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| 型号： | IR3087MPBF |
| 厂商： | International Rectifier |
| 文件页数： | 18/35页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE W/OVP/TM CTRL 20MLPQ |
| 标准包装： | 5 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 电流 - 电源： | 10mA |
| 电源电压： | 8.4 V ~ 21 V |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-MLPQ |
| 供应商设备封装： | 20-MLPQ（4x4） |
| 包装： | 剪切带 (CT) |
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IR3087PBF
Phase Delay Timing Resistors R PHASE1 and R PHASE2
The phase delay of the interleaved multiphase converter is programmed by the resistor divider connected at
RMPIN+ or RMPIN- depending on which slope of the oscillator ramp is used for the phase delay programming of
phase IC, as shown in Figure 3.
If the upslope is used, RMPIN+ pin of the phase IC should be connected to RMPOUT pin of the control IC and
RMPIN- pin should be connected to the resistor divider. When RMPOUT voltage is above the trip voltage at
RMPIN- pin, the PWM latch is set. GATEL becomes low, and GATEH becomes high after the non-overlap time.
If down slope is used, RMPIN- pin of the phase IC should be connected to RMPOUT pin of the control IC and
RMPIN+ pin should be connected to the resistor divider. When RMPOUT voltage is below the trip voltage at
RMPIN- pin, the PWM latch is set. GATEL becomes low, and GATEH becomes high after the non-overlap time.
Use VBIAS voltage as the reference for the resistor divider since the oscillator ramp magnitude from control IC
tracks VBIAS voltage. Try to avoid both edges of the oscillator ramp for better noise immunity. Determine the ratio
of the programming resistors corresponding to the desired switching frequencies and phase numbers. If the resistor
R PHASEx1 is pre-selected, the resistor R PHASEx2 is determined as:
R PHASEx 2 =
RA PHASEx ? R PHASEx 1
1 ? RA PHASEx
(20)
Combined Over Temperature and Phase Delay Setting Resistors R PHASE1 , R PHASE2 and R PHASE3
The over temperature setting resistor divider can be combined with the phase delay resistor divider to save one
resistor per phase.
Calculate the HOTSET threshold voltage V HOTSET corresponding to the allowed maximum temperature from
Equation (18). If the over temperature setting voltage is lower than the phase delay setting voltage,
VBIAS*RA PHASEx , connect RMPIN+ or RMPIN- pin between R PHASEx1 and R PHASEx2, and connect HOTSET pin
between R PHASEx2 and R PHASEx3. Pre-select R PHASEx1 ,
R PHASEx 2 =
R PHASEx 3 =
( RA PHASEx ? V BIAS ? V HOTSET ) * R PHASEx 1
V BIAS ? ( 1 ? RA PHASEx )
V HOTSET ? R PHASEx 1
V BIAS * ( 1 ? RA PHASEx )
(21)
(22)
If the over temperature setting voltage is higher than the phase delay setting voltage, VBIAS*RA PHASEx , connect
HOTSET pin between R PHASEx1 and R PHASEx2. and connect RMPIN+ or RMPIN- between R PHASEx2 and R PHASEx3 .
Pre-select R PHASEx1 ,
R PHASEx 2 =
R PHASEx 3 =
( V HOTSET ? RA PHASEx ? V BIAS ) ? R PHASEx 1
V BIAS ? V HOTSET
RA PHASEx ? V BIAS * R PHASEx 1
V BIAS ? V HOTSET
(23)
(24)
Bootstrap Capacitor C BST
Depending on the duty cycle and gate drive current of the phase IC, a 0.1uF to 1uF capacitor is needed for the
bootstrap circuit.
Decoupling Capacitors for Phase IC
0.1uF-1uF decoupling capacitors are required at VCC and VCCL pins of phase ICs.
Page 18 of 35
1 /31/05
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相关代理商/技术参数 |
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|---|---|
| IR3087MTR | 功能描述:IC XPHASE W/OVP/TM CTRL 20L-MLPQ RoHS:否 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:XPhase™ 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件 |
| IR3087MTRPBF | 功能描述:IC CONTROLLER PHASE 20MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:XPhase™ 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件 |
| IR3087PBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM PHASE IC WITH OPTI-PHASETM, OVP, AND OVERTEMP DETECT |
| IR3088 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE PHASE IC WITH FAULT AND OVERTEMP DETECT |
| IR3088A | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT |
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