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.
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
|Part No.||Description||Board type||Order No.|
|E522.31||Boost to Battery Converter (650mA)||Demoboard||K52231-0002|
|E522.31||Boost to GND Converter (500mA)||Demoboard||K52231-0003|
|E522.31||Sepic Converter (750mA)||Demoboard||K52231-0004|
|E522.31||Buck to Battery Converter (3A)||Demoboard||K52231-0005|
|E522.32||Headlight LED Demo (2x Boost to Battery Topology) for High Beam, Low Beam (1A)|
and Daytime Running Light (750mA)
|E522.34||Buck to Battery dual phase Converter (6A)||Demoboard||K52232-0004|
If you have questions about our products please send an email to firstname.lastname@example.org or contact us:
Elmos Semiconductor SE
Phone: +49 (0) 231 / 75 49-0
Fax: +49 (0) 231 / 75 49-149