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STMicroelectronics Electronic Components Datasheet

VIPER38 Datasheet

peak power high-voltage converter

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VIPER38
VIPerPlus family: peak power high-voltage converter
Figure 1. Typical application
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Features
800 V avalanche-rugged power MOSFET
allowing ultra wide range input Vac to be
achieved
Embedded HV start-up and sense FET
PWM current-mode controller
OCP with selectable threshold (IDlim) and 2nd
OCP with higher value (IDMAX) to protect the IC
from transformer saturation or short-circuit of
the secondary diode
30 mW no-load consumption at 230 Vac
Two operating frequencies:
– 60 kHz (L type) or 115 kHz (H type)
Jittered frequency reduces the EMI
Extra power timer (EPT) blanks the overload
current for few seconds
Datasheet - production data
Output overvoltage protection with tight
tolerance and digital noise filter
Soft-start reduces the stress during startup and
increases IC lifetime
Automatic restart after a fault condition
Thermal shutdown increases system reliability
and IC lifetime
Applications
Auxiliary power supply for consumer and home
equipment
Power supply for energy meters and data
concentrators
Adapters
Description
The device is a high-voltage converter that
smartly integrates an 800 V rugged power
MOSFET with PWM current-mode control. The
power MOSFET allows a very high input Vac to be
applied, just limited from its breakdown voltage.
This IC is capable of meeting more stringent
energy-saving standards as it has very low
consumption and operates in burst mode under
light load.
The device features an adjustable extra power
timer (EPT) that enables the IC to sustain
overload conditions for a few seconds.
The integrated HV startup, sense FET and
oscillator with jitter allow the advantage of using
minimal components in the application.
The device features high-level protections like
dual-level OCP, output overvoltage, short-circuit,
and thermal shutdown with hysteresis. After the
removal of a fault condition, the IC is
automatically restarted.
November 2019
This is information on a product in full production.
DS10100 Rev 3
1/30
www.st.com


STMicroelectronics Electronic Components Datasheet

VIPER38 Datasheet

peak power high-voltage converter

No Preview Available !

Contents
Contents
VIPER38
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Typical power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Typical electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6 Typical circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.1 Power section and gate driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.2 High-voltage startup generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.3 Power-up and soft startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.4 Power-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.5 Auto-restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.6 Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.7 Current mode conversion with adjustable current limit setpoint . . . . . . . . 18
7.8 Overvoltage protection (OVP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.9 About CONT pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.10 Feedback and overload protection (OLP) . . . . . . . . . . . . . . . . . . . . . . . . 20
7.11 Burst-mode operation at no load or very light load . . . . . . . . . . . . . . . . . . 22
7.12 Extra power timer (EPT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.13 2nd level overcurrent protection and hiccup mode . . . . . . . . . . . . . . . . . . 23
8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.1 SDIP10 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.2 SO16 Narrow package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
9 Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2/30 DS10100 Rev 3


Part Number VIPER38
Description peak power high-voltage converter
Maker STMicroelectronics
Total Page 30 Pages
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