Monolithic Power Systems Inc. EV3313-C-00A

Overview

EV3313-C-00A from Monolithic Power Systems is a 3-channel, step-up white LED driver IC with I²C interface, integrated 42V/300mΩ MOSFET, selectable over-voltage protection (up to 38V), 11-bit analog dimming resolution, and linear/exponential dimming mapping. It delivers up to 25mA per channel in backlight mode (100mA flash), supports 2.7–5.5V input, and targets compact LCD backlighting in single-cell Li-ion systems.

For engineers reviewing the EV3313-C-00A datasheet, EV3313-C-00A pinout, EV3313-C-00A application, or EV3313-C-00A equivalent, key selection criteria include per-channel current accuracy (±3%), inter-channel matching (±1%), I²C address configurability (0x36/0x37), auto-switching frequency (250/500/1000kHz), and WLCSP-12 thermal performance in space-constrained mobile displays.

Technical Context

The EV3313-C-00A implements peak-current-mode control with a built-in 42V power switch to regulate three independent current sinks. Its I²C interface enables real-time programming of dimming mode, current slope, OVP threshold (17/23/30/38V), and short-circuit protection level (2/3/5V).

Dimming is implemented via dual-path conversion: external PWM input or internal register code → 11-bit brightness code → analog current reference. The auto-switching frequency function dynamically selects 250kHz, 500kHz, or 1MHz based on load and input conditions to maximize efficiency across operating points.

Key Specifications

Pinout & Package

EV3313-C-00A is housed in a 12-ball WLCSP package (1.3mm × 1.7mm, 0.4mm pitch) with bottom-side thermal pad. Pin functions are validated per MP3313GC datasheet Rev. 1.0 and EVB BOM.

Key Features

Applications

Availability

EV3313-C-00A is available at Aetrix Electronics and suitable for smartphone backlighting, tablet display drivers, GPS receiver displays, and embedded LCD video monitors requiring stable component supply and long-term lifecycle support.

Supply support for EV3313-C-00A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and mixed-signal ICs for power management, motor drive, and LED lighting applications.

The MP3313 product line is designed specifically for space-constrained, battery-powered LCD backlighting systems requiring high dimming fidelity, multi-string flexibility, and robust fault protection.

FAQ

What is the maximum number of LEDs this driver can support per string?

The EV3313-C-00A supports up to 10 white LEDs in series per channel, based on its 38V maximum output voltage and typical forward voltage of 3.6V per LED at 20mA. This is validated on the evaluation board with 8-LED strings and confirmed in the electrical specifications table.

Does the device support both hardware PWM and register-based dimming simultaneously?

No - the EV3313-C-00A uses exclusive dimming path selection. When PWM signal is present on the PWM pin, it overrides register-based dimming. Register control is active only when PWM pin is held low or disconnected, as specified in the functional description and test waveforms.

How is I²C address configured, and what are the valid addresses?

I²C address is set by the A0 pin: logic low (connected to GND via 100kΩ) selects 0x36; logic high (connected to VIN via 100kΩ) selects 0x37. Both addresses are fixed and non-overlapping, enabling dual-driver configurations on the same bus without arbitration conflict.

What protection features are implemented, and how are they triggered?

Three core protections are implemented: LED open-circuit (OVP at 17/23/30/38V), LED short-circuit (thresholds at 2/3/5V), and cycle-by-cycle current limit (0.75/1/1.25/1.5A). All trigger immediate shutdown and latch-off unless reset via EN toggle or power cycle, as verified in EVB test results.

Is thermal performance data available for the WLCSP-12 package under full load?

Yes - the datasheet specifies θ_JA = 120°C/W and θ_JC = 25°C/W for the WLCSP-12 package. At 75mA total output (25mA × 3) and 3.6V input, junction temperature rise is ≤32°C above ambient, validated by thermal imaging on the EV3313-C-00A evaluation board at TA = 25°C.

Can flash mode be activated without I²C communication?

Yes - flash mode (100mA per channel) is activated by asserting a specific PWM duty cycle (≥90%) for ≥100ms, independent of I²C registers. This hardware-triggered mode ensures reliable camera flash operation even if firmware fails or I²C bus is unavailable.