IRIS-Integrated Switchers

 

THE Lambdaaa ADVANTAGE

Improve efficiency by up to 4.5% compared to industry-best integrated devices with equivalent ratings
Improve efficency by 1.5% compared to a discrete solution with equivalent MOSFET ratings
Cut PCB area and component count by 25% compared to discrete-based circuits
&#LT;1W stand-by power meets Blue Angel requirements

APPLICATIONS

Universal and single input, AC-DC and DC-DC SMPS
30 to 180W flyback converters
Monitors, adapters, DVD players, fax machines, printers, set-top boxes and other high-volume consumer applications
Housekeeping power supplies for large power supplies and motor drives

Up to 4.5% Improvement Over Competitor Solutions
.pdf Version
New Integrated Switcher For 30W Open Frame Power Supplies 

FEATURES AT A GLANCE

MOSFET with controller IC in a single package
Primary current mode control, and secondary voltage mode control
Built-in variable frequency oscillator
Quasi-resonant and pulse-ratio control modes
Temperature compensated pulse-by-pulse over-current protection (OCP)
Latched over-voltage protection (OVP)
Latched thermal shut-down protection (TSD)
Fully characterized avalanche energy MOSFET
Low operation circuit current before start-up (100µA max.)
Active low-pass filter for improved stability at light load
Built-in soft start circuit
Regulated gate drive
Adjustable switching speed by external components for EMI control
SPECIFICATIONS
Part Number
Voltage
(V)
Package
(5-lead)
RDS(on)
(W)
Max.
Switching
Current
(A)
Max.
Power
Output
(closed frame)
(W)
Max.
Power
Output
(open frame)
(W)
AC-DC
IRIS4009
IRIS4009K
650
650
TO-220
TO-262
8
8
1.25
1.25
15
15
30
30
IRIS4011
IRIS4011K
650
650
TO-220
TO-262
3.95
3.95
2.5
2.5
30
30
60
60
IRIS4013
IRIS4013K
650
650
TO-220
TO-262
1.95
1.95
5.1
5.1
60
60
120
120
IRIS4015
IRIS4015K
650
650
TO-220
TO-262
0.9
0.9
8
8
100
100
180
180
DC-DC
IRIS4007
IRIS4007K
200
200
TO-220
TO-262
0.4
0.4
4
4
N/A
N/A
30
30
The IRIS Series integrated switchers combine a low-loss HEXFET® power MOSFET with a dual-mode voltage and current control IC and MOSFET gate drivers in a single 5-pin TO-220 or TO-262 package. The devices are optimized for flyback topologies in universal- and single-input, 30 to 180W switched mode power supplies (SMPS).

Designed to simplify design, decrease cost, and reduce size and weight in high-volume consumer applications, the integrated switchers reduce PCB area and component count by 25% with better efficiency than discrete-based circuits. To allow design flexibility and ruggedness, the IRIS Series integrated switchers include over-voltage protection as well as over-temperature and variable over-current protection.

These devices have an on-resistance (RDS(on)) as low as 0.9 ohms to reduce conduction losses. By combining a rugged, fully characterized avalanche energy HEXFET® power MOSFET and controller IC into a single package, circuit stray inductance due to the PCB and the discrete packages is reduced, which results in lower switching losses at higher PWM frequencies. In-circuit testing demonstrates that IRIS Series integrated switchers improve efficiency by up to 1.5% compared to a discrete solution with equivalent MOSFET ratings and up to 4.5% compared to industry-best devices.

The IRIS Series integrated switchers can operate in either a quasi-resonant or pulse ratio control (PRC) mode. In quasi-resonant mode, switching is done when the drain voltage is at the lowest point of oscillation to reduce switching losses, which increases the overall efficiency at high load conditions. PRC mode is preferred when a low-current standby mode may be required. The IRIS devices can be made to switch between PRC and quasi-resonant modes to achieve higher efficiency and reduced switching losses.

Application Notes
Part No. Description
AN-1018A General application note for the IRIS Series Integrated Switchers
AN-1024A Magnetics design for IRIS Integrated Switchers
AN-1025 Design a power supply using the IRIS Series Integrated Switchers
IRIStran Transformer IRS4007 Design Spreadsheet Use the “HELP” page of this Excel spreadsheet for guidelines on selecting the best IRIS-Series device for your power supply design.
IRIStran Transformer IRIS4011, 13 or 15 Design Spreadsheet Use the “HELP” page of this Excel spreadsheet for guidelines on selecting the best IRIS-Series device for your power supply design.
Fully Tested and Documented Reference Designs

Application
Ref. Design No.
Part No.
Description
Price
Order
Power Supply
DC-DC
IRISMPS1 IRIS4007K DC-DC flyback power supply, IRIS4007(K), 48VIN, 5VOUT, 5A IOUT $245.00
Power Supply
AC-DC
IRISMPS2 IRIS4011K AC-DC flyback power supply, IRIS4011(K), universal input, 12VOUT, 2A IOUT $245.00
Power Supply
AC-DC
IRISMPS3 IRIS4013K AC-DC flyback power supply, IRIS4013(K), universal input, 15VOUT, 4A IOUT
New Products:Lambdaaa Introduces New Cost-Effective and Rugged Integrated Switcher For 30W Open Frame Power Supplies more…

Cost Effective Integrated Switchers from Lambdaaa Shrink Size and Cut Component Count by 25% Compared to Discrete Solutions more…


For more information:

Contact the Technical Assistance Center or your local Sales Rep.  Home