HIP6005 INTERSIL [Intersil Corporation], HIP6005 Datasheet - Page 6

• Manufacturer Part Number: HIP6005
• Description: Buck Pulse-Width Modulator (PWM) Controller and Output Voltage Monitor
• Manufacturer: INTERSIL [Intersil Corporation]

The over-current function cycles the soft-start function in a
hiccup mode to provide fault protection. A resistor (R
programs the over-current trip level. An internal 200 A current
sink develops a voltage across R
V
referenced to V
over-current function initiates a soft-start sequence. The soft-
start function discharges C
inhibits PWM operation. The soft-start function recharges C
and PWM operation resumes with the error amplifier clamped
to the SS voltage. Should an overload occur while recharging
C
charging C
operation with an overload condition. Note that the inductor
current increases to over 15A during the C
and causes an over-current trip. The converter dissipates very
little power with this method. The measured input power for the
conditions of Figure 4 is 2.5W.
NOTE: 0 = connected to GND or V
For an equation for the ripple current see the section under
component guidelines titled “Output Inductor Selection.”
A small ceramic capacitor should be placed in parallel with
R
presence of switching noise on the input voltage.
Output Voltage Program
The output voltage of a HIP6005 converter is programmed to
discrete levels between 1.3V
IN
SS
OCSET
VID4
. When the voltage across the upper MOSFET (also
, the soft start function inhibits PWM operation while fully
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
to smooth the voltage across R
SS
VID3
to 4V to complete its cycle. Figure 4 shows this
IN
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
) exceeds the voltage across R
PIN NAME
VID2
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
SS
DC
with a 10 A current sink and
6
SS
OCSET
and 3.5V
, 1 = OPEN.
VID1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
that is referenced to
OCSET
SS
DC
charging interval
. The voltage
VID0
TABLE 1. OUTPUT VOLTAGE PROGRAM
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
OCSET
in the
OCSET
, the
NOMINAL
VOLTAGE
DACOUT
OUTPUT
1.30
1.35
1.40
1.45
1.50
1.55
1.60
1.65
1.70
1.75
1.80
1.85
1.90
1.95
2.00
2.05
SS
)
HIP6005
,
VID4
The over-current function will trip at a peak inductor current
(I
where I
typical). The OC trip point varies mainly due to the
MOSFETs r
in the normal operating load range, find the R
from the equation above with:
Determine I
where I is the output inductor ripple current.
identification (VID) pins program an internal voltage
reference (DACOUT) with a 5-bit digital-to-analog converter
(DAC). The level of DACOUT also sets the PGOOD and
OVP thresholds. Table 1 specifies the DACOUT voltage for
the 32 combinations of open or short connections on the VID
pins. The output voltage should not be adjusted while the
converter is delivering power. Remove input power before
changing the output voltage. Adjusting the output voltage
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
I
1. The maximum r
2. The minimum I
PEAK
PEAK)
I
PEAK
temperature.
=
OCSET
determined by:
VID3
I
-------------------------------------------------- -
I
OCSET
OUT MAX
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
PEAK
DS(ON)
r
DS ON
is the internal OCSET current source (200 A
PIN NAME
for ,
R
OCSET
VID2
DS(ON)
variations. To avoid over-current tripping
OCSET
+
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
I
from the specification table.
2
at the highest junction
VID1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
VID0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
OCSET
NOMINAL
VOLTAGE
DACOUT
OUTPUT
resistor
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5