The ISL81401 and ISL81401A are 4-switch synchronous buck-boost controller with peak and average current sensing and monitoring at both ends. The ISL81401 is a bidirectional device that can conduct current in both directions while the ISL81401A is an unidirectional device. The ISL81401 and ISL81401A use the proprietary buck-boost control algorithm with valley current modulation for Boost mode and peak current modulation for Buck mode control. The ISL81401 and ISL81401A have four independent control loops for input and output voltages and currents. Inherent peak current sensing at both ends and cycle-by-cycle current limit of this family of products ensures high operational reliability by providing instant current limit in fast transient conditions at either ends and in both directions. It also has two current monitoring pins at both input and output to facilitate Constant Current (CC) limit and other system management functions. CC operation down to low voltages avoids any runaway condition at over load or short-circuit conditions. In addition to multilayer overcurrent protection, it also provides full protection features such as OVP, UVP, OTP, and average and peak current limit on both input and output to ensure high reliability in both unidirectional and bidirectional operation. The IC is packaged in a space conscious 32 Ld 5mmx5mm QFN package to improve thermal dissipation and noise immunity. The unique DE/Burst mode at light-load dramatically lowers standby power consumption with consistent output ripple over different load levels.

特長

  • Single inductor 4-switch buck-boost controller
  • On-the-fly bidirectional operation with independent control of voltage and current on both ends
  • Proprietary algorithm for smoothest mode transition
  • MOSFET drivers with adaptive shoot-through protection
  • Wide input voltage range: 4.5V to 40V
  • Wide output voltage range: 0.8V to 40V
  • Supports pre-biased output with SR soft-start
  • Programmable frequency: 100kHz to 600kHz
  • Supports parallel operation current sharing with cascade phase interleaving
  • External sync with clock out or frequency dithering
  • External bias for higher efficiency supports 5V - 36V input
  • Output and input current monitor
  • Selectable PWM mode operation between PWM/DE/Burst modes
  • Accurate EN/UVLO and PGOOD indicator
  • Low shutdown current: 2.7µA
  • Complete protection: OCP, SCP, OVP, OTP, and UVP
    • Dual-level OCP protection with average current and pulse-by-pulse peak current limit
    • Selectable OCP response with either hiccup or constant current mode
    • Negative pulse-by-pulse peak current limit

tune製品選択

製品名 Part Status Pkg. Type Carrier Type MOQ 購入/サンプル
Active QFN Tube 60
Availability
Active QFN Reel 6000
Availability
Active QFN Reel 250
Availability

descriptionドキュメント

タイトル language 分類 形式 サイズ 日付
データシート
star ISL81401, ISL81401A Datasheet データシート PDF 2.11 MB
ユーザーガイド、マニュアル
ISL81401EVAL1Z User Guide マニュアル-開発ツール PDF 1.50 MB
アプリケーションノート、ホワイトペーパー
双方向DC/DCコンバータの動作とその応用 English, 简体中文 ホワイトペーパー PDF 659 KB
真のバックブースト・コントローラを使うことで、堅牢なバッテリ・バックアップ・システムで最大効率99%が達成可能です English, 简体中文 ホワイトペーパー PDF 782 KB
AN1681: Grounding Techniques アプリケーションノート PDF 509 KB
AN1684: Nonideality of Ground アプリケーションノート PDF 397 KB

file_downloadダウンロード

タイトル language 分類 形式 サイズ 日付
Hardware
ISL81401EVAL1Z Design Files PCB設計ファイル ZIP 1.05 MB

memoryボード&キット

製品名 タイトル 分類 会社名
ISL81401EVAL1Z 40V 同期昇降圧コントローラ評価ボード Evaluation Renesas