Monolithic Power Systems Inc. HR1215GY-0000-Z

Overview

HR1215GY-0000-Z from Monolithic Power Systems is a digital multi-mode PFC and current-mode LLC combo controller in SOIC-20 package, implementing hybrid CCM/DCM PFC control (up to 250 kHz) and LLC control (up to 500 kHz), with integrated HV start-up current source, adaptive dead-time adjustment, and X-capacitor discharge during AC dropout-enabling ATX and gaming PSU designs without external discharge circuitry.

For engineers reviewing the HR1215GY-0000-Z datasheet, HR1215GY-0000-Z pinout, HR1215GY-0000-Z application, or HR1215GY-0000-Z equivalent, key selection considerations include its UART-configurable burst/skip modes, dual-stage protection architecture (OVP/OCP/OLP/OPP/CMP), and digital current-mode stability across 85–265 VAC input ranges for high-efficiency AC-DC power supplies.

Technical Context

The HR1215 integrates two independent digital control loops: a PFC stage using patented digital average current mode with CCM/DCM transition based on load and input voltage, and an LLC stage employing current-mode control with ADTA, capacitive mode protection, and frequency-controlled burst mode. Both stages share a unified MTP memory (128 × 16 bits) for configuration storage and are managed via a half-duplex UART interface.

Its functional block includes dual ADCs (12-bit for CSP, 10-bit for ACIN/FBP/FBL), multiple DACs (8-bit for OVP/OCP/BI-BO, 10-bit for PFC/LLC set signals), and hardware-level protections including thermal shutdown (145°C), SO-pin overvoltage detection (1.5 V threshold), and ZVS-enabling zero-voltage switching threshold (15–25 mV).

Key Specifications

Pinout & Package

HR1215GY-0000-Z is housed in a standard SOIC-20 package (body width 7.5 mm, lead pitch 1.27 mm), rated MSL Level 3, with exposed pad not present. Pin functions are validated per MPS HR1215 Rev. 1.0 datasheet (pp. 4–5).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-mode PFC + LLC controller applications.

Compared with UCC28070DWR and ICE2PCS01G, HR1215GY-0000-Z delivers measurable advantages in no-load power (<45 mW vs >150 mW), burst-mode acoustic noise reduction (>12 dB), and certification readiness (IEC62368 X-cap discharge built-in), making it optimal for premium-tier AC-DC platforms.

Availability

HR1215GY-0000-Z is available at Aetrix Electronics and suitable for desktop PC power supplies, gaming PSUs, and LCD TV power systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for HR1215GY-0000-Z 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with over 20 years of leadership in DC-DC, AC-DC, and motor driver solutions.

The HR1215 belongs to MPS's digital AC-DC controller product line, designed specifically for high-efficiency, low-noise, and certification-ready server, computing, and consumer power supplies leveraging programmable digital control.

FAQ

Does HR1215GY-0000-Z require an external start-up resistor?

No. The device integrates a high-voltage (700 V rated) internal current source on the HV pin that provides both initial start-up current and X-capacitor discharge during AC dropout-eliminating the need for external start-up resistors or discharge networks per IEC62368.

What UART interface voltage levels does HR1215GY-0000-Z support?

The UART pin operates at 3.3 V logic level with an internal 1.6 kΩ pull-up resistor. It is half-duplex, requires no external transceiver, and must not be pulled high when VCC drops below 14.4 V (VCC_UVP2 threshold) to prevent communication errors or latch-up.

How is zero-voltage switching (ZVS) ensured in the LLC stage?

ZVS is enforced via adaptive dead-time adjustment (ADTA) and capacitive mode protection (CMP). ADTA dynamically tunes dead time based on SW node slew rate (>85 V/µs), while CMP monitors CSHB polarity to terminate gate drive before current reversal-guaranteeing ZVS without entering capacitive conduction.

Can HR1215GY-0000-Z operate without the UART interface after configuration?

Yes. All configuration parameters-including PFC/LLC timing, protection thresholds, and burst mode settings-are stored in on-chip MTP memory (128 × 16 bits). Once programmed, the device operates autonomously; UART is only required for reconfiguration or field updates.

What protection features are implemented on the SO pin?

The SO pin supports over-voltage protection (OVP) with a 1.5 V threshold and external over-temperature protection (OTP) via NTC thermistor. When triggered, the IC enters user-configurable protection mode-either auto-restart (for transient faults) or latch-off (for persistent failures)-with independent timeout and recovery settings.

Is HR1215GY-0000-Z pin-compatible with earlier HR1211 variants?

Yes. HR1215GY-0000-Z shares identical pinout, package (SOIC-20), and electrical characteristics with HR1211, enabling drop-in replacement. Key enhancements include improved X-cap discharge regulation (VCC_XCD = 17 V) and tighter thermal shutdown hysteresis (25°C vs 20°C).

What is the maximum recommended PCB copper area for thermal dissipation?

For SOIC-20 package, MPS recommends ≥200 mm² of 2-oz copper connected to PGND and GND pins on the bottom layer, with ≥4 thermal vias (0.3 mm diameter) per ground pad. This achieves θ_JA ≈ 52°C/W in standard 4-layer JEDEC test board, keeping T_J < 125°C at 1.5 W dissipation.