CAP012DG - Power Integrations

CAPZero Family

Zero1 Loss Automatic X Capacitor Discharge IC

www.powerint.com November 2011

™

Component Selection Table

Product3BVDSS

Maximum Total

X Capacitance

Total Series

Resistance2

(R1 + R2)

CAP002DG 825 V ≤ 500 nF 1.5 MW

CAP012DG 1000 V

CAP003DG 825 V 750 nF 1.02 MW

CAP013DG 1000 V

CAP004DG 825 V 1 mF 780 kW

CAP014DG 1000 V

CAP005DG 825 V 1.5 mF 480 kW

CAP015DG 1000 V

CAP006DG 825 V 2 mF 360 kW

CAP016DG 1000 V

CAP007DG 825 V 2.5 mF 300 kW

CAP017DG 1000 V

CAP008DG 825 V 3.5 mF 200 kW

CAP018DG 1000 V

CAP009DG 825 V 5 mF 150 kW

CAP019DG 1000 V

Table 1. Component Selection Table.

Notes:

1. IEC 62301 clause 4.5 rounds standby power use below 5 mW to zero.

2. Values are nominal. RC time constant is <1 second with ±20% X capacitor and

±5% resistance from these nominal values.

3. Packages: D: SO-8.

Product Highlights

• Blocks current through X capacitor discharge resistors when

AC voltage is connected

• Automatically discharges X capacitors through discharge

resistors when AC is disconnected

• Simpliﬁes EMI ﬁlter design – larger X capacitor allows smaller

inductive components with no change in consumption

• Only two terminals – meets safety standards for use before or

after system input fuse

• >4 mm creepage on package and PCB

• Self supplied – no external bias required

• High common mode surge immunity – no external ground

connection

• High differential surge withstand – 1000 V internal MOSFETs

EcoSmart® – Energy Efﬁcient

• <5 mW consumption at 230 VAC for all X capacitor values

Applications

• All ACDC converters with X capacitors >100 nF

• Appliances requiring EuP Lot 6 compliance

• Adapters requiring ultra low no-load consumption

• All converters requiring very low standby power

Description

When AC voltage is applied, CAPZero blocks current ﬂow in the

X capacitor safety discharge resistors, reducing the power loss to

less than 5 mW, or essentially zero1 at 230 VAC. When AC

voltage is disconnected, CAPZero automatically discharges the

X capacitor by connecting the series discharge resistors. This

operation allows total ﬂexibility in the choice of the X capacitor to

optimize differential mode EMI ﬁltering and reduce inductor costs,

with no change in power consumption.

Designing with CAPZero is simply a matter of selecting the

appropriate CAPZero device and external resistor values in Table 1

for the X capacitor value being used. This design choice will

provide a worst case RC time constant, when the AC supply is

disconnected, of less than 1 second as required by international

safety standards.

The simplicity and ruggedness of the two terminal CAPZero IC

makes it an ideal choice in systems designed to meet EuP Lot 6

requirements.

The CAPZero family has two voltage grades: 825 V and 1000 V.

The voltage rating required depends on surge requirement and

circuit conﬁguration of the application. See Key Applications

Considerations section for details.

Figure 1. Typical Application – Not a Simpliﬁed Circuit.

PI-6599-110711

X Capacitor

CAPZero

MOV

and Other

EMI Filter

Components

Rev. D 11/11

CAPZero Family

www.powerint.com

Figure 2. Pin Conﬁguration.

Pin Functional Description

The pin conﬁguration of Figure 2 ensures that the width of the

SO-8 package is used to provide creepage and clearance

distance of over 4 mm.

Although electrical connections are only made to pins 2, 3, 6

and 7, it is recommended that pins 1-4 and pins 5-8 are

coupled together on the PCB – see Applications Section.

PI-5608-060810

D Package (SO-8)

Rev. D 11/11

CAPZero Family

www.powerint.com

Key Application Considerations

Breakdown Voltage Selection

Figure 3 illustrates possible system conﬁgurations inﬂuencing

the choice of CAPZero breakdown voltage. The system

conﬁguration variables include the placement of the system

MOV and X capacitor(s) as well as the differential surge voltage

speciﬁcations of the application.

As shown in Table 1, each device in the CAPZero family has a

825 V or 1000 V option. For applications where the system

MOV is placed in position 1 (MOVPOS1 in Figure 3), the 825 V

option will typically provide adequate voltage withstand for

surge requirements up to 3 kV or more. The 1 kV CAPZero

would be recommended for higher surge requirements or if

additional voltage margin is required.

