参数资料
| 型号： | ISL62883IRTZ-T |
| 厂商： | Intersil |
| 文件页数： | 16/37页 |
| 文件大小： | 0K |
| 描述： | IC REG PWM 3PHASE BUCK 40TQFN |
| 标准包装： | 6,000 |
| 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： | 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页第14页第15页当前第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
Current balancing (I L1 = I L2 = I L3 ) will be achieved when there is
R dcr1 = R dcr2 = R dcr3 . R pcb1 , R pcb2 and R pcb3 will not have any
effect.
REP RATE = 10kHz
REP RATE = 25kHz
REP RATE = 50kHz
Since the slave ripple capacitor voltages mimic the inductor
currents, R 3 ? modulator can naturally achieve excellent current
balancing during steady state and dynamic operations. Figure 12
shows current balancing performance of the ISL62883
evaluation board with load transient of 12A/51A at different rep
rates. The inductor currents follow the load current dynamic
change with the output capacitors supplying the difference. The
inductor currents can track the load current well at low rep rate,
but cannot keep up when the rep rate gets into the hundred-kHz
range, where it’s out of the control loop bandwidth. The controller
achieves excellent current balancing in all cases.
CCM Switching Frequency
The R fset resistor between the COMP and the VW pins sets the
sets the VW windows size, therefore sets the switching frequency.
When the ISL62883 is in continuous conduction mode (CCM),
the switching frequency is not absolutely constant due to the
nature of the R 3 ? modulator. As explained in the Multiphase
R 3 ? Modulator section, the effective switching frequency will
increase during load insertion and will decrease during load
release to achieve fast response. On the other hand, the
switching frequency is relatively constant at steady state.
Variation is expected when the power stage condition, such as
input voltage, output voltage, load, etc. changes. The variation is
usually less than 15% and doesn’t have any significant effect on
output voltage ripple magnitude. Equation 17 gives an estimate
of the frequency-setting resistor R fset value. 8k Ω R fset gives
approximately 300kHz switching frequency. Lower resistance
gives higher switching frequency.
R fset ( k Ω ) = ( Period ( μ s ) – 0.29 ) × 2.65
(EQ. 17)
REP RATE = 100kHz
Phase Count Configurations
The ISL62883 can be configured for 3-, 2- or 1-phase operation.
For 2-phase configuration, tie the PWM3 pin to 5V. Phase-1 and
Phase-2 PWM pulses are 180° out-of-phase. In this
configuration, the ISEN3/FB2 pin (pin 9) serves the FB2 function.
For 1-phase configuration, tie the PWM3 and ISEN2 pins to 5V. In
this configuration, only Phase-1 is active. The ISEN3/FB2, ISEN2,
and ISEN1 pins are not used because there is no need for either
current balancing or FB2 function.
REP RATE = 200kHz
FIGURE 12. ISL62883 EVALUATION BOARD CURRENT BALANCING
DURING DYNAMIC OPERATION. CH1: IL1, CH2: I LOAD ,
CH3: IL2, CH4: IL3
16
FN6891.4
June 21, 2011
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| ISL62884CIRTZ | 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 |
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