VIPER28HN STMicroelectronics, VIPER28HN Datasheet

IC OFFLINE CONV PWM OVP 8DIP

VIPER28HN

Manufacturer Part Number
VIPER28HN
Description
IC OFFLINE CONV PWM OVP 8DIP
Manufacturer
STMicroelectronics
Series
VIPer™ plusr
Datasheet

Specifications of VIPER28HN

Output Isolation
Isolated
Frequency Range
103 ~ 127kHz
Voltage - Input
8.5 ~ 23.5 V
Voltage - Output
800V
Power (watts)
20W
Operating Temperature
-25°C ~ 125°C
Package / Case
8-DIP (0.300", 7.62mm), 7 Leads
Output Voltage
800 V
Output Power
1 W
Input Voltage
- 0.3 V
Switching Frequency
115 KHz
Operating Temperature Range
- 40 C to + 150 C
Mounting Style
Through Hole
Duty Cycle (max)
80 %
Number Of Outputs
1
For Use With
497-8840 - EVAL BOARD FOR VIPER28LD 60KHZ497-8839 - EVAL BOARD FOR VIPER28HD 115KHZ
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-8391-5

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
VIPER28HN
Quantity:
14 714
Part Number:
VIPER28HN
Manufacturer:
ST
0
Part Number:
VIPER28HN
Manufacturer:
ST
Quantity:
20 000
Part Number:
VIPER28HN
Manufacturer:
ST
Quantity:
9 867
Part Number:
VIPER28HN.
Manufacturer:
ST
0
Features
Application
Table 1.
August 2010
VIPER28HDTR / VIPER28LDTR
800 V avalanche rugged power section
PWM operation with frequency jittering for low
EMI
Operating frequency:
– 60 kHz for L type
– 115 kHz for H type
Standby power < 50 mW at 265 V
Limiting current with adjustable set point
Adjustable and accurate over-voltage
protection
On-board soft-start
Safe auto-restart after a fault condition
Hysteretic thermal shutdown
Delayed overload protection
Auxiliary power supply for consumer and home
equipment
ATX auxiliary power supply
Low / medium power AC-DC adapters
SMPS for set-top boxes, DVD players and
recorders, white goods
VIPER28LN / VIPER28HN
VIPER28HD / VIPER28LD
VIPER28LE / VIPER28HE
Order codes
Device summary
AC
Doc ID 15028 Rev 4
SO16 narrow
Package
SDIP10
DIP-7
Description
The device is an off-line converter with an 800 V
rugged power section, a PWM control, two levels
of over-current protection, over-voltage and
overload protections, hysteretic thermal
protection, soft-start and safe auto-restart after
any fault condition removal. Burst mode operation
and device very low consumption help to meet the
standby energy saving regulations. Advance
frequency jittering reduces EMI filter cost. The
extra power timer allows the management of
output peak power for a designed time window.
The high voltage start-up circuit is embedded in
the device.
Figure 1.
Off-line high voltage converters
DC input high voltage
wide range
+
-
SDIP10
DRAIN DRAIN
GND
VIPER28
VDD
CONT
Typical topology
EPT
FB
SO16 narrow
SO 16
Tape and reel
Packaging
Tube
VIPER28
DIP-7
DC Output voltage
www.st.com
+
-
1/32
32

Related parts for VIPER28HN

VIPER28HN Summary of contents

Page 1

... ATX auxiliary power supply ■ Low / medium power AC-DC adapters ■ SMPS for set-top boxes, DVD players and recorders, white goods Table 1. Device summary Order codes VIPER28LN / VIPER28HN VIPER28LE / VIPER28HE VIPER28HD / VIPER28LD VIPER28HDTR / VIPER28LDTR August 2010 Off-line high voltage converters SDIP10 Description AC ...

Page 2

Contents Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

VIPER28 1 Block diagram Figure 2. Block diagram LEB LEB EPT Tov l Tov l EPT Tovl Tovl BLOCK BLOCK OLP OLP SOFT SOFT START START OCP OCP BLOCK BLOCK CONT CONT OVP DETECTION OVP DETECTION LOGIC LOGIC PWM PWM ...

Page 4

Pin settings 3 Pin settings Figure 3. Connection diagram (top view) Note: The copper area for heat dissipation has to be designed under the DRAIN pins. Table 3. Pin description Pin n. Name SDIP10 DIP-7 SO16N 1 1 1...2 GND ...

Page 5

VIPER28 4 Electrical data 4.1 Maximum ratings Table 4. Absolute maximum ratings Symbol V Drain-to-source (ground) voltage DRAIN Repetitive avalanche energy E AV (limited by T Repetitive avalanche current I AR (limited Pulse drain current (limited by ...

Page 6

Electrical data 4.3 Electrical characteristics (T = -25 to 125 ° Table 6. Power section Symbol Parameter V Break-down voltage BVDSS I OFF state drain current OFF Drain-source on state R DS(on) resistance Effective (energy related) C OSS ...

Page 7

VIPER28 Table 8. Controller section Symbol Parameter Feed-back pin V Over-load shut down threshold FBolp V Linear dynamics upper limit FBlin V Burst mode threshold FBbm V Burst mode hysteresis FBbmhys I Feed-back sourced current FB R Dynamic resistance FB(DYN) ...

