Renesas has released the R2A20134 LED driver IC that supports LED lighting applications with high efficiency and a high power factor at low cost.
Voltage step-down control (single-stage) provides a high line-to-ground voltage. In addition, the ability to select low-voltage MOSFETs (voltage tolerance of only 500 to 300 V, rather than the typical 700 V) contributes to lower system cost.
High-voltage control and critical-conduction mode enable zero-current switching at turn on and switching in a low drain-source voltage state.
As a result, the driver enables reduction of power loss during switching and achieves the power factor of 92% by reducing the power loss during switching.
In addition, critical-conduction mode allows power factor correction (PFC) control using few external components and realises a power factor of 0.9 or higher.
A variety of control modes can be achieved by changing the configuration of the externally connected elements. Examples include buck-boost control, average-current control, peak-current control and constant-input-power control.
The driver can also be used in Triac dimmer applications by applying a voltage matched to the Triac phase to the FB (feedback) pin for constant-current control.
Phone: 02 9550 6600
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