MIC2874 Datasheet, PDF (2/22 Pages) Micrel Semiconductor – 1.2A High-Brightness Flash LED Driver with Single-Wire Serial Interface

Micrel, Inc.
Ordering Information
Part Number
Marking Code
MIC2874YCS
74A
Note:
1. WLCSP bump A1 identifier = “•”.
Operating Ambient Temperature
Range
–40°C to +85°C
Pin Configuration
MIC2874
Package⁽¹⁾
9-bump 1.30mm x 1.30mm WLCSP
9-Bump 1.30mm x 1.30mm WLCSP (CS)
(Top View)
Pin Description
Pin Number
A1
A2
Pin Name
LED
DC
A3
OUT
B1
LGND
B2
FEN
B3
SW
C1
AGND
C2
VIN
C3
PGND
Pin Function
LED current sink pin. Connect the LED anode to OUT and cathode to this pin.
Single Wire Interface serial control input.
Boost converter output pin to be connected to the anode of the LED. Connect a low ESR ceramic
capacitor of at least 4.7µF at this pin to PGND.
Linear Ground. LED current return path.
Flash Mode Enable Pin. Asserting this pin high enables MIC2874 into the Flash mode. If this pin
is left floating, it is pulled-down internally by a built-in 1µA current source when the device is
enabled.
Inductor connection pin. It is connected to the internal power MOSFETs.
Analog Ground.
Supply Input pin. Connect a low ESR ceramic capacitor of at least 4.7µF at this pin to AGND.
Power Ground. Inductor current return path.
August 26, 2014
2
Revision 1.0