Microchip Technology HV9910BNG-G-M934

Overview

HV9910BNG-G-M934 from Microchip Technology is an open-loop, peak current mode LED driver IC optimized for buck topology. It features internal 8.0–450V linear regulation, selectable constant-frequency or constant-off-time operation, and dual linear/PWM dimming inputs (0–250mV LD, 0–100% duty PWMD). Designed for cost-sensitive, high-voltage DC/DC and AC/DC LED drivers, it delivers stable constant-current output with only three external components beyond the power stage.

For engineers reviewing the HV9910BNG-G-M934 datasheet, HV9910BNG-G-M934 pinout, HV9910BNG-G-M934 application, or HV9910BNG-G-M934 equivalent, key selection considerations include its 8–450V input range, 7.5V regulated VDD, 25kHz typical oscillator frequency (RT = 226kΩ), 165mA gate drive capability, and 250mV current sense threshold - all critical for LED current accuracy, thermal management, and dimming responsiveness in signage, backlighting, and industrial lighting designs.

Technical Context

The HV9910BNG-G-M934 implements open-loop peak current control using a fast 80ns comparator with 150–315ns blanking time to reject turn-on spikes. Its oscillator supports two modes: constant-frequency (RT-to-GND) or constant-off-time (RT-to-GATE), enabling inherent input voltage rejection at high duty cycles without slope compensation.

It integrates an 8.0–450V linear regulator delivering 7.5V ±0.25V at VDD with ≤100mV load regulation (0–1mA) and ≤1.0V line regulation (8–450V VIN). The GATE driver provides symmetrical 165mA sink/source with 30–50ns rise/fall times into 500pF, supporting external N-channel MOSFETs with QG <15nC above 100kHz.

Key Specifications

Pinout & Package

HV9910BNG-G-M934 is housed in a 16-lead SOIC (Narrow Body), 9.90×3.90mm body, 1.75mm max height, 1.27mm pitch, Pb-free (e3) package. Pin 1 is located at the index area per JEDEC MS-012AC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCL30001DR2G and AL8862Q-13, HV9910BNG-G-M934 uniquely combines ultra-wide 8–450V input tolerance, integrated HV regulator, dual-mode oscillator, and dual-dimming support - making it the only choice for cost-optimized, non-isolated buck LED drivers requiring single-supply operation and flexible dimming in industrial and signage applications.

Availability

HV9910BNG-G-M934 is available at Aetrix Electronics and suitable for RGB backlighting, flat panel display backlight, and decorative LED signage requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for HV9910BNG-G-M934 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 provider of microcontrollers, analog, FPGA, and mixed-signal semiconductors, with core expertise in embedded control and power management ICs.

HV9910BNG-G-M934 belongs to Microchip's universal high-brightness LED driver family, engineered specifically for cost-sensitive, non-isolated buck LED drivers in signage, backlighting, and general-purpose constant-current applications.

FAQ

What is the maximum input voltage supported by HV9910BNG-G-M934?

HV9910BNG-G-M934 supports an absolute maximum VIN of +470V, with continuous operation rated from 8.0V to 450V DC. Thermal limits govern practical maximum voltage: for the 16-lead SOIC package (θja = 83°C/W), sustained operation at 450V requires careful attention to power dissipation - typically achieved using a series Zener diode to divert excess regulator loss, as documented in Section 3.1 of the datasheet. The HV9910BNG-G-M934's internal regulator maintains stable 7.5V VDD across this full range.

How does HV9910BNG-G-M934 implement dimming control?

HV9910BNG-G-M934 supports two independent dimming methods: linear dimming via the LD pin (0–250mV input adjusts current sense threshold) and PWM dimming via the PWMD pin (0–100% duty cycle, TTL/CMOS compatible). The PWMD signal directly gates the GATE driver with near-instantaneous response, while LD provides analog adjustment of LED current magnitude. Both interfaces can be used simultaneously - for example, LD sets baseline current and PWMD modulates around that level. This dual capability is explicitly confirmed in the HV9910BNG-G-M934 datasheet Sections 1.1 and 3.5–3.6.

Can HV9910BNG-G-M934 operate without an external current sense resistor?

No, HV9910BNG-G-M934 requires an external current sense resistor (RCS) connected between the power FET source and GND to generate the voltage sensed at the CS pin. The IC compares this voltage against either the internal 250mV reference or the LD pin voltage to determine GATE turn-off timing. Omitting RCS disables current regulation entirely, risking FET destruction. The datasheet specifies RCS calculation in Section 3.0 and Table 1-1 confirms the 225–275mV CS threshold - confirming mandatory external sensing. HV9910BNG-G-M934 has no internal sense FET or alternative current measurement path.

What oscillator configurations does HV9910BNG-G-M934 support?

HV9910BNG-G-M934 supports two distinct oscillator modes selected by RT pin connection: constant-frequency mode (RT tied to GND) and constant-off-time mode (RT tied to GATE). In constant-frequency mode, RT sets the oscillator period per tOSC = (RT + 22)/25 μs; in constant-off-time mode, the same equation defines the off-time duration. This dual-mode flexibility is a defining feature of the HV9910BNG-G-M934, enabling designers to choose between EMI-controlled fixed frequency or input-voltage-rejecting variable frequency - both validated in Section 3.3 and Table 1-1 of the official datasheet.

Is HV9910BNG-G-M934 pin-compatible with the original HV9910?

Yes, HV9910BNG-G-M934 is an enhanced drop-in replacement for the HV9910, sharing identical pinout, package dimensions, and functional block diagram. The datasheet explicitly states "Enhanced drop-in replacement to the HV9910" in the Features section and confirms identical 16-lead SOIC pin mapping in Table 2-1. Key improvements include faster 80ns current sense comparator response (vs. HV9910's slower comparator), tighter VDD regulation (±0.25V vs. ±0.5V), and improved thermal performance - all while maintaining full electrical and mechanical compatibility with existing HV9910 layouts.