STMicroelectronics VIPER100SP13TR

Overview

VIPER100SP13TR from STMicroelectronics is a high-voltage, current-mode PWM controller with integrated 620 V/3 A vertical power MOSFET, designed for primary-side offline SMPS up to 50 W in universal input (85–265 VAC) configurations. It features adjustable switching frequency up to 100 kHz (typ.), internal 13 V VDD regulation, undervoltage lockout with 3 V hysteresis, and burst-mode operation enabling <1 W standby consumption per Blue Angel requirements.

For engineers reviewing the VIPER100SP13TR datasheet, VIPER100SP13TR pinout, VIPER100SP13TR application, or VIPER100SP13TR equivalent, key selection considerations include its integrated start-up current source, 250 ns blanking time, 1.7 µs shutdown delay, 2.5 Ω R_DS(on), and PENTAWATT HV package compatibility with snubberless flyback designs.

Technical Context

The VIPER100SP13TR implements a fixed-frequency current-mode control architecture with inner current-sense loop and outer transconductance error amplifier feedback via the COMP pin. Its oscillator uses an external R_t-C_t network, delivering stable 90–110 kHz operation across VDD = 9–15 V with ±1% resistor and ±5% capacitor tolerance.

It integrates a 620 V rated power MOSFET with 2.5 Ω typical R_DS(on) at T_j = 100 °C, avalanche-rated for 2 A repetitive pulses, and includes thermal shutdown at 140–170 °C with 40 °C hysteresis. The device supports both primary- and secondary-side regulation via VDD biasing and COMP pin interface to optocoupler networks.

Key Specifications

Pinout & Package

Package: PENTAWATT HV (022Y), 5-pin, thermally enhanced through-hole package with isolated heatsink tab (Drain-connected). Thermal resistance R_thj-case = 1.4 °C/W enables 82 W dissipation at T_c = 25 °C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar primary-side SMPS controller applications.

Compared with ICE2QS03G and VIPER06XS, VIPER100SP13TR uniquely combines 620 V ruggedness, integrated start-up, and certified sub-1 W standby in one PENTAWATT HV package-enabling complete 50 W flyback solutions with ≤12 components.

Availability

VIPER100SP13TR is available at Aetrix Electronics and suitable for AC-DC adapters, smart home power supplies, industrial sensor PSUs, and white goods auxiliary supplies requiring stable component supply and long-term industrial lifecycle support.

Supply support for VIPER100SP13TR 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, specializing in power management, microcontrollers, and analog ICs for industrial, automotive, and consumer markets.

VIPER™ is ST's proprietary family of high-voltage off-line power converters integrating control logic and power MOSFETs on a single die using VIPower M0 technology-designed specifically for cost-sensitive, space-constrained AC-DC conversion up to 100 W.

FAQ

What is the maximum continuous output power achievable with VIPER100SP13TR in a universal-input flyback?

The VIPER100SP13TR supports up to 50 W continuous output power in wide-range (85–265 VAC) flyback configurations, validated per ST's application note AN2369. This assumes proper heatsinking (T_c ≤ 70 °C), 2.5 Ω R_DS(on) derating, and use of the integrated 620 V MOSFET with snubberless layout. Higher outputs (e.g., 100 W) require doubler configuration or single-range input only.

Does VIPER100SP13TR support primary-side regulation without an optocoupler?

Yes. VIPER100SP13TR supports primary-side regulation by clamping VDD to 13 V using an auxiliary winding and zener diode. When VDD exceeds 13 V, the internal error amplifier saturates, pulling COMP low to reduce duty cycle-enabling regulation without optocoupler or secondary-side feedback components, as shown in Figure 16 of the datasheet.

How does the internal blanking time prevent false current-limit triggering?

The 250–360 ns blanking window disables the current-sense comparator immediately after MOSFET turn-on, suppressing false trips caused by transformer leakage inductance spikes and secondary rectifier reverse-recovery current. This ensures accurate peak-current detection begins only after parasitic transients settle, maintaining stable regulation across line/load variations.

Can VIPER100SP13TR be synchronized to an external clock signal?

Yes. The OSC pin accepts external TTL/CMOS clock signals up to 200 kHz. When driven externally, the internal oscillator is disabled and switching follows the applied clock edge-enabling EMI reduction via spread-spectrum synchronization or precise timing alignment in multi-rail systems, as detailed in Figure 23 of the datasheet.