hip6004a Intersil Corporation, hip6004a Datasheet - Page 11

• Manufacturer Part Number: hip6004a
• Description: Buck And Synchronous-rectifier Pwm Controller And Output Voltage Monitor
• Manufacturer: Intersil Corporation

Schottky Selection
Rectifier D
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.
2
is a clamp that catches the negative inductor
11
FIGURE 10. UPPER GATE DRIVE - DIRECT VCC DRIVE OPTION
HIP6004A
-
+
+12V
V
CC
GND
BOOT
UGATE
PHASE
LGATE
PGND
HIP6004A
Q1
Q2
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
+5V OR LESS
D2
NOTE:
V
NOTE:
V
G-S
G-S
≈
≈
VCC
VCC -5V