HIP6028EVAL1 INTERSIL [Intersil Corporation], HIP6028EVAL1 Datasheet - Page 9

• Manufacturer Part Number: HIP6028EVAL1
• Description: Advanced PWM and Dual Linear Power Control with Integrated ACPI Support Interface
• Manufacturer: INTERSIL [Intersil Corporation]

of V
will trip at a peak inductor current (I
The OC trip point varies with MOSFET’s temperature. To avoid
over-current tripping in the normal operating load range,
determine the R
For an equation for the output inductor ripple current see the
section under component guidelines titled ‘Output Inductor
Selection’.
OUT1 Voltage Program
The output voltage of the PWM converter is programmed to
discrete levels between 1.3V
designed to supply the microprocessor core voltage. The
voltage identification (VID) pins program an internal voltage
reference (DACOUT) through a TTL-compatible 5-bit digital-
to-analog converter. The level of DACOUT also sets the
PGOOD and OVP thresholds. Table 1 specifies the
DACOUT voltage for the different combinations of
connections on the VID pins. The VID pins can be left open
for a logic 1 input, since they are internally pulled up to +5V
by a 10 A (typically) current source. Changing the VID
inputs during operation is not recommended. The sudden
change in the resulting reference voltage could toggle the
PGOOD signal and exercise the over-voltage protection or
cause an over-current event. ‘11111’ VID pin combination
disables the IC and drives ‘on’ the otherwise open-collector
at the PGOOD pin.
I
PEAK
2. The minimum I
3. Determine I
1. The maximum r
CURRENT1
OC1
HIP6028
OVER-CURRENT TRIP: V
OVER-
where I is the output inductor ripple current.
IN
(i
D
PWM
due to MOSFET switching. The over-current function
=
• r
I
--------------------------------------------------- -
DS
OCSET
+
-
FIGURE 9. OVER-CURRENT DETECTION
(ON) > I
CONTROL
r
DS ON
GATE
OCSET
PEAK
OCSET
R
OCSET
DS(ON)
OCSET
DRIVE
I
for I
OCSET
200 A
resistor from the equation above with:
• R
DS
PEAK
2-319
OCSET
from the specification table.
at the highest junction temperature.
> V
DC
SET
VCC
VCC
)
> I
OCSET
UGATE
PHASE
and 3.5V
LGATE
PGND
OUT(MAX)
PEAK)
DC
determined by:
V
V
R
V
OCSET
PHASE
OCSET
SET
+ ( I)/2,
. This output is
+
= V
= V
V
IN
IN
IN
I
D
+
- V
- V
V
= +5V
DS
SET
DS
HIP6028
NOTE: 0 = connected to GND or V
through pull-up resistors
VID4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
TABLE 1. V
VID3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
PIN NAME
VID2
OUT1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
VOLTAGE PROGRAM
SS
VID1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
, 1 = open or connected to 5V
VID0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
NOMINAL
VOLTAGE
DACOUT
INHIBIT
OUT1
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
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