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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > AC DC Converters, Offline Switches

Monolithic Power Systems Inc. HFC0310GS-P

Name: HFC0310GS-P
Brand: Monolithic Power Systems Inc.
SKU: HFC0310GS-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HFC0310GS-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: AC DC Converters, Offline Switches

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: HFC0310GS-P.pdf

Description:: FIXED-FREQUENCY FLYBACK CONTROLL

Quantity:: RFQ Add To RFQ list

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Product details

Overview

HFC0310GS-P from Monolithic Power Systems is a programmable fixed-frequency flyback controller implementing peak current-mode control for AC/DC power supplies. It supports switching frequencies up to 600 kHz via external FSET capacitor, enters active-burst mode below 0.5 V FB threshold to achieve <12 μA standby current, and integrates VCC UVLO (8.5–13.2 V), over-voltage (21–25 V), short-circuit, and thermal shutdown protections. Used in multi-output 12V/0.8A + dual 8V adapters.

For engineers reviewing the HFC0310GS-P datasheet, HFC0310GS-P pinout, HFC0310GS-P application, or HFC0310GS-P equivalent, key selection criteria include burst-mode FB thresholds (0.43–0.57 V entry / 0.66–0.80 V exit), CS pin short-circuit trip at 1.60–1.84 V, PRO pin hysteresis (0.2 V), and SOIC8 thermal resistance (θJA = 96 °C/W).

Technical Context

The HFC0310GS-P employs peak current-mode PWM with internal slope compensation (27–57 mV/μs at 100 kHz) and dual leading-edge blanking (180–400 ns for CS, 150–370 ns for SCP) to suppress noise-induced false triggering. Its frequency shaping function dithers ±3.5% of f_S to reduce EMI filter cost without requiring external spread-spectrum circuitry.

Operation relies on FB voltage division ratio (IDIV = 3–4) to set current sense threshold, with soft-start time fixed at 3 ms and VCC recharge level (5.8–7.0 V) enabling auto-recovery after OVP/OTP faults. The PRO pin provides externally configurable shutdown with 3.1–3.5 V activation and 0.2 V hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Switching Frequency	Programmable up to 600 kHz via FSET capacitor; enables compact transformer design and EMI compliance without external dithering.
Burst Mode Thresholds	Enters burst at FB ≤ 0.43–0.57 V; exits at FB ≥ 0.66–0.80 V - ensures stable light-load regulation while minimizing no-load power.
VCC UVLO Range	Turn-on at 10.8–13.2 V; turn-off at 8.5–10.5 V - guarantees reliable start-up from auxiliary winding and prevents brownout oscillation.
CS Short-Circuit Trip	Shuts down when CS ≥ 1.60–1.84 V - protects primary MOSFET during output short with fast response and auto-recovery.
Thermal Shutdown	Activates at 150 °C; recovers at 110 °C (40 °C hysteresis) - prevents permanent die damage under sustained overload or poor heatsinking.
Start-Up Current	12–20 μA - allows use of high-value start-up resistors to minimize power loss during initial charge of VCC capacitor.
FSET Source Current	40–60 μA - sets precise oscillator timing with standard ceramic capacitors; enables accurate frequency programming across temperature.

Pinout & Package

Available in SOIC8 package (JEDEC MS-012, variation AA), with 1.27 mm pitch, 3.9 mm × 4.9 mm body, and 1.75 mm max height. Thermal resistance θ_JA = 96 °C/W on 4-layer PCB.

Pin/Terminal	Circuit Role	Design Meaning
1 FSET	Frequency Set Input	Connects to GND via capacitor to program switching frequency; internal 40–60 μA current source enables precise f_S calculation.
2 VCC	Power Supply Input	Accepts 11–20 V DC; powers internal circuitry and drives gate driver; includes UVLO (8.5–13.2 V) and OVP (21–25 V).
3 NC	No Connect	Internally unconnected; must remain floating per datasheet - no routing or grounding allowed.
4 Drv	Gate Drive Output	Push-pull driver with 17–34 Ω sourcing / 9–17 Ω sinking impedance; directly drives external MOSFET gate.
5 CS	Current Sense Input	Monitors primary-side current via sense resistor; triggers SCP at 1.60–1.84 V and OLP after 8192-cycle delay.
6 PRO	External Protection Input	Pulled high to shut down IC; activates at 3.1–3.5 V with 0.2 V hysteresis - used for input OVP or system-level fault signaling.
7 GND	Signal Ground Reference	Primary return path for FB, CS, PRO, and internal regulators; requires low-impedance connection to power ground plane.
8 FB	Feedback Input	Receives optocoupler output; sets current limit via IDIV ratio (3–4); controls burst mode and OLP (3.5–4.0 V trip).

