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STMicroelectronics VIPER113LSTR
- Part No.:
- VIPER113LSTR
- Manufacturer:
- STMicroelectronics
- Category:
- AC DC Converters, Offline Switches
- Package:
- 10-SOP (0.154", 3.90mm Width)
- Datasheet:
-
VIPER113LSTR.pdf
- Description:
- IC OFFLINE SW MULT TOP 10SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,756
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Product details
Overview
VIPER113LSTR from STMicroelectronics is a high-voltage offline PWM controller IC integrating an 800 V avalanche-rugged N-channel MOSFET, current-mode control, and HV startup circuitry. It delivers up to 6 W in open-frame designs at 50 °C ambient, supports flyback/buck/buck-boost topologies, and operates with 60 kHz ±7% jittered switching frequency for EMI reduction. Designed for low-power SMPS in home appliances and industrial controls, it achieves <10 mW no-load input power at 230 VAC.
For engineers reviewing the VIPER113LSTR datasheet, VIPER113LSTR pinout, VIPER113LSTR application, or VIPER113LSTR equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and protection behavior, and real-world design implications for energy-efficient offline converters.
Technical Context
The VIPER113LSTR implements a current-mode PWM controller with integrated 800 V MOSFET and embedded sense-FET for lossless primary-side current sensing. Its oscillator generates a fixed 60 kHz nominal switching frequency with ±7% spread-spectrum jitter at 260 Hz to suppress conducted EMI peaks.
It features a transconductance error amplifier (1.2 V reference) with direct feedback capability, pulse-skipping protection to prevent flux-runaway during startup, and multi-level protections including overload/short-circuit (OLP), line/output overvoltage (OVP), VCC clamp (32.5 V typ.), and thermal shutdown (155 °C typ.).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Drain voltage rating | 800 V - Enables operation across universal AC input (85–265 VAC) without external snubber scaling. |
| Drain current limit | 370 mA - Sets peak primary current for ≤6 W output power in open-frame configurations at 50 °C. |
| Switching frequency | 60 kHz ±7% - Jittered frequency reduces EMI filter size and cost while maintaining stable regulation. |
| No-load input power | <10 mW at 230 VAC - Meets stringent EU CoC Tier 2 and DOE Level VI standby efficiency requirements. |
| VCC operating range | 4.5 V to 30 V - Supports self-supply from auxiliary winding or external bias, enabling flexible topology choices. |
| Thermal shutdown | 155 °C typical - Protects against sustained overload or poor heatsinking in enclosed adapters. |
| Soft-start time | 8 ms typical - Gradually ramps current limit to prevent inrush stress on transformer and output capacitor. |
Pinout & Package
Package: SSOP10 (3.9 mm × 4.9 mm, 0.65 mm pitch), thermally enhanced with drain pins (6–10) connected to internal MOSFET metal pad for PCB copper-area heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | MOSFET source & signal ground | Return path for bias currents; must be isolated from pulsed return paths to avoid noise coupling into control loop. |
| 2 VCC | Controller supply rail | Charged by internal HV current source at startup; requires ≥10 µF storage cap + 0.1 µF local bypass for stability. |
| 3 DIS | Disable input | Triggers auto-restart OVP protection when voltage exceeds 1.2 V for >1 ms; used for line/output overvoltage detection. |
| 4 FB | Error amplifier inverting input | Receives 1.2 V referenced feedback; enables direct regulation in non-isolated topologies or primary-side sensing via VCC divider. |
| 5 COMP | Error amplifier output | Drives current limit setpoint; in secondary-feedback designs, driven directly by optocoupler to close regulation loop. |
| 6–10 DRAIN | MOSFET drain terminals | High-voltage switching node; all five pins are internally bonded to same MOSFET die pad-must share large copper pour for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 800 V MOSFET | Eliminates need for external HV switch and gate driver, reducing BOM count and layout complexity in sub-10 W SMPS. |
| Jittered 60 kHz oscillator | Spreads spectral energy to lower peak EMI amplitude, enabling smaller input EMI filters and faster compliance testing. |
| Pulse-skipping protection | Prevents flux-runaway during startup by dynamically skipping cycles until inductor volt-second balance is achieved. |
| Embedded HV startup | Charges VCC capacitor directly from DRAIN via internal 800 V current source-no external startup resistor required. |
| Auto-restart protections | OLP, OVP, max duty cycle counter, and thermal shutdown all trigger safe restart after fault clearance-no manual reset needed. |
Applications
| Smart Home Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Powering ultra-low-power Zigbee/Z-Wave sensor nodes in battery-free wall switches and occupancy detectors. IC Role / Device Role / Timing Role: Primary-side regulated flyback controller providing isolated 3.3 V/50 mA output from 230 VAC mains. Use Value: Achieves <10 mW no-load consumption to meet EN 50564 standby limits while sustaining reliable wake-up signaling. |
Use Scenario: Generating 5 V/200 mA auxiliary supply for digital I/O conditioning circuits in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Buck-derived offline converter delivering tightly regulated rail with fast transient response to load steps from solenoid drivers. Use Value: Integrated soft-start and OLP enable robust cold-start under full capacitive load without output overshoot or latch-up. |
| LED Driver Control Boards | White Goods Appliance UI Panels |
|
