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| 型号： | HIP6021CBZ-T |
| 厂商： | Intersil |
| 文件页数： | 9/15页 |
| 文件大小： | 408K |
| 描述： | IC REG QD BCK/LINEAR 28-SOIC |
| 标准包装： | 1,000 |
| 拓扑： | 降压（降压）同步（1），线性（LDO）（3） |
| 功能： | 任何功能 |
| 输出数： | 4 |
| 频率 - 开关： | 215kHz |
| 电压/电流 - 输出 1： | 控制器 |
| 电压/电流 - 输出 2： | 控制器 |
| 电压/电流 - 输出 3： | 控制器 |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 无 |
| 电源电压： | 5 V ~ 12 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | * |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | * |
| 包装： | 带卷 (TR) |
9
A resistor (R
OCSET
) programs the over-current trip level for
the PWM converter. As shown in Figure 6, the internal
200礎 current sink, I
OCSET
develops a voltage across
R
OCSET
(V
SET
) that is referenced to V
IN
. The DRIVE
signal enables the over-current comparator (OVER-
CURRENT). 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
track the variations of V
IN
due to MOSFET
switching. The over-current function will trip at a peak
inductor current (I
PEAK)
determined by:
The OC trip point varies with MOSFETs r
DS(ON)
temperature variations. To avoid over-current tripping in the
normal operating load range, determine 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.
OUT1 Voltage Program
The output voltage of the PWM converter is programmed to
discrete levels between 1.3V
DC
and 3.5V
DC
. This output
(OUT1) is designed to supply the core voltage of Intels
advanced microprocessors. The voltage identification (VID)
pins program an internal voltage reference (DACOUT) with 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 an internal voltage of about 5V by a
10礎 current source. Changing the VID inputs during
operation is not recommended and could toggle the PGOOD
signal and exercise the over-voltage protection. 11111 VID
pin combination disables the IC and opens the PGOOD pin.
0A
0V
2V
4V
FIGURE 5. OVER-CURRENT OPERATION
TIME
T1
T2
T3
T0
T4
0V
10V
OVERLOAD
APPLIED
FAULT
REPORTED
COUNT
= 1
COUNT
= 2
COUNT
= 3
I
PEAK
=
I
OCSET
R
OCSET
?/DIV>
r
DS ON
( )
--------------------------------------------------- -
UGATE
OCSET
PHASE
OVER-
CURRENT
+
-
GATE
CONTROL
VCC
OC
200?/SPAN>A
V
DS
i
D
V
SET
R
OCSET
V
IN
= +5V
OVER-CURRENT TRIP:
I
OCSET
+
+
FIGURE 6. OVER-CURRENT DETECTION
PWM
DRIVE
i
D
r
DS ON
( )
?/DIV>
I
OCSET
R
OCSET
?/DIV>
>
V
DS
V
SET
>
V
PHASE
V
IN
V
DS
=
V
OCSET
V
IN
V
SET
=
TABLE 1. OUT1 VOLTAGE PROGRAM
PIN NAME
NOMINAL
DACOUT
VOLTAGE
VID4
VID3
VID2
VID1
VID0
0
1
1
1
1
1.30
0
1
1
1
0
1.35
0
1
1
0
1
1.40
0
1
1
0
0
1.45
0
1
0
1
1
1.50
0
1
0
1
0
1.55
0
1
0
0
1
1.60
0
1
0
0
0
1.65
0
0
1
1
1
1.70
0
0
1
1
0
1.75
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
0
HIP6021
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