参数资料
| 型号： | ISL62883IRTZ |
| 厂商： | Intersil |
| 文件页数： | 11/37页 |
| 文件大小： | 0K |
| 描述： | IC REG PWM 3PHASE BUCK 40TQFN |
| 标准包装： | 60 |
| 应用： | 控制器，Intel IMVP-6.5? |
| 输入电压： | 5 V ~ 21 V |
| 输出数： | 1 |
| 输出电压： | 0.013 V ~ 1.5 V |
| 工作温度： | -40°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（5x5） |
| 包装： | 管件 |
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页当前第11页第12页第13页第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页第30页第31页第32页第33页第34页第35页第36页第37页
ISL62883, ISL62883B
Theory of Operation
Multiphase R 3 ? Modulator
VW
VW
MASTER CLOCK CIRCUIT
MASTER
COMP
MASTER
CLOCK
COMP
Vcrm
CLOCK
Phase
Sequencer
Clock1
Clock2
Clock3
Vcrm
gmVo
Crm
Master
VW
Vcrs1
SLAVE CIRCUIT 1
Clock1 S PWM1 Phase1
Q
R
gm
L1
I L1
Vo
Co
Clock
Clock1
PWM1
Clock2
PWM2
Crs1
Clock3
VW
SLAVE CIRCUIT 2
Clock2 S PWM2 Phase2
Q
R
L2
I L2
PWM3
VW
Crs2
Vcrs2
gm
Crs3
VW
Vcrs3
SLAVE CIRCUIT 3
Clock3 S PWM3 Phase3
Q
R
gm
L3
I L3
Vcrs1
Vcrs3
Vcrs2
FIGURE 5. R 3 ? MODULATOROPERATION PRINCIPLES IN LOAD
INSERTION RESPONSE
The ISL62883 is a multiphase regulator, which implements Intel?
IMVP-6.5? protocol. It can be programmed for 1-, 2- or 3-phase
VW
FIGURE 3. R 3 ? MODULATORCIRCUIT
operation for microprocessor core applications. It uses Intersil
patented R 3 ? (Robust Ripple Regulator?) modulator. The R 3 ?
modulator combines the best features of fixed frequency PWM
and hysteretic PWM while eliminating many of their shortcomings.
Figure 3 conceptually shows the ISL62883 multiphase R 3 ?
Vcrm
COMP
Master
Clock
Clock1
PW M1
Clock2
PW M2
Clock3
PW M3
VW
Hysteretic
W indow
modulator circuit, and Figure 4 shows the operation principles.
A current source flows from the VW pin to the COMP pin, creating
a voltage window set by the resistor between the two pins. This
voltage window is called VW window in the following discussion.
Inside the IC, the modulator uses the master clock circuit to
generate the clocks for the slave circuits. The modulator
discharges the ripple capacitor C rm with a current source equal
to g m V o , where g m is a gain factor. C rm voltage V crm is a
sawtooth waveform traversing between the VW and COMP
voltages. It resets to VW when it hits COMP, and generates a one-
shot master clock signal. A phase sequencer distributes the
master clock signal to the slave circuits. If the ISL62883 is in
3-phase mode, the master clock signal will be distributed to the
three phases, and the Clock1~3 signals will be 120° out-of-
phase. If the ISL62883 is in 2-phase mode, the master clock
signal will be distributed to Phases 1 and 2, and the Clock1 and
Clock2 signals will be 180° out-of-phase. If the ISL62883 is in
1-phase mode, the master clock signal will be distributed to
Phases 1 only and be the Clock1 signal.
Vcrs2 Vcrs3 Vcrs1
FIGURE 4. R 3 ? MODULATOR OPERATION PRINCIPLES IN
STEADY STATE
11
Each slave circuit has its own ripple capacitor C rs , whose voltage
mimics the inductor ripple current. A g m amplifier converts the
inductor voltage into a current source to charge and discharge
C rs . The slave circuit turns on its PWM pulse upon receiving the
clock signal, and the current source charges C rs . When C rs
FN6891.4
June 21, 2011
相关PDF资料 |
PDF描述 |
|---|---|
| ISL6292BCRZ | IC CHARGER LI-ION 4.2V 4X4 16QFN |
| ISL6294IBZ | IC CHRGR LI-ION SGL 8-SOIC |
| ISL6306IRZ | IC REG CTRLR BUCK PWM VM 40-QFN |
| ISL6307AIRZ | IC REG CTRLR BUCK PWM VM 48-QFN |
| ISL6307BIRZ | IC REG CTRLR BUCK PWM VM 48-QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL62883IRTZ-T | 功能描述:直流/直流开关调节器 3 PHS PWM BUCKG FOR MICROPROC PWR SUP RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| ISL62884C | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Single-Phase PWM Regulator for IMVP-6a?￠ Mobile CPUs |
| ISL62884CEVAL2Z | 功能描述:EVAL BOARD FOR ISL62884C RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL62884CHRTZ | 功能描述:直流/直流开关调节器 1-PHS PWM BUCKG FOR MICROPROC PWR SUPPLY RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| ISL62884CHRTZ-T | 功能描述:直流/直流开关调节器 1-PHS PWM BUCKG FOR MICROPROC PWR SUPPLY RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
发布紧急采购，3分钟左右您将得到回复。