Shine Bright at any Topology.
One IC, performing brilliant in various applications.
Many applications, always fantastic performance
With the E522.3x chips, Elmos introduces an automotive LED controller family. The DC/DC ICs are designed for input voltages between 5V and 55V and output voltages of up to 80V in boost mode. They can be operated – depending on the type – in single or dual LED chain mode.
With an ambient temperature range of –40°C to +150°C, the Elmos DC/DC ICs are made especially for use in harsh environments such as automotive conditions.
In addition to high robustness, the components offer a great variety in the selection of circuit topologies, such as boost, SEPIC, Buck-Boost and Buck. The switching frequency can be adjusted from 250KHz up to 600KHz by means of an external resistor or synchronized with other components in master-slave configuration. Power consumption in sleep mode is only 8µA.
The versatility of the E522.3x controller family is completed by various control and monitoring functions, e.g. protection against short-circuit, overtemperature, overvoltage, undervoltage and load break.
The LED controllers support PWM and analog dimming for the LED brightness control, both are working in parallel. The PWM of E522.3x allows a wide dimming ratio of >1000:1 at PWM frequencies of up to 400Hz.
Your Frontlight All-Rounder
Analog and digital dimming
Current defined by external transistor
Two channel version with 180° phase shift
Overvoltage protection of LED chain
E522.31 - 1-channel, ± 40kHz spread spectrum
E522.33 - 1-channel
E522.32 - 2-channel, ± 40kHz spread spectrum
E522.34 - 2-channel
VIN : 5V to 55V
VOUT : up to 80V
Switch-mode, single or dual LED controller
Boost-, SEPIC, Buck-Boost- or Buck topology supported
Constant current regulation
High-precision differential high-side sense up to 60V
E522.31 | 1-channel, ± 40kHz spread spectrum
E522.32 | 2-channel, ± 40kHz spread spectrum
E522.31 | Demonstration Board (Boost to GND Topology) | PDF 0.9MB
E522.31 | Single LED SEPIC Controller Demoboard | PDF 0.7MB
E522.31 | Demonstration Board (Boost-to-VBAT Topology) | PDF 0.6MB
E522.31 | Demonstration Board (Buck-to-Battery) | PDF 6.2MB
E522.32 | Demonstration Board (Buck-to-Battery) | PDF 6.4MB
E522.32 | Demonstration Board (2 x Boost-to-Battery | Headlight LED Demo) | PDF 7.2MB
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