LED Driver. MP3309C Datasheet

MP3309C Driver. Datasheet pdf. Equivalent

MP3309C Datasheet
Recommendation MP3309C Datasheet
Part MP3309C
Description White LED Driver
Feature MP3309C; MP3309C 2.7V-5.5V Input, 38V Output, FSW Programmable, White LED Driver with I2C Interface DESCRIPT.
Manufacture MPS
Datasheet
Download MP3309C Datasheet




MPS MP3309C
MP3309C
2.7V-5.5V Input, 38V Output,
FSW Programmable, White LED Driver
with I2C Interface
DESCRIPTION
The MP3309C is a WLED step-up converter for
2.7V to 5.5V input that uses peak current mode
to regulate the LED current sensed through an
external low-side resistor. The 200mV feedback
voltage and synchronous rectification reduces
power loss and reduces PCB space
requirements. For non-synchronous mode,
setting an internal register can disable the
rectifier MOSFET to save driver losses.
The MP3309C features a programmable
switching frequency to optimize efficiency. It
supports both analog and PWM dimming.
In addition, the MP3309C has LED open
protection, cycle-by-cycle current limit
protection, thermal shutdown protection, and
VOUT to GND short-circuit protection. The I2C
interface can set the protection indication bits
and over-voltage protection point.
FEATURES
2.7V to 5.5V Input Voltage
Analog and PWM Dimming
Selectable Synchronous or Non-
synchronous Mode
400kHz I2C-Compatible Interface
Digitally Set LED Current
Programmable Switching Frequency
Programmable Open Load Protection Point
Low 200mV Feedback Voltage with ±1%
Accuracy at Room Temperature
Software Enable Function
UVLO, Thermal Shutdown
Available in a 1.4×1.8mm FCQFN10
Package
APPLICATIONS
Feature Phones and Smart Phones
Tablets
<10in Video Displays
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
C1
GND
SCL
SDA
EN/PWML
R2
L1
C2
SW BST
C3
IN
VOUT
MP3309C
SDA
SCL
PWM
FREQ
FB
R1
GND
Typical Application Circuit
MP3309C Rev. 1.0
www.MonolithicPower.com
1
2/26/2019
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2019 MPS. All Rights Reserved.



MPS MP3309C
MP3309C 2.7V-5.5V INPUT, 38V OUTPUT, FSW-PROGRAMMABLE, WHITE LED DRIVER WITH I2C INTERFACE
ORDERING INFORMATION
Part Number
Package
Top Marking
MP3309CGQG
QFN-10 (1.4mm×1.8mm)
See Below
For Tape & Reel, add suffix Z (e.g. MP3309CGQGZ);
TOP MARKING
CJ: Product code of MP3309CGQG
LL: Lot number
PACKAGE REFERENCE
TOP VIEW
SCL BST VOUT
10
9
8
SDA 1
VIN 2
7 SW
6 GND
3
4
5
EN/PWML FREQ FB
QFN-10 (1.4mm×1.8mm)
MP3309C Rev. 1.0
www.MonolithicPower.com
2
2/26/2019
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2019 MPS. All Rights Reserved.



MPS MP3309C
MP3309C 2.7V-5.5V INPUT, 38V OUTPUT, FSW-PROGRAMMABLE, WHITE LED DRIVER WITH I2C INTERFACE
PIN FUNCTIONS
Pin #
1
2
3
4
5
6
7
8
9
10
Name Description
SDA I2C clock data input.
VIN
Input supply. Provides power for the internal power and logic circuits. Must be locally
bypassed.
PWM brightness control/enable. Apply a PWM signal for PWM dimming. The PWM
EN/PWML
frequency is proportional to the LED current dimming ratioa lower dimming
frequency results in a smaller dimming current. For most applications, use a frequency
range of 200Hz to 2kHz. A low-level signal longer than 20ms will shut down the IC.
FREQ
Switching frequency set. Connect a resistor between FREQ and GND to program
the converter switching frequency. Do not leave this pin floating.
FB
LED current feedback. Regulates the voltage across the current sense resistor
between FB and GND to 200mV.
GND Ground.
Power switch node. Drain of the internal low-side MOSFET. Connect the power
SW inductor between SW and VIN. For non-synchronous mode, connect a Schottky diode
between SW and VOUT.
VOUT
Output voltage. Internally connected to the source of the synchronous MOSFET. For
non-synchronous mode, connect a Schottky diode between SW and VOUT.
BST
Booststrap. Connect a capacitor between SW and BST to provide the synchronous
MOSFET gate driver.
SCL I2C interface clock signal.
ABSOLUTE MAXIMUM RATINGS (1)
VIN ...................................................-0.3V to +6V
VSW, VOUT…………………………..-1V to +40V
VBST ......................................... -0.3V to VSW +6V
All Other Pins .................................0.3V to +6V
Junction Temperature ...............................150°C
Lead Temperature ....................................260°C
Continuous Power Dissipation .... (TA = 25°C) (2)
FCQFN10(1.4x1.8mm) .......................... 0.892W
Recommended Operating Conditions (3)
Supply Voltage (VIN)........................2.7V to 5.5V
Operating Junction Temp. (TJ). -40°C to +125°C
Thermal Resistance (4) θJA θJC
QFN-10 (1.4mm×1.8mm) ..... 140...... 30 °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ (MAX), the junction-to-
ambient thermal resistance θJA, and the ambient temperature
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by PD (MAX) = (TJ
(MAX)-TA)/θJA. Exceeding the maximum allowable power
dissipation will cause excessive die temperature, and the
regulator will go into thermal shutdown. Internal thermal
shutdown circuitry protects the device from permanent
damage.
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on JESD51-7, 4-layer PCB.
MP3309C Rev. 1.0
www.MonolithicPower.com
3
2/26/2019
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2019 MPS. All Rights Reserved.







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