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参数资料
| 型号： | IR3088AMTR |
| 厂商： | International Rectifier |
| 文件页数： | 14/33页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE W/FAULT DET 20L-MLPQ |
| 标准包装： | 1 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 电流 - 电源： | 10mA |
| 电源电压： | 8.4 V ~ 14 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) |
| 其它名称： | *IR3088AMTR IR3088AMCT |
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IR3088A
DESIGN PROCEDURES - IR3081A AND IR3088A CHIPSET
IR3081A EXTERNAL COMPONENTS
Oscillator Resistor Rosc
The oscillator of IR3081A generates a triangle waveform to synchronize the phase ICs, and the switching frequency
of the each phase converter equals the oscillator frequency, which is set by the external resistor R OSC according to
the curve in Figure 13 of IR3081A Data Sheet.
Soft Start Capacitor C SS/DEL
Because the capacitor C SS/DEL programs four different time parameters, i.e. soft start delay time, soft start time,
over-current latch delay time, and power good delay time, they should be considered together while choosing
C SS/DEL .
The SS/DEL pin voltage controls the slew rate of the converter output voltage, as shown in Figure 10 of IR3081A
data sheet. After the ENABLE pin voltage rises above 0.6V, there is a soft-start delay time t SSDEL, after which the
error amplifier output is released to allow the soft start. The soft start time t SS represents the time during which
converter voltage rises from zero to V O. t SS can be programmed by an external capacitor, which is determined by
Equation (1).
C SS / DEL =
I CHG * t SS
V O
=
70 * 10 ? 6 * t SS
V O
(1)
Once C SS/DEL is chosen, the soft start delay time t SSDEL, the over-current fault latch delay time t OCDEL , and the
delay time t VccPG from output voltage (V O ) in regulation to Power Good are fixed and shown in Equations (2), (3)
and (4) respectively.
t SSDEL =
C SS / DEL * 1 . 3
I CHG
=
C SS / DEL * 1 . 3
70 * 10 ? 6
(2)
t OCDEL =
C SS / DEL * 0 . 115
I OCDISCHG
=
C SS / DEL * 0 . 115
40 * 10 ? 6
(3)
t VccPG =
C SS / DEL * ( 3 . 8 ? 0 . 065 ? V O ? 1 . 3 )
I CHG
=
C SS / DEL * ( 3 . 735 ? V O ? 1 . 3 )
70 * 10 ? 6
(4)
VDAC Slew Rate Programming Capacitor C VDAC and Resistor R VDAC
The slew rate of VDAC down-slope SR DOWN can be programmed by the external capacitor C VDAC as defined in
Equation(5), where I SINK is the sink current of VDAC pin as shown in Figure 15 of IR3081A Data Sheet. The resistor
R VDAC is used to compensate VDAC circuit and is determined by Equation (6). The slew rate of VDAC up-slope
SR UP is proportional to that of VDAC down-slope and is given by Equation (7), where I SOURCE is the source current
of VDAC pin as shown in Figure15 of IR3081A Data Sheet.
C VDAC =
I SINK
SR DOWN
(5)
R VDAC = 0 . 5 +
3 . 2 ? 10 ? 15
C VDAC 2
(6)
Page 14 of 33
SR UP =
I SOURCE
C VDAC
(7)
1/15 /05
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| IR3088AMTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE IC W/ FAULT OVERTEMP DETECT RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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| IR3088M | 功能描述:IC XPHASE W/FAULT DET 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 |
| IR3088MPBF | 功能描述:IC CONTROLLER PHASE 20L-MLPQ 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 |
| IR3088MTR | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE PHASE IC WITH FAULT AND OVERTEMP DETECT |
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