For MOV placement that is not directly across the X Capacitor1

(for example MOVPOS2 in Figure 3) the 1000 V CAPZero devices

can be used up to a surge speciﬁcation of 1.5 kV. For differential

surge voltage speciﬁcations of >1.5 kV it is recommended that

the MOV is always placed in the location shown in Figure 3 as

MOVPOS1.

It is always recommended that the peak voltage between

terminals D1 and D2 of CAPZero is measured during surge

tests in the ﬁnal system. Measurements of peak voltage across

CAPZero during surge tests should be made with oscilloscope

probes having appropriate voltage rating and using an isolated

supply to the oscilloscope to avoid ground currents inﬂuencing

measurement results. When making such measurements, it is

recommended that 50 V engineering margin is allowed below

the breakdown voltage speciﬁcation (for example 950 V with the

1000 V CAPZero).

Figure 3. Placement Options of MOV and CEXT.

If the measured peak Drain voltage exceeds 950 V, an external

1 kV ceramic capacitor of value up to 47 pF can also be placed

between D1 and D2 terminals to attenuate the voltage applied

between the CAPZero terminals during surge. This optional

external capacitor placement is shown as CEXT in Figure 3. It

should be noted that use of an external capacitor in this way will

increase power consumption slightly due to the CEXT charge/

discharge currents ﬂowing in R1 and R2 while AC is connected.

A CEXT value of 33 pF will add approximately 0.5 mW at 230 VAC,

50 Hz.

PCB Layout and External Resistor Selection

Figure 4 shows a typical PCB layout conﬁguration for CAPZero.

The external resistors in this case are divided into two separate

surface mount resistors to distribute loss under fault conditions

– for example where a short-circuit exists between CAPZero

terminals D1 and D2. R1 and R2 values are selected according

to Table 1.

Under a fault condition where CAPZero terminals D1 and D2 are

shorted together, each resistor will dissipate a power that can

be calculated from the applied AC voltage and the R1 and R2

values. For example in an application using CAP004 or CAP014,

R1=R2=390 kW. If CAPZero is shorted out at 265 VAC R1 and

R2 will each dissipate 45 mW.

Resistors R1 and R2 should also be rated for 50% of the system

input voltage again to allow for the short-circuitry of CAPZero

D1 to D2 pins during single point fault testing.

If lower dissipation or lower voltage across each resistor is

required during fault tests, the total external resistance can be

divided into more discrete resistors, however the total resistance

must be equal to that speciﬁed in Table 1.

PI-6600-110711

X Capacitor1

EXT

X Capacitor2

MOV

POS1

MOV

POS2

Other EMI

Filter

Components

CAPZero D2

Rev. D 11/11

CAPZero Family

www.powerint.com

Safety

CAPZero meets safety requirements even if placed before the

system input fuse. If a short-circuit is placed between D1 and

D2 terminals of CAPZero, the system is identical to existing

systems where CAPZero is not used.

With regard to open circuit tests, it is not possible to create a

fault condition through a single pin fault (for example lifted pin

test) since there are two pins connected to each of D1 and D2.

If several pins are lifted to create an open circuit, the condition

is identical to an open circuit X capacitor discharge resistor in

existing systems where CAPZero is not used. If redundancy

against open circuit faults is required, two CAPZero and R1 / R2

conﬁgurations can be placed in parallel.

Discharge Operation

To meet the safety regulations, when the AC supply is

disconnected, CAPZero will discharge the X capacitor to the

safety extra low voltage (SELV) levels according to the above

functional description. Although there are no speciﬁc safety

requirements below SELV, CAPZero still continues the discharge

until the X capacitor is fully discharged. As such CAPZero can

be safely used at low input voltages such as the common

industrial 18 VAC and 24 VAC supply rails while retaining X

capacitor discharge when the AC source is disconnected.

Figure 4. Typical PCB Layout.

PI-5610-041310

X Capacitor

R2 ≥4 mm

Rev. D 11/11

CAPZero Family

www.powerint.com

Parameter Symbol

Conditions

TA = -10 to 105 °C

(Unless Otherwise Speciﬁed)

Min Typ Max Units

Control Functions

AC Removal

Detection Time tDETECT Line Cycle Frequency 47-63 Hz 22 31.4 ms

Drain Saturation

CurrentA,B IDSAT

CAP002/012 0.25

CAP003/013 0.37

CAP004/014 0.48

CAP005/015 0.78

CAP006/016 1.04

CAP007/017 1.25

CAP008/018 1.88

CAP009/019 2.5

Supply Current ISUPPLY TA = 25 °C 21.7 mA

Notes

A. Saturation current speciﬁcations ensure a natural RC discharge characteristic at all voltages up to 265 VAC pk with the external

resistor values speciﬁed in Component Selection Table 1.

