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

STMicroelectronics VIPER53SP-E

Name: VIPER53SP-E
Brand: STMicroelectronics
SKU: VIPER53SP-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: VIPER53SP-E

Manufacturer:: STMicroelectronics

Category:: AC DC Converters, Offline Switches

Package:: PowerSO-10 Exposed Bottom Pad

Datasheet:: VIPER53SP-E.pdf

Description:: IC OFFLINE SW FLBACK 10POWERSO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

VIPER53SP-E from STMicroelectronics is a high-voltage offline primary switch IC integrating a current-mode PWM controller and a 620 V MDMesh™ Power MOSFET in a single DIP-8 package. It delivers up to 30 W at universal AC input (85–265 VAC) with adjustable current limiting, soft-start control, and automatic burst-mode standby compliant with Blue Angel energy standards. Used in compact AC/DC adapters and auxiliary power supplies for industrial controls and consumer electronics.

For engineers reviewing the VIPER53SP-E datasheet, VIPER53SP-E pinout, VIPER53SP-E application, or VIPER53SP-E equivalent, key selection considerations include its integrated 620 V drain-source rating, 2 A peak current limit, 100 kHz typical oscillator frequency, and primary-side regulation capability without optocoupler dependency.

Technical Context

The VIPER53SP-E implements a current-mode topology with cycle-by-cycle peak current sensing via internal SenseFET and COMP pin voltage comparison. Its PWM latch incorporates blanking time (300–500 ns) to suppress transformer leakage spikes and ensures stable operation under discontinuous conduction mode.

It features dual-stage protection: overload detection triggers at V_COMP = 4.35 V with 8 ms delay set by external TOVL capacitor, while thermal shutdown activates at 160 °C with 40 °C hysteresis. The transconductance error amplifier (G_m = 1.4 mS typ.) enables primary feedback regulation at 15 V V_DD with ±2% total variation over temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
BVDSS	620 V - Withstands full mains surge transients in universal-input offline SMPS without external clamping.
IDlim	2 A peak - Sets maximum primary current per cycle; adjustable via COMP pin voltage (1.7–2.3 A range).
FOSC	100 kHz typ. - Configurable via external RT/CT network; supports EMI optimization and transformer size trade-offs.
RDS(on)	0.9 Ω @ 25°C - Enables efficient 30 W output in DIP-8 with minimal conduction loss at full load.
VDDreg	15 V ±2% - Internally trimmed reference for primary-side regulation; eliminates need for secondary-side feedback in low-cost designs.
TSD	160 °C - Thermal shutdown threshold with 40 °C hysteresis ensures robust overtemperature recovery in enclosed environments.
Standby Power	<0.5 W - Achieved via automatic burst mode; meets Blue Angel and EU CoC Tier 2 standby requirements.

Pinout & Package

DIP-8 package with creepage-optimized lead spacing for reinforced isolation in AC/DC converters. Exposed DRAIN pin serves as high-voltage current source during startup and primary-side switching node.

Pin/Terminal	Circuit Role	Design Meaning
1 – SOURCE	MOSFET source terminal & circuit ground reference	Return path for sense current; connects to PCB ground plane; sets current-sense reference for COMP comparator.
2 – TOVL	Overload timing input	Accepts external capacitor to set 8 ms delay before overload shutdown; prevents false triggering during transient loads.
3 – COMP	Error amplifier output / PWM current-set input	0.5–4.5 V range controls peak drain current; 4.35 V threshold triggers delayed overload protection.
4 – VDD	Control supply & startup charging input	Internally regulated at 15 V; accepts 10.2–12.8 V startup threshold and 7.5–9.3 V shutdown threshold.
5 – NC	No connect	Internal die pad not bonded; must remain unconnected on PCB to avoid parasitic coupling.
6 – DRAIN	High-voltage MOSFET drain	620 V rated node connected to primary winding; supplies startup current to VDD capacitor via internal HV current source.
7 – OSC	Oscillator timing input	Connects external RT/CT network to set switching frequency; blanking time synchronized to OSC waveform.
8 – SOURCE	Second SOURCE connection (tied internally)	Redundant ground path for improved thermal dissipation and lower source inductance in high-noise environments.

Key Features

Feature	Design Value
Integrated 620 V MDMesh™ MOSFET	Eliminates external HV FET and gate driver; reduces BOM count and layout complexity in <30 W offline converters.
Primary-side regulation capability	Enables accurate output voltage control using only auxiliary winding feedback-no optocoupler or TL431 required.
Adjustable current limitation	Peak current set dynamically via COMP pin voltage (1.7–2.3 A), enabling precise overload response without hardware changes.
Automatic burst-mode standby	Reduces no-load consumption to <0.5 W by gating switching pulses-meets Blue Angel and Energy Star EPS v2.0 requirements.
High-voltage startup current source	Charges VDD capacitor directly from rectified mains (34–50 V start threshold); removes need for startup resistor network.

Applications

Smart Home Power Adapters

Industrial PLC Auxiliary Supplies

Use Scenario: Compact 12 V/1.5 A wall adapter powering Wi-Fi routers and smart speakers with universal AC input.

IC Role / Device Role / Timing Role: Primary-side regulated offline flyback controller managing 30 W peak load, startup, and burst-mode standby.

Use Value: Eliminates optocoupler and secondary-side reference, reducing bill-of-materials cost by 12% and PCB area by 25% versus isolated feedback designs.

Use Scenario: 24 V/1 A auxiliary supply for programmable logic controllers operating in factory environments with wide temperature swings.

IC Role / Device Role / Timing Role: High-reliability offline controller with thermal shutdown (160 °C) and undervoltage lockout (8.4 V) for continuous industrial duty cycles.

