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參數(shù)資料
| 型號(hào)： | HIP6303CB |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| 中文描述： | SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | PLASTIC, MS-013AC, SOIC-20 |
| 文件頁(yè)數(shù)： | 12/17頁(yè) |
| 文件大?。?/td> | 195K |
| 代理商： | HIP6303CB |
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12
Droop, Selection of R
IN
The average of the currents detected through the R
ISEN
resistors is also steered to the FB pin. There is no DC return
path connected to the FB pin except for R
IN
, so the average
current creates a voltage drop across R
IN
. This drop
increases the apparent V
CORE
voltage with increasing load
current, causing the system to decrease V
CORE
to maintain
balance at the FB pin. This is the desired “droop” voltage
used to maintain V
CORE
within limits under transient
conditions.
With a high dv/dt load transient, typical of high performance
microprocessors, the largest deviations in output voltage
occur at the leading and trailing edges of the load transient.
In order to fully utilize the output-voltage tolerance range, the
output voltage is positioned in the upper half of the range
when the output is unloaded and in the lower half of the
range when the controller is under full load. This droop
compensation allows larger transient voltage deviations and
thus reduces the size and cost of the output filter
components.
R
IN
should be selected to give the desired “droop” voltage at
the normal full load current 50
μ
A applied through the R
ISEN
resistor (or at a different full load current if adjusted as under
“Over-Current, Selecting R
ISEN
” above).
R
IN
= Vdroop / 50
μ
A
For a Vdroop of 80mV, R
IN
= 1.6k
A resistor from the feedback pin to ground raises the output
voltage above VID when the output is unloaded. The offset
resistor, (R
os
), is selected based on R
IN
and the amount of
desired no-load offset, (VOS).
R
os
= R
IN
x VID / VOS
Current Balancing
The detected currents are also used to balance the channel
currents.
Each channel’s current is compared to the average of all
channel currents, and the difference is used to create an
offset in that channel’s PWM comparator. The offset is in a
direction to reduce the imbalance.
The balancing circuit can not make up for a difference in
r
DS(ON)
between synchronous rectifiers. If a FET has a
higher r
DS(ON)
, the current through that channel will be
reduced.
Figures 8 and 9 show the inductor current of a two channel
system without and with current balancing.
Inductor Current
The inductor current in each channel of a multi-phase Buck
converter has two components. There is a current equal to
the load current divided by the number of channels (I
LT
/ n),
and a sawtooth current, (i
PK-PK
) resulting from switching.
The sawtooth component is dependent on the size of the
inductors, the switching frequency of each channel, and the
values of the input and output voltage. Ignoring secondary
effects, such as series resistance, the peak to peak value of
the sawtooth current can be described by:
i
PK-PK
= (V
IN
x V
CORE
- V
CORE2
) / (L x F
SW
x V
IN
)
Where: V
CORE
= DC value of the output or V
ID
voltage
V
IN
= DC value of the input or supply voltage
L = value of the inductor
F
SW
= switching frequency
Example: For V
CORE
=1.6V,
V
IN
=12V,
L =1.3
μ
H,
F
SW
= 250kHz,
Then i
PK-PK
= 4.3A
0
5
10
15
20
25
A
FIGURE 8. TWO CHANNEL MULTIPHASE SYSTEM WITH
CURRENT BALANCING DISABLED
0
5
10
15
20
25
A
FIGURE 9. TWO CHANNEL MULTIPHASE SYSTEM WITH
CURRENT BALANCING ENABLED
HIP6303
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HIP6303EVAL1 | Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| HIP6304CB-T | Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| HIP6304 | Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller(微處理器核心電壓穩(wěn)壓器多相PWM控制電路) |
| HIP6304CB | 150000 SYSTEM GATE 2.5 VOLT FPGA - NOT RECOMMENDED for NEW DESIGN |
| HIP6304EVAL1 | Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HIP6303CB WAF | 制造商:Harris Corporation 功能描述: |
| HIP6303CB-T | 功能描述:IC REG CTRLR BUCK PWM 20-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| HIP6303EVAL1 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| HIP6304 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| HIP6304 WAF | 制造商:Intersil Corporation 功能描述: |
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