AHV85111 Isolated Gate Driver With Bipolar Output Power-Thru IC

June 4, 2024

Allegro MicroSystems' AHV85111 isolated gate-driver IC offers critical safety features and a simplified design for high-power energy conversion systems for e-mobility and clean energy applications.

Related To: Allegro MicroSystems

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Part of Allegro's High Voltage Power portfolio, the AHV85111 isolated gate-driver IC offers critical safety features with a simplified design of high-power energy conversion systems for e-Mobility and clean energy applications, including OBC/DCDC, solar inverter, and datacenter power supply.

The AHV85111 gate driver adds bipolar output that eliminates the need to design a complicated negative isolated DC power supply and removes unnecessary external components. It also protects against high operating temperatures in electric powertrain systems, as well as reactions to noisy environments that may be present in microinverters in solar applications, power supply in data center applications, or onboard chargers for electric vehicles.

It includes 10x lower common-mode capacitance, a 50% smaller footprint, 10x noise reduction, and a 50% efficiency improvement compared to competitor offerings, while also providing overtemperature protection.

Features:

Transformer isolation barrier
Power-Thru integrated isolated bias
- No need for a high-side bootstrap
- No need for external secondary-side bias
AEC-Q100 Grade 2 qualification
Bipolar drive output with adjustable regulated positive rail
Built-in primary-side 3.3V REF bias output
50ns propagation delay
Separate drive output pins: pull-up (2.8 Ω) and pull-down (1.0 Ω)
Supply voltage 10.8V<VDRV<13.2V
Undervoltage lockout on primary VDRV and secondary VSEC
Enable pin with fast response
Continuous ON capability—no need to recycle IN or recharge bootstrap capacitor
CMTI > 100 V/ns dv/dt immunity
Creepage distance 8.4 mm
Safety Regulatory Approvals
- 5 kV RMS VISO per UL 1577
- 8 kV pk VIOTM maximum transient isolation voltage
- 1 kV pk maximum working isolation voltage

Applications/Industries:

AC-DC and DC-DC converters: Totem-pole PFC, LLC half-/full-bridge, SR drive, multi-level converters, phase-shifted full-bridge
Automotive: EV chargers, OBC
Industrial: Data center, transportation, robotics, audio
Clean Energy: Micro-inverters, string-inverters, and solar inverters

Price: Unit price starts at $8

Distributor Options: Also available through DigiKey