Datasheet

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November 2010 Doc ID 12050 Rev 2 1/21

VIPer22A-E

VIPer22ADIP-E, VIPer22AS-E

Low power OFF-line SMPS primary switcher

Features

■ Fixed 60 kHz switching frequency

■ 9 V to 38 V wide range V

voltage

■ Current mode control

■ Auxiliary undervoltage lockout with hysteresis

■ High voltage start-up current source

■ Overtemperature, overcurrent and overvoltage

protection with auto-restart

Description

The VIPer22A-E combines a dedicated current

mode PWM controller with a high voltage power

MOSFET on the same silicon chip.

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.

Overvoltage protection in HICCUP mode.

Figure 1. Block diagram

Table 1. Typical power capability

Mains type SO-8 DIP-8

European (195 - 265 Vac) 12 W 20 W

US / wide range (85 - 265 Vac) 7 W 12 W

DIP-8SO-8

ON/OFF

0.23 V

DRAIN

SOURCE

VDD

PWM

LATCH

60kHz

OSCILLATOR

BLANKING

8/14.5V

REGULATOR

INTERNAL

SUPPLY

OVERVOLTAGE

LATCH

OVERTEMP.

DETECTOR

1 kΩ

42V

230 Ω

www.st.com

Summary of content (21 pages)

