IC OFFLINE SWIT PWM SMPS CM 8DIP

VIPER12ADIP-E

Manufacturer Part NumberVIPER12ADIP-E
DescriptionIC OFFLINE SWIT PWM SMPS CM 8DIP
ManufacturerSTMicroelectronics
SeriesVIPER™
TypePulse Width Modulator Controller
VIPER12ADIP-E datasheets
 

Specifications of VIPER12ADIP-E

Output IsolationIsolatedFrequency Range54 ~ 66kHz
Voltage - Input8 ~ 50 VVoltage - Output730V
Power (watts)8WOperating Temperature25°C ~ 125°C
Package / Case8-DIP (0.300", 7.62mm)Current, Supply4.5 mA
Frequency, Oscillator60 kHzPackage TypeDIP-8
Regulator TypeSwitchingResistance, Thermal, Junction To Case15 °C/W
Temperature, Operating, Range-40 to +150 °CTime, Fall100 ns
Time, Rise50 nsVoltage, Supply18 V
Output Voltage38 VOutput Power5 W
Input Voltage0 V to 50 VSwitching Frequency60 KHz
Operating Temperature Range- 40 C to + 150 CMounting StyleThrough Hole
For Use With497-6413 - BOARD EVAL VIPER12A LP AC/DC497-5084 - EVAL BOARD TRAVEL ADAPTOR 3.6W497-5082 - EVAL BOARD FLYBACK PWR SUPPLY 6W497-4932 - BOARD POWER SUPPLY 1.8W VIPER12A497-4931 - BOARD 6W DUAL OUTPUT VIPER12A497-4930 - BOARD 6W SINGLE OUTPUT VIPER12ALead Free Status / RoHS StatusLead free / RoHS Compliant
Other names497-5575-5
VIPER12ADIP-E
  
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Low power offline switched-mode power supply primary switcher
Features
Fixed 60 kHz switching frequency
9 V to 38 V wide range V
DD
Current mode control
Auxiliary undervoltage lockout with hysteresis
High voltage start-up current source
Overtemperature, overcurrent and overvoltage
protection with auto-restart
Typical power capability
– European (195 - 265 Vac) 8 W for SO-8,
13 W for DIP-8
– European (85 - 265 Vac) 5 W for SO-8,
8 W for DIP-8
Description
The VIPER12A combines a dedicated current
mode PWM controller with a high voltage power
MOSFET on the same silicon chip.
Figure 1.
Block diagram
REGULATOR
INTERNAL
SUPPLY
_
VDD
8/14.5V
+
+
_
42V
FB
December 2010
voltage
Typical applications cover off line power supplies
for battery charger adapters, standby power
supplies for TV or monitors, auxiliary supplies for
motor control, etc.
The internal control circuit offers the following
benefits: Large input voltage range on the V
accommodates changes in auxiliary supply
voltage (This feature is well adapted to battery
charger adapter configurations), automatic burst
mode in low load condition and overvoltage
protection in HICCUP mode.
ON/OFF
60kHz
OSCILLATOR
PWM
S
LATCH
OVERTEMP.
FF
R1
Q
DETECTOR
R2
R3
R4
BLANKING
OVERVOLTAGE
LATCH
R
FF
S
Q
Doc ID 11977 Rev 2
VIPER12A-E
SO-8
DIP-8
DD
DRAIN
+
_
0.23 V
230 Ω
1 kΩ
SOURCE
www.st.com
pin
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VIPER12ADIP-E Summary of contents

  • Page 1

    Low power offline switched-mode power supply primary switcher Features ■ Fixed 60 kHz switching frequency ■ wide range V DD ■ Current mode control ■ Auxiliary undervoltage lockout with hysteresis ■ High voltage start-up current ...

  • Page 2

    Contents Contents 1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 3

    VIPER12A-E 1 Electrical data 1.1 Maximum rating Stressing the device above the rating listed in the “absolute maximum ratings” table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or ...

