High-Efficiency Dual-String. SM5306 Datasheet

SM5306 Dual-String. Datasheet pdf. Equivalent

SM5306 Datasheet
Recommendation SM5306 Datasheet
Part SM5306
Description High-Efficiency Dual-String
Feature SM5306; CONFIDENTIAL - Target Datasheet SM5306 High-Efficiency Dual-String with up to 10-WLED White LED Dr.
Manufacture Silicon Mitus
Datasheet
Download SM5306 Datasheet




Silicon Mitus SM5306
SM5306
High-Efficiency Dual-String with up to 10-WLED
White LED Driver
Description
The SM5306 is a current mode boost converter which
supplies the power and controls current in up to two strings
of 10 LEDs per string. Programming is done over an I2C-
compatible interface. The maximum LED current is
adjustable from 5mA to 28.5mA. At any given maximum
LED current the LED brightness is further adjusted with
exponential or linear dimming steps. Additionally, pulsed
width modulation (PWM) brightness control can be enabled
allowing for LED current adjustment by a logic level PWM
signal.
The boost switching frequency is programmable at 500kHz
for low switching loss performance or 1MHz to allow the
use of tiny low profile inductors. A setting for a 10% offset of
these frequencies is available. Over Voltage Protection is
programmable at 16V, 24V, 32V, or 40V to accommodate a
wide variety of LED configurations and schottky
diode/output capacitor combinations.
The SM5306 is available in a 12-bump, 1.65mm x 1.43mm
WLCSP package.
Applications
Mobile and Smart Phones LCD Backlight
Tablet LCD Backlight
Portable Devices LCD Backlight
Features
Drives up to Two String of 10 Series LEDs
11-bit Programmable Dimming Resolution
Exponential or Linear Brightness Control
PWM Brightness Control for CABC Operation
Independent Current Control per String
Internal Soft-Start Limits Inrush Current
Wide 2.5V to 5.5V Input Voltage Range
Adaptive Headroom Control
Selectable Boost Frequency of 500kHz or 1MHz with
Optionally Additional Offset
12-Bump 1.65mm x 1.43mm WLCSP Package
Protections
. Programmable 16V/24V/32V/40V Over-Voltage
Protection
. LED Open/Short Circuit Protection
. Thermal Shutdown
. Current Limit
Evaluation Board Request
Will be available
Ordering Information
Part
Temp. Range Pb-Free
SM5306 -40°C to +85°C
Yes
Package
12 WLCSP
0.4mm pitch
© 2014 Silicon Mitus, Inc.
July 2014 Rev. 0.0.4
1 / 22
www.siliconmitus.com



Silicon Mitus SM5306
SM5306
Pin Assignments
Top view
A
SDA
SCL
SW
B
HWEN
INTN
GND
C
PWM
SEL
IN
D
OVP
ILED2
ILED1
123
Bottom view
SW
SCL
SDA
A
GND
INTN
HWEN
B
IN
SEL
PWM
C
ILED1
ILED2
OVP
D
321
Pin Description
Pin
Name
A1
SDA
A2
SCL
A3
SW
B1
HWEN
B2
INTN
B3
GND
C1
PWM
C2
SEL
C3
IN
D1
OVP
D2
ILED2
D3
ILED1
Description
Data I/O pin for the I2C serial interface.
Clock Input pin for the I2C serial interface.
Switching Node of boost converter. SW pin is the drain of power N-MOSFET. Long traces
of inductor to this pin and this pin to rectifying diode should be avoided.
IC Enable Input. Drive this pin high to enable the device. Drive this pin low to force the
device into a low power shutdown. HWEN is a high-impedance input and cannot be left
floating.
Interrupt Output for fault status change. Open drain active low signal.
Ground.
External PWM Input for brightness control.
I2C Address Select. Ground selects address 0x36h and VIN selects address 0x38h.
IC Supply Input. In addition to using bulk capacitors of sufficient capacity, it is highly
recommended to use the shunt capacitor of low ESR/ESL to bypass high frequency noise.
Place shunt capacitor as close as possible to this pin.
Over Voltage Protection Pin. This pin is sensing the output voltage of the boost
converter. The boost converter output is connected to this pin directly.
LED Current Sink Regulation Input 2.
LED Current Sink Regulation Input 1.
www.siliconmitus.com
2 / 22
© 2014 Silicon Mitus, Inc.
July 2014 Rev. 0.0.4



Silicon Mitus SM5306
SM5306
Operational Diagram
VLED
IN
Bandgap Voltage/Current
Reference
INTN
LED Open Protection
Over Voltage Protection
Thermal Shutdown
Protections
SDA
SCL
SEL
PWM
HWEN
I2C Interface & Control
PWM
Sampler
Brightness
Control
SW
Boost
Controller
Lowest VILED
Detector
LED Open
Detector
GND
OVP
ILED1
ILED2
Current Source
© 2014 Silicon Mitus, Inc.
July 2014 Rev. 0.0.4
3 / 22
www.siliconmitus.com







@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)