PAGE 1
VIPer22A-E VIPer22ADIP-E, VIPer22AS-E Low power OFF-line SMPS primary switcher Features ■ Fixed 60 kHz switching frequency ■ 9 V to 38 V wide range VDD voltage ■ Current mode control ■ Auxiliary undervoltage lockout with hysteresis ■ High voltage start-up current source ■ Overtemperature, overcurrent and overvoltage protection with auto-restart Table 1.
PAGE 2
Contents VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Contents 1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 3
VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 1 Electrical data 1.1 Maximum ratings Electrical data 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 any other conditions above those indicated in the operating sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 2.
PAGE 4
Electrical characteristics 2 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Electrical characteristics TJ = 25 °C, VDD = 18 V, unless otherwise specified Table 4. Power section Symbol Parameter BVDSS Drain-source voltage ID = 1 mA; VFB = 2 V OFF state drain current VDS = 500 V; VFB = 2 V; TJ = 125 °C Static drain-source ON state resistance ID = 0.4 A ID = 0.4 A; TJ = 100 °C tf Fall time ID = 0.2 A; VIN = 300 V (1) (See Figure 9 on page 13) 100 ns tr Rise time ID = 0.
PAGE 5
VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Table 6. Symbol FOSC Table 7. Symbol Electrical characteristics Oscillation section Parameter Test conditions VDD = VDDoff ... 35 V; TJ = 0 ... 100 °C Oscillator frequency total variation Min Typ Max Unit 54 60 66 kHz Min Typ Max Unit 0.
PAGE 6
Pin connections and function 3 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Pin connections and function Figure 2. Pin connection SOURCE 1 8 DRAIN SOURCE 1 8 DRAIN SOURCE 2 7 DRAIN SOURCE 2 7 DRAIN FB 3 6 DRAIN FB 3 6 DRAIN VDD 4 5 DRAIN VDD 4 5 DRAIN SO-8 Figure 3. DIP-8 Current and voltage conventions I DD ID VDD I FB FB VDD VFB Table 10. CONTROL VD SOURCE VIPer22A Pin function Pin Name Pin function VDD Power supply of the control circuits.
PAGE 7
VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Operations 4 Operations 4.1 Rectangular U-I output characteristics Figure 4. Rectangular U-I output characteristics for battery charger DCOUT R1 D2 D1 C1 D3 T2 F1 C3 + AC IN T1 C2 D4 ISO1 U1 C4 DRAIN - VDD FB C5 CONTROL C6 SOURCE VIPerX2A C7 R2 D5 R3 U2 R4 Vcc Vref R5 C8 C10 R7 R8 C9 - + + - GND TSM101 R6 R9 R10 GND A complete regulation scheme can achieve combined and accurate output characteristics. Figure 4.
PAGE 8
Operations 4.2 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Wide range of VDD voltage The VDD pin voltage range extends from 9 V to 38 V. This feature offers a great flexibility in design to achieve various behaviors. In Figure 4 on page 7 a forward configuration has been chosen to supply the device with two benefits: 4.3 ● As soon as the device starts switching, it immediately receives some energy from the auxiliary winding.
PAGE 9
VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Operations The Power MOSFET delivers a sense current Is which is proportional to the main current Id. R2 receives this current and the current coming from the FB pin. The voltage across R2 is then compared to a fixed reference voltage of about 0.23 V. The MOSFET is switched off when the following equation is reached: R 2 ⋅ ( I S + I FB ) = 0.23V By extracting IS: 0.
PAGE 10
Operations VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Figure 6. IFB transfer function IDpeak IDlim Part masked threshold by the IFBsd 1 t ⋅V ONmin IN ----------------------------------------L 85mA IFB 2 t ⋅V IN ONmin ---------------------------------------L 0 IFBsd It is then possible to build the total DC transfer function between ID and IFB as shown on Figure 6 on page 10. This figure also takes into account the internal blanking time and its associated minimum turn on time.
PAGE 11
VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 4.4 Operations 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 up current source is activated as long as VDD is lower than VDDon. When reaching VDDon, the start up current source is switched OFF and the device begins to operate by turning on and off its main power MOSFET.
PAGE 12
Operations 4.5 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Overvoltage threshold An overvoltage detector on the VDD pin allows the VIPer22A to reset itself when VDD exceeds VDDovp. This is illustrated in Figure 8. which shows the whole sequence of an overvoltage event. Note that this event is only latched for the time needed by VDD to reach VDDoff, and then the device resumes normal operation automatically. Figure 8.
PAGE 13
VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 5 Operation pictures Operation pictures Figure 9. Rise and fall time ID C L D C << Coss t VDS VDD FB 90% 300V SOURCE trv tfv DRAIN CONTROL VIPer22A t 10% Figure 10. Start-up VDD current IDD IDD0 VDDhyst VDDoff VDD VDDon IDDch 100 V≤ VDS ≤ 400 V Fsw = 0 kHz Figure 11.
PAGE 14
Operation pictures VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Figure 12. Peak drain current vs feedback current 100V ID 4mH IDpeak VDD 1/FOSC t FB 18V IFB FBsd ⋅R VIPer22A FB The drain current limitation is obtained for VFB = 0 V, and a negative current is drawn from the FB pin. See the Application section for further details. IFB IDpeak IDlim G ID ΔI Dpeak= – ----------------------ΔI FB IFB 0 Figure 13.
PAGE 15
VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Operation pictures Figure 14. Switching frequency vs temperature Figure 15.
PAGE 16
Package mechanical data 6 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 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 at: www.st.com. ECOPACK is an ST trademark.
PAGE 17
VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Table 11. Package mechanical data DIP-8 mechanical data Databook (mm.) Dim. Min. Nom. A Max. 5.33 A1 0.38 A2 2.92 3.30 4.95 b 0.36 0.46 0.56 b2 1.14 1.52 1.78 c 0.20 0.25 0.36 D 9.02 9.27 10.16 E 7.62 7.87 8.26 E1 6.10 6.35 7.11 e 2.54 eA 7.62 eB L 10.92 2.92 Package Weight 3.30 3.81 Gr. 470 Figure 16.
PAGE 18
Package mechanical data Table 12. VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E SO-8 mechanical data Databook (mm. Dim. Min. Max. A 1.35 1.75 A1 0.10 0.25 A2 1.10 1.65 B 0.33 0.51 C 0.19 0.25 D 4.80 5.00 E 3.80 4.00 e 1.27 H 5.80 6.20 h 0.25 0.50 L 0.40 1.27 k 8° (max.) ddd 0.1 Figure 17. Package dimensions 18/21 Nom.
PAGE 19
VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 7 Order codes Order codes Table 13.
PAGE 20
Revision history 8 VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Revision history Table 14. 20/21 Document revision history Date Revision Changes 09-Feb-2006 1 Initial release. 25-Nov-2010 2 Updated Table 11.
PAGE 21
VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Please Read Carefully: 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.