HIP6004EVAL3 Intersil, HIP6004EVAL3 Datasheet - Page 10

• Manufacturer Part Number: HIP6004EVAL3
• Description: EVALUATION BOARD EMBED HIP6004
• Manufacturer: Intersil

Specifications of HIP6004EVAL3

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 1.3 ~ 3.5V
• Current - Output: 14A
• Voltage - Input: 5 ~ 12V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: HIP6004
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Frequency - Switching: -

Figure 10 shows the upper gate drive (BOOT pin) supplied
by a bootstrap circuit from V
develops a floating supply voltage referenced to the PHASE
pin. This supply is refreshed each cycle to a voltage of VCC
less the boot diode drop (V
turns on. Logic-level MOSFETs can only be used if the
MOSFETs absolute gate-to-source voltage rating exceeds
the maximum voltage applied to V
Figure 11 shows the upper gate drive supplied by a direct
connection to V
converter systems where the main input voltage is +5V
less. The peak upper gate-to-source voltage is approximately
V
for the bias, the gate-to-source voltage of Q1 is 7V. A logic-
level MOSFET is a good choice for Q1 and a logic-level
MOSFET can be used for Q2 if its absolute gate-to-source
voltage rating exceeds the maximum voltage applied to V
CC
FIGURE 10. UPPER GATE DRIVE - BOOTSTRAP OPTION
HIP6004
+
-
less the input supply. For +5V main power and +12VDC
VCC
+12V
CC
+ V
GND
D
. This option should only be used in
BOOT
BOOT
UGATE
PHASE
LGATE
PGND
D
-
D
C
CC
) when the lower MOSFET, Q2
BOOT
10
. The boot capacitor, C
CC
Q1
Q2
+5V or +12V
.
D2
NOTE:
V
NOTE:
V
G-S
G-S
≈
≈
V
V
CC
CC
DC
BOOT
-V
CC
D
or
HIP6004
.
FIGURE 11. UPPER GATE DRIVE - DIRECT V
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.
HIP6004
-
+
+12V
V
CC
GND
BOOT
UGATE
PHASE
LGATE
PGND
Q1
Q2
+5V OR LESS
D2
CC
NOTE:
V
NOTE:
V
G-S
DRIVE OPTION
G-S
≈
≈
V
V
CC
CC
-5V