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
D1
R1
AC
R2
X Capacitor
CAPZero
D2
MOV
and Other
EMI Filter
Components
Rev. D 11/11
2
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)
NC
D1
D1
NC
1
2
3
4
8
7
6
5
NC
D2
D2
NC
Rev. D 11/11
3
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
C
EXT
AC
X Capacitor2
MOV
POS1
MOV
POS2
Other EMI
Filter
Components
D1
R1
R2
CAPZero D2
Rev. D 11/11
4
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
R1
X Capacitor
R2 ≥4 mm
Rev. D 11/11
5
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
mA
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
6
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
7
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
2X
14
5
8
26.00 (0.236) BSC
D
4
A
4.90 (0.193) BSC
2
0.10 (0.004) C
2X
D
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
7X
C
H
o
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
DETAIL A
C
SEATING PLANE
Pin 1 ID
B
4
+
++
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 Identier
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
Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power
Integrations does not assume any liability arising from the use of any device or circuit described herein. POWER INTEGRATIONS MAKES
NO WARRANTY HEREIN AND SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS.
Patent Information
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.
Life Support Policy
POWER INTEGRATIONS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR
SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF POWER INTEGRATIONS. As used herein:
1. A Life support device or system is one which, (i) is intended for surgical implant into the body, or (ii) supports or sustains life, and (iii)
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.
The PI logo, TOPSwitch, TinySwitch, LinkSwitch, DPA-Switch, PeakSwitch, CAPZero, SENZero, LinkZero, HiperPFS, HiperTFS, HiperLCS,
Qspeed, EcoSmart, Clampless, E-Shield, Filterfuse, StakFET, PI Expert and PI FACTS are trademarks of Power Integrations, Inc. Other
trademarks are property of their respective companies. ©2011, Power Integrations, Inc.
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