smallembedded

1A constant current DC/DC converter evaluation board based on L6902D

STEVAL-ISA155V1

Overview

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.

Main 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

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2025-05-08 15:04:17

[Me and WEBENCH] Comparison of power supply solutions based on TMS320VC33DSP control board (physical comparison test)
[i=s] This post was last edited by fengye5340 on 2014-1-6 13:41 [/i] [align=left][size=4][color=Blue][b][font=仿宋,仿宋_GB2312][size=14.0pt]1. [Introduction to the original solution] [/size][/font][/b][/c
Which modules in Quartus occupy on-chip memory?
Which modules in quartus occupy on-chip memory? How can I see which IPs occupy how many M4K modules? Thank you.10485760 is 10Mbit. Is this the size of on-chip memory?The M4K of EP2C35 is 105 RAM, whic
How can I reset the MCU (registers need to be reset) via software (writing code) on LPC1788?
As the title says, I hope to send a command from the host computer to reset the MCU, reset all registers, and execute the program from 0x00000000
Methods to improve the flash erase and write life of MSP430G series microcontrollers
[color=rgb(82, 82, 82)][font=Arial, sans-serif][size=12px][b]Methods to Improve the Flash Erase Life of MSP430G Series MCUs[/b][/size][/font][/color] [color=rgb(82, 82, 82)][font=Arial, sans-serif][si
Intel82551 network card large packets (65535 bytes) cannot be transmitted
I am working on an MPC8377 board, which has an Intel82551 PCI network card and an Intel82574 pci-e network card on board. The version of vxworks is 6.6. I used command line to compile before, and the
MSP430 User Experience
I really started using 430 after I changed my job. The new project was implemented with 430 MCU, mainly because of the micro-power consumption function of 430. I really felt the power of this MCU. In

Datasheet More

Circuits More