Datasheet Intersil ISL78420AVEZ — Даташит

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1-888-INTERSIL HIP2120, HIP2121 FN7668
Rev 0.00
December 23, 2011 100V, 2A Peak, High Frequency Half-Bridge Drivers with Adjustable Dead Time
Control and PWM Input
The HIP2120 and HIP2121 are 100V, high frequency, half-bridge
MOSFET driver ICs. They are based on the popular ISL2100A and
ISL2101A half-bridge drivers.
These drivers have a programmable dead-time to insure …

DATASHEET
ISL78420 FN8296
Rev 4.00
September 29, 2016 100V, 2A Peak, Half-Bridge Driver with Tri-Level PWM Input and Adjustable
Dead-Time
The ISL78420 is a 100V, 2A high frequency half-bridge NMOS
FET driver with a tri-level PWM input. With an operating supply
range of 8V to 14V and integrated high-side bootstrap bias, it
supports driving the high-side and low-side NMOS in 100V halfbridge applications.
This driver is designed to work in conjunction with the
ISL78220 and ISL78225 “Multi-Phase Interleaved Boost PWM
Controller” and the ISL78226 “6-Phase 12V/48V Bidirectional
Synchronous PWM Controller”. It can also be used in
applications where a standard half-bridge driver is needed. Features 114VDC bootstrap supply maximum voltage 2A source and sink driver for 100V half-bridge NMOS FETs Programmable dead-time prevents shoot-through;
adjustable from 35ns to 220ns with a single resistor Unique tri-level PWM input logic enables phase shedding
when using multiphase PWM controllers (e.g.
ISL78220/225/226) On-chip 1О© (dynamic) bootstrap diode This driver has a programmable dead-time to ensure
break-before-make operation between the high-side and lowside MOSFET. A resistor is used to set the dead-time from 35ns
to 220ns. 10ns rise and fall times with 1000pF load 8V to 14V operating voltage range VDD and Boostrap supply Undervoltage Lockout (UVLO) The PWM pin’s tri-level input allows control of the high-side
and low-side drivers with a single pin. When the PWM input is
at logic high, the high-side bridge FET is turned on and the lowside FET is off. When the input is at logic low, the low-side
bridge FET is turned on and the high-side FET is turned off.
When the input voltage is in mid-level state, both the high and …

DATASHEET
ISL78225 FN7909
Rev 4.00
September 5, 2014 4-Phase Interleaved Boost PWM Controller with Light Load Efficiency
Enhancement Features The ISL78225 4-phase controller is targeted for applications
where high efficiency (>95%) and high power are required. The
multiphase boost converter architecture uses interleaved
timing to multiply channel ripple frequency and reduce input
and output ripple. Lower ripple results in fewer input/output
capacitors and therefore lower component cost and smaller
implementation area. Peak current mode PWM control with adjustable slope
compensation Precision resistor/DCR current sensing 2-, 3-or 4-phase operation Adjustable phase dropping/diode emulation/pulse skipping
for high efficiency at light load The ISL78225 has a dedicated pin to initiate the phase
dropping scheme for higher efficiency at light load by dropping
phases based on the load current, so the switching and core
losses in the converter are reduced significantly. As the load
increases, the dropped phase(s) are added back to
accommodate heavy load transients and improve efficiency. Phase dropping facilitated with companion FET driver
ISL78420 (featuring tri-level input control) Adjustable switching frequency or external synchronization
from 75kHz up to 1MHz per phase Over-temperature/overvoltage protection Input current is sensed continuously by measuring the voltage
across a dedicated current sense resistor or inductor DCR. This
current sensing provides precision channel-current balancing,
and per-phase overcurrent protection. A separate totalizing …

DATASHEET
ISL78220 FN7688
Rev 4.00
September 2, 2014 6-Phase Interleaved Boost PWM Controller with Light Load Efficiency
Enhancement
The ISL78220 6-phase controller is targeted for applications
where high efficiency (>95%) and high power are required. The
multiphase boost converter architecture uses interleaved
timing to multiply channel ripple frequency and reduce input
and output ripple. Lower ripple results in fewer input/output
capacitors and therefore lower component cost and smaller
implementation area.
The ISL78220 has a dedicated pin to initiate the phase
dropping scheme for higher efficiency at light load by dropping
phases based on the load current, so the switching and core
losses in the converter are reduced significantly. As the load
increases, the dropped phase(s) are added back to
accommodate heavy load transients and improve efficiency.
Input current is sensed continuously by measuring the voltage
across a dedicated current sense resistor or by inductor DCR.
This current sensing provides precision channel-current
balancing, and per-phase overcurrent protection. A separate
totalizing current limit function provides overcurrent protection …