  • Page 4

    Electrical characteristics 2 Electrical characteristics ° unless otherwise specified J DD Table 3. Power section Symbol Parameter BV Drain-source voltage DSS OFF State drain I DSS current Static drain-source r DS(on) ON state ...

  • Page 5

    VIPER12A-E Table 5. Oscillation section Symbol Parameter Oscillator frequency F OSC total variation Table 6. PWM comparator section Symbol Parameter Peak current I Dlim limitation I I shutdown current FBsd FB FB pin ...

  • Page 6

    Pin connections and function 3 Pin connections and function Figure 2. Pin connection SOURCE 1 SOURCE VDD 4 Figure 3. Current and voltage conventions Table 9. Pin function Pin Name Power supply of the control circuits. Also ...

  • Page 7

    VIPER12A-E 4 Rectangular U-I output characteristics Figure 4. Rectangular U-I output characteristics for battery charger A complete regulation scheme can achieve combined and accurate output characteristics. Figure 4. presents a secondary feedback through an optocoupler driven by a TSM101. This ...

  • Page 8

    Wide range of VDD voltage 5 Wide range of V The V pin voltage range extends from This feature offers a great flexibility in DD design to achieve various behaviors. In chosen to supply the ...

  • Page 9

    VIPER12A-E 6 Feedback pin principle of operation A feedback pin controls the operation of the device. Unlike conventional PWM control circuits which use a voltage input (the inverted input of an operational amplifier), the FB pin is sensitive to current. ...

  • Page 10

    Feedback pin principle of operation The current limitation is obtained with the FB pin shorted to ground ( negative current sourced by this pin, and expressed by: By reporting this expression in the previous one possible ...

  • Page 11

    VIPER12A-E 7 Startup sequence Figure 7. Startup sequence This device includes a high voltage start up current source connected on the drain of the device. As soon as a voltage is applied on the input of the converter, this start ...

  • Page 12

    Overvoltage threshold 8 Overvoltage threshold An overvoltage detector on the V exceeds V . This is illustrated in DDovp overvoltage event. Note that this event is only latched for the time needed and then the device ...

  • Page 13

    VIPER12A-E 9 Operation pictures Figure 9. Rise and fall time Figure 10. Start- DD0 V DDhyst V DDoff I DDch Figure 11. Restart duty-cycle current DDon V = 100 ...

  • Page 14

    Operation pictures Figure 12. Peak drain current vs feedback current Figure 13. Thermal shutdown 14/21 Doc ID 11977 Rev 2 VIPER12A-E ...

  • Page 15

    VIPER12A-E Figure 14. Switching frequency vs temperature Figure 15. Current limitation vs temperature Doc ID 11977 Rev 2 Operation pictures 15/21 ...

  • Page 16

    Package mechanical data 10 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available ...

  • Page 17

    VIPER12A-E Table 10. DIP8 mechanical data Ref Package Weight Figure 16. Package dimensions Databook (mm) Min. Nom. 0.38 2.92 3.30 0.36 0.46 1.14 1.52 0.20 0.25 9.02 ...

  • Page 18

    Package mechanical data Table 11. SO8 mechanical data Dim ddd Figure 17. Package dimensions 18/21 Databook (mm) Nom Min 1.35 0.10 1.10 0.33 0.19 4.80 3.80 1.27 5.80 ...

  • Page 19

    ... VIPER12A-E 11 Order codes Table 12. Order codes Order codes VIPER12ASTR-E VIPER12AS-E VIPER12ADIP-E Package SO-8 SO-8 DIP-8 Doc ID 11977 Rev 2 Order codes Packaging Tape and reel Tube Tube 19/21 ...

  • Page 20

    Revision history 12 Revision history Table 13. Document revision history Date 09-Jan-2006 13-Dec-2010 20/21 Revision 1 Initial release. Updated Table 3 on page 2 on page 13. Doc ID 11977 Rev 2 VIPER12A-E Changes 4, Table 4 on page 4 ...

  • Page 21

    ... VIPER12A-E Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...