- 您现在的位置：买卖IC网 > PDF目录15176 > ISL6316CRZ-T (Intersil)IC REG CTRLR BUCK PWM VM 40-QFN PDF资料下载
参数资料
| 型号： | ISL6316CRZ-T |
| 厂商： | Intersil |
| 文件页数： | 14/29页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 40-QFN |
| 标准包装： | 4,000 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 275kHz |
| 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： | 0°C ~ 70°C |
| 封装/外壳： | 40-VFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页当前第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
ISL6316
I ( s )
L
V IN
L
L
DCR
V OUT
L
I
R SENSE V OUT
C OUT
ISL6605
INDUCTOR
V L
V C (s)
C OUT
ISL6316 INTERNAL CIRCUIT
I n
R ISEN(n)
PWM(n)
R
C
SAMPLE
&
HOLD
ISEN-(n)
ISL6316 INTERNAL CIRCUIT
R ISEN(n)
+
-
ISEN+(n)
I n
SAMPLE
(PTC)
I
R
R SENSE
SEN = I L --------------------------
ISEN
&
HOLD
+
ISEN-(n)
FIGURE 5. SENSE RESISTOR IN SERIES WITH INDUCTORS
I SEN = I ------------------
L R
-
DCR
ISEN
ISEN+(n)
MOSFET r DS(ON) SENSING
The controller can also sense the channel load current by
sampling the voltage across the lower MOSFET r DS(ON) (see
Figure 6). The amplifier is ground-reference by connecting the
ISEN- pin to the source of the lower MOSFET. ISEN+ pin is
connected to the PHASE node through the current sense
FIGURE 4. DCR SENSING CONFIGURATION
With the internal low-offset current amplifier, the capacitor
voltage V C is replicated across the sense resistor R ISEN .
Therefore the current out of ISEN+ pin, I SEN , is proportional
resistor R ISEN . The voltage across R ISEN is equivalent to the
voltage drop across the r DS(ON) of the lower MOSFET while it
is conducting. The resulting current out of the ISEN+ pin is
proportional to the channel current I L.
I SEN = I ------------------------- ) -
L R
to the inductor current.
Equation 5 shows that the ratio of the channel current to the
sensed current I SEN is driven by the value of the sense
resistor and the DCR of the inductor.
I n
SAMPLE
r DS ( ON
ISEN
V IN
I L
I SEN = I L ? ------------------
DCR
R ISEN
RESISTIVE SENSING
(EQ. 5)
&
HOLD
-
ISEN+(n)
R ISEN
(PTC)
ISEN-(n)
-
I L x r DS ( ON )
+
For accurate current sense, a dedicated current-sense
resistor R SENSE in series with each output inductor can serve
as the current sense element (see Figure 5). This technique is
+
N-CHANNEL
MOSFETs
more accurate, but reduces overall converter efficiency due to
the additional power loss on the current sense element
ISL6316 INTERNAL CIRCUIT
EXTERNAL CIRCUIT
R SENSE .
Equation 6 shows the ratio of the channel current to the
sensed current I SEN .
FIGURE 6. MOSFET r DS(ON) CURRENT-SENSING CIRCUIT
Equation 7 shows the ratio of the channel current to the
sensed current I SEN .
I SEN = I L ? -----------------------
I SEN = I L ---------------------- )
R SENSE
R ISEN
(EQ. 6)
r DS ( ON
R ISEN
(EQ. 7)
Both inductor DCR and MOSFET r DS(ON) value will increase
as the temperature increases. Therefore the sensed current
will increase as the temperature of the current sense element
increases. In order to compensate the temperature effect on
the sensed current signal, a Positive Temperature Coefficient
(PTC) resistor can be selected for the sense resistor R ISEN ,
14
FN9227.1
December 12, 2006
相关PDF资料 |
PDF描述 |
|---|---|
| VI-B4P-EV-F1 | CONVERTER MOD DC/DC 13.8V 150W |
| H2BBT-10112-G8-ND | JUMPER-H1500TR/A3048G/H1500TR12" |
| HIP6301VCBZ-T | IC REG CTRLR BUCK PWM 20-SOIC |
| VI-B4N-EV-F4 | CONVERTER MOD DC/DC 18.5V 150W |
| VI-B4N-EV-F2 | CONVERTER MOD DC/DC 18.5V 150W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6316IRZ | 功能描述:软开关 PWM 控制器 W/ANNEAL 4-PHS VR11 CNTRLR INDUSTRIAL RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| ISL6316IRZ-T | 功能描述:软开关 PWM 控制器 W/ANNEAL ISL6306 CNTRLR INDUSTRIAL RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| ISL6322CRZ | 功能描述:IC CTRLR PWM 4PHASE BUCK 48-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| ISL6322CRZ-T | 功能描述:IC CTRLR PWM 4PHASE BUCK 48-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| ISL6322GCRZ | 功能描述:IC CTRLR PWM BUCK 48-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:2,000 系列:- 应用:控制器，DSP 输入电压:4.5 V ~ 25 V 输出数:2 输出电压:最低可调至 1.2V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:30-TFSOP（0.173"，4.40mm 宽） 供应商设备封装:30-TSSOP 包装:带卷 (TR) |
发布紧急采购，3分钟左右您将得到回复。