Overview
Description
The ISL8104EVAL1Z evaluation board highlights the operations of the ISL8104 controller in a DC/DC application. The ISL8104 is a simple single-phase pulse width modulator (PWM) controller for a synchronous buck converter with integrated MOSFET driver that operates from +8V to +14.4V bias supply voltage. The ISL8104 employs voltage-mode control with dual-edge modulation to achieve fast transient response. The controller features the ability to safely start-up into pre-biased output loads and provides protection against overcurrent fault events. Overcurrent protection is implemented using top-side MOSFET rDS(ON) sensing, eliminating the need for a current sensing resistor.
Features
- +8V ±5% to +14V ±10% bias voltage range
- 1.5V to 15.4V input voltage range
- 0.597V internal reference voltage
- ±1.0% over the commercial temperature range
- ±1.5% over the industrial temperature range
- Voltage-mode PWM control with dual-edge modulation
- 14V high-speed N-channel MOSFET gate drivers
- 2.0A source/3A sink at 14V bottom-side gate drive
- 1.25A source/2A sink at 14V top-side gate drive
- Fast transient response
- 15MHz (typ.) gain-bandwidth error amplifier with 6V/µs slew rate
- Full 0% to 100% duty cycle support
- Programmable operating frequency from 50kHz to 1.5MHz
- Lossless programmable overcurrent protection
- Top-side MOSFET's rDS(ON) sensing
- ~120ns blanking time
- Sourcing and sinking current capability
- Support for start-up into pre-biased loads
Applications
Design & Development
Software & Tools
Software Downloads
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
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