STEVAL-ISA155V1：1 A constant current battery charger evaluation board based on the L6902D
The STEVAL-ISA155V1 product evaluation board integrates the L6902D step-down switching regulator with adjustable current limit, together with the external components required for a typical application.
The input voltage of the board can range from 8 V up to 25 V due to the rated voltage of the input capacitor and the Schottky rectifier repetitive peak reverse voltage (both 25 V). The external resistor divider (R1 and R2) sets the output voltage of the application board to 3.3 V. A different output voltage can be regulated from 1.235 V up to 10 V, the rated voltage of the output capacitor. A current limit of 1 A is programmed by the 100 mΩ sense resistor (Rsense).
The inductor saturation current and the forward current of the Schottky rectifier fit the current limit setting.
Key Features
- Up to 1 A output current
- Operating input voltage from 8 V to 25 V
- Precise 3.3 V (±2%) reference voltage
- 5% output current accuracy
- Output voltage adjustable from 1.235 V to 34 V
- 250 kHz internally fixed frequency
- Voltage feedforward
- Zero load current operation
- Adjustable current limit
- Protection against feedback disconnection
- Thermal shutdown
- RoHS compliant
Product Specifications
Board Manufacturing Specifications
Bill of Materials
Schematic Packs
License Agreement
Sample & Buy
| Part Number | Core Product | Unit Price (US$)
* | Quantity | ECCN (EU) | ECCN (US) | Country of Origin |
|---|
| STEVAL-ISA155V1 | L6902D | 36.75 | 1 | NEC | EAR99 | ITALY |
Quality & Reliability
| Part Number | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|
| STEVAL-ISA155V1 | CARD | Industrial | Ecopack2 | |
