LN33X61Q1_M&X SEMICONDUCTOR CO., LTD.

LN33X61Q1

The LN33X61Q1 is a high efficiency, compact, synchronous step-down LED driver employing a constant frequency, peak current mode control architecture with internal compensation. It operates from an input voltage from 3.5V to 60V and integrates both high-side and low-side power MOSFETs with up to 0.6A/1A/1.5A output capability. The nominal switching frequency is fixed on 400kHz, 1MHz or 2.1MHz.Automatic frequency foldback at light load improvesefficiency.

Description

Features

● AEC-Q100 Grade 1 Qualified for automotive applications

● Wide VIN Range: 3.5V to 60V

● Up to 0.6A/1A/1.5A Output Capability

● Integrated both High-Side and Low-Side Power MOSFETs

● Spread Spectrum Option for Low EMI Applications

● Frequency Options: 400kHz, 1MHz, 2.1MHz

● PWM Dimming

● Fault Indicator for LED Short, Open

● 0.2V Reference for LED Current Sense

● High Efficiency PFM Operation

● Near 100% Duty Cycle Operation for Low Drop Out Operation

● Accurate Peak and Valley Clamp

● Internal Compensation

● Accurate VIN UVLO Protection

● Over-Temperature Shutdown and Recovery

● Operating Junction Temperature -40˚C to 150 ˚C

● Thermally Enhanced SOIC-EP8 Package (4.9mm X 3.9mm)

Description

The LN33X61Q1 is a high efficiency, compact, synchronous step-down LED driver employing a constant frequency, peak current mode control architecture with internal compensation.

It operates from an input voltage from 3.5V to 60V and integrates both high-side and low-side power MOSFETs with up to 0.6A/1A/1.5A output capability.

The nominal switching frequency is fixed on 400kHz, 1MHz or 2.1MHz.Automatic frequency foldback at light load improvesefficiency.
The LN33X61Q1 provides multiple features such as precision enable, fault indicator and internal soft start.

Full protection features include input UVLO, over temperature shutdown, cycle-by-cycle current limit, and short-circuit protection.

The fault indicator outputs logiclow signal if a fault condition occurs.

PWM dimming is achieved by applying an externalPWM signal at the EN/DIM pin.

The average LED current is proportionally scaled with PWM duty cycle.

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