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參數(shù)資料
| 型號： | HIP6002 |
| 廠商： | Intersil Corporation |
| 英文描述： | Rectifier (PWM) Controller and Output Voltage Monitor(整流器PWM控制器和輸出電壓檢測器) |
| 中文描述： | 整流器（PWM）控制器和輸出電壓監(jiān)視器（整流器的PWM控制器和輸出電壓檢測器） |
| 文件頁數(shù)： | 6/12頁 |
| 文件大小： | 211K |
| 代理商： | HIP6002 |
6
inhibits PWM operation. The soft-start function recharges
C
SS
, and PWM operation resumes with the error amplifier
clamped to the SS voltage. Should an overload occur while
recharging C
SS
, the soft start function inhibits PWM operation
while fully charging C
SS
to 4V to complete its cycle. Figure 4
shows this 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. The maximum r
DS(ON)
at the highest junction
temperature.
2. The minimum I
OCSET
from the Specification Table.
3. Determine I
PEAK
for I
PEAK
> I
OUT(MAX)
+ (
I)/2, 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 HIP6002 converter is digitally
programmed to levels between 2VDC and 3.5VDC. The
voltage identification (VID) pins program an internal voltage
reference (DACOUT) with a 4-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 16 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 or inhibit the
converter (EN pin to GND) before changing the output voltage.
Adjusting the output voltage during operation could toggle the
PGOOD signal and exercise the overvoltage protection.
The DAC function is a precision non-inverting summation
amplifier shown in Figure 5. The resistor values shown are
only approximations of the actual precision values used.
Grounding any combination of the VID pins increases the
DACOUT voltage. The ‘open’ circuit voltage on the VID pins
is the band gap reference voltage, 1.26V.
O
S
0A
0V
TIME (20ms/DIV)
5A
10A
15A
2V
4V
FIGURE 4. OVER-CURRENT OPERATION
I
PEAK
R
---------------------------------------------------
=
TABLE 1. OUTPUT VOLTAGE PROGRAM
PIN NAME
NOMINAL
DACOUT
VOLTAGE
VID3
VID2
VID1
VID0
1
1
1
1
2.0
1
1
1
0
2.1
1
1
0
1
2.2
1
1
0
0
2.3
1
0
1
1
2.4
1
0
1
0
2.5
1
0
0
1
2.6
1
0
0
0
2.7
0
1
1
1
2.8
0
1
1
0
2.9
0
1
0
1
3.0
0
1
0
0
3.1
0
0
1
1
3.2
0
0
1
0
3.3
0
0
0
1
3.4
0
0
0
0
3.5
NOTE: 0 = connected to GND or V
SS
, 1 = OPEN.
HIP6002
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
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| HIP6003CB | 制造商:Rochester Electronics LLC 功能描述:PWM CONTROLLER - 16 LEADS SOIC - Bulk |
| HIP6003CB-T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Mode SMPS Controller |
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