ISL6551EVAL1 Intersil, ISL6551EVAL1 Datasheet - Page 45

• Manufacturer Part Number: ISL6551EVAL1
• Description: EVALUATION BOARD ISL6551
• Manufacturer: Intersil

Specifications of ISL6551EVAL1

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Isolated
• Voltage - Output: 3.3V
• Current - Output: 60A
• Voltage - Input: 36 ~ 75V
• Regulator Topology: Buck
• Frequency - Switching: 470kHz
• Board Type: Fully Populated
• Utilized Ic / Part: ISL6551
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

Acknowledgement
The author acknowledges the support of DT Magnetics for
designing and providing magnetics samples.
References
[1] Laszlo Balogh, “Design Review: 100W, 400kHz, DC/DC
Converter With Current Doubler Synchronous Ratification
Achieve 92% Efficiency.” Unitrode Integrated Circuit
Corporation.
Rdsonsyn
Vsynmax
Rdsonpri
Psynfetfr
t
Vinripple
Voripple
Psynfet
RESDLY
Vinmax
Vsynfet
Vomax
Vinmin
Pupfet
t
Vdsyn
Vmisc
DEAD
Von
Rcs
Vcc
Qg
Vin
Po
Ro
Se
Sn
t
Vo
Vp
Vs
Zo
on
T
Output Power
Power Dissipation of Synchronous FET
Losses of Syn FET in Freewheeling Period
Power Dissipation of Upper FET
Gate Charge of MOSFET at V
Current Sense Resistor
Rds(on) of Primary Switches
Output Load Impendence
Rds(on) of Synchronous FETs
External Slope Added to Sn
Positive Slope of One Output Inductor Current
Clock Period
Clock Dead Time
Primary MOSFET Switching Time at Turn On
Resonant Delay
Bias Voltage of Drivers
Body Diode Drop of Synchronous FETs
Input Voltage
Maximum Input Line
Minimum Input Line
Input Ripple Voltage
Output Voltage
Miscellaneous Voltage Drops Including Contact
Resistance, Winding Resistance, PCB Copper
Resistance
Maximum Output Voltage
Primary MOSFET V
Output Ripple Voltage
Voltage across Primary Winding
Voltage across Secondary Winding
Voltage Drop of Synchronous FET due to Its
Rds(on) at Half of the Load
Maximum Voltage across V
Impedance of Output Capacitors and Load
TERM DEFINITIONS (Continued)
45
DS
at Turn-on
DS
GS
of Syn FET
Application Note 1002
[2] Laszlo Balogh, “The Current doubler Rectifiers: An
Alternative Rectification Technique For Push-Pull and Bridge
Converters,” Design Note-63, Unitrode Integrated Circuit
Corporation.
[3] Vatché Vorpérian, “Simplified Analysis of PWM
Converters Using the Model of the PWM Switch Part I:
Continuous Conduction Mode.” IEEE Transactions on
Aerospace and Electronics Systems Vol 26, No. 3 May 1990
p. 490-496.
[4] “Designers’s Series - Part V Current-Mode Control
Modeling.” Switching Power Magazine. July 2001, Volume 2,
Issue 3.
[5] “PCB Design Guidelines For Reduced EMI.” Texas
Instrument: SZZA009, November 1999.
[6] Rais Miftakhutdinov. “An Analytical Comparison of
Alternative Control Technique for Powering Next Generation
Microprocessors.” TI-Unitrode Power Supply Design
Seminar, 2001 Series.
[7] Vatché Vorpérian. Analytical Methods in Power
Electronics (Lecture Note). CA: California Institute of
Technology.
Appendix
1. Block diagram of the converter in the evaluation board.
2. Evaluation board schematics (6 pages).
3. Evaluation board layout (12 pages).
4. Bill of Materials of the evaluation board (2 pages).
5. Preliminary specifications of the converter.