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MP3373

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8-Channel 350mA/ch Boost WLED Controller with Phase Shift and Ext. Current Sink BJTs

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Datasheet (EN)

Product Description

The MP3373 is a step-up controller with 8-channel external current sources designed for driving the WLED arrays for large size LCD panel backlighting applications. The MP3373 employs peak current mode, fixed frequency architecture to provide robust operation with 9V to 40V input supply. The switching frequency is programmable by an external frequency setting resistor. The MP3373 integrates the constant current control circuit to regulate each LED string current to the programmed value set by an external resistor. And the current matching can achieve 1.2% regulation accuracy between strings. Its low 200mV regulation voltage on LED current sources reduces power loss and improves efficiency. To reduce inrush current and the stress of components, MP3373 employs the phase shift PWM dimming mode which can be disabled by pulling PSEN pin to GND. MP3373 also includes UVLO, LED short/open protection, inductor/diode short protection and thermal shut down protection. All these faults are indicated by the fault flag signal. The MP3373 is flexible for extending LED channels with two or three ICs in parallel with sharing one power stage. It is available in TSSOP-28 and SOIC-28 packages.

Product Features

9V to 40V Input Voltage Range
8-Channel LED strings with external current balance
1.2% Current Matching Accuracy Between Strings
Programmable Switching Frequency
External PWM Dimming
Selectable Phase Shift Function at PWM DIM Mode
Open/Short LED Protection
Short Inductor/Diode Protection
Programmable Over-voltage Protection
Thermal Shutdown
Fault Flag Output
Extendable LED Channels with Share One Set of Power Stage
TSSOP-28 and SOIC-28 Packages

Parametrics

Ishutdown (µA)1
Vin (min) (V)9
Vin (max) (V)40
Channels8
fsw (min) (kHz)100
Ichannel (max) (A)0.35
LEDx ABS Voltage (V)55
fsw (max) (kHz)1000
Vfb (V)0.2
GradeCatalog
PackageSOIC-28, TSSOP28
Power MOSFETExternal
TopologyBoost
Dimming (Output)P-Dim, A-Dim
Iq (mA)5
Typical LCD Screen SizesLarge (30"-45"), Large+ (>45")
Other FeaturesCascade, Inductor Short Protection, Phase Shift PWM Dimming

8 Strings, Step Up WLED Controller with External Transistor

The MP3373 is a step-up controller with 8-channel external current sources designed for driving the WLED arrays for large size LCD panel backlighting applications.

The MP3373 employs peak current mode, fixed frequency architecture to provide robust operation with 9V to 40V input supply. The switching frequency is programmable by an external frequency setting resistor.

The MP3373 integrates the constant current control circuit to regulate each LED string current to the programmed value set by an external resistor. And the current matching can achieve 1.2% regulation accuracy between strings. Its low 200mV regulation voltage on LED current sources reduces power loss and improves efficiency.

To reduce inrush current and the stress of components, MP3373 employs the phase shift PWM dimming mode which can be disabled by pulling PSEN pin to GND.

MP3373 also includes UVLO, LED short/open protection, inductor/diode short protection and thermal shut down protection. All fault status is indicated by fault flag signal.

The MP3373 is flexible for extending LED channels with two or three ICs in parallel with sharing one power stage. It is available in TSSOP28 and SOIC28 packages.

$100.00 + tax

Quality Policy, Certificates & Reliability Reports

All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.

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