900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




STMicroelectronics Electronic Components Datasheet

VIPER37 Datasheet

fixed frequency offline converter

No Preview Available !

VIPER37
VIPerPlus family: fixed frequency offline converter
Features
800 V avalanche rugged power section
PWM operation with adjustable limiting current
30 mW standby power at 265 Vac
Operating frequency:
– 60 kHz for L type
– 115 kHz for H type
Frequency jittering for low EMC
Output overvoltage protection
High primary current protection (2nd 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 auxiliary power supply
Low / medium power AC-DC adapters
SDIP10
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.
Figure 1. Typical topology
+
DC input high voltage
wide range
DRAIN DRAIN DRAIN DRAIN DRAIN
VIPER37
GND VDD CONT FB
BR
+
DC Output voltage
-
Table 1.
Device summary
Order codes
VIPER37LE
VIPER37HE
February 2012
Package
SDIP10
Doc ID 022218 Rev 1
Packaging
Tube
1/35
www.st.com
35


STMicroelectronics Electronic Components Datasheet

VIPER37 Datasheet

fixed frequency offline converter

No Preview Available !

Contents
Contents
VIPER37
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Typical power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Typical electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6 Typical circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7 Efficiency performances for a typical flyback converter . . . . . . . . . . . 16
8 Operation description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8.1 Power section and gate driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8.2 High voltage startup generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8.3 Power-up and soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.4 Power down operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.5 Auto-restart operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.6 Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8.7 Current mode conversion with adjustable current limit set point . . . . . . . 22
8.8 Overvoltage protection (OVP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.9 About the CONT pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.10 Feedback and overload protection (OLP) . . . . . . . . . . . . . . . . . . . . . . . . . 25
8.11 Burst mode operation at no load or very light load . . . . . . . . . . . . . . . . . . 27
8.12 Brownout protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.13 2nd level overcurrent protection and hiccup mode . . . . . . . . . . . . . . . . . . 30
2/35 Doc ID 022218 Rev 1


Part Number VIPER37
Description fixed frequency offline converter
Maker STMicroelectronics
Total Page 30 Pages
PDF Download

VIPER37 Datasheet PDF

View PDF for Mobile






Similar Datasheet

1 VIPer31SP BATTERY CHARGER PRIMARY IC
STMicroelectronics
2 VIPer32 OFF LINE SMPS PRIMARY SWITCHER
STMicroelectronics
3 VIPer32DIP OFF LINE SMPS PRIMARY SWITCHER
STMicroelectronics
4 VIPer32S OFF LINE SMPS PRIMARY SWITCHER
STMicroelectronics
5 VIPer35 Quasi-resonant high performance off line high voltage converter
STMicroelectronics
6 VIPER37 fixed frequency offline converter
STMicroelectronics
7 VIPER38 peak power high-voltage converter
STMicroelectronics





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy