Microchip Technology HV9911NG-G-M901

Overview

HV9911NG-G-M901 from Microchip Technology is a switch-mode LED driver IC designed for single-switch DC/DC topologies (buck, boost, buck-boost, SEPIC), featuring closed-loop output current control, 250 V input capability, internal 7.75 V linear regulator, and 2% accurate 1.25 V reference. It delivers ±0.2 A/–0.4 A gate drive, programmable MOSFET current limit, and supports RGB backlight systems with >90% efficiency.

For engineers reviewing the HV9911NG-G-M901 datasheet, HV9911NG-G-M901 pinout, HV9911NG-G-M901 application, or HV9911NG-G-M901 equivalent, key selection considerations include high-side current sensing compatibility, constant-frequency or constant-off-time operation, TTL-compatible PWM dimming up to several kHz, OVP/short-circuit latched fault protection, and synchronization across multiple controllers.

Technical Context

The HV9911NG-G-M901 implements peak current-mode control with programmable slope compensation for stability at duty cycles >50%, and integrates a 1 MHz transconductance amplifier with 15:1 internal voltage divider for precise current regulation. Its dual-mode oscillator supports RT-to-GND (constant frequency) or RT-to-GATE (constant off-time) configuration, enabling flexible switching frequency selection between 88–112 kHz or 308–392 kHz.

It features a fault-tolerant sync I/O pin that locks multiple HV9911NG-G-M901 units to the highest-frequency oscillator, and includes dedicated CLIM and OVP comparators with independent thresholds (CLIM referenced to REF, OVP triggered at 1.25 V). The FAULT pin provides open-drain latched output for external disconnect FET control during overvoltage or short-circuit events.

Key Specifications

Pinout & Package

HV9911NG-G-M901 is housed in a 16-lead SOIC package with standard JEDEC MS-012AC footprint (5.3 mm × 10.2 mm, 1.27 mm pitch), optimized for thermal dissipation and board-level reliability in LED driver applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED driver controller applications.

Compared with MPQ3367-AEC1 and LT3761, HV9911NG-G-M901 uniquely combines 250 V input tolerance, topology flexibility (buck/boost/SEPIC), peer-to-peer sync, and programmable slope compensation - making it the only option for high-reliability, wide-input, multi-string RGB backlight and industrial signage applications.

Availability

HV9911NG-G-M901 is available at Aetrix Electronics and suitable for RGB backlight systems, battery-powered LED lamps, and industrial LED signage requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for HV9911NG-G-M901 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 is a global semiconductor company delivering microcontrollers, analog, FPGA, and mixed-signal solutions with emphasis on reliability, security, and longevity.

HV9911NG-G-M901 belongs to Microchip's high-voltage LED driver controller product line, engineered specifically for efficient, flexible, and fault-resilient constant-current LED power conversion across consumer, industrial, and automotive lighting applications.

FAQ

What topologies does the HV9911NG-G-M901 support?

HV9911NG-G-M901 supports buck, boost, buck-boost, and SEPIC topologies using a single external N-channel MOSFET. Its peak current-mode architecture with programmable slope compensation ensures stability across all configurations, especially at duty cycles exceeding 50%. The IC's high-side current sensing and 250 V VIN capability make it ideal for direct high-voltage input applications without pre-regulation.

How does the HV9911NG-G-M901 implement closed-loop current control?

HV9911NG-G-M901 uses an internal 1 MHz transconductance amplifier with tri-state output to close the current loop: the FDBK pin senses voltage across the LED current sense resistor, while the IREF pin sets the target current via a resistor divider from the 1.25 V REF output. The amplifier's output connects to the COMP pin, driving the current-sense comparator through a 15:1 internal divider - achieving high-accuracy, low-drift regulation independent of input or output voltage variations.

What protection features are built into the HV9911NG-G-M901?

HV9911NG-G-M901 includes latched output overvoltage protection (OVP), output short-circuit protection, and programmable MOSFET current limiting. OVP triggers when the OVP pin exceeds 1.25 V; short-circuit detection responds within 250 ns; both assert the open-drain FAULT pin low. The IC remains latched until power is recycled. Additionally, leading-edge blanking (100 ns minimum) prevents false triggering during MOSFET turn-on spikes.

Can multiple HV9911NG-G-M901 ICs be synchronized, and how?

Yes, HV9911NG-G-M901 ICs can be synchronized via their bidirectional SYNC pins. Connecting SYNC pins of multiple devices causes oscillators to lock to the highest-frequency unit. For reliable operation, use identical RT resistors across all synchronized ICs and add a ≥300 kΩ pull-down resistor if ringing occurs. The design supports up to four ICs directly; more require an external buffered clock. Synchronization eliminates beat frequencies and reduces EMI filtering requirements.

What is the role of the SC pin on the HV9911NG-G-M901?

The SC (Slope Compensation) pin on HV9911NG-G-M901 injects a programmable ramp signal into the current-sense comparator to stabilize peak current-mode control in constant-frequency operation above 50% duty cycle. A resistor between SC and GND sets the compensation slope; typical values range from 25 kΩ to 50 kΩ. In constant-off-time mode, slope compensation is unnecessary and the SC pin may be left open - simplifying design for lower-duty applications.