參數(shù)資料
型號(hào)： HIP6301EVAL2
廠商： Intersil Corporation
英文描述： Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller
中文描述： 微處理器核心電壓調(diào)節(jié)器的多相降壓PWM控制器
文件頁(yè)數(shù)： 12/17頁(yè)
文件大小： 406K
代理商： HIP6301EVAL2
12
FN4765.6
December 27, 2004
Current Sensing and Balancing
Overview
The HIP6301 samples the on-state voltage drop across each
synchronous rectifier FET, Q2, as an indication of the
inductor current in that phase, see Figure 7. Neglecting AC
effects (to be discussed later), the voltage drop across Q2 is
simply r
DS(ON)
(Q2) x
inductor current (I
L
). Note that I
L
, the
inductor current, is either 1/2, 1/3, or 1/4 of the total current
(I
LT
), depending on how many phases are in use.
The voltage at Q2’s drain, the PHASE node, is applied to the
R
ISEN
resistor to develop the I
ISEN
current to the HIP6301
ISEN pin. This pin is held at virtual ground, so the current
through R
ISEN
is
I
L
The I
ISEN
current provides information to perform the
following functions:
1. Detection of an overcurrent condition
2. Reduce the regulator output voltage with increasing load
current (droop)
3. Balance the I
L
currents in multiple channels
Overcurrent, Selecting R
ISEN
The current detected through the R
ISEN
resistor is averaged
with the current(s) detected in the other 1, 2, or 3 channels.
The averaged current is compared with a trimmed,
internally
generated current, and used to detect an overcurrent
condition.
The nominal current through the R
ISEN
resistor should be
50
μ
A at full output load current, and the nominal trip point for
overcurrent detection is 165% of that value, or 82.5
μ
A
I
Therefore,
.
For a full load of 25A per phase, and an r
DS(ON)
(Q2) of
4m
, R
ISEN
= 2k
.
The overcurrent trip point would be 165% of 25A, or ~ 41A
per phase. The R
ISEN
value can be adjusted to change the
overcurrent trip point, but it is suggested to stay within
±
25%
of nominal.
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
FIGURE 7. SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM SHOWING CURRENT AND VOLTAGE SAMPLING
CURRENT
SENSING
COMPARATOR
PWM
CIRCUIT
AVERAGING
CURRENT
SENSING
FROM
OTHER
CHANNELS
SAWTOOTH
GENERATOR
+
DIFFERENCE
R
ISEN
+
CORRECTION
ERROR
AMPLIFIER
FB
COMP
REFERENCE
DAC
TO OTHER
CHANNELS
I
SEN
R
IN
R
FB
C
c
V
CORE
Q1
Q2
COMPARATOR
REFERENCE
TO OVER
CURRENT
TRIP
L
01
PHASE
INDUCTOR
CURRENT(S)
FROM
OTHER
CHANNELS
PWM
I
L
HIP6301
C
O
R
L
V
IN
ONLY ONE OUTPUT
STAGE SHOWN
HIP6601B
-
-
-
+
-
+
-
+
r
------------------------------------
Q2
(
)
=
R
ISEN
(
----------------------------------------------
)
r
Q2
(
)
=
HIP6301
相關(guān)PDF資料
PDF描述
HIP6301 Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller(微處理器核心電壓穩(wěn)壓多相沖跳脈寬調(diào)制控制器)
HIP6301CB Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller
HIP6301CB-T Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller
HIP6301EVAL1 Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller
HIP6302CBZ 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
HIP6301V 制造商:INTERSIL 制造商全稱(chēng):Intersil Corporation 功能描述:Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller
HIP6301VCB 功能描述:IC REG CTRLR BUCK PWM 20-SOIC RoHS:否 類(lèi)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(pán) 包裝:帶卷 (TR)
HIP6301VCB-T 功能描述:IC REG CTRLR BUCK PWM 20-SOIC RoHS:否 類(lèi)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(pán) 包裝:帶卷 (TR)
HIP6301VCB-TS2490 制造商:Intersil Corporation 功能描述:
HIP6301VCBZ 功能描述:電流型 PWM 控制器 MULTI-PHS CNTRLR VID ON THE FLYINTEL VID RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
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