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STMicroelectronics VIPER12ADIP
- Part No.:
- VIPER12ADIP
- Manufacturer:
- STMicroelectronics
- Category:
- AC DC Converters, Offline Switches
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
VIPER12ADIP.pdf
- Description:
- IC OFFLINE SWITCH 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,261
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Product details
Overview
VIPER12ADIP from STMicroelectronics is a high-voltage, current-mode PWM controller with integrated 730 V Power MOSFET in DIP-8 package, designed for off-line SMPS primary-side switching. It delivers up to 8 W (European mains) or 5 W (wide-range 85–265 Vac), operates at fixed 60 kHz, supports 9–38 V VDD supply, and integrates undervoltage lockout with hysteresis (VDDon = 14.5 V, VDDoff = 8 V), overtemperature, overcurrent, and overvoltage protection with autorestart - used in battery charger adapters and TV standby supplies.
For engineers reviewing the VIPER12ADIP datasheet, VIPER12ADIP pinout, VIPER12ADIP application, or VIPER12ADIP equivalent, this device is selected for low-cost, compact AC/DC flyback converters requiring integrated HV start-up, burst-mode light-load efficiency, and self-protected operation without auxiliary bias winding during startup.
Technical Context
The VIPER12ADIP integrates a 730 V vertical Power MOSFET and current-mode PWM controller on a single die, enabling direct connection to rectified AC mains. Its internal high-voltage start-up current source (−1 mA typical) charges the VDD capacitor from the DRAIN pin until VDD reaches 14.5 V, then disables automatically.
Feedback is current-mode via the FB pin (0–1 V range), where peak drain current is linearly controlled by injected FB current (GID = 320 A/A); shutdown occurs at IFBsd = 0.9 mA. Protection includes thermal shutdown at 170 °C (40 °C hysteresis), VDD overvoltage latch at 42 V, and hiccup-mode OVP recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | Fixed 60 kHz ±6 kHz across temperature and VDD (0–35 V), enabling predictable EMI filtering and transformer design. |
| Drain-Source Voltage (BVDSS) | 730 V - supports direct connection to 265 Vac mains after bridge rectification (≈375 V DC peak) with margin. |
| VDD Operating Range | 9–38 V - accommodates wide auxiliary winding voltage variation and enables stable operation across load transients. |
| Peak Current Limit | 0.4 A typical - sets maximum primary current for 5–8 W output power in flyback topology with standard transformer turns ratio. |
| Thermal Shutdown Threshold | 170 °C with 40 °C hysteresis - prevents permanent damage during sustained overload or poor heatsinking; enables safe autorestart. |
| Start-up Current Source | −1 mA (typ.) from DRAIN to VDD - eliminates need for external high-voltage start-up resistor, reducing component count and no-load losses. |
| FB Pin Sensitivity | Current-input (0–3 mA range), not voltage - allows optocoupler-based secondary regulation without level-shifting or error amplifier biasing. |
Pinout & Package
DIP-8 package (Plastic Dual In-line Package, 9.02 × 7.62 mm body, 2.54 mm lead pitch), through-hole mountable, with creepage/clearance compliant for reinforced insulation in Class II AC/DC designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DRAIN) | Power MOSFET drain terminal and HV start-up current source input | Connects directly to rectified AC line; supplies internal start-up current until VDD reaches 14.5 V; carries full primary switching current. |
| 2 (DRAIN) | Drain tie-bar (internal parallel connection) | Internally bonded to Pin 1 for enhanced current handling and thermal conduction; must be connected to same PCB net. |
| 3 (FB) | Current-mode feedback input | Sinks current from optocoupler LED; 0–3 mA range controls peak drain current linearly; shutdown at >0.9 mA. |
| 4 (VDD) | Control circuit power supply and UVLO sense node | Powered by external capacitor charged via DRAIN; enables/disables switching at 14.5 V / 8 V thresholds with 6.5 V hysteresis. |
| 5 (SOURCE) | MOSFET source and control ground reference | Primary-side ground return for PWM logic and current sense; must be tied to power ground, not signal ground. |
| 6 (SOURCE) | Source tie-bar (internal parallel connection) | Internally bonded to Pin 5; improves thermal dissipation and reduces source inductance in high-frequency switching. |
