Hybrid LED driver for multi-channel output with high consistency
- Resource Type
- Conference
- Authors
- Yu, D. J.; Yu, Q.; Ning, Ning; Liu, Y.; Shi, Z. Y.
- Source
- 2015 IEEE 11th International Conference on ASIC (ASICON) ASIC (ASICON), 2015 IEEE 11th International Conference on. :1-4 Nov, 2015
- Subject
- Components, Circuits, Devices and Systems
Light emitting diodes
Logic gates
Mirrors
Hybrid power systems
MOSFET
Impedance matching
Power generation
- Language
- ISSN
- 2162-755X
In this paper, a hybrid LED driver for multi-channel output with high consistency is presented. The proposed design utilizes voltage buffer arrays to drive large power MOSFET instead of utilizing conventional single voltage buffer. Also, it can achieve high consistency for multi-output stages and avoid the effect of offset voltage which greatly reduces the accuracy. By setting appropriate biasing current of the buffer to drive the gate of the power MOS, the output current matching precision of each channel is nearly unaffected by the offset of each buffer amplifier. At the same time each power MOSFET can work at a high speed.