Key Features

Feature	Design Value
Programmable Fixed-Frequency Operation	Enables deterministic EMI filtering and predictable transformer design via FSET capacitor - avoids variable-frequency jitter trade-offs.
Active-Burst Mode with Dual FB Thresholds	Reduces standby power to <12 μA by gating switching only when FB crosses 0.43–0.57 V (enter) and 0.66–0.80 V (exit), minimizing no-load losses.
Integrated Slope Compensation	Provides 27–57 mV/μs ramp at 100 kHz to prevent subharmonic oscillation in continuous conduction mode flyback designs.
Dual Leading-Edge Blanking	Blocks false CS-triggering for 180–400 ns (normal) and 150–370 ns (SCP), ensuring robust operation during MOSFET turn-on spikes.
Auto-Recovering Protections	OLP, SCP, OVP, and OTP all resume operation after fault clearance - eliminates need for manual reset or external latch circuitry.

Applications

Power Meters

AC/DC Adapters

Use Scenario: Multi-output isolated supply for metrology-grade electricity meters with 12V logic rail and dual 8V sensor rails.

IC Role / Device Role / Timing Role: Primary-side flyback controller managing 230VAC-to-12V/0.8A + 8V/0.2A + 8V/0.05A conversion with burst-mode efficiency at meter sleep state.

Use Value: Achieves <300mW no-load consumption via FB-controlled burst mode and 12 μA start-up current, meeting IEC 62053-21 Class 0.2 accuracy requirements.

Use Scenario: Universal-input (85–420VAC) wall adapter powering consumer electronics with tight size constraints.

IC Role / Device Role / Timing Role: Fixed-frequency peak-current-mode controller enabling 100 kHz operation and frequency shaping to pass CISPR-32 Class B conducted EMI without Y-cap increase.

Use Value: Reduces EMI filter BOM cost by ±3.5% frequency dithering and integrated slope compensation - eliminates external ramp generator.

Switching Chargers

Industrial SMPS

Use Scenario: USB PD-compliant charger with adaptive voltage output and multi-protocol support.

IC Role / Device Role / Timing Role: Flyback controller delivering regulated 5–20V output via secondary-side feedback; uses PRO pin for input OVP coordination with primary-side sensing.

Use Value: PRO pin hysteresis (0.2 V) and VCC OVP (21–25 V) enable safe 265VAC surge handling without external crowbar, improving reliability in unregulated grids.

Use Scenario: DIN-rail mounted 24V industrial power supply with extended temperature range (-40°C to +105°C).

IC Role / Device Role / Timing Role: Robust flyback controller operating across full junction temperature range with thermal shutdown (150°C) and recovery (110°C) hysteresis.

Use Value: SOIC8 package with θ_JA = 96 °C/W and internal OTP ensures continuous operation in 70°C ambient enclosures without forced air cooling.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
UCC28740DR	Fixed-frequency quasi-resonant controller with valley-switching; no FSET pin; higher start-up current (50 μA).	Requires resonant transformer design; better light-load efficiency but less predictable EMI than HFC0310GS-P's dithered fixed frequency.	Select for ultra-low no-load power (<100mW) where transformer cost is secondary to efficiency.
ICE2QS03G	Current-mode controller with integrated 650V MOSFET; no external FSET; lower max frequency (500 kHz); no PRO pin.	Limited to lower-power designs (<15W); lacks external protection interface and frequency shaping capability.	Select for cost-sensitive, single-chip solutions below 12W with minimal external components.

Compared with UCC28740DR and ICE2QS03G, the HFC0310GS-P uniquely combines programmable fixed frequency, frequency shaping, and a dedicated PRO pin - making it optimal for EMI-constrained, multi-protection industrial adapters requiring design flexibility and thermal resilience.

Availability

HFC0310GS-P is available at Aetrix Electronics and suitable for AC/DC adapters, power meters, and industrial SMPS requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.

