My Inquiry
My Account
Monolithic Power Systems Inc. HF920BGSE-P
- Part No.:
- HF920BGSE-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- AC DC Converters, Offline Switches
- Package:
- 8-SOIC (0.154", 3.90mm Width), 7 Leads
- Datasheet:
-
HF920BGSE-P.pdf
- Description:
- 900V, FIXED-FREQUENCY, EMI-OPTIM
- Quantity:
- Payment:
- Shipping:
Inventory:500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
HF920BGSE-P from Monolithic Power Systems is a monolithic 900V flyback switching regulator IC with integrated MOSFET, programmable frequency up to 150kHz, EMI-optimized jittering and frequency doubling, and <30mW no-load consumption. It delivers stable AC/DC power conversion for smart meters, industrial controls, and large appliances operating across 85–420VAC input.
For engineers reviewing the HF920BGSE-P datasheet, HF920BGSE-P pinout, HF920BGSE-P application, or HF920BGSE-P equivalent, key selection criteria include its 900V/15Ω integrated MOSFET, burst-mode standby efficiency, VCC UVLO hysteresis (4V), FB-based OLP threshold (3.65V), and SOIC8-7A package thermal resistance (96°C/W).
Technical Context
The HF920BGSE-P implements peak current-mode control with internal slope compensation and leading-edge blanking (tLEB1 = 385ns) to ensure stable loop dynamics and noise immunity. Its proprietary 900V monolithic process integrates OTP, OVP, SCP, and time-based OLP on-die-enabling single-chip protection without external latches or timers.
EMI mitigation is achieved via ±3.5% frequency jittering and optional frequency doubling (enabled by 1nF capacitor on FSET), allowing radiated emissions to be shifted away from PLC bands. The IC enters active burst mode below VBURL = 0.5V on FB, reducing switching loss while maintaining regulation via FB voltage hysteresis (VBURH − VBURL = 0.2V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Integrated MOSFET | 900V breakdown, 15Ω RDS(ON) at 25°C - enables direct connection to 420VAC rectified bus without external HV FET |
| Switching frequency | Programmable up to 150kHz via FSET resistor - allows EMI tuning and transformer size optimization |
| No-load consumption | <30mW - meets stringent global energy standards (e.g., EU CoC Tier 2, DOE Level VI) |
| VCC UVLO hysteresis | 4V (VCCH − VCCL) - ensures reliable start-up and brown-out recovery in fluctuating AC grids |
| FB OLP threshold | 3.65V (typical) - triggers auto-restart OLP after 8192 cycles, preventing thermal runaway under sustained overload |
| Thermal shutdown | 150°C with 30°C hysteresis - precise on-die OTP eliminates need for external thermistors or PCB copper sensing |
| Frequency jittering | ±3.5% deviation over 256-cycle carrier - spreads spectral energy to reduce peak EMI by >10dB |
Pinout & Package
HF920BGSE-P is housed in an SOIC8-7A package with exposed GND pad for thermal dissipation (θJA = 96°C/W). Pin 1 is VCC; Pin 2 is FSET; Pin 3 is PRO; Pin 4 is FB; Pins 5–6 and 8 are GND; Pin 7 is S; Pin 8 is D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | IC power supply input | Accepts 10–24V; powers internal circuitry after start-up; UVLO hysteresis enables robust grid cycling |
| 2 (FSET) | Frequency programming & doubling control | Resistor-to-GND sets fSW; parallel 1nF enables frequency doubling during overload to maintain regulation under magnetizing interference |
| 3 (PRO) | External fault input | Hysteresis-based shutdown (VPRO = 3.1V); supports auto-restart after fault removal - used for input OVP or system-level thermal monitoring |
| 4 (FB) | Feedback and protection sense | Regulates output via optocoupler; detects burst entry (0.5V), OLP (3.65V), and soft-start completion |
| 5–6, 8 (GND) | Signal and power ground reference | Multi-pin GND reduces ground bounce; requires 3cm² copper pour for thermal performance per datasheet layout guidance |
| 7 (S) | Current-sense input | Connects to source of internal MOSFET; senses primary current with LEB (385ns) to reject turn-on spikes |
| 8 (D) | Drain of integrated MOSFET | High-voltage node rated to +900V; supplies start-up current (2mA typical) from rectified AC bus |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic 900V MOSFET | Eliminates external HV switch and gate driver, reducing BOM count and layout complexity in offline SMPS |
