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参数资料
| 型号： | IR3080MTR |
| 厂商： | International Rectifier |
| 文件页数： | 20/41页 |
| 文件大小： | 0K |
| 描述： | IC PHASE CONTROLLER 32L MLPQ |
| 标准包装： | 3,000 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 电流 - 电源： | 11mA |
| 电源电压： | 9.5 V ~ 14 V |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-MLPQ（5x5） |
| 包装： | 带卷 (TR) |
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IR3080
DESIGN PROCEDURES - IR3080 AND IR3086 CHIPSET
IR3080 EXTERNAL COMPONENTS
Oscillator Resistor Rosc
The oscillator of IR3080 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.
VID Delay Capacitor C VIDDEL
After the VID voltage of the integrated linear regulator is above 1.1V, there is a time delay before the soft start of the
converter is initiated. The VID delay time t VID can be programmed by an external capacitor between VIDDEL pin
and LGND, and the capacitance is determined by (1).
C VIDDEL =
66 * 10 ? 6 ? t VID
3 . 91
(1)
Soft Start Capacitor C SS/DEL and Resistor R 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 11. After the
VIDDEL pin voltage rises above 3.91V, 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 (2).
C SS / DEL =
I CHG * t SS
V O
=
70 * 10 ? 6 * t SS
V O
(2)
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 (3), (4)
and (5) respectively.
t SSDEL =
C SS / DEL * 1 . 3
I CHG
=
C SS / DEL * 1 . 3
70 * 10 ? 6
(3)
t OCDEL =
C SS / DEL * 0 . 09
I DISCHG
=
C SS / DEL * 0 . 09
6 * 10 ? 6
(4)
t VccPG =
C SS / DEL * ( 3 . 91 ? V O ? 1 . 3 )
I CHG
=
C SS / DEL * ( 3 . 91 ? V O ? 1 . 3 )
70 * 10 ? 6
(5)
If faster over-current protection is required, a resistor in series with the soft start capacitor C SS/DEL can be used to
reduce the over-current fault latch delay time t OCDEL , and the resistor R SS/DEL is determined by Equation (6).
Equation (2) for soft start capacitor C SS/DEL and Equation (5) for power good delay time t VccPG are unchanged,
while the equation for soft start delay time t SS/DEL (Equation 3) is changed to Equation (7). Considering the worst
case values of charge and discharge current, R SS/DEL should not be greater than 10 k ? .
t * I DISCHG
t ? 6 * 10 ? 6
R SS / DEL =
0 . 09 ? OCDEL
C SS / DEL
I DISCHG
?
0 . 09 ? OCDEL
C SS / DEL
6 * 10 ? 6
(6)
Page 20 of 41
9 /30/04
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相关代理商/技术参数 |
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|---|---|
| IR3080MTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE VRD10 CTRL IC CTRL IC 200 to 700mV 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 |
| IR3080PBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM VRD10 CONTROL IC WITH VCCVID & OVERTEMP DETECT |
| IR3081 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE VR 10.0 CONTROL IC |
| IR3081A | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM VR 10 CONTROL IC |
| IR3081AM | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM VR 10 CONTROL IC |
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