Supply support for HFC0310GS-P 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 analog and power ICs, headquartered in Kirkland, WA, with global design and support centers.

The HFC0310 belongs to MPS's AC/DC flyback controller product line, engineered for high-efficiency, low-EMI isolated power conversion in energy-metering, industrial, and consumer adapter applications.

FAQ

What is the minimum FSET capacitor value required for 600 kHz operation?

The FSET capacitor value is calculated using f_S = I_FSET / (C × V_FSETmax). With I_FSET = 60 μA (max) and V_FSETmax = 0.92 V (max), C = 60 μA / (600 kHz × 0.92 V) ≈ 109 pF. A 120 pF NP0 ceramic capacitor is recommended for stability and temperature drift margin.

How does the PRO pin interact with VCC UVLO during fault conditions?

When VCC reaches VCCH (10.8–13.2 V), the PRO pin becomes active. If PRO voltage exceeds 3.1–3.5 V, the IC shuts down immediately. During VCC UVLO recovery, PRO remains monitored only after VCC rises above VCCH - preventing premature restart during brownout transitions.

Can the HFC0310GS-P operate without an external FSET capacitor?

Yes. Without an FSET capacitor, the HFC0310GS-P defaults to its internal frequency-shaping mode, which dithers switching frequency by ±3.5% to reduce EMI peaks. This mode eliminates the need for external timing components but fixes the nominal frequency at approximately 100 kHz.

What is the purpose of the dual leading-edge blanking times (tLEB1 and tLEB2)?

tLEB1 (180–400 ns) blanks CS during normal switching to ignore turn-on spikes; tLEB2 (150–370 ns) applies during short-circuit detection to allow faster fault response. This separation ensures noise immunity during steady-state operation while preserving SCP speed under fault.

Does the HFC0310GS-P support synchronous rectification?

No. The HFC0310GS-P is a primary-side controller only and does not provide timing or drive signals for secondary-side synchronous rectifiers. It relies on standard diode rectification or requires external SR controller ICs like MP6908 for synchronous operation.

How is over-load protection (OLP) triggered and recovered?

OLP triggers when FB voltage exceeds 3.5–4.0 V for 8192 consecutive switching cycles. After shutdown, recovery occurs automatically when FB drops below 0.66–0.80 V (burst-exit threshold) - no external latch or reset signal is needed.

What is the maximum allowable VCC voltage during transient events?

The absolute maximum VCC rating is 30 V, but over-voltage protection activates at 21–25 V. Sustained operation above 25 V risks permanent damage; the OVP circuit clamps conduction and initiates auto-recovery once VCC falls below 5.8–7.0 V (recharge level).

HFC0310GS-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Isolation:: Isolated

Internal Switch(s):: No

Voltage - Breakdown:: -

Topology:: Flyback

Voltage - Start Up:: -

Voltage - Supply (Vcc/Vdd):: 11V ~ 20V

Duty Cycle:: -

Frequency - Switching:: 600kHz

Power (Watts):: -

Fault Protection:: Over Load, Over Temperature, Over Voltage, Short Circuit, UVLO

Control Features:: Frequency Control, Soft Start

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Supplier Device Package:: 8-SOIC

Mounting Type:: Surface Mount

HFC0310GS-P FAQ

1.How can I place an order for HFC0310GS-P through Aetrix?

Please submit a Request for Quotation (RFQ) for HFC0310GS-P on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for HFC0310GS-P reliable?

The price and inventory of HFC0310GS-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HFC0310GS-P is usually 5 days.

3.What payment methods are accepted for HFC0310GS-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HFC0310GS-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HFC0310GS-P?

HFC0310GS-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HFC0310GS-P order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for HFC0310GS-P?

For technical support, including HFC0310GS-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HFC0310GS-P requirements.

6.How does Aetrix verify that HFC0310GS-P is sourced from the original manufacturer or authorized distributors?

All HFC0310GS-P products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HFC0310GS-P meets industry standards.

7.What is the process for return or replacement of HFC0310GS-P?

All HFC0310GS-P units undergo pre-shipment inspection (PSI). If there is an issue with HFC0310GS-P, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The HFC0310GS-P part is unused and in its original packaging.

Return procedure for HFC0310GS-P:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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