Germany's Elmos has announced a series of solutions based on the E522.90/91/92/93 series of chips for automotive taillight LED drivers. Each channel of the E522.9x series has an output current range of 14mA to 55mA. When connected in parallel, the maximum output of a single chip is 165mA. This patented power management chip ensures constant LED even under harsh heat dissipation conditions. Flow characteristics. This scheme can be used to allocate the power consumption through the design of the external sampling resistor, and distribute the power proportionally to the external device and the PCB to avoid local hot spots on the board. In this unique solution, part of the power consumption is dissipated by the chip itself, and the other part is dissipated by the external device, which reduces the temperature rise of the chip itself and brings more design margins to the customer.
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This series of chips is also designed with a variety of fault diagnosis functions, which can detect the open/short state of the LED driver, IR configuration open/short current, built-in temperature sensor, temperature derating, and over temperature shutdown protection. In addition, the chip also Overvoltage conditions can be detected to achieve overvoltage protection to ensure reliable system operation.
The chip enables PWM dimming of the entire and individual channels. The “RUN†diagnostic interface supports more than three sets of LED cascading modes to achieve high current and multiple functional effects (such as dynamic flow effects) by cascading multiple chips.
The chip family and E522.80-83 chip pins and functions from 48mA to 151mA are fully compatible, allowing direct replacement and cascading to achieve multiple functions.
These chips offer two configurable fault handling modes of operation: one is the “fault feedback mode†(when an error is identified, the failed channel is turned off and a single fault signal is signaled), and the other is “single-light mode†"All connected LED phases are treated as a single connected source. When an error occurs, all channels are turned off, in which case the chip draws only a low standby current from the power supply - so that the power supply control unit can clearly and clearly detect the fault.
feature:
• Three independent high-side constant current sources (3 × 55mA);
• The full output of each channel;
• Parallel output mode up to 165mA;
• Low power standby/sleep mode;
• Each channel has thermal management capabilities;
• Operating voltage range: 5V~25V, maximum 40V;
• External reference voltage / support derating;
• PWM dimming (all channels or separate channels);
• Diagnostic function (for LED open/short circuit, IR configuration open/short current, chip junction temperature detection, overvoltage protection);
• A fault diagnostic bus with multiple slices;
• Optional mode "Fault feedback mode" or "single lamp operation";
• Functionally compatible with the E522.80 series;
• AEC-Q100 certification.
application:
• Automotive LED lighting, taillight lighting;
• Dynamic turn signal LED drive;
• OLED lighting driver;
Typical application block diagram:
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Hangzhou Jinjiu Electric Appliance Co Ltd. , https://www.jinjiufanmotor.com