| 7 (SOURCE) | Source tie-bar (internal parallel connection) | Third source pin for low-impedance grounding; all three SOURCE pins must be routed to same low-inductance ground plane. |
| 8 (SOURCE) | Source tie-bar (internal parallel connection) | Completes quad-source configuration; minimizes common-source inductance and improves current-mode stability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 730 V Power MOSFET + PWM controller | Reduces BOM count by eliminating external gate driver and discrete HV FET; enables <10 mm² primary-side footprint. |
| High-voltage start-up current source (−1 mA) | Removes need for 1 MΩ+ start-up resistor and associated power loss; cuts no-load consumption to <300 mW typical. |
| Burst-mode operation below 50 mA load | Extends light-load efficiency to <15% of full load; maintains regulation while reducing audible noise and standby power. |
| VDD UVLO with 6.5 V hysteresis (14.5 V / 8 V) | Prevents erratic restart during brownouts; ensures clean turn-on/turn-off sequencing independent of auxiliary winding regulation. |
| Hiccup-mode overvoltage protection (42 V threshold) | Limits fault energy during output short or optocoupler failure; auto-recovers after VDD drops to 8 V, avoiding latch-up. |
Applications
| Smartphone Charger Adapter | TV Standby Power Supply |
|---|---|
|
Use Scenario: Compact 5 W AC/DC adapter powering USB charging port with no-load requirement <150 mW. IC Role / Device Role / Timing Role: Primary-side PWM controller and power switch; regulates output via optocoupler feedback; fixed 60 kHz timing sets transformer size and EMI profile. Use Value: Integrated HV start-up and burst mode achieve <100 mW no-load consumption; DIP-8 simplifies manual assembly and meets IEC 62368 creepage requirements. |
Use Scenario: 3.3 V/100 mA standby rail for smart TV mainboard, active during sleep mode. IC Role / Device Role / Timing Role: Off-line flyback controller delivering isolated standby voltage; uses auxiliary winding for self-bias; 60 kHz frequency avoids AM radio band interference. Use Value: VDD 9–38 V range tolerates wide input ripple; thermal shutdown protects during prolonged standby; DIP-8 eases rework in high-mix manufacturing. |
| Motor Control Auxiliary Supply | IoT Gateway Wall Adapter |
|
Use Scenario: 12 V/200 mA auxiliary supply for gate drivers and MCU in industrial motor drive inverter. IC Role / Device Role / Timing Role: Isolated primary-side SMPS controller; provides galvanically separated bias for high-side IGBT drivers; fixed frequency enables predictable EMI filter design. Use Value: 730 V BVDSS withstands 400 V DC bus transients; overtemperature protection prevents latch-up during thermal stress events in enclosed enclosures. |
Use Scenario: UL-certified 5 W wall adapter powering Wi-Fi/BLE gateway with strict no-load and surge immunity requirements. IC Role / Device Role / Timing Role: Primary-switcher in compact flyback converter; implements current-mode control for tight cross-regulation across multiple outputs. Use Value: FB current-input interface simplifies secondary-side TL431 + optocoupler design; autorestart OVP meets UL 62368-1 fault tolerance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar primary-side SMPS controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LNK304P | 700 V MOSFET, 66 kHz variable frequency, no integrated start-up current source - requires external HV resistor. | Higher no-load power due to resistor bias; better light-load efficiency via frequency reduction but less predictable EMI. | Preferred when variable-frequency EMI spreading is required and board space allows external start-up network. |
| ICE2QS03G | 650 V MOSFET, 65 kHz fixed frequency, external oscillator, requires separate VDD supply - no HV start-up capability. | Needs auxiliary winding or dedicated bias supply from startup; higher system complexity but greater design flexibility. | Chosen when precise frequency control or multi-chip redundancy is needed, and cost-per-watt is secondary to design control. |
Compared with LNK304P and ICE2QS03G, VIPER12ADIP offers lowest BOM count and no-load power via integrated HV start-up and fixed-frequency simplicity, making it optimal for cost-sensitive, space-constrained 5–8 W adapters where predictable EMI and ease of certification are priorities.
