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
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