltage Limit | 1.45V/cell |
This charger is designed for a six-cell Nickel-cadmium battery.
The current is regulated at 200mA if the charge control input is left open, or 60mA if connected to ground.