This is information on a product in full production.
July 2015 DocID022218 Rev 3 1/35
VIPER37
VIPerPlus family: fixed frequency offline converter
Datasheet
-
production data
Figure 1. Typical topology
Features
• 800 V avalanche-rugged power MOSFET
allowing ultra wide range input V
ac
to b e
achieved
• PWM operation with adjustable limiting current
• 30 mW standby power at 265 V
ac
• Operating frequency:
– 60 kHz (L type), 115 kHz (H type)
• Frequency jittering for low EMC
• Output overvoltage protection
• High primary current protection (2
nd
OCP)
• Input undervoltage setting (brownout)
• Onboard soft-start
• Safe auto-restart after a fault condition
• Hysteretic thermal shutdown
Applications
• SMPS for set-top boxes, DVD players and
recorders, white goods
• Auxiliary power supply for consumer and home
equipment
• ATX auxi li ar y powe r su ppl y
• Low / medium power AC-DC adapters
Description
This device is an offline converter with an 800 V
rugged power section, a PWM control, two levels
of overcurrent protection, overvoltage and
overload protection, hysteretic thermal protection,
soft-start, and safe auto-restart after the removal
of any fault condition. Burst mode operation and
very low device consumption help to meet the
standby energy saving regulations. Advance
frequency jittering reduces EMI filter costs.
Brownout function protects the switch mode
power supply when the rectified input voltage
level is below the normal minimum level specified
for the system. The high voltage startup circuit is
embedded in the device.
DC input high voltage
wide range
+
DC Output voltage
-
+
VIPER37
DRAINDRAIN
DRAIN
DRAIN
DRAIN
BRVDD CONT FBGND
Table 1. Device summary
Order code Package Packing
VIPER37LE
SDIP10
Tube
VIPER37HE
VIPER37HD
SO16 narrow
VIPER37LD
VIPER37HDTR
Tape and reel
VIPER37LDTR
www.st.com
