参数资料
| 型号： | ISL6313CRZ-T |
| 厂商： | Intersil |
| 文件页数： | 26/33页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM 2PHASE BUCK 36-QFN |
| 产品培训模块： | Solutions for Industrial Control Applications |
| 标准包装： | 4,000 |
| 应用： | 控制器，Intel VR11，AMD CPU |
| 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： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 供应商设备封装： | 36-TQFN 裸露焊盘（6x6） |
| 包装： | 带卷 (TR) |
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ISL6313
PVCC
BOOT
C GD
D
Inductor DCR Current Sensing Component
Selection
The ISL6313 senses each individual channel’s inductor
current by detecting the voltage across the output inductor
R HI1
R LO1
UGATE
G
R G1
R GI1
C GS
C DS
Q 1
DCR of that channel (As described in the “Continuous Current
network is required to accurately sense the inductor DCR
voltage and convert this information into a current, which is
S
PHASE
FIGURE 18. TYPICAL UPPER-GATE DRIVE TURN-ON PATH
PVCC
D
proportional to the total output current. The time constant of
this R-C network must match the time constant of the inductor
L/DCR.
Follow the steps below to choose the component values for
this RC network.
1. Choose an arbitrary value for C 1 . The recommended
R 1 = -------------------------
R HI2
R LO2
LGATE
G
R G2
C GD
R GI2
C GS
S
C DS
Q 2
value is 0.1μF.
2. Plug the inductor L and DCR component values, and the
value for C 1 chosen in step 1 into Equation 34, to
calculate the value for R 1 .
L (EQ. 34)
DCR ? C 1
Once the R-C network components have been chosen, the
effective internal R ISEN resistance must then be set. The
FIGURE 19. TYPICAL LOWER-GATE DRIVE TURN-ON PATH
The total gate drive power losses are dissipated among the
resistive components along the transition path and in the
bootstrap diode. The portion of the total power dissipated in
the controller itself is the power dissipated in the upper drive
R ISEN resistance sets the gain of the load line regulation
loop as well as the gain of the channel-current balance loop
and the overcurrent trip level. The effective internal R ISEN
resistance is set through a single resistor on the RSET pin,
R SET .
path resistance, P DR_UP , the lower drive path resistance,
V IN
IL
P DR_UP , and in the boot strap diode, P BOOT . The rest of the
power will be dissipated by the external gate resistors (R G1
MOSFET
UGATE
L
DCR
V OUT
and R G2 ) and the internal gate resistors (R GI1 and R GI2 ) of
the MOSFETs. Figures 18 and 19 show the typical upper and
DRIVER
LGATE
INDUCTOR
V L (s)
C OUT
lower gate drives turn-on transition path. The total power
dissipation in the controller itself, P DR , can be roughly
V C (s)
estimated as Equation 33:
R 1
C 1
P DR = P DR_UP + P DR_LOW + P BOOT + ( I Q ? VCC )
(EQ. 33)
I n
ISL6313 INTERNAL
CIRCUIT
P BOOT = ---------------------
P DR_UP = ? -------------------------------------- + ---------------------------------------- ? ? ---------------------
? R HI1 + R EXT1 R LO1 + R EXT1 ?
P DR_LOW = ? -------------------------------------- + ---------------------------------------- ? ? ---------------------
? R HI2 + R EXT2 R LO2 + R EXT2 ?
P Qg_Q1
3
? R HI1 R LO1 ? P Qg_Q1
? R HI2 R LO2 ? P Qg_Q2
3
2
SENSE
I SEN
+
-
V C (s)
R ISEN
ISEN-
ISEN+
RSET
R SET
VCC
R EXT1 = R G1 + -------------
N
R EXT2 = R G2 + -------------
N
R GI1
Q1
26
R GI2
Q2
FIGURE 20. DCR SENSING CONFIGURATION
Use Equation 35 to calculate the value of R SET . In
this equation, DCR is the DCR of the output inductor at room
temperature, I OCP is the desired overcurrent trip level, and
N is the number of phases. It is recommended that the
FN6448.2
September 2, 2008
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| ISL6313IRZ | 功能描述:IC CTRLR PWM 2PHASE BUCK 36-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 |
| ISL6313IRZ-T | 功能描述:IC CTRLR PWM 2PHASE BUCK 36-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 |
| ISL6314CRZ | 功能描述:电压模式 PWM 控制器 1-PH PWM CNTRLR W/1 INTEGRTD DRVRS 32LD RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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| ISL6314CRZ-TR5453 | 制造商:Intersil Corporation 功能描述:STD. ISL6314CRZ-T W/GOLD BOND WIRE ONLY T&R - Tape and Reel |
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