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参数资料
| 型号： | HIP6019CB |
| 厂商： | HARRIS SEMICONDUCTOR |
| 元件分类： | 稳压器 |
| 英文描述： | Advanced Dual PWM and Dual Linear Power Control |
| 中文描述： | DUAL SWITCHING CONTROLLER, 215 kHz SWITCHING FREQ-MAX, PDSO28 |
| 文件页数： | 9/15页 |
| 文件大小： | 152K |
| 代理商： | HIP6019CB |
2-260
Resistors (R
OCSET1
and R
OCSET2
) program the over-
current trip levels for each PWM converter. As shown in
Figure 9, the internal 200
μ
A current sink develops a voltage
across R
OCSET
(V
SET
) that is referenced to V
IN
. The DRIVE
signal enables the over-current comparator (OVER-
CURRENT1 or OVER-CURRENT2). When the voltage
across the upper MOSFET (V
DS
) exceeds V
SET
, the over-
current comparator trips to set the over-current latch. Both
V
SET
and V
DS
are referenced to V
IN
and a small capacitor
across R
OCSET
helps V
OCSET
trackthe variations of V
IN
due
to MOSFET switching. The over-current function will trip at a
peak inductor current (I
PEAK)
determined by:
I
DS ON
)
The OC trip point varies with MOSFET’s temperature. To avoid
over-current tripping in the normal operating load range,
determine 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 I
PEAK
> I
OUT(MAX)
+ (
I)/2,
where
I is the output inductor ripple current.
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 PWM1 converter is programmed to
discrete levels between 1.8V
DC
and 3.5V
DC
. This output is
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, because they are
internally pulled up to +5V by a 10
μ
A 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. All
VIDpincombinationsresultinginanINHIBITdisabletheICand
the open-collector at the PGOOD pin.
Application Guidelines
Soft-Start Interval
Initially, the soft-start function clamps the error amplifiers’
output of the PWM converters. After the output voltage
increases to approximately 80% of the set value, the
reference input of the error amplifier is clamped to a voltage
proportional to the SS pin voltage. The resulting output
voltage sequence is shown in Figure 6.
The soft-start function controls the output voltage rate of rise
to limit the current surge at start-up. The soft-start interval is
programmed by the soft-start capacitor, C
SS
. Programming
a faster soft-start interval increases the peak surge current.
The peak surge current occurs during the initial output
voltage rise to 80% of the set value.
Shutdown
Neither PWM output switches until the soft-start voltage
(V
SS
) exceeds the oscillator’s valley voltage. Additionally, the
reference on each linear’s amplifier is clamped to the soft-
start voltage. Holding the SS pin low (with an open drain or
collector signal) turns off all four regulators.
The VID codes resulting in an INHIBIT as shown in Table 1
also shut down the IC.
UGATE
OCSET
PHASE
OVER-
CURRENT2
+
-
GATE
CONTROL
VCC
OC2
200
μ
A
V
DS
I
D
V
SET
R
OCSET
V
IN
= +5V
OVER-CURRENT TRIP: V
DS
> V
SET
(I
D
r
DS(ON)
> I
OCSET
R
OCSET
)
I
OCSET
+
+
FIGURE 9. OVER-CURRENT DETECTION
PWM
V
PHASE
= V
IN
- V
DS
V
OCSET
= V
IN
- V
SET
DRIVE
HIP6019
I
PEAK
=
R
×
---------------------------------------------------
TABLE 1. V
OUT1
VOLTAGE PROGRAM
PIN NAME
NOMINAL
OUT1
VOLTAGE
DACOUT
VID4
VID3
VID2
VID1
VID0
0
1
X
X
X
INHIBIT
0
0
1
1
X
INHIBIT
0
0
1
0
1
1.80
0
0
1
0
0
1.85
0
0
0
1
1
1.90
0
0
0
1
0
1.95
0
0
0
0
1
2.00
0
0
0
0
0
2.05
1
1
1
1
1
INHIBIT
1
1
1
1
0
2.1
1
1
1
0
1
2.2
1
1
1
0
0
2.3
1
1
0
1
1
2.4
1
1
0
1
0
2.5
1
1
0
0
1
2.6
HIP6019
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相关代理商/技术参数 |
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|---|---|
| HIP6019CB-T | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HIP6019EVAL1 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Advanced Dual PWM and Dual Linear Power Control |
| HIP6020 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Advanced Dual PWM and Dual Linear Power Controller |
| HIP6020A | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Advanced Dual PWM and Dual Linear Power Controller |
| HIP6020A_01 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Advanced Dual PWM and Dual Linear Power Controller |
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