Használati útmutató Microchip MIC2870
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2018 Microchip Technology Inc.DS20006078A-page 1
MIC2870
Features
•Up to 1.5A Flash LED Driving Current
• 2.7V to 5.0V Input Voltage Range
•High-Efficiency 2 MHz V
F
Adaptive Boost Driver
•Configurable 1 or 2 Channel(s) WLED Driver
•LED Driving Current Soft-Start
•Control through I
2
C Interface or External Pins
•Flash Inhibit Function for GSM Pulse
Synchronization
•True Load Disconnect
•Flash Time-Out Protection
•1 µA Shutdown Current
•Available in 16-Pin 2 mm x 2 mm TQFN Package
Applications
•Camera Phones/Mobile Handsets
•Cellular Phones/Smartphones
•LED Light for Image Capture/Auto-Focus/
White Balance
•Handset Video Light (Torch Light)
•Digital Cameras
•Portable Applications
General Description
The MIC2870 is a high-current, high-efficiency flash LED
driver for one or two high-brightness camera flash LEDs.
The LED drive current is generated by an integrated
inductive boost converter with 2MHz switching
frequency, which allows the use of a very small inductor
and output capacitor. These features make the MIC2870
an ideal solution for high-resolution camera phone LED
flashlight driver applications.
MIC2870 supports two 750 mA white LEDs (WLEDs) or
a single 1.5A WLED configuration. When two WLEDs
are connected, their currents are matched automatically.
MIC2870 operates in either Flash or Torch mode that can
be controlled through either an I
2
C interface or external
pins. The brightness in the Flash and Torch mode can be
adjusted via two external resistors individually. The
high-speed mode I
2
C interface provides a simple control
at a clock speed up to 3.4 MHz to support most camera
functions, such as auto-focus, white balance, and image
capture (Flash mode).
The MIC2870 is available in 16-pin, 2 mm x 2 mm TQFN
package with a junction temperature range of –40°C to
+125°C.
1.5A Synchronous Boost Flash LED Driver with
I
2
C Interface
Termékspecifikációk
| Márka: | Microchip |
| Kategória: | nincs kategorizálva |
| Modell: | MIC2870 |
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