参数资料
| 型号： | ISL6563CR-T |
| 厂商： | Intersil |
| 文件页数： | 7/19页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM MULTIPHASE 24-QFN |
| 标准包装： | 6,000 |
| 应用： | 控制器，Intel VRM9，VRM10，AMD Hammer 应用 |
| 输入电压： | 5 V ~ 12 V |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 1.85 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-VFQFN 裸露焊盘 |
| 供应商设备封装： | 24-QFN（4x4） |
| 包装： | 带卷 (TR) |
ISL6563
For more information, refer to the ‘Output Voltage Offset
Programming’ paragraph.
SSEND (Pin 10)
This pin is an end of Soft-Start (SS) indicator; open drain
output device stays ON during soft-start, and goes open when
soft-start ends.
Operation
Figure 1 shows a simplified diagram of the voltage regulation
and current control loops. Both voltage and current feedback
are used to precisely regulate the output voltage and tightly
control the output currents, I L1 and I L2 , of the two power
channels.
Voltage Loop
Feedback from the output voltage is applied via resistor R1
to the inverting input of the Error Amplifier. This signal can
drive the Error Amplifier output either high or low, depending
upon the output voltage. Low output voltage makes the
amplifier output move towards a higher output voltage level.
Amplifier output voltage is applied to the positive inputs of
the PWM Circuit comparators via the correction summing
networks. Out-of-phase sawtooth signals are applied to the
two PWM comparators inverting inputs. Increasing Error
Amplifier voltage results in increased Comparator output
duty cycle. This increased duty cycle signal is passed
through the output drivers with no phase reversal to drive the
external upper MOSFETs. Increased duty cycle or ON time
for the upper MOSFET transistors results in increased
output voltage to compensate for the low output voltage
sensed.
Current Loop
The current control loop works in a similar fashion to the
voltage control loop, but with current control information
applied individually to each channel’s Comparator. The
information used for this control is the voltage that is
developed across the r DS(ON) of each lower MOSFET, while
they are conducting. A single resistor converts and scales
the voltage across the MOSFETs to a current that is applied
to the Current Sensing circuit within the ISL6563. Output
from these sensing circuits is applied to the current
averaging circuit. Each PWM channel receives the
difference current signal from the summing circuit that
compares the average sensed current to the individual
channel current. When a power channel’s current is greater
than the average current, the signal applied via the summing
Correction circuit to the Comparator, reduces the output
pulse width of the Comparator to compensate for the
detected “above average” current in that channel.
Droop Implementation
In addition to controlling each channel’s output current, the
average channel current is used to implement an output
DAC
&
REFERENCE
OSCILLATOR
V IN
ERROR
AMP
Σ
PWM
CIRCUIT
HALF-BRIDGE
DRIVE
UGATE1
COMP
LGATE1
R2
C2
FB
Σ
Σ
PWM
CIRCUIT
HALF-BRIDGE
DRIVE
CURRENT
SENSE
PHASE1
V IN
L1
L2
V OUT
C OUT
R1
UGATE2
DROOP
SOURCE, I FB
Σ
AVERAGE
CURRENT
SENSE
LGATE2
PHASE2
ISEN
VCC
R ISEN
FIGURE 1. SIMPLIFIED BLOCK DIAGRAM OF THE ISL6563 VOLTAGE AND CURRENT CONTROL LOOPS
7
FN9126.8
June 10, 2010
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PDF描述 |
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| ISL6563CR | IC CTRLR PWM MULTIPHASE 24-QFN |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6563CR-TK | 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述: |
| ISL6563CRZ | 功能描述:电流型 PWM 控制器 P6 TWO PHS CONT INTEGRTD DRVRS DESKT 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 |
| ISL6563CRZ-T | 功能描述:电流型 PWM 控制器 P6 TWO PHS CONT INTEGRTD DRVRS DESKT 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 |
| ISL6563CRZ-TK | 功能描述:IC CTRLR PWM MULTIPHASE 24-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 |
| ISL6563EVAL1 | 制造商:Intersil Corporation 功能描述:DEV TOOLS, EVAL BD - Bulk 制造商:Intersil 功能描述:ISL6563 EVALRD |
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