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参数资料
| 型号： | HIP6301CBZ |
| 厂商： | Intersil |
| 文件页数： | 12/17页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 20-SOIC |
| 标准包装： | 380 |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 336kHz |
| 占空比： | 75% |
| 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： | 0°C ~ 70°C |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 包装： | 管件 |
HIP6301
R IN
R FB
C c
FB
COMP
HIP6301
V IN
ERROR
AMPLIFIER
-
SAWTOOTH
GENERATOR
CORRECTION
+
COMPARATOR
-
+
PWM
CIRCUIT
PWM
HIP6601B
Q1
L 01
I L
V CORE
+
-
Q2
PHASE
REFERENCE
DAC
DIFFERENCE
+
CURRENT
I SEN
R ISEN
SENSING
-
ONLY ONE OUTPUT
TO OTHER
CHANNELS
AVERAGING
CURRENT
SENSING
FROM
OTHER
CHANNELS
STAGE SHOWN
INDUCTOR
CURRENT(S)
FROM
OTHER
TO OVER
CURRENT
TRIP
+
-
COMPARATOR
REFERENCE
CHANNELS
FIGURE 7. SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM SHOWING CURRENT AND VOLTAGE SAMPLING
( I ) r ( Q2 )
Therefore, R ISEN = ---------------------------------------------- .
through R ISEN is I = r ------------------------------------ )
R ISEN
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
DS ( ON ) ( Q2
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
12
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
L DS ( ON )
50 μ A
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
FN4765.6
December 27, 2004
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相关代理商/技术参数 |
参数描述 |
|---|---|
| HIP6301CBZA-T | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| HIP6301CBZ-T | 功能描述:电流型 PWM 控制器 FLEXIBLE 2-4 PHS SYNCH BUCK CNTRLR 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 |
| HIP6301EVAL1 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| HIP6301EVAL2 | 功能描述:电源管理IC开发工具 HIP6301 EVAL BRD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| HIP6301V | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
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