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参数资料
| 型号： | HIP6014 |
| 厂商： | Intersil Corporation |
| 英文描述： | Buck and Synchronous-Rectifier (PWM) Controller and Output Voltage Monitor |
| 中文描述： | 巴克和同步整流（PWM）控制器和输出电压监视器 |
| 文件页数： | 6/12页 |
| 文件大小： | 211K |
| 代理商： | HIP6014 |
6
operation with an overload condition. Note that the inductor
current increases to over 15A during the C
SS
charging interval
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.
The over-current function will trip at a peak inductor current
(I
PEAK)
determined by:
I
DS ON
)
where I
OCSET
is the internal OCSET current source (200
μ
A
typical). The OC trip point varies mainly due to the
MOSFET’s r
DS(ON)
variations. To avoid over-current tripping
in the normal operating load range, find the R
OCSET
resistor
from the equation above with:
1. Themaximumr
DS(ON)
atthehighestjunctiontemperature.
2. The minimum I
OCSET
from the specification table.
3. Determine I
PEAK
for
where
I is the output inductor ripple current.
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
OCSET
to smooth the voltage across R
OCSET
in the
presence of switching noise on the input voltage.
Output Voltage Program
The output voltage of a HIP6014 converter is programmed
to discrete levels between 1.8V
DC
and 3.5V
DC
. The
voltage identification (VID) pins program an internal voltage
reference (DACOUT) with a TTL-compatible 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 different combinations of
connections on the VID pins. The output voltage should not
be adjusted while the converter is delivering power.
O
S
0A
0V
TIME (20ms/DIV.)
5A
10A
15A
2V
4V
FIGURE 4. OVER-CURRENT OPERATION
I
PEAK
R
---------------------------------------------------
=
I
PEAK
I
OUT MAX
)
I
(
)
2
+
>
TABLE 1. OUTPUT VOLTAGE PROGRAM
PIN NAME
NOMINAL OUTPUT
VOLTAGE DACOUT
PIN NAME
NOMINAL OUTPUT
VOLTAGE DACOUT
VID4
VID3
VID2
VID1
VID0
VID4
VID3
VID2
VID1
VID0
0
1
1
1
1
0
1
1
1
1
1
0
0
1
1
1
0
0
1
1
1
1
0
2.1
0
1
1
0
1
0
1
1
1
0
1
2.2
0
1
1
0
0
0
1
1
1
0
0
2.3
0
1
0
1
1
0
1
1
0
1
1
2.4
0
1
0
1
0
0
1
1
0
1
0
2.5
0
1
0
0
1
0
1
1
0
0
1
2.6
0
1
0
0
0
0
1
1
0
0
0
2.7
0
0
1
1
1
0
1
0
1
1
1
2.8
0
0
1
1
0
0
1
0
1
1
0
2.9
0
0
1
0
1
1.80
1
0
1
0
1
3.0
0
0
1
0
0
1.85
1
0
1
0
0
3.1
0
0
0
1
1
1.90
1
0
0
1
1
3.2
0
0
0
1
0
1.95
1
0
0
1
0
3.3
0
0
0
0
1
2.00
1
0
0
0
1
3.4
0
0
0
0
0
2.05
1
0
0
0
0
3.5
NOTE: 0 = connected to GND or V
SS
, 1 = connected to V
DD
through pull-up resistors
HIP6014
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