| Active burst mode | Reduces switching loss at light load while maintaining regulated output - achieves <30mW no-load consumption |
| Frequency doubling mode | Doubles fSW when VFB ≥ VOLP, enabling operation with up to 50% lower transformer inductance under magnetic interference |
| On-die OTP with 30°C hysteresis | Provides precise thermal shutdown and recovery without external components - improves reliability in sealed enclosures |
| Internal soft-start (6.7ms) | Gradually increases peak current limit and fSW to minimize inrush stress on transformer and output diode |
Applications
| Smart Meter Power Supply | Industrial PLC Power Module |
|---|---|
Use Scenario: Primary-side AC/DC converter powering metrology ICs, RTC, and RF transceivers in DIN-rail smart meters. IC Role / Device Role / Timing Role: Offline flyback controller regulating isolated 12.5V/300mA output from 85–420VAC input; provides burst-mode standby for battery backup compliance. Use Value: <30mW no-load consumption extends battery life during mains failure; EMI jittering avoids interference with PLC communication on same power line. | Use Scenario: Auxiliary power supply for programmable logic controller (PLC) backplane, powering I/O modules and fieldbus interfaces. IC Role / Device Role / Timing Role: High-reliability flyback regulator delivering 13.5V/300mA with OLP, SCP, and OTP - operates continuously in 50°C ambient industrial cabinets. Use Value: Integrated 900V MOSFET withstands 420VAC surges; SOIC8-7A package with 3cm² copper pour sustains 6.5W output at TA = 50°C per datasheet test conditions. |
| Large Appliance Control Board | Home Automation Gateway PSU |
Use Scenario: Mains-powered auxiliary supply for washing machine control board, driving MCU, display, and motor drivers. IC Role / Device Role / Timing Role: Fixed-frequency flyback controller with frequency doubling to handle transformer inductance drift caused by nearby motors or solenoids. Use Value: Frequency doubling maintains regulation under 50% inductance drop; built-in LEB prevents false triggering during high di/dt events from motor commutation. | Use Scenario: Compact, low-EMI power supply for home gateway supporting Zigbee, Thread, and Wi-Fi radios alongside PLC backhaul. IC Role / Device Role / Timing Role: EMI-optimized flyback IC with ±3.5% jittering and programmable fSW - shifts switching noise away from 2.4GHz ISM and CENELEC A/B PLC bands. Use Value: Jittering reduces filter component count and cost; PRO pin enables coordinated shutdown during radio transmit bursts to avoid supply droop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar offline flyback regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP101GSE-Z | 700V integrated MOSFET, no frequency doubling, higher no-load consumption (~55mW) | Limited to ≤265VAC inputs; lacks EMI mitigation features for PLC-critical designs | Select when cost sensitivity outweighs EMI requirements and input voltage stays below 265VAC |
| UCC28881DR | 800V MOSFET, fixed 66kHz fSW, no jittering or burst mode, higher IQ (1.2mA) | Designed for constant-frequency operation only; unsuitable for ultra-low standby or narrowband EMI suppression | Choose for legacy TI ecosystem compatibility where jittering and <30mW are not required |
Compared with MP101GSE-Z and UCC28881DR, HF920BGSE-P uniquely combines 900V rating, programmable jittering, frequency doubling, and sub-30mW standby - making it the only option qualified for 420VAC smart meter and industrial PLC applications demanding both surge resilience and EMI coexistence.
Availability
HF920BGSE-P is available at Aetrix Electronics and suitable for smart meter design, industrial PLC power modules, and large appliance control boards requiring stable component supply across extended temperature and high-voltage AC input ranges.
Supply support for HF920BGSE-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 power management ICs, with over two decades of leadership in monolithic HV integration and EMI-optimized switching regulators.
The HF920B product line was designed specifically for high-reliability, wide-input AC/DC conversion in utility-grade and industrial equipment - emphasizing integrated protection, ultra-low standby, and coexistence with power-line communication systems.
