HIP6004ACB Ver la hoja de datos (PDF) - Intersil

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HIP6004ACB

Buck and Synchronous-Rectifier (PWM) Controller and Output Voltage Monitor

Intersil 

HIP6004A

+12V

VCC

+5V OR LESS

HIP6004A

BOOT

UGATE

PHASE

-

LGATE

+

PGND

GND

Q1

NOTE:

VG-S ≈ VCC -5V

Q2

D2

NOTE:

VG-S ≈ VCC

FIGURE 10. UPPER GATE DRIVE - DIRECT VCC DRIVE OPTION

Schottky Selection

Rectifier D2 is a clamp that catches the negative inductor

swing during the dead time between turning off the lower

MOSFET and turning on the upper MOSFET. The diode

must be a Schottky type to prevent the lossy parasitic

MOSFET body diode from conducting.

It is acceptable to omit the diode and let the body diode of

the lower MOSFET clamp the negative inductor swing, but

efficiency will drop one or two percent as a result. The

diode's rated reverse breakdown voltage must be greater

than the maximum input voltage

11

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