Power Monitoring Unit (PMU)

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Power monitoring is a critical function to enable the highest efficiency in data and networking centers. By combining and analyzing environmental data and power metering data, installation managers can adapt data center cooling systems to ensure that all the machines are always running at the optimal temperature for highest efficiency. Ensuring servers are running at the correct temperature also increases their lifespan while lowering the power they consume and the heat that they generate.

ST’s product portfolio brings added value to system power monitoring applications. We provide key components for power management units, such as power metering ICs, a broad range of microcontrollers, and environmental sensors, as well as power management components for the whole system.

Part Number	Description
EVALSTPM32	Single-phase energy metering evaluation board with shunt current sensor based on the STPM32	Quick view Key Features 0.2% accuracy single-phase meter V_nom (RMS) = 140 to 300 V, I_nom /I_max(RMS) = 5/100 A, f_lin = 50/60 Hz ± 10% Connector for USB isolated hardware programmer tool STEVAL-IPE023V1 and PC GUI RS232 and UART isolated connectors to PC GUI SPI/UART switch for device peripheral selection 2 programmable LEDs on board Digital expansion to external system-on-chip or MCU 3.3 V power supply: external or through STEVAL-IPE023V1 isolated USB board IEC61000 standard compliant RoHS compliant Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
STEVAL-ISA135V1	4 W, 12 V output, isolated flyback converter using VIPer™ Plus - VIPER06HS	Quick view Key Features AC main input voltage: V_IN 85 V_AC - 265 V_AC Main frequency: f_L 50 Hz - 60 Hz Output voltage: V_OUT 12 V Max output current: I_OUT 333 mA Precision of output regulation: ΔV_{OUT_LF} ±5 % High frequency output voltage ripple: ΔV_{OUT_HF} 50 mV Min active mode efficiency: η_AV 71 % Max ambient operating temperature: T_AMB 60 ºC Thermal shutdown with hysteresis Delayed overload protection Open loop failure protection (if auxiliary winding is used) RoHS compliant Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
STEVAL-ISA125V1	5 V/10 W, 60 kHz isolated flyback with extra power management based on the VIPer28L	Quick view Key Features Input voltage range: 90 V_RMS - 265 V_RMS Output voltage: 5 V Max output current: I_OUT max = 2 A Peak output current: I_OUT pk = 3 A Precision of output regulation: ΔV_{OUT_LF} ±5% High frequency output voltage ripple: ΔV_{OUT_HF} = 50 mV Max ambient operating temperature: T_A = 60 ºC 800 V avalanche-rugged power section PWM operation at 60 kHz with frequency jittering for lower EMI Limiting current with adjustable set point On-board soft-start Safe auto-restart after a fault condition; low standby power (< 50 mW at 265 V_ac ). Adjustable, accurate overvoltage protection, thermal shutdown with hysteresis, delayed overload protection Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
STEVAL-ISA134V1	12 V - 4 W, 115 kHz isolated flyback based on the VIPer06	Quick view Key Features AC main input voltage V_IN : 85 V_AC - 265 V_AC Main frequency f_L : 50 Hz; 60 Hz Output voltage V_OUT : 12 V Max output current I_OUT : 333 mA Precision of output regulation ΔV_{OUT_LF} : ± 5% High frequency output voltage ripple: ΔV_{OUT_HF} 50 mV Min active mode efficiency ηAV = 71% Max ambient operating temperature: T_AMB = 60 °C Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
STEVAL-ISA117V1	Wide range isolated flyback demonstration board, single output 12 V/4.2 W based on the VIPer16LN	Quick view Key Features Universal input mains range: input voltage 90 - 264 V_AC frequency 45 - 65 Hz Single output voltage: 12 V at 0.35 A continuous operation Stand-by mains consumption: < 30 mW at 230 V_AC Average efficiency: > 75 % Fully protected against faults (overload, feedback disconnection and overheating) EMI: according to EN55022-Class-B Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber

Part Number

EVALSTPM32

Single-phase energy metering evaluation board with shunt current sensor based on the STPM32

Quick view

Key Features

0.2% accuracy single-phase meter
V_nom (RMS) = 140 to 300 V, I_nom /I_max(RMS) = 5/100 A, f_lin = 50/60 Hz ± 10%
Connector for USB isolated hardware programmer tool STEVAL-IPE023V1 and PC GUI
RS232 and UART isolated connectors to PC GUI
SPI/UART switch for device peripheral selection
2 programmable LEDs on board
Digital expansion to external system-on-chip or MCU
3.3 V power supply: external or through STEVAL-IPE023V1 isolated USB board
IEC61000 standard compliant
RoHS compliant

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

STEVAL-ISA135V1

4 W, 12 V output, isolated flyback converter using VIPer™ Plus - VIPER06HS

Quick view

Key Features

AC main input voltage: V_IN 85 V_AC - 265 V_AC
Main frequency: f_L 50 Hz - 60 Hz
Output voltage: V_OUT 12 V
Max output current: I_OUT 333 mA
Precision of output regulation: ΔV_{OUT_LF} ±5 %
High frequency output voltage ripple: ΔV_{OUT_HF} 50 mV
Min active mode efficiency: η_AV 71 %
Max ambient operating temperature: T_AMB 60 ºC
Thermal shutdown with hysteresis
Delayed overload protection
Open loop failure protection (if auxiliary winding is used)
RoHS compliant

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

STEVAL-ISA125V1

5 V/10 W, 60 kHz isolated flyback with extra power management based on the VIPer28L

Quick view

Key Features

Input voltage range: 90 V_RMS - 265 V_RMS
Output voltage: 5 V
Max output current: I_OUT max = 2 A
Peak output current: I_OUT pk = 3 A
Precision of output regulation: ΔV_{OUT_LF} ±5%
High frequency output voltage ripple: ΔV_{OUT_HF} = 50 mV
Max ambient operating temperature: T_A = 60 ºC
800 V avalanche-rugged power section
PWM operation at 60 kHz with frequency jittering for lower EMI
Limiting current with adjustable set point
On-board soft-start
Safe auto-restart after a fault condition; low standby power (< 50 mW at 265 V_ac ).
Adjustable, accurate overvoltage protection, thermal shutdown with hysteresis, delayed overload protection

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

STEVAL-ISA134V1

12 V - 4 W, 115 kHz isolated flyback based on the VIPer06

Quick view

Key Features

AC main input voltage V_IN : 85 V_AC - 265 V_AC
Main frequency f_L : 50 Hz; 60 Hz
Output voltage V_OUT : 12 V
Max output current I_OUT : 333 mA
Precision of output regulation ΔV_{OUT_LF} : ± 5%
High frequency output voltage ripple: ΔV_{OUT_HF} 50 mV
Min active mode efficiency ηAV = 71%
Max ambient operating temperature: T_AMB = 60 °C

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

STEVAL-ISA117V1

Wide range isolated flyback demonstration board, single output 12 V/4.2 W based on the VIPer16LN

Quick view

Key Features

Universal input mains range:
- input voltage 90 - 264 V_AC
- frequency 45 - 65 Hz
Single output voltage: 12 V at 0.35 A continuous operation
Stand-by mains consumption: < 30 mW at 230 V_AC
Average efficiency: > 75 %
Fully protected against faults (overload, feedback disconnection and overheating)
EMI: according to EN55022-Class-B