FAQ
What is the maximum continuous output power for HF920BGSE-P in SOIC8-7A at 230VAC ±15%?
The HF920BGSE-P delivers up to 9.5W continuous output power in SOIC8-7A package at 230VAC ±15%, measured with TA = 50°C, single 12.5V output, and GND connected to 3cm² copper area. This rating assumes optimal heatsinking and BCM operation at minimum input voltage per datasheet Table 1.
How does frequency doubling mode improve robustness against magnetic interference?
Frequency doubling activates when FB voltage reaches the OLP threshold (3.65V), doubling the switching frequency to maintain regulation even if transformer inductance drops by up to 50% due to external magnetic fields. This prevents output collapse in environments with motors, solenoids, or adjacent power converters.
Can HF920BGSE-P operate without an optocoupler for feedback?
No - HF920BGSE-P requires an optocoupler-connected feedback network on the FB pin to regulate output voltage. The FB pin senses secondary-side voltage via optocoupler transfer ratio (KDIV = 3.7), and internal circuitry uses this signal for burst mode, OLP, and soft-start control.
What is the purpose of the dual leading-edge blanking (LEB) times tLEB1 and tLEB2?
tLEB1 (385ns) blanks the primary current-sense comparator during MOSFET turn-on to prevent false overcurrent trips from parasitic spikes; tLEB2 (350ns) blanks the short-circuit protection comparator separately, ensuring SCP remains responsive to true fault conditions while rejecting transient noise.
Is the PRO pin compatible with open-drain or push-pull external protection circuits?
The PRO pin accepts either configuration: it triggers shutdown when pulled above 3.1V with hysteresis, and resumes operation when voltage falls below 2.9V. External circuits may use open-drain N-channel MOSFETs or push-pull comparators - both are validated in MPS application notes for input OVP and system thermal monitoring.
Does HF920BGSE-P support synchronous rectification on the secondary side?
No - HF920BGSE-P is a primary-side controller only and does not provide gate drive signals for synchronous rectifiers. Secondary-side rectification must use standard Schottky or fast-recovery diodes; the IC regulates output via optocoupler feedback to the FB pin.
HF920BGSE-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width), 7 Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Isolated
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 900V
- Topology:
- Flyback
- Voltage - Start Up:
- 4 V
- Voltage - Supply (Vcc/Vdd):
- 10V ~ 24V
- Duty Cycle:
- 83%
- Frequency - Switching:
- Up to 150kHz
- Power (Watts):
- 9.5 W
- Fault Protection:
- Current Limiting, Over Load, Over Temperature, Short Circuit
- Control Features:
- Frequency Control
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC-7A
- Mounting Type:
- Surface Mount
HF920BGSE-P FAQ
1.How can I place an order for HF920BGSE-P through Aetrix?
Please submit a Request for Quotation (RFQ) for HF920BGSE-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 HF920BGSE-P reliable?
The price and inventory of HF920BGSE-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HF920BGSE-P is usually 5 days.
3.What payment methods are accepted for HF920BGSE-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HF920BGSE-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HF920BGSE-P?
HF920BGSE-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HF920BGSE-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 HF920BGSE-P?
For technical support, including HF920BGSE-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HF920BGSE-P requirements.
6.How does Aetrix verify that HF920BGSE-P is sourced from the original manufacturer or authorized distributors?
All HF920BGSE-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 HF920BGSE-P meets industry standards.
7.What is the process for return or replacement of HF920BGSE-P?
All HF920BGSE-P units undergo pre-shipment inspection (PSI). If there is an issue with HF920BGSE-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 HF920BGSE-P part is unused and in its original packaging.
Return procedure for HF920BGSE-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HF920BGSE-P Tags
-
LNK6407D-TL
Power Integrations
-
LNK3204D-TL
Power Integrations
-
SR10LG-G
Microchip Technology
-
TNY285DG-TL
Power Integrations
-
LNK304DN-TL
Power Integrations
-
TNY285KG-TL
Power Integrations
-
LNK3206D-TL
Power Integrations
-
LNK623DG-TL
Power Integrations
-
TNY286PG
Power Integrations
-
LNK624DG-TL
Power Integrations
-
LNK604DG-TL
Power Integrations
-
UCC28704DBVR-1
Texas Instruments
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
