Overview

Description

The smart terminal backup power system has a wide input voltage range which supports from 4.5V to 40V with 1A to 20A output. A supercapacitor can be used to replace the traditional battery (with defects such as electrolyte leakage) as a backup power supply.

In this solution, the buck-boost controller can work in buck, boost or buck-boost mode with bidirectional CC/CV mode support, and can replace two-part solutions available from competitors. The charge time can be programmed as needed, and the discharge time can be optimized to fully discharge the energy. ISL81401 can discharge the capacitor energy as much as the present electronic components, which maximizes the use of capacitive energy and helps save cost. 

System Benefits:

  • ISL81401 can fully extract the power of supercapacitor (can be as low as 0.3V)
  • ISL88002 voltage supervisor to monitor the power status
  • RJK03M5DNS N-MOSFET support for high-efficiency drive and low heat design

Comparison

Applications

Winning Combinations Interactive Diagram

Select a block to discover products for your design

4:3 ratio MOSFET 3 MOSFET MOSFET MOSFET 4 MOSFET MOSFET MOSFET 1 MOSFET MOSFET MOSFET 2 MOSFET MOSFET Sheet.1 Sheet.2 Sheet.3 Sheet.4 CN300 CN300 CN300 Diode -Schottky.92 Sheet.93 Sheet.94 Sheet.95 Sheet.96 Sheet.97 Sheet.98 Sheet.99 Input Capacitor Non-polarized .102 Sheet.104 Sheet.105 Sheet.106 Transformer Inductor Iron Core.107 Line.841 Inductor Air Core.212 Sheet.110 Sheet.111 Sheet.112 Sheet.113 Sheet.114 Sheet.115 Sheet.116 Sheet.117 Sheet.118 Line.29 Diode -Schottky.120 Sheet.121 Sheet.122 Sheet.123 Sheet.124 Sheet.125 Sheet.126 Sheet.127 Resistor - Fixed.97 SuperCap (0-40V) SuperCap (0-40V) SuperCap (0-40V) Connector 1.166 Sheet.192 Vin (5V-40V) Vin (5V-40V) Vin (5V-40V) Resistor - Fixed.111 Ground (earth).112 Sheet.206 Sheet.207 Sheet.208 Sheet.209 Resistor - Fixed.117 Sheet.225 Sheet.226 Sheet.228 Connector 1.226 Ground (earth).260 Sheet.261 Sheet.262 Sheet.263 Sheet.264 N-Channel MOSFET.238 Sheet.239 Sheet.240 Sheet.241 Sheet.242 Sheet.243 Sheet.244 Sheet.245 Sheet.246 Sheet.247 Sheet.248 Sheet.249 Sheet.250 Sheet.251 Sheet.252 Connect.50 Sheet.254 Sheet.255 Sheet.256 Sheet.71 Capacitor Non-polarized Sheet.332 Sheet.333 Sheet.334 Sheet.335 Sheet.336 Ground (earth).337 Sheet.338 Sheet.339 Sheet.340 Sheet.341 SuperCap SuperCap SuperCap Connector 1.169 Sheet.350 Connector 1.169.351 N-Channel MOSFET.238 Sheet.290 Sheet.291 Sheet.292 Sheet.293 Sheet.294 Sheet.295 Sheet.296 Sheet.297 Sheet.298 Sheet.299 Sheet.300 Sheet.301 Sheet.302 Sheet.303 Connect.50 Sheet.305 Sheet.306 Sheet.307 N-Channel MOSFET.356 Sheet.357 Sheet.358 Sheet.359 Sheet.360 Sheet.361 Sheet.362 Sheet.363 Sheet.364 Sheet.365 Sheet.366 Sheet.367 Sheet.368 Sheet.369 Sheet.370 Connect.50 Sheet.372 Sheet.373 Sheet.374 Sheet.375 Connector 1.169.376 Ground (earth).377 Sheet.378 Sheet.379 Sheet.380 Sheet.381 Sheet.382 Connector 1.169.383 Sheet.384 Sheet.385 Sheet.386 Sheet.387 Sheet.388 Sheet.389 Sheet.391 Sheet.392 Sheet.393 Connector 1.169.394 Sheet.395 Capacitor Non-polarized .396 Sheet.397 Sheet.398 Sheet.399 Ground (earth).400 Sheet.401 Sheet.402 Sheet.403 Sheet.404 Connector 1.405 Resistor - Fixed.407 Ground (earth).408 Sheet.409 Sheet.410 Sheet.411 Sheet.412 Resistor - Fixed.413 Sheet.414 Sheet.415 Connector 1.416 Sheet.418 Sheet.419 Connector 1.420 Sheet.421 Sheet.422 Sheet.423 Sheet.424 Sheet.425 Sheet.426 Sheet.427 Sheet.430 To MCU ACK To MCU ACK To MCU ACK Sheet.432 Resistor - Fixed.140 Resistor - Fixed.141 Sheet.153 Connector 1.194 Ground (earth).199 Sheet.200 Sheet.201 Sheet.202 Sheet.203 Sheet.433 Connector 1.169.434 Vout to Load Vout to Load Vout to Load VCC VCC VCC Connector 1.169.437 Sheet.439 Sheet.440 Buck-Boost Controller Buck-Boost Controller Buck-Boost Controller GATE GATE GATE FBout FBout FBout VCC VCC VCC VIN VIN VIN FBin FBin FBin Sheet.441 Voltage Supervisor Voltage Supervisor Voltage Supervisor VDD VDD VDD RST RST RST N-Channel MOSFET.268 Sheet.269 Sheet.270 Sheet.271 Sheet.272 Sheet.273 Sheet.274 Sheet.275 Sheet.276 Sheet.277 Sheet.278 Sheet.279 Sheet.280 Sheet.281 Sheet.282 Connect.50 Sheet.284 Sheet.285 Sheet.286
Exiting Interactive Block Diagram