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STMicroelectronics |
VIPER17
Energy saving VIPerPlus: HV switching regulator for flyback
converter
Datasheet - production data
• On-board soft-start
• Safe auto-restart after a fault condition
• Hysteresis thermal shutdown
SO16 narrow
SO-16
DIP-7
Figure 1. Typical topology
+
DC input high voltage
wide range
-
+
DC Output voltage
-
Applications
• Adapters for PDA, camcorders, shavers,
cellular phones, videogames
• Auxiliary power supply for LCD/PDP TV,
monitors, audio systems, computer, industrial
systems, LED driver, No el-cap LED driver
• SMPS for set-top boxes, DVD players and
recorders, white goods
DRAIN DRAIN
BR
VIPER17
Description
GND VDD CONT FB
Features
• 800 V avalanche rugged power section
The device is an off-line converter with an 800 V
rugged power section, a PWM control, two levels
of overcurrent protection, overvoltage and
overload protections, hysteresis thermal
protection, soft-start and safe auto-restart after
any fault condition removal. The burst mode
operation and the device’s very low consumption
meet the standby energy saving regulations.
• PWM operation with frequency jittering for low
EMI
• Operating frequency:
– 60 kHz for L type
– 115 kHz for H type
• Standby power < 30 mW at 265 Vac
Advance frequency jittering reduces EMI filter
cost. Brown-out 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 start-up circuit is
embedded in the device.
• Limiting current with adjustable set point
• Adjustable and accurate overvoltage
protection
Table 1. Device summary
Order codes
Package
Packaging
VIPER17LN / VIPER17HN
VIPER17HD / VIPER17LD
VIPER17HDTR / VIPER17LDTR
DIP-7
SO16 narrow
Tube
Tube
Tape and reel
May 2014
This is information on a product in full production.
DocID14419 Rev 10
1/33
www.st.com
Contents
Contents
VIPER17
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Typical power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Typical electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6 Typical circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7 Operation descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.1 Power section and gate driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.2 High voltage startup generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.3 Power-up and soft-start up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.4 Power down operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.5 Auto restart operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.6 Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.7 Current mode conversion with adjustable current limit set point . . . . . . . 19
7.8 Overvoltage protection (OVP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.9 About CONT pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.10 Feed-back and overload protection (OLP) . . . . . . . . . . . . . . . . . . . . . . . . 22
7.11 Burst-mode operation at no load or very light load . . . . . . . . . . . . . . . . . . 24
7.12 Brown-out protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.13 2nd level overcurrent protection and hiccup mode . . . . . . . . . . . . . . . . . . 27
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
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