Compact high-reliability 16-channel low-side driver designed to meet the rigorous demands of avionic and defence applications.
Holt Integrated Circuits recently announced the introduction of the HI-84216, a smart 16-channel low-side driver designed for high-reliability avionics applications. The device uses a Serial Peripheral Interface (SPI) for intelligent switch control, monitoring and advanced diagnostics. The HI-84216 is capable of sinking 250mA per channel with up to 4A total sink current for parallel channel operation.
The HI-84216 includes numerous protection features such as a thermal fail-safe mechanism and overcurrent shutdown on a per-channel basis with flexible retry options. The device measures the global die temperature and output current of each channel using an integrated 8-bit A/D converter.
Both high and low current threshold limits may be programmed for over-current and open load detection, respectively, and both hardware and software interrupts can be enabled on a per-channel basis to allow monitoring of individual load-current status.
Holt HI-84216 Key Features
- Compact 16-channel low-side driver (6mm x 6mm)
- 250mA sink current per channel
- Sink up to 4A when all channels used in parallel
- Accurate current/temperature measurement
- Access diagnostics and program via 10 MHz SPI
- 0.5 Ω On-Resistance per channel
- < 1μA leakage current with low quiescent power
- Digital I/O powered with 1.8V to 5.0V
- Continuous Online Built-in Self-Test
- Host-controlled output enable pin
- Operating Temperature: -40°C to +85°C or -55°C to +125°C
The integrated 8-bit A/D converter provides accurate measurement of channel current and temperature, which are stored in registers as 8-bit binary words and may be read via host-initiated SPI opcodes. A fully programmable internal PWM clock generator can operate on a per-channel basis across a frequency range of 24 Hz to 48 kHz, with 16-bit resolution pulse width and period.
“This highly flexible device enables customers to simultaneously drive a multitude of loads, such as LEDs, lamps, solenoids and relays ….. The device’s protection features and Holt’s pedigree provide customers with confidence in selecting it over standard commercial products for high-reliability avionics applications.”
Anthony Murray | Director of Marketing Communications at Holt Integrated Circuits
The HI-84216 is available in a compact 6mm x 6mm, 48-pin plastic QFN package and comes in industrial (−40°C to +85°C) and extended (−55°C to +125°C) temperature ranges with optional burn-in at the higher temperature.
Further technical information can be requested by speaking to our high-reliability components team member. Holt draws from a long history and technical expertise in military and aerospace quality and high reliability.
New Holt ADK-84216 Development Kit for Hi-884216 Programmable 16-Channel Low-Side Driver
The new ADK-84216 is a development kit designed to demonstrate the features of Holt’s recently announced programmable 16-channel low-side driver, HI-84216.
The kit consists of a 2-board assembly, comprising a lower MCU board with ARM Cortex M3 16-/32-bit microprocessor and debug interface, and an upper HI-84216 daughtercard to demonstrate the key features of the device.
The project source code is included and easily customised to provide a starting point for customer application software development, shortening design cycles, reducing risk and decreasing time to market.
Holt ADK-84216 Development Kit Key Features
- Serial Peripheral Interface (SPI) for intelligent switch control, monitoring and advanced diagnostics
- 250mA per channel sinking capability
- 4A total sink current for parallel channel operation
- 8-bit ADC provides accurate measurement of channel current and temperature
- Internal PWM clock generator with 16-bit resolution
- External PWM clock option. PWM waveform generation
Available With Expert Insight and Support From A Leading
UK Holt Integrated Circuits Technical Distributor
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