Features
• Universal AC Main Input voltage range: 90 V
AC
to 264 V
AC
•
Output range: 5 V-3 A continuous operation
• Constant voltage (CV) and constant current (CC) operation with CC primary
sensing
• Output overvoltage and short-circuit protection
• Input power in standby <15 mW at 230 V
AC
• Intelligent power management to maximize efficiency over entire output power
range
• Compliant with stringent energy regulations
• EMI: According to EN55022-Class-B
• Small form factor: 44x35x15 mm
Description
The STEVAL-SMACH15V1 USB adapter evaluation board is based on the STCH03
offline PWM controller for low standby adapters. The controller can provide constant
output current (CC) regulation using primary sensing feedback.
The device combines a high-performance low-voltage PWM controller chip and a
650 V HV start-up cell in the same package. It also features extremely low quiescent
current and burst-mode management. These features help minimize residual input
consumption to less than 15 mW under no-load conditions.
The device offers output overvoltage protection (OVP) and over-temperature
protection (OTP). It also offers Hiccup-mode protection for when the transformer
saturates or the secondary diode fails short, and an output UVP protection that limits
the average output current when an output short circuit occurs.
The adapter satisfies energy saving recommendations (EuCoC rev. 5 – Tier 2 and
EPS of DOE USA) and EN55022-Class-B Conducted noise emissions.
The small form factor and the output USB connector renders the design suitable for
small USB chargers and adapters for mobile phones, tablets and other handheld
equipment.
Product summary
USB adapter
evaluation board
based on STCH03
offline PWM controller
STEVAL-
SMACH15V1
Offline PWM controller
for low standby
adapters
STCH03
Application category
Power
management
15 W 5 V output USB adapter evaluation board with STCH03 CC-mode primary
sensing switching controller
STEVAL-SMACH15V1
Data brief
DB3654 - Rev 1 - June 2018
For further information contact your local STMicroelectronics sales office.
www
.st.com
