Description:The ISL78424, ISL78434, and ISL78444 are Automotive Grade (AEC-Q100 Grade 1) high voltage, high frequency, half-bridge NMOS FET drivers for driving the gates of up to 70V half-bridge topologies. The family of half-bridge drivers feature 3A sourcing, 4A sinking peak gate drive current. The ISL78424 and ISL78444 feature a single tri-level PWM input for controlling both gate drivers. The ISL78434 has dual independent inputs for controlling the high-side and low-side driver separately. The ISL78424 and ISL78434
SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Cel):
260
Screening Level:
AEC-Q100
Seated Height-Max:
1.2 mm
Supply Current-Max:
11.9 mA
Supply Voltage-Max:
18 V
Supply Voltage-Min:
8 V
Supply Voltage-Nom:
12 V
Surface Mount:
YES
Terminal Finish:
Matte Tin (Sn) - annealed
Terminal Form:
GULL WING
Terminal Pitch:
0.65 mm
Terminal Position:
DUAL
Time@Peak Reflow Temperature-Max (s):
30
Turn-off Time:
0.08 µs
Turn-on Time:
0.06 µs
Width:
4.4 mm
ISL78424AVEZ Frequently Asked Questions (FAQs)
Renesas provides a recommended PCB layout guide in their application note AN1995, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure optimal performance.
The selection of input and output capacitors depends on the specific requirements of your application, such as ripple current, voltage rating, and ESR. Renesas recommends using X5R or X7R ceramic capacitors with a voltage rating of at least 1.5 times the maximum input voltage. For more information, refer to the capacitor selection guide in the ISL78424AVEZ datasheet.
While the datasheet specifies an operating temperature range of -40°C to 125°C, the maximum ambient temperature for reliable operation depends on the specific application and cooling conditions. As a general guideline, Renesas recommends keeping the ambient temperature below 85°C for optimal reliability and performance.
To ensure EMC in your design, follow Renesas' guidelines for PCB layout, component selection, and shielding. Additionally, consider using a common-mode choke and EMI filters to reduce electromagnetic interference. Renesas also provides an EMC design guide in their application note AN1996.
Renesas recommends a soft-start sequence to prevent inrush currents and ensure reliable startup. The recommended sequence is: 1) Apply input voltage, 2) Wait for the internal voltage regulator to stabilize, and 3) Enable the output voltage. For more information, refer to the startup sequence guidelines in the ISL78424AVEZ datasheet.
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ISL78424AVEZ Overview
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