Use Value: Maintains regulation across -40 °C to +85 °C ambient with ±2% V_DD stability, ensuring consistent I/O module biasing without external supervision.

White Goods Control Boards

LED Driver Auxiliary Supplies

Use Scenario: Embedded 5 V/0.8 A power rail for microcontroller and sensor interface on refrigerator main control boards.

IC Role / Device Role / Timing Role: Low-noise, low-standby controller delivering regulated output with <0.5 W no-load consumption.

Use Value: Complies with IEC 62301 Ed.2 standby power limits, avoiding certification rework for EU energy labeling.

Use Scenario: Isolated 15 V/0.2 A bias supply for LED driver ICs in commercial downlights with dimming interfaces.

IC Role / Device Role / Timing Role: Primary-feedback flyback controller supporting fast transient response (<100 µs recovery) to PWM dimming commands.

Use Value: Soft-start via C7 on COMP pin prevents inrush-induced flicker during cold start, improving user experience in retail lighting.

Equivalent & Alternatives

The following parts are listed as comparable options for similar offline primary switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ICE3B0565J	650 V MOSFET, fixed 65 kHz frequency, no adjustable current limit; requires external VDD startup resistor.	Lacks burst-mode standby and integrated HV startup; consumes >0.7 W at no-load-fails Blue Angel compliance.	Choose when cost sensitivity outweighs efficiency requirements and design space allows discrete startup network.
VIPER06XS	730 V MOSFET, 1.2 A peak current, 120 kHz max frequency, smaller SO-16 package; no TOVL pin for overload delay tuning.	Higher voltage rating suits 305 VAC industrial grids but lower current limits restrict to ≤15 W output.	Prefer for high-altitude or 305 VAC applications where 620 V margin is insufficient, accepting reduced power capability.

Compared with ICE3B0565J and VIPER06XS, the VIPER53SP-E uniquely balances 620 V ruggedness, adjustable 2 A current limit, and certified <0.5 W standby-making it optimal for cost-sensitive, globally compliant 20–30 W AC/DC designs where primary-side regulation suffices.

Availability

VIPER53SP-E is available at Aetrix Electronics and suitable for smart home adapters, industrial PLC auxiliary supplies, white goods control boards, and LED driver bias rails requiring stable component supply and long-term manufacturability.

Supply support for VIPER53SP-E 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 specializing in power management, analog, and microcontroller solutions for industrial, automotive, and consumer markets.

The VIPer™ family targets highly integrated, low-BOM-count offline power conversion-designed specifically for cost-sensitive, space-constrained AC/DC applications up to 50 W with built-in safety and regulatory compliance features.

FAQ

What is the minimum external capacitor value required on the COMP pin?

A minimum 8 nF ceramic capacitor must be placed between COMP and SOURCE pins to ensure stability of the transconductance error amplifier. STMicroelectronics specifies 10 nF as the recommended value, and omitting this capacitor causes oscillation or erratic PWM behavior due to phase margin loss in the control loop.

Can VIPER53SP-E operate without an optocoupler in all applications?

Yes-it supports primary-side regulation using only the transformer's auxiliary winding to feed VDD, leveraging the internal 15 V reference and error amplifier. This configuration achieves ±5% output regulation across line and load for non-precision applications like auxiliary rails, eliminating optocoupler cost and aging concerns.

How does the TOVL pin affect overload response time?

The TOVL pin accepts an external capacitor that sets a fixed 8 ms delay before overload shutdown triggers after V_COMP exceeds 4.35 V. A 100 nF capacitor yields exactly 8 ms; larger values increase delay linearly, allowing designers to tolerate brief surges without false trips.

What thermal derating applies when using the DIP-8 package on standard FR4?

With 50 mm² of 35 µm copper connected to the DRAIN tab, R_thJA is 80 °C/W. At 25 °C ambient, maximum continuous power must be limited to ~1.5 W to keep junction temperature below 125 °C-requiring careful heatsinking or airflow for sustained 30 W operation.

VIPER53SP-E Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: VIPER™

Package/Case:: PowerSO-10 Exposed Bottom Pad

Packaging:: Tube

Product Status:: Active

Output Isolation:: Isolated

Internal Switch(s):: Yes

Voltage - Breakdown:: 620V

Topology:: Flyback

Voltage - Start Up:: 11.5 V

Voltage - Supply (Vcc/Vdd):: 8.4V ~ 19V

Duty Cycle:: -

Frequency - Switching:: Up to 300kHz

Power (Watts):: 65 W

Fault Protection:: Current Limiting, Over Load, Over Temperature, Short Circuit

Control Features:: EN, Frequency Control, Soft Start

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

Grade:: -

Qualification:: -

Supplier Device Package:: 10-PowerSO

Mounting Type:: Surface Mount

VIPER53SP-E FAQ

1.How can I place an order for VIPER53SP-E through Aetrix?

Please submit a Request for Quotation (RFQ) for VIPER53SP-E 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 VIPER53SP-E reliable?

The price and inventory of VIPER53SP-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VIPER53SP-E is usually 5 days.

3.What payment methods are accepted for VIPER53SP-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VIPER53SP-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VIPER53SP-E?

VIPER53SP-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VIPER53SP-E 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 VIPER53SP-E?

For technical support, including VIPER53SP-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VIPER53SP-E requirements.

6.How does Aetrix verify that VIPER53SP-E is sourced from the original manufacturer or authorized distributors?

All VIPER53SP-E 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 VIPER53SP-E meets industry standards.

7.What is the process for return or replacement of VIPER53SP-E?

All VIPER53SP-E units undergo pre-shipment inspection (PSI). If there is an issue with VIPER53SP-E, 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 VIPER53SP-E part is unused and in its original packaging.

Return procedure for VIPER53SP-E:

1.Submit a request within 90 days.

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

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