Microchip Technology HV9967BMG-G

Overview

HV9967BMG-G from Microchip Technology is an integrated LED driver IC with average-mode current control, featuring a 60V/0.8Ω internal N-channel MOSFET, ±3% LED current accuracy, fixed off-time regulation, and PWM dimming input. It operates as a constant-current buck controller for DC/DC or AC/DC LED lighting systems up to 60V input.

For engineers reviewing the HV9967BMG-G datasheet, HV9967BMG-G pinout, HV9967BMG-G application, or HV9967BMG-G equivalent, key selection criteria include its 0.8Ω integrated switch R_DS(on), 250mV current sense threshold, 40µs typical off-time (RT = 100kΩ), thermal shutdown at 145°C, and compatibility with external depletion-mode FETs for high-voltage linear regulator operation.

Technical Context

The HV9967BMG-G implements average-mode current control using switch-source current sensing at the RSENSE pin, eliminating peak-to-average error and removing need for loop compensation or high-side current sensing. Its open-loop feedback achieves stable LED current regulation independent of inductance variation, switching frequency drift, or output voltage changes.

Fixed off-time control is set via an external resistor on the RT pin (10kΩ–400kΩ range), generating 7–48µs off-times; the IC powers itself from the SW node during MOSFET off-time, enabling self-biasing without auxiliary supply. Short-circuit protection triggers at 400mV on RSENSE and enters 800µs hiccup mode to prevent inductor saturation.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Moisture Sensitivity Level 1, Pb-free/RoHS-compliant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL8862SP-13 and MPQ4425AGU-AEC1-P, the HV9967BMG-G uniquely combines 60V integration, self-biasing, ±3% accuracy, and hiccup-mode protection in an MSOP package - making it optimal for cost-sensitive, thermally constrained 12–48V LED applications where auxiliary supplies are undesirable.

Availability

HV9967BMG-G is available at Aetrix Electronics and suitable for DC/DC LED lighting, RGB backlighting, signage illumination, and charger status indication requiring stable component supply, RoHS compliance, and lead-free assembly support.

Supply support for HV9967BMG-G 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 specializing in microcontrollers, analog devices, and timing solutions, with design centers and manufacturing operations across the Americas, Asia, and Europe.

The HV9967B product line delivers highly accurate, integrated LED drivers for cost-sensitive, thermally constrained lighting applications - emphasizing simplicity, reliability, and minimal external component count in buck and hybrid regulator topologies.

FAQ

What is the maximum input voltage supported by the HV9967BMG-G?

The HV9967BMG-G supports a DC input voltage range of 8V to 60V at the SW pin. This 60V absolute maximum rating allows robust operation in 12V, 24V, and 48V systems, including automotive battery rails with load-dump transients. Exceeding 60V may cause permanent damage per Absolute Maximum Ratings on page 4 of the datasheet. The HV9967BMG-G must not be operated above this limit even momentarily.

How does the HV9967BMG-G achieve ±3% LED current accuracy without external compensation?

The HV9967BMG-G achieves ±3% LED current accuracy using average-mode current control that samples the MOSFET source current during each switching cycle and computes the true average - eliminating peak-to-average error inherent in peak-current mode controllers. Its auto-zero circuit cancels input offset voltage and propagation delay in the current sense comparator, and no loop compensation is needed because the control is inherently stable and insensitive to inductance or output voltage variation. This architecture is intrinsic to the HV9967BMG-G design.

Can the HV9967BMG-G drive an external high-voltage depletion-mode MOSFET?

Yes, the HV9967BMG-G can drive an external high-voltage depletion-mode MOSFET. As described in the General Description (page 1), the SW pin serves as both the drain of the internal MOSFET and the gate driver output for an external depletion-mode NFET. When configured this way, the external FET acts as a high-voltage linear regulator to power the HV9967BMG-G - enabling operation from input voltages beyond the 60V internal switch rating. This dual-mode capability is a defined feature of the HV9967BMG-G.

What is the purpose of the NC pin on the HV9967BMG-G MSOP package?

The NC (No Connection) pin on the HV9967BMG-G is an unconnected, unbonded pad in the 8-lead MSOP package. Per Table 2-1 (page 6), it has no internal connection and must remain electrically floating - no trace, copper pour, or component should be attached to it. This pin exists for mechanical symmetry and package compatibility but carries zero electrical function in the HV9967BMG-G. Routing to or terminating this pin violates Microchip's layout guidance.

Does the HV9967BMG-G require an external bootstrap capacitor?

No, the HV9967BMG-G does not require an external bootstrap capacitor. Its internal gate driver is designed for low-side N-channel MOSFET operation, and the IC derives its VDD supply from the SW node during the off-time - eliminating the need for bootstrap circuitry. The datasheet specifies only a 0.5µF low-ESR bypass capacitor from VDD to PGND (page 6), and no bootstrap components are referenced anywhere in the Typical Application Circuit (page 3) or Application Information (page 7). This self-biasing architecture is fundamental to the HV9967BMG-G.