B. Speciﬁcations are guaranteed by characterization and design.

Absolute Maximum Ratings4

DRAIN Pin Voltage1 CAP002-CAP009 ..............................825 V

CAP012-CAP019 .............................1000 V

DRAIN Peak Current2 CAP002/CAP012 .................... 0.553 mA

CAP003/CAP013 .....................0.784 mA

CAP004/CAP014 .....................1.026 mA

CAP005/CAP015 .....................1.667 mA

CAP006/CAP016 .................... 2.222 mA

CAP007/CAP017 ......................2.667 mA

CAP008/CAP018 .................... 4.000 mA

CAP009/CAP019 .................... 5.333 mA

Storage Temperature ...................................... -65 °C to 150 °C

Lead Temperature3 .......................................................... 260 °C

Operating Ambient Temperature ...................... -10 °C to 105 °C

Maximum Junction Temperature ...................... -10 °C to 110 °C

Notes:

1. Voltage of D1 pin relative to D2 pin in either polarity.

2. The peak DRAIN current is allowed while the DRAIN voltage

is simultaneously less than 400 V.

3. 1/16 in. from case for 5 seconds.

4. The Absolute Maximum Ratings speciﬁed may be applied

one at a time without causing permanent damage to the

product. Exposure to Absolute Maximum Rating conditions

for extended periods of time may affect product reliability.

Rev. D 11/11

CAPZero Family

www.powerint.com

-25 0 25 50 10075 125

Temperature (°C)

ISUPPLY (Normalized to 25 °C)

1.20

1.10

1.00

0.90

0.80

0.70

0.60

0.50

0.40

0.30

0.20

0.10

0.00

PI-6020-062110

Typical Performance Characteristics

Figure 5. ISUPPLY vs. Temperature.

Rev. D 11/11

CAPZero Family

www.powerint.com

PI-5615-041210

D08A

SO-8 (D Package)

3.90 (0.154) BSC

Notes:

1. JEDEC reference: MS-012.

2. Package outline exclusive of mold flash and metal burr.

3. Package outline inclusive of plating thickness.

4. Datums A and B to be determined at datum plane H.

5. Controlling dimensions are in millimeters. Inch dimensions

are shown in parenthesis. Angles in degrees.

0.20 (0.008) C

26.00 (0.236) BSC

4.90 (0.193) BSC

0.10 (0.004) C

0.10 (0.004) C2X

A-B

1.27 (0.050) BSC

7X 0.31 - 0.51 (0.012 - 0.020)

0.25 (0.010) MC A-B D

0.25 (0.010)

0.10 (0.004)

(0.049 - 0.065)

1.25 - 1.65

1.75 (0.069)

1.35 (0.053)

0.10 (0.004) C

1.27 (0.050)

0.40 (0.016)

GAUGE

PLANE

0 - 8

1.04 (0.041) REF 0.25 (0.010)

BSC

SEATING

PLANE

0.25 (0.010)

0.17 (0.007)

DETAIL A

SEATING PLANE

Pin 1 ID

5.45 (0.215)

1.27 (0.050) 0.60 (0.024)

1.45 (0.057)

Reference

Solder Pad

Dimensions

4.00 (0.157)

Part Ordering Information

• CAPZero Product Family

• 002 Series Number

• Package Identier

D Plastic SO-8

• Package Material

G GREEN: Halogen Free and RoHS Compliant

• Tape & Reel and Other Options

Blank Standard Conﬁgurations

TL Tape & Reel, 2.5 k pcs.

CAP 002 D G - TL

Revision Notes Date

A Code A release. 04/14/10

B Updated ISUPPLY condition. Added ﬁgure 5. Parameter TDETECT was updated. 06/08/10

CUpdated Table 1. Updated Note 1 in Table 1. Added “Discharge Operation” paragraph. Updated Absolute Maximum Ratings Table. 02/11

C Added Maximum Junction Temperature speciﬁcation. 04/11

D Updated Figures 1 and 3. 11/07/11

For the latest updates, visit our website: www.powerint.com

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Integrations does not assume any liability arising from the use of any device or circuit described herein. POWER INTEGRATIONS MAKES

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WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS.

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The products and applications illustrated herein (including transformer construction and circuits external to the products) may be covered

by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A

complete list of Power Integrations patents may be found at www.powerint.com. Power Integrations grants its customers a license under

certain patent rights as set forth at http://www.powerint.com/ip.htm.

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POWER INTEGRATIONS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR

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whose failure to perform, when properly used in accordance with instructions for use, can be reasonably expected to result in signiﬁcant

injury or death to the user.

2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause

the failure of the life support device or system, or to affect its safety or effectiveness.

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