参数资料
| 型号： | ISL62882HRTZ-T |
| 厂商： | Intersil |
| 文件页数： | 17/42页 |
| 文件大小： | 0K |
| 描述： | IC REG PWM 2PHASE BUCK 40TQFN |
| 标准包装： | 6,000 |
| 应用： | 控制器，Intel IMVP-6.5? |
| 输入电压： | 5 V ~ 25 V |
| 输出数： | 1 |
| 输出电压： | 0.013 V ~ 1.5 V |
| 工作温度： | -10°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页第16页当前第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页第38页第39页第40页第41页第42页
ISL62882, ISL62882B
PHASE2
V2p
L2
Rdcr2
V2n Rpcb2
REP RATE = 10kHz
ISEN2
INTERNAL
Cs
Rs
Rs
Rs
I L2
V O
TO IC
ISEN1
Rs
Cs
PHASE1
V1p
L1
Rdcr1
V1n
Rpcb1
I L1
FIGURE 14. DIFFERENTIAL-SENSING CURRENT BALANCING
CIRCUIT
Sometimes, it is difficult to implement symmetrical layout. For
the circuit Figure 13 shows, asymmetric layout causes different
R pcb1 and R pcb2 thus current imbalance. Figure 14 shows a
differential-sensing current balancing circuit recommended for
ISL62882. The current sensing traces should be routed to the
inductor pads so they only pick up the inductor DCR voltage. Each
ISEN pin sees the average voltage of two sources: its own phase
inductor phase-node pad, and the other phase inductor output
REP RATE = 25kHz
side pad. Equations 7 and 8 give the ISEN pin voltages:
V ISEN1 = V 1p + V 2n
V ISEN2 = V 2p + V 1n
The ISL62882 will make V ISEN1 = V ISEN2 . So there are:
V 1p + V 2n = V 2p + V 1n
Rewriting Equation 9 gives:
(EQ. 7)
(EQ. 8)
(EQ. 9)
REP RATE = 50kHz
V 1p – V 1n = V 2p – V 2n
Therefore:
R dcr1 × I L1 = R dcr2 × I L2
(EQ. 10)
(EQ. 11)
REP RATE = 100kHz
Current balancing (I L1 = I L2 ) will be achieved when there is
R dcr1 = R dcr2 . R pcb1 and R pcb2 will not have any effect.
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 15
shows current balancing performance of the ISL62882
REP RATE = 200kHz
evaluation board with load transient of 15A/50A 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 a 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.
FIGURE 15. ISL62882 EVALUATION BOARD CURRENT BALANCING
DURING DYNAMIC OPERATION.
Ch1: IL1, Ch2: I Ioad , Ch3: IL2
17
FN6890.4
June 21, 2011
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL62882IRTZ | 功能描述:直流/直流开关调节器 2 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 |
| ISL62882IRTZ-T | 功能描述:直流/直流开关调节器 2 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 |
| ISL62883 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Multiphase PWM Regulator for IMVP-6.5 Mobile CPUs and GPUs |
| ISL62883BHRTZ | 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 |
| ISL62883BHRTZ-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 |
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