Micrel introduced the MIC2860, the latest in its product family of high efficiency White LED (WLED) drivers that greatly extends battery life for portable display backlighting, and keypad backlighting in low cost mobile devices. The MIC2860-2D architecture provides the highest possible efficiency by eliminating switching losses present in traditional charge pumps or inductive boost circuits. It features a typical dropout of 52mV at 30.2mA per channel. This allows the WLEDs to be driven directly from the battery eliminating switching noise and losses present with the use of boost circuitry.
The two channels have better than ±0.5% matching, which ensures uniform display illumination under all conditions. The WLEDs brightness is externally preset by a resistor and dimmed using a single wire digital control signal. The MIC2860-2D single wire digital interface accepts digital programming pulses providing 32 dimming steps.
The MIC2860-2D is available in Thin SOT-23 and SC-70 six pin packages with a junction temperature range of
-40 °C to +125 °C.
Features
- High Efficiency (no switching losses)
- No charge pumps
- 2 WLED driver channels
- Single wire digital control
- Input voltage range: 3.0V to 5.5V
- WLED driver dropout of 52mV at 30.2mA
- Matching better than ±0.5% (typical)
- Current Accuracy better than ±1.0% (typical)
- Available in Thin SOT-23 and SC-70 6 pin package
Ordering Information
|
Standard Part Number
|
Junction Temp.
Range |
Package
|
|
MIC2860-2DYC6
|
-40°C to 125°C
|
6-Pin SC-70
|
|
MIC2860-2DYD6
|
-40°C to 125°C
|
6-Pin Thin SOT-23
|
