Overview

Description

The ISL78229 is an automotive grade (AEC-Q100 Grade 1), 2-phase 55V synchronous boost controller that simplifies the design of high power boost applications. It integrates strong half-bridge drivers, an analog/digital tracking input, comprehensive protection functions, and a PMBus interface for added control and telemetry. The ISL78229 enables a simple, modular design for systems requiring power and thermal scalability. It offers peak-current mode control for fast line response and simple compensation. Its synchronous 2-phase architecture enables it to support higher current while reducing the size of input and output capacitors. The integrated drivers feature programmable adaptive dead time control offering flexibility in power stage design. The ISL78229 offers a 90° output clock and supports 1-, 2-, and 4-phases. The ISL78229 offers a highly robust solution for the most demanding environments. Its unique soft-start control prevents large negative current even in extreme cases, such as a restart under high output prebias on high volume capacitances. It also offers two levels of cycle-by-cycle OCP, average current limiting, input OVP, output UVP/OVP, and internal OTP. A thermistor input is provided for external OTP for the power-stage elements. In the event of a fault, the ISL78229 offers individually programmable latch-off or hiccup recovery for each fault type. Also integrated are several functions that ease system design. A unique tracking input controls the output voltage, allowing it to track either a digital duty cycle (PWM) signal or an analog reference. The ISL78229 provides input average current limiting so the system can deliver transient bursts of high load current while limiting the average current to avoid overheating. The ISL78229 PMBus interface provides fault reporting, telemetry, and system control to support functional safety qualification.

Features

  • Input/output voltage range: 5V to 55V, withstands 60V transients
  • Supports synchronous or standard boost topology
  • Peak current mode control with adjustable slope compensation
  • Secondary average current control loop
  • Integrated 5V 2A sourcing/3A sinking N-channel MOSFET drivers
  • Switching frequency: 50kHz to 1.1MHz per phase
  • External synchronization
  • Programmable minimum duty cycle
  • Programmable adaptive dead time control
  • Optional diode emulation and phase dropping
  • PWM and analog track function
  • Forced PWM operation with negative current limiting and protection
  • Comprehensive protection/fault reporting
  • Selectable hiccup or latch-off fault response
  • I2C/PMBus compatible digital interface
  • AEC-Q100 qualified, Grade 1: -40°C to +125°C
  • 6mm x 6mm 40 Ld WFQFN (Wettable Flank QFN) package

Documentation

Title Type Date
PDF3.29 MB
Datasheet
PDF509 KB
Application Note
PDF397 KB
Application Note
PDF4.68 MB
Guide
PDF714 KB
Guide
PDF393 KB
Guide
PDF257 KB
Manual - Development Tools
PDF2.64 MB
Manual - Development Tools
PDF434 KB
White Paper

Design & Development

Software & Tools

Software & Tools

iSim:PE Offline Simulation TooliSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs.Downloads: Simulator Renesas
PowerNavigator SoftwareRenesas' PowerNavigator™ software allows simple configuration and monitoring of multiple Digital-DC devices using a PC with a USB interface.Downloads: Software Package Renesas

Software Downloads

Title Type Date
ZIP1.70 MB
PCB Design Files
ZIP120.25 MB
Software & Tools - Other
ZIP96.49 MB
Software & Tools - Software

Boards & Kits

Boards & Kits

Models

Models

Title Type Date
Model - iSim

Support