Availability
VIPER12ADIP is available at Aetrix Electronics and suitable for smartphone charger adapters, TV standby power supplies, and motor control auxiliary supplies requiring stable component supply and long-term industrial availability.
Supply support for VIPER12ADIP 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
VIPER™ is ST's proprietary family of high-voltage offline SMPS controllers integrating power MOSFETs and protection features, engineered specifically for low-cost, high-reliability AC/DC conversion in sub-15 W applications.
FAQ
What is the maximum continuous output power achievable with VIPER12ADIP in a flyback design?
The VIPER12ADIP supports up to 8 W under European mains (195–265 Vac) and 5 W under universal input (85–265 Vac), based on thermal limits and derating curves in the datasheet. Output power depends on transformer design, PCB copper area (≥200 mm² for DIP-8), and ambient temperature; exceeding these values risks thermal shutdown at 170 °C junction temperature.
Can VIPER12ADIP operate without an auxiliary winding for VDD supply?
Yes - its integrated high-voltage start-up current source draws −1 mA from the DRAIN pin to charge the VDD capacitor, enabling initial startup without auxiliary winding. Once VDD reaches 14.5 V, the internal source disables and the device transitions to auxiliary-powered operation; however, the auxiliary winding is still required for sustained operation above light load.
How does the FB pin current control affect output regulation accuracy?
The FB pin responds to current (not voltage), with 0–3 mA controlling peak drain current linearly (GID = 320 A/A). Regulation accuracy depends on secondary-side optocoupler CTR tolerance and TL431 reference drift; typical output voltage regulation is ±5% over line/load/temperature, improved to ±3% with precision references and matched optocouplers.
Is VIPER12ADIP RoHS-compliant and halogen-free?
Yes - VIPER12ADIP (DIP-8 package) is RoHS-compliant per EU Directive 2011/65/EU and halogen-free per STMicroelectronics specification Doc ID14923, with lead-free matte tin termination and compliant molding compound. Full compliance documentation is available upon request from Aetrix Electronics.
VIPER12ADIP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- VIPER™
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Isolation:
- Non-Isolated
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 730V
- Topology:
- -
- Voltage - Start Up:
- 14.5 V
- Voltage - Supply (Vcc/Vdd):
- 9V ~ 38V
- Duty Cycle:
- -
- Frequency - Switching:
- 60kHz
- Power (Watts):
- 13 W
- Fault Protection:
- Current Limiting, Over Temperature, Over Voltage
- Control Features:
- -
- Operating Temperature:
- -40°C ~ 150°C (TC)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-DIP
- Mounting Type:
- Through Hole
VIPER12ADIP FAQ
1.How can I place an order for VIPER12ADIP through Aetrix?
Please submit a Request for Quotation (RFQ) for VIPER12ADIP 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 VIPER12ADIP reliable?
The price and inventory of VIPER12ADIP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VIPER12ADIP is usually 5 days.
3.What payment methods are accepted for VIPER12ADIP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VIPER12ADIP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VIPER12ADIP?
VIPER12ADIP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VIPER12ADIP 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 VIPER12ADIP?
For technical support, including VIPER12ADIP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VIPER12ADIP requirements.
6.How does Aetrix verify that VIPER12ADIP is sourced from the original manufacturer or authorized distributors?
All VIPER12ADIP 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 VIPER12ADIP meets industry standards.
7.What is the process for return or replacement of VIPER12ADIP?
All VIPER12ADIP units undergo pre-shipment inspection (PSI). If there is an issue with VIPER12ADIP, 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 VIPER12ADIP part is unused and in its original packaging.
Return procedure for VIPER12ADIP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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