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参数资料
| 型号： | IR3093MTR |
| 厂商： | International Rectifier |
| 英文描述： | 3 PHASE OPTERON, ATHLON, OR VR10.X CONTROL IC |
| 中文描述： | 3相皓龙，速龙，或控制IC的VR10.X |
| 文件页数： | 20/39页 |
| 文件大小： | 693K |
| 代理商： | IR3093MTR |
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IR3093
Page 20 of 39
07/15/04
2
15
10
2
5
DAC
DAC
C
R
(2)
DAC
SOURCE
C
UP
I
SR
(3)
The oscillator frequency is programmable from 100kHz to 540kHz with an external resistor R
ROSC
as shown in
Figure 6 oscillator generates an internal 50% duty cycle sawtooth signal (Figure 3.) that is used t
o generate 120°
out-of-phase timing pulses to set Phase 1,2 and 3 RS flip-flops. Once the switching frequency is chosen, R
ROSC
can
be determined from the curve in the Typical Operating Characteristics Section.
Soft Start, Over-Current Fault Delay, and Hiccup Mode
The IR3093 has a programmable soft-start function to limit the surge current during converter power-up. A capacitor
connected between the SS/DEL and LGND pins controls soft start timing as well as over-current protection delay
and hiccup mode timing.
Figure 8 depicts the various operating modes of the SS/DEL function. Under a no fault condition, the SS/DEL
capacitor will charge. The SS/DEL charge soft-start duration is controlled by a 60uA charge current which charges
CSS up to 4.0V. The Error Amplifier output is clamped low until SS/DEL reaches 1.1V. The Error Amplifier will then
regulate the converter’s output voltage to match the SS/DEL voltage less the 1.1V offset until it reaches the level
determined by the VID inputs. The PWRGD signal is asserted once the SS/DEL voltage exceeds 3.75V.
Five different faults will immediately cause SS/DEL to begin discharging and set the Fault Latch once SS/DEL is
below 3.75V;
1. VCC Under Voltage Lock Out
2. 5VUVL Under Voltage Lock Out
3. VID=11111x fault
4. Low Enable pin
5. Over Current Condition.
A delay is included if any fault condition occurs after a successful soft start sequence. This is required since
momentary faults can occur as part of normal operation due to load transients such as exciting an over-current
condition or a VID=11111x code while going through VID transitions. If any fault occurs during normal operation, the
SS/DEL capacitor will discharge through a 55uA current sink but will not set the fault latch immediately. If the fault
condition persists long enough for the SS/DEL capacitor to discharge below the 3.75V threshold of the delay
comparator, the Fault latch will be set pulling the Error Amplifier’s output low, inhibiting switching and de-asserting
the PWRGD signal. The SS/DEL capacitor is then discharged through a 6uA discharge current resulting in a long
hiccup duration.
The SS/DEL capacitor will continue to discharge until it reaches 0.265V where the fault latch is reset allowing a
normal soft start to occur. If a fault condition is again encountered during the soft start cycle, the fault latch will be
set without any delay and hiccup mode will begin. During hiccup mode the 10 to 1 charge to discharge ratio results
in a 9.1% hiccup mode duty cycle regardless of at what point a fault condition occurs.
The converter can be disabled if the SS/DEL pin is pulled below 0.9V.
Oscillator Resistor R
ROSC
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3093MTRPBF | 功能描述:IC CTLR 3PHASE VR10 48-MLQP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°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) |
| IR3094MPBF | 功能描述:IC REG CTRLR BUCK PWM VM 48MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| IR3094MTRPBF | 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 |
| IR3094PBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:3 PHASE PWM CONTROLLER FOR POINT OF LOAD |
| IR30BQ060TR | 制造商:International Rectifier 功能描述: |
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