MIC2299_11 Datasheet, PDF (2/14 Pages) Micrel Semiconductor – 3.5A Minimum, 2MHz High Brightness LED Driver

Micrel, Inc.
MIC2299
Ordering Information
Part Number
OVP
Frequency
Junction Temp. Range
Package
MIC2299-15YML
15V
2MHz
–40° to +125°C
12-Pin 3x3 MLF^®
Note
MLF® is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
Lead Finish
Pb-Free
Pin Configuration
BRT 1
SS/DIM 2
FB 3
AGND 4
PGND 5
PGND 6
12 COMP
11 EN
10 VIN
9 OVP
EP
8 SW
7 SW
12-Pin 3mm x 3mm MLF (ML)
(Top View)
Pin Description
Pin Number
1
2
3
4
5,6
7,8
9
10
11
12
Pad
Pin Name
BRT
SS/DIM
FB
AGND
PGND
SW
OVP
VIN
EN
COMP
EP
Pin Function
BRT (Input): Short this pin to GND to achieve 20% I_OUT (1V gives I_OUT at 100%).
As an alternative connect a resistor to GND to control the I_OUT to >0.2I_OUT. . A
10µA current source sets the voltage on the resistor. Hence a 50K resistor
would yield 0.5V which would be 50% of I_OUT nominal.
Soft start/dimming (input) 40kΩ source from V_FB. Connect a capacitor to GND
for soft-start. Clamp the pin to a known voltage to control the internal reference
voltage and hence the output current. This can also be done with a resistor to
GND
Feedback (Input): Output voltage sense node. Connect the cathode of the LED
to this pin.
Analog Ground
Power Ground
Switch Node (Input): Internal power BIPOLAR collector.
Over-Voltage Protection (OVP): Connect to the output voltage to clamp the
maximum output voltage. A resistor divider from this pin to ground could be
used to raise the OVP level beyond 15V (max).
Supply (Input): 2.5V to 10V for internal circuitry.
Enable (Input): Logic High enables regulator. Logic Low shuts down regulator.
Compensation pin (Input): Add external R and C to GND to stabilize the
converter.
Ground (Return): Backside exposed pad.
October 2007
2
M9999-101907-B