IC manufacturers Renesas

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Renesas ISL6745

Voltage-Mode Double-Ended PWM Controller with Precision Dead-Time Adjustment

Overview

TopologyOther Topology
Switching frequency2000 kHz
IC revision6

Description

The ISL6745 is a low-cost double-ended voltage-mode PWM controller designed for half-bridge and full-bridge power supplies and line-regulated bus converters. It provides precise control of switching frequency, adjustable soft-start, and overcurrent shutdown. In addition, the ISL6745 allows for accurate adjustment of MOSFET nonoverlap time ("deadtime") with deadtimes as low as 35ns, allowing power engineers to optimize the efficiency of openloop bus converters. The ISL6745 also includes a control voltage input for closed-loop PWM and line voltage feedforward functions.

Low start-up and operating currents allow for easy biasing in both AC/DC and DC/DC applications. This advanced BiCMOS design also features adjustable switching frequency up to 1MHz, 1A FET drivers, and very low propagation delays for a fast response to overcurrent faults. The ISL6745 is available in a space-saving MSOP-10 package and is guaranteed to meet rated specifications over a wide -40°C to 105°C temperature range.

Features

  • Precision Duty Cycle and Deadtime Control
  • 100µA Start-up Current
  • Adjustable Delayed Overcurrent Shutdown and Re-Start
  • Adjustable Oscillator Frequency Up to 2MHz
  • 1A MOSFET Gate Drivers
  • Adjustable Soft-Start
  • Internal Over Temperature Protection
  • 35ns Control to Output Propagation Delay
  • Small Size and Minimal External Component Count
  • Input Undervoltage Protection
  • Pb-Free Available (RoHS Compliant)

Typical applications

  • AC/DC power supplies
  • Telecom, datacom, and file server power
  • Half-bridge converters
  • Line-regulated bus converters
  • Full-bridge converters

Products

Order Code Data­sheet Simu­lation Downloads Product seriesIR
(A)
L
(mH)
RDC max.
(mΩ)
VR
(V (AC))
VT
(V (AC))
MaterialL
(mm)
W
(mm)
H
(mm)
MountPinsRowsG
(mm)
GenderTypePackaging Samples
61300611821SPEC
6 files WR-PHD 2.54 mm Socket Header 3 15.74 THT 6 Single Socket Header Straight Tray
61300911821SPEC
6 files WR-PHD 2.54 mm Socket Header 3 23.36 THT 9 Single Socket Header Straight Tray
61301611821SPEC
6 files WR-PHD 2.54 mm Socket Header 3 41.14 THT 16 Single Socket Header Straight Tray
7448258022SPEC
10 files WE-CMB Common Mode Power Line Choke 8 2.2 14 250 1500 MnZn 30 21 35 THT 4 5
Order Code Data­sheet Simu­lation
61300611821SPEC
61300911821SPEC
61301611821SPEC
7448258022SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesIR
(A)
L
(mH)
RDC max.
(mΩ)
VR
(V (AC))
VT
(V (AC))
MaterialL
(mm)
W
(mm)
H
(mm)
MountPinsRowsG
(mm)
GenderTypePackaging Samples