SEN012-013
®
SENZero Family
Zero1 Loss High Voltage Sense Signal Disconnect IC
High-Voltage
DC Rail
Product Highlights
Features and Performance
• Eliminates significant standby losses
• Disconnects unnecessary circuit blocks during standby,
remote-off, or light-load conditions
System
VCC
VCC
D1
D2
• Ultra low leakage (maximum 1 mA) 650 V MOSFETs
• <0.5 mW per channel during standby
• Single component provides remote disconnect functionality
• No external components or additional bias supply needed for
remote-off
System
Standby
Signal
• Integrates multiple disconnect MOSFETs, gate drive, and
protection
• Minimal component count provides higher reliability
• Protection features to help production/manufacturing yields
• Pin-to-pin fault and ESD protection
G
S1
S2
SENZero
To Controller(s)
Sense Pins
System
Ground
PI-5813-032510
• Triggerable via remote-off signal or load conditions
• Integrated gate pull down circuit protects against loss of
trigger signal fault
Figure 1. Typical Application SEN012.
• Green package technology
• RoHS compliant and halogen free
• Withstands high differential surge conditions
• S1, S2 and S3 interface with controller pins up to 6.5 V
above system ground
High-Voltage
DC Rail
System
VCC
EcoSmart® – Energy Efficient
VCC
D1
D2
D3
•
<3 mW loss at 230 VAC in Off/standby mode
System
Standby
Signal
Applications
• ACDC converters with high-voltage resistive signal paths
• Ideal for all very low standby systems such as those meeting
EuP Lot 6 and similar energy efficiency standards
G
S1
S2
S3
SENZero
To Controller(s)
Sense Pins
Description
SENZero is a compact low cost solution to eliminate losses in
resistive signal paths connected between high-voltage rails and
switching power supply controller(s). Examples include feed-
forward or feedback signal paths connected to boost controllers
in power factor corrected systems and feedforward signal paths
in two switch forward / LLC / half and full bridge converters.
System
Ground
PI-5812-032510
Figure 2. Typical Application SEN013.
Component Selection Table
The device is available in 2 (SEN012) and 3 (SEN013) channel
versions according to the application’s requirements. The
internal gate drive and protection circuitry provides gate drive
signals to the internal 650 V MOSFETs in response to the voltage
applied to the VCC pin. This simple configuration provides easy
integration into existing systems by using the system VCC rail as
an input to the SENZero.
230 VAC
Power Consumption
in Standby
Integrated Disconnect
MOSFETs
Product2
SEN012DG
SEN013DG
2
3
<1 mW
<1.5 mW
Table 1. Component Selection Table.
Notes:
The SENZero family uses a low cost compact SO-8 package to
reduce PCB area while the pin configuration is designed to meet
pin-pin fault conditions.
1. IEC 62301 clause 4.5 rounds standby power use below 5 mW to zero.
2. Package: D: SO-8.
www.powerint.com
November 2010