参数资料
| 型号： | ISL6334AIRZR5368 |
| 厂商： | Intersil |
| 文件页数： | 23/31页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM 4PHASE BUCK 40QFN |
| 标准包装： | 50 |
| 应用： | 控制器，Intel VR11.1 |
| 输入电压： | 3 V ~ 12 V |
| 输出数： | 1 |
| 输出电压： | 0.5 V ~ 1.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-VFQFN 裸露焊盘 |
| 供应商设备封装： | 40-QFN（6x6） |
| 包装： | 管件 |
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ISL6334AR5368
There are two comparators with hysteresis to compare the
TM pin voltage to the fixed thresholds for VR_FAN and
VR_HOT signals respectively. The VR_FAN signal is set to
high when the TM voltage is lower than 39.1% of VCC
voltage, and is pulled to GND when the TM voltage
increases to above 45.1% of VCC voltage. The VR_FAN
signal is set to high when the TM voltage goes below 33.3%
of VCC voltage, and is pulled to GND when the TM voltage
goes back to above 39.1% of VCC voltage. Figure 14 shows
TM
0.451*Vcc
0.391*Vcc
0.333*Vcc
VR_FAN
the operation of those signals.
VR_HOT
TEMPERATURE
T1
T2
T3
FIGURE 14. VR_HOT AND VR_FAN SIGNAL vs TM VOLTAGE
VCC
VR_FAN
Based on the NTC temperature characteristics and the
desired threshold of the VR_HOT signal, the pull-up resistor
RTM1 of TM pin is given by Equation 18:
R TM1 = 2.75xR NTC ( T3 )
(EQ. 18)
R TM1
TM
0.391V CC
VR_HOT
R NTC(T3) is the NTC resistance at the VR_HOT threshold
temperature T3.
o c
R NTC
0.333V CC
The NTC resistance at the set point T2 and release point T1 of
VR_FAN signal can be calculated as shown in Equations 19
and 20:
FIGURE 12. BLOCK DIAGRAM OF THERMAL MONITORING
FUNCTION
R NTC ( T2 ) = 1.267xR NTC ( T3 )
R NTC ( T1 ) = 1.644xR NTC ( T3 )
(EQ. 19)
(EQ. 20)
With the NTC resistance value obtained from Equations 19
100
90
80
70
60
50
40
and 20, the temperature value T2 and T1 can be found from
the NTC datasheet.
Temperature Compensation
The ISL6334AR5368 supports inductor DCR sensing, or
resistive sensing techniques. The inductor DCR has a
positive temperature coefficient, which is about +0.385%/°C.
Since the voltage across inductor is sensed for the output
30
20
0
20
40
60
80
100
120
140
current information, the sensed current has the same
positive temperature coefficient as the inductor DCR.
In order to obtain the correct current information, there
TEMPERATURE (°C)
FIGURE 13. THE RATIO OF TM VOLTAGE TO NTC
TEMPERATURE WITH RECOMMENDED PARTS
23
should be a way to correct the temperature impact on the
current sense component. ISL6334AR5368 provides two
methods: integrated temperature compensation and external
temperature compensation.
Integrated Temperature Compensation
When the TCOMP voltage is equal or greater than VCC/15,
ISL6334AR5368 will utilize the voltage at TM and TCOMP pins
to compensate the temperature impact on the sensed current.
The block diagram of this function is shown in Figure 15.
FN6839.2
September 7, 2010
相关PDF资料 |
PDF描述 |
|---|---|
| ISL6334BIRZ-T | IC CTRLR PWM SYNC BUCK 40-QFN |
| ISL6334CRZ | IC CTRLR PWM 4PHASE BUCK 40-QFN |
| ISL6334DIRZ | IC CTRLR PWM 4PHASE VR11.1 40QFN |
| ISL6336BCRZ | IC CTRLR PWM SYNC BUCK 48-QFN |
| ISL6336IRZ | IC CTRLR PWM 6PHASE BUCK 48-QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6334AIRZ-T | 功能描述:IC CTRLR PWM 4PHASE BUCK 40-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| ISL6334AIRZ-TR5368 | 功能描述:IC CTRLR PWM 4PHASE BUCK 40QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| ISL6334BCRZ | 功能描述:IC CTRLR PWM SYNC BUCK 40-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| ISL6334BCRZ-T | 功能描述:IC CTRLR PWM SYNC BUCK 40-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| ISL6334BIRZ | 功能描述:IC CTRLR PWM SYNC BUCK 40-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
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