Microchip Technology MSL2162DQ-R

Overview

MSL2162DQ-R from Microchip Technology (formerly Atmel) is a 16-string white/RGB LED driver IC with adaptive DC-DC efficiency optimization, 12-bit per-string PWM dimming, ±1.5% current accuracy, and integrated EEPROM for power-up configuration. It drives external MOSFETs to sink up to 350mA per string and supports fault detection (open/short LED, over-temperature), making it suitable for high-dynamic-range LCD TV backlighting.

For engineers reviewing the MSL2162DQ-R datasheet, MSL2162DQ-R pinout, MSL2162DQ-R application, or MSL2162DQ-R equivalent, key selection considerations include SPI-synchronized frame-by-frame dimming, dual Efficiency Optimizer (EO) outputs for multi-supply control, per-string current sense inputs (S0–S15), gate drive outputs (G0–G15), and -40°C to +105°C industrial operating range.

Technical Context

The MSL2162DQ-R implements a master-slave SPI architecture supporting up to eight daisy-chained devices on one bus at 20 MHz, enabling synchronized frame-level dimming across large displays. Its PWM engine accepts external video sync signals (PHI/VSYNC and GSC/HSYNC) with programmable frequency multipliers (1×–32×) and supports phase-shifted per-string timing to reduce motion blur and input capacitor stress.

Two independent Efficiency Optimizer (EO) circuits-FBO1 and FBO2-dynamically regulate external DC-DC supplies by adjusting feedback nodes to minimize headroom voltage while maintaining ±1.5% current matching across 16 strings. The device uses external MOSFETs with gate drive capability up to 10 nC charge and drain sense inputs (D0–D15) for open-circuit fault detection at ≥8 V threshold.

Key Specifications

Pinout & Package

MSL2162DQ-R is housed in a 64-lead, 9 mm × 9 mm × 0.85 mm TQFN package with 0.5 mm lead pitch and an exposed thermal pad (EP) connected to system ground. The package supports high-power dissipation (2100 mW at TA = 70°C) and requires ceramic bypass capacitors on VIN (10 µF), VCC (4.7 µF), and VDD (4.7 µF).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-string LED driver applications.

Compared with TLC6983RTQR and ISL97693IRTZ-T7A, the MSL2162DQ-R uniquely combines external MOSFET flexibility, dual Efficiency Optimizer outputs, on-chip EEPROM, and -40°C to +105°C operation-making it the only option qualified for high-reliability, adaptive-power, and video-synchronized direct-backlight systems.

Availability

MSL2162DQ-R is available at Aetrix Electronics and suitable for LCD TV backlighting, medical display illumination, and automotive infotainment systems requiring stable component supply, long lifecycle support, and industrial-grade thermal performance.

Supply support for MSL2162DQ-R 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

Microchip Technology acquired Atmel in 2016 and maintains full product support, documentation, and qualification for legacy Atmel analog and LED driver portfolios including the MSL2162 series.

The MSL2162 product line was designed specifically for adaptive, video-synchronized LED backlighting in high-end displays-emphasizing efficiency optimization, per-string control, and robust fault handling for mission-critical visual systems.

FAQ

What is the maximum number of MSL2162DQ-R devices that can be daisy-chained on a single SPI bus?

The MSL2162DQ-R supports up to eight devices per chip select (CSB) line using its 20 MHz SPI interface with broadcast write capability. Each device is assigned a unique slave ID via the ADDR pin, enabling coordinated frame-by-frame dimming across large display panels without additional microcontroller overhead. This scalability is integral to the MSL2162DQ-R architecture for multi-zone backlight systems.

How does the MSL2162DQ-R achieve ±1.5% current matching across 16 LED strings?

The MSL2162DQ-R achieves ±1.5% current matching by using precision 500 mV full-scale current sense inputs (S0–S15) tied to individual external sense resistors, combined with matched internal regulation circuitry and layout-aware design. This matching is specified across temperature (-40°C to +105°C) and ensures consistent luminance and white point in RGB backlight applications-critical for the MSL2162DQ-R's target use in HDR TVs and medical displays.

Can the MSL2162DQ-R operate without external video synchronization signals like PHI or GSC?

Yes, the MSL2162DQ-R includes an internal oscillator and standalone PWM generator, allowing full functionality without PHI or GSC inputs. In non-video applications such as architectural signage, it generates internal timing and supports external PWM input on the PWM pin (0–5 kHz, 0–100% duty cycle). This dual-mode capability makes the MSL2162DQ-R adaptable to both video-synchronized and general-purpose LED lighting systems.

What protection features does the MSL2162DQ-R provide against LED string faults?

The MSL2162DQ-R provides hardware-level open-circuit detection (via D0–D15 pins, ≥8 V threshold), short-circuit detection (via S0–S15 voltage deviation), loss-of-video-sync monitoring, and over-temperature shutdown at 135°C. All faults trigger the active-low FLTB pin and populate dedicated status registers readable via SPI-enabling rapid diagnostics and fail-safe response in safety-critical applications using the MSL2162DQ-R.

How is EEPROM used in the MSL2162DQ-R, and what parameters can be stored?

The MSL2162DQ-R integrates on-chip EEPROM to store power-up default values for all configuration registers-including global and per-string PWM settings, Efficiency Optimizer enable states, fault mask bits, and sync timing parameters. These values auto-load at power-on, ensuring deterministic startup behavior. Users reprogram EEPROM via the SPI interface, making the MSL2162DQ-R ideal for field-updatable, calibration-critical backlight systems.