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参数资料
| 型号： | HIP6301VCBZ-T |
| 厂商： | INTERSIL CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 100000 SYSTEM GATE 1.8 VOLT FPGA - NOT RECOMMENDED for NEW DESIGN |
| 中文描述： | SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | LEAD FREE, PLASTIC, MS-013AC, SOIC-20 |
| 文件页数： | 13/20页 |
| 文件大小： | 518K |
| 代理商： | HIP6301VCBZ-T |
13
FN9034.2
December 27, 2004
Current Sensing and Balancing
Overview
The HIP6301V and HIP6302V sample the on-state voltage
drop across each synchronous MOSFET, Q2, as an
indication of the inductor current in that phase, see Figure 9.
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 through the 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
Over-Current, 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 9. SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM SHOWING CURRENT AND VOLTAGE SAMPLING
CURRENT
SENSING
COMPARATOR
PWM
CIRCUIT
AVERAGING
CURRENT
SENSING
FROM
OTHER
CHANNELS
SAWTOOTH
GENERATOR
+
DIFFERENCE
RISEN
+
CORRECTION
ERROR
AMPLIFIER
FB
COMP
REFERENCE
DAC
TO OTHER
CHANNELS
ISEN
RIN
RFB
Cc
VCORE
Q1
Q2
COMPARATOR
REFERENCE
TO OVER
CURRENT
TRIP
L01
PHASE
INDUCTOR
CURRENT(S)
FROM
OTHER
CHANNELS
PWM
IL
HIP6301V
C
R
VIN
ONLY ONE OUTPUT
STAGE SHOWN
HIP6601
-
-
-
+
-
+
-
+
r
------------------------------------
Q2
(
)
=
R
ISEN
(
----------------------------------------------
)
r
Q2
(
)
=
HIP6301V, HIP6302V
相关PDF资料 |
PDF描述 |
|---|---|
| HIP6301VCBZA | Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| HIP6301VCBZA-T | 150000 SYSTEM GATE 2.5 VOLT FPGA - NOT RECOMMENDED for NEW DESIGN |
| HIP6301V | Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| HIP6301VCB | Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| HIP6301VCB-T | Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
相关代理商/技术参数 |
参数描述 |
|---|---|
| HIP6302 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| HIP6302_04 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| HIP6302CB | 功能描述:IC REG CTRLR BUCK PWM 16-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| HIP6302CB-T | 功能描述:电流型 PWM 控制器 MPU CORE Volt Reg RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| HIP6302CB-TS2495 | 制造商:Intersil Corporation 功能描述:SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PDSO16 |
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