Use Scenario: Supplying 12 V/150 mA bias for constant-current LED driver ICs in smart downlights and track lighting systems. IC Role / Device Role / Timing Role: Non-isolated buck converter using direct feedback from output to FB pin, eliminating optocoupler and TL431. Use Value: Reduces component count by 4 parts versus traditional isolated solution while maintaining ±5% output regulation across line/load. |
Use Scenario: Powering touch-controller and display interface boards in washing machines and dishwashers exposed to humid, vibration-prone environments. IC Role / Device Role / Timing Role: Open-frame flyback supplying 5 V/300 mA with reinforced isolation and thermal derating per IEC 60335-1. Use Value: 800 V MOSFET withstands surge transients up to 4 kV (line-earth), eliminating need for external MOV clamping in basic designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage offline controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICE2QS03G | 700 V MOSFET, fixed 65 kHz frequency (no jitter), no integrated HV startup - requires external resistor. | Limited to ≤230 VAC inputs; higher no-load power (~35 mW); less robust against surges. | Choose only if cost sensitivity outweighs surge immunity and efficiency requirements. |
| LNK306P | 725 V MOSFET, 66 kHz frequency, integrated X-cap discharge, but no direct feedback or pulse-skipping. | Requires optocoupler for regulation; lacks flux-runaway protection - risk of startup failure with large output caps. | Prefer when secondary-side regulation is mandatory and thermal margin is ample. |
Compared with ICE2QS03G and LNK306P, VIPER113LSTR offers superior surge tolerance (800 V), lower no-load consumption (<10 mW), and built-in pulse-skipping-making it optimal for compact, high-reliability, energy-certified designs where board space and thermal headroom are constrained.
Availability
VIPER113LSTR is available at Aetrix Electronics and suitable for smart home sensors, industrial PLC I/O modules, and LED driver control boards requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for VIPER113LSTR 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 microcontrollers, power ICs, and analog/mixed-signal devices for industrial, automotive, and consumer markets.
VIPER113LSTR belongs to the VIPerPlus family of high-voltage offline controllers, engineered specifically for cost-sensitive, space-constrained, energy-compliant AC/DC conversion in sub-12 W applications.
FAQ
What is the maximum continuous output power achievable with VIPER113LSTR in an open-frame design?
The VIPER113LSTR delivers up to 6 W continuous output power in open-frame configurations at 50 °C ambient temperature with adequate PCB copper heatsinking, as confirmed in Table 8 of DS11873 Rev 5. This assumes 230 VAC input, proper layout, and thermal management per Section 7.1 (SSOP10 package guidelines).
Can VIPER113LSTR operate without an optocoupler in isolated flyback designs?
No-VIPER113LSTR does not support primary-side regulation (PSR) without secondary feedback. For isolated flyback, an optocoupler must drive the COMP pin to close the regulation loop. Direct feedback (FB pin) is only valid in non-isolated topologies like buck or buck-boost where output shares ground with the IC.
How does the jittered oscillator reduce EMI in practical PCB layouts?
The 60 kHz ±7% jitter spreads harmonic energy across ~8.4 kHz bandwidth (±7% of 60 kHz), lowering peak amplitudes measured with average detection. This allows use of smaller common-mode chokes and X/Y capacitors-reducing filter size by ~30% versus fixed-frequency controllers in Class B conducted EMI tests.
What happens if the DIS pin is left floating during operation?
A floating DIS pin may cause erratic shutdown due to noise coupling, as the internal threshold is only 1.2 V. STMicroelectronics explicitly states in Section 1 that "if the disable function is not required, the DIS pin must be soldered to GND." Leaving it unconnected risks false triggering of auto-restart OVP protection.
VIPER113LSTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- VIPER™
- Package/Case:
- 10-SOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Non-Isolated
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 800V
- Topology:
- Buck, Buck-Boost, Flyback
- Voltage - Start Up:
- 16 V
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 30V
- Duty Cycle:
- 80%
- Frequency - Switching:
- 60kHz
- Power (Watts):
- 12 W
- Fault Protection:
- Current Limiting, Over Load, Over Voltage, Short Circuit
- Control Features:
- Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-SSOP
- Mounting Type:
- Surface Mount
VIPER113LSTR FAQ
1.How can I place an order for VIPER113LSTR through Aetrix?
Please submit a Request for Quotation (RFQ) for VIPER113LSTR 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 VIPER113LSTR reliable?
The price and inventory of VIPER113LSTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VIPER113LSTR is usually 5 days.
3.What payment methods are accepted for VIPER113LSTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VIPER113LSTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VIPER113LSTR?
VIPER113LSTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VIPER113LSTR 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 VIPER113LSTR?
For technical support, including VIPER113LSTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VIPER113LSTR requirements.
6.How does Aetrix verify that VIPER113LSTR is sourced from the original manufacturer or authorized distributors?
All VIPER113LSTR 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 VIPER113LSTR meets industry standards.
7.What is the process for return or replacement of VIPER113LSTR?
All VIPER113LSTR units undergo pre-shipment inspection (PSI). If there is an issue with VIPER113LSTR, 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 VIPER113LSTR part is unused and in its original packaging.
Return procedure for VIPER113LSTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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