Radiation Tolerant Single-Ended Current Mode PWM Controller
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Overview
Description
The ISL71043M is a PWM controller suitable for a wide range of power conversion applications including boost, flyback, and isolated output configurations. Its fast signal propagation and output switching characteristics make this an ideal product for existing and new designs. Features include up to 13. 2V operation, 2. 9mA operating current, 90μA typical start-up current, adjustable operating frequency to 1MHz and, 1A current drive capability with 35ns rise and 29ns fall times. The ISL71043M is offered in either an 8 Ld SOIC or an 8 Ld TDFN package and both are specified across the extended temperature range of -55°C to +125°C.
Features
- 1A MOSFET gate driver
- 90µA typical start-up current, 125µA maximum
- Moisture Sensitivity Level (MSL) rating is 1
- 35ns propagation delay current sense to output
- Fast transient response with Peak Current mode control
- 9V to 13.2V operatio; Rising UVLO: 8.4V
- Maximum duty cycle: 100%
- Adjustable switching frequency to 1MHz
- 35ns rise time and 29ns fall time with 1nF output load
- Trimmed timing capacitor discharge current for accurate dead time/maximum duty cycle control
- 1.5MHz bandwidth error amplifier
- Tight tolerance voltage reference over line, load, and temperature
- ±3% current limit threshold
- Ni/Pd/Au-Ag lead finish (Tin (Sn) free)
- Characterized radiation levels
- Low Dose Rate (LDR) (0.01rad(Si)/s): 30krad(Si)
- Single event burnout LET 43MeV•cm2/mg
Applications
- Current mode switching power supplies
- Isolated buck and flyback regulators
- Boost regulators
- Direction and speed control in motors
- Control of high current FET drivers
Design & Development
Boards & Kits
Boards & Kits
Radiation Tolerant Single-Ended Current Mode PWM Controller Evaluation Board
The ISL71043MEVAL1Z evaluation platform is designed to evaluate the ISL71043M and ISL71040M in a flyback power supply configuration.
The ISL71043M is a radiation-hardened drop-in replacement for the popular 28C4x and 18C4x PWM controllers suitable for a wide range of power conversion applications including boost, flyback and isolated output configurations. The ISL71043MEVAL1Z evaluation board is a flyback power supply.
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