™
CAPZero
Family
Zero
1
Loss Automatic X Capacitor Discharge IC
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
®
R1
D1
MOV
and Other
X Capacitor
EMI Filter
Components
D2
R2
PI-6599-110711
AC
CAPZero
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
Figure 1.
Typical Application – Not a Simplified Circuit.
Component Selection Table
Product
3
CAP002DG
CAP012DG
CAP003DG
CAP013DG
CAP004DG
CAP014DG
CAP005DG
CAP015DG
CAP006DG
CAP016DG
CAP007DG
CAP017DG
CAP008DG
CAP018DG
CAP009DG
CAP019DG
BV
DSS
825 V
1000 V
825 V
1000 V
825 V
1000 V
825 V
1000 V
825 V
1000 V
825 V
1000 V
825 V
1000 V
825 V
1000 V
Maximum Total
X Capacitance
≤
500 nF
750 nF
1
mF
1.5
mF
2
mF
2.5
mF
3.5
mF
5
mF
Total Series
Resistance
2
(R1 + R2)
1.5 MW
1.02 MW
780 kW
480 kW
360 kW
300 kW
200 kW
150 kW
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 zero
1
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.
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.
www.powerint.com
November 2011
POWERINT [ POWER INTEGRATIONS, INC. ]