Page 8

Electrical data Table 8. Controller section (continued) Symbol Parameter nd Over-current protection (2 OCP) I Second over-current threshold DMAX Over-voltage protection V Over-voltage protection threshold OVP T Over-voltage protection strobe time STROBE Extra power management I Drain current limit with ...

Page 9

VIPER28 Figure 4. Minimum turn-on time test circuit 14 V Figure 5. OVP threshold test circuits 14 V Note: Adjust V above V DD GND DRAIN VDD DRAIN 50 Ω CONT FB EPT 3.5 V GND DRAIN VDD DRAIN CONT ...

Page 10

Typical electrical characteristics 5 Typical electrical characteristics Figure 6. Current limit vs T Figure 8. Drain start-up voltage vs T Figure 10. Operating supply current (no switching 10/32 Figure 7. J Figure 9. J Figure 11. Operating supply ...

Page 11

VIPER28 Figure 12. Current limit vs R Figure 14. Power MOSFET break down voltage Figure 13. Power MOSFET on-resistance vs T LIM Doc ID 15028 Rev 4 Typical electrical characteristics J 11/32 ...

Page 12

Typical electrical characteristics Figure 15. Thermal shutdown DDon V DDoff V DD(RESTART) I DRAIN HYST SD Normal operation 12/32 Shut down after over temperature Doc ID 15028 Rev 4 VIPER28 ...

Page 13

VIPER28 6 Typical circuit Figure 16. Min-features flyback application Figure 17. Full-feature flyback application EPT EPT Doc ID 15028 Rev 4 Typical circuit 13/32 ...

Page 14

Operation descriptions 7 Operation descriptions is a high-performance low-voltage PWM controller chip with an 800 V, avalanche VIPER28 rugged Power section. The controller includes: the oscillator with jittering feature, the start up circuits with soft-start feature, the PWM logic, the ...

Page 15

VIPER28 7.3 Power-up and soft-start up If the input voltage rises up till the device start threshold, V begins to grow due to the I high voltage start up circuit. If the V page 6) the power MOSFET starts switching ...

Page 16

Operation descriptions Figure 19. Timing diagram: normal power-up and power-down sequences DRAIN_START DDon V DDoff V DD(RESTART) V DRAIN (3mA) DDch Figure 20. Soft-start: timing diagram 16/32 Normal operation Power-on I ...

Page 17

VIPER28 7.4 Power down operation At converter power down, the system loses regulation as soon as the input voltage is so low that the peak current limitation is reached. The V the V threshold (see DDoff energy transfers to the ...

Page 18

Operation descriptions 7.7 Current mode conversion with adjustable current limit set point The device is a current mode converter: the drain current is sensed and converted in voltage that is applied to the non inverting pin of the PWM comparator. ...

Page 19

VIPER28 Where: ● the OVP threshold (see OVP ● the converter output voltage value to activate the OVP set by designer OUT OVP ● the auxiliary winding turns AUX ● the secondary ...

Page 20

Operation descriptions 7.9 About CONT pin Referring to the Figure 1. Current limit set point 2. Overvoltage protection on the converter output voltage The Table 9 on page 20 activate one or plus of the CONT pin functions. Figure 23. ...

Page 21

VIPER28 When the feedback pin voltage reaches the threshold V starts to charge the feedback capacitor (C threshold, the converter is turned off and the start up phase is activated with reduced V FBolp value 0.6 mA, ...

Page 22

Operation descriptions Equation 7 Equation 8 The R is the dynamic resistance seen by the FB pin. FB(DYN) The C capacitor fixes the OLP delay and usually C FB1 The Equation 5 can be still used to calculate the OLP ...

Page 23

VIPER28 7.11 Burst-mode operation at no load or very light load When the load decrease the feedback loop reacts lowering the feedback pin voltage falls down the burst mode threshold, V switched on. After the MOSFET stops, as ...

Page 24

Operation descriptions 7.12 Extra power management function (EPT) Some applications need an extra power for a limited time window during which the converter regulation has to be guaranteed. The extra power management function allows to design a converter that can ...

Page 25

VIPER28 nd 7.13 2 level overcurrent protection and hiccup mode The is protected against short-circuit of the secondary rectifier, short-circuit on the VIPER28 secondary winding or a hard-saturation of fly-back transformer. Such as anomalous condition is invoked when the drain ...

Page 26

Package mechanical data 8 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 27

VIPER28 Figure 28. Package dimensions Doc ID 15028 Rev 4 Package mechanical data 27/32 ...

Page 28

Package mechanical data Table 11. SO16 narrow mechanical data Dim ccc 28/32 mm Min. Typ. 0.1 1.25 0.31 0.17 9.8 9.9 5.8 6 3.8 3.9 1.27 0.25 0.4 ...

Page 29

VIPER28 Figure 29. SO16 narrow mechanical data Doc ID 15028 Rev 4 Package mechanical data 29/32 ...

Page 30

Package mechanical data Table 12. SDIP10 mechanical data Dim Figure 30. SDIP10 mechanical drawing 30/32 mm Min. Typ. 0.38 2.92 0.36 0.51 0.2 9.02 7.62 6.1 7.62 ...

Page 31

VIPER28 9 Revision history Table 13. Document revision history Date 30-Sep-2008 22-Jan-2009 21-Oct-2009 31-Aug-2010 Revision 1 Initial release 2 Updated Figure 3 on page 4 3 Added SO16N and SDIP10 packages Updated Figure 3, Figure 4 page 4 Doc ID ...

Page 32

... 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. ...

Related keywords