Microchip Technology HV440WG-G

Overview

HV440WG-G from Supertex Inc. is a high-voltage ring generator IC designed for telecom line interface applications, integrating P- and N-channel high-voltage transistors capable of delivering up to 70V_RMS sine wave output at 15–60Hz into 5 North American REN loads, with pulse-by-pulse overcurrent protection set by external sense resistors and 100kHz PWM logic input compatibility.

For engineers reviewing the HV440WG-G datasheet, HV440WG-G pinout, HV440WG-G application, or HV440WG-G equivalent, key selection considerations include its 220V maximum operating voltage, dual high-voltage supply rails (VPP1 up to +110V, VNN1 down to –110V), 16-lead SOW (WG) package, and mode-selectable single- or dual-input control architecture.

Technical Context

The HV440WG-G implements independent logic-controlled gate drivers for internal high-voltage P- and N-channel transistors, with dedicated VPSEN and VNSEN inputs enabling per-cycle current limiting referenced to VPP1 and VNN1 respectively. Its internal linear regulators generate VPP2 (VPP1 −9.9V to VPP1 −19.1V) and VNN2 (VNN1 +5.6V to VNN1 +10.5V) for gate biasing.

Operation supports two control modes: when MODE = HIGH, PIN and NIN independently drive the P- and N-channel outputs; when MODE = LOW, NIN alone controls both channels with a fixed 200ns deadband to prevent shoot-through. EN is an active-low enable that forces HVOUT to high-impedance state.

Key Specifications

Pinout & Package

Package: 16-lead SOW (Wide Body), 10.30 × 7.50 mm body, 2.65 mm max height, 1.27 mm pitch, RoHS-compliant (−G suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage ring generator applications.

Compared with MAX14951A+T and UCC3911D, the HV440WG-G uniquely balances integration (internal HV transistors + gate regulators), legacy compatibility (5V logic, 5/20 REN support), and ruggedness (220V abs max, pulse-by-pulse protection), making it optimal for industrial telecom line cards requiring long-term availability and proven reliability.

Availability

HV440WG-G is available at Aetrix Electronics and suitable for telephone line interface, set-top box ring generation, and pair gain systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for HV440WG-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

Supertex Inc. was a U.S.-based semiconductor company specializing in high-voltage analog and mixed-signal ICs before its acquisition by Microchip Technology in 2014; known for robust, application-specific solutions in telecom and industrial markets.

The HV440WG-G belongs to Supertex's high-voltage ring generator product line, engineered specifically for reliable, low-component-count implementation of Bellcore GR-909-compliant telephone ringing signals in carrier-grade and CPE equipment.

FAQ

What is the maximum load capability of the HV440WG-G without external MOSFETs?

The HV440WG-G delivers up to 70V_RMS sine wave output into a 5 North American REN load without external components. This is specified across the 15–60Hz frequency range with proper external filtering and transformer coupling. The device achieves this using its integrated high-voltage P- and N-channel transistors, eliminating the need for discrete HV switches in basic implementations. For higher loads up to 20 REN, the HV440WG-G requires two external MOSFETs: TN2524N8 (N-channel) and TP2522N8 (P-channel), driven via NGATE and PGATE pins.

How does the MODE pin affect control logic timing in the HV440WG-G?

When the MODE pin is pulled LOW, the HV440WG-G enters single-input mode where only the NIN signal controls both high-voltage transistors, with a fixed 200ns deadband enforced internally to prevent cross-conduction. When MODE is HIGH, PIN and NIN operate independently: PIN controls the P-channel (active-HIGH disables it), and NIN controls the N-channel (active-HIGH enables it). In either mode, the EN pin retains priority and forces HVOUT to high-impedance when asserted.

What are the absolute maximum voltage ratings for VPP1 and VNN1 on the HV440WG-G?

The HV440WG-G has an absolute maximum rating of +240V for the VPP1–VNN1 differential voltage, with individual limits of +120V on VPP1 and –170V on VNN1. However, for continuous operation, the recommended operating ranges are +15V to +110V for VPP1 and VPP1 −220V to –110V for VNN1. Exceeding these recommended ranges may compromise reliability or lifetime, even if below absolute maximums. These ratings reflect the device's suitability for telecom line interface applications subject to lightning and surge transients.

Can the HV440WG-G generate frequencies outside the 15–60Hz range?

The HV440WG-G is characterized and guaranteed to deliver compliant 70V_RMS ring signals within the 15–60Hz range into 5 REN loads, aligning with North American telephone standards. While the internal PWM logic accepts 100kHz inputs and the output stage can switch faster, performance outside this band-especially at lower frequencies (<15Hz) or higher frequencies (>60Hz)-is not specified for amplitude accuracy, distortion, or thermal stability. Applications requiring non-standard frequencies should validate output waveform fidelity, THD, and thermal behavior under actual load conditions.

What external components are mandatory for basic HV440WG-G operation?

Four external components are mandatory for basic HV440WG-G operation: (1) a 0.1µF capacitor between VPP2 and VPP1, (2) a 0.1µF capacitor between VNN2 and VNN1, (3) two current sense resistors connected to VPSEN and VNSEN for overcurrent protection, and (4) output filtering (e.g., 1.5mH inductor + 4.3Ω/0.22µF network) to shape the sine wave. Additional components like gate resistors or transformer coupling depend on system-level requirements but are not strictly mandatory for functional evaluation.