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| 型号： | IR3623MPBF |
| 厂商： | International Rectifier |
| 英文描述： | HIGH FREQUENCY 2-PHASE, SINGLE OR DUAL OUTPUT SYNCHRONOUS STEP DOWN CONTROLLER WITH OUTPUT TRACKING AND SEQUENCING |
| 中文描述： | 高频2相，单或双输出同步降压控制器，输出跟踪和排序 |
| 文件页数： | 10/26页 |
| 文件大小： | 523K |
| 代理商： | IR3623MPBF |
IR3623MPbF
www.irf.com
10
Internal Regulator
IR3623 features an on-board regulator capable of
sourcing current up to 200mA. This integrated
regulator can be used to generate the necessary
bias voltage for the IP2003A, an example of how
this can be used to power IP2003A is shown in
figure 22.
The output of regulator is protected for short
circuit and thermal shutdown.
Out-of-Phase Operation
The IR3623 drives its two output stages 180
o
out-
of-phase. In current share mode single output,
the two inductor ripple currents cancel each other
and result in a reduction of the output current
ripple and yield a smaller output capacitor for the
same ripple voltage requirement. Figure 4 shows
two channels inductor current and the resulting
voltage ripple at output.
IL1
IL2
HDRV1
HDRV2
0
DT
T
Ic
Io
Mode Selection
The IR3623 can operate as a dual output
independently regulated buck converter, or as a
2 phase single output buck converter (current
share mode). The SS2 pin is used for mode
selection. In current share mode this pin should
be floating and in dual output mode a soft start
capacitor must be connected from this pin to
ground to program the start time for the second
output.
Independent Mode
In this mode the IR3623 provides control to two
independent output power supplies with either
common or different input voltages. The output
voltage of each individual channel is set and
controlled by the output of the error amplifier,
which is the amplified error signal from the
sensed output voltage and the reference voltage.
The error amplifier output voltage is compared to
the ramp signal thus generating fixed frequency
pulses of variable duty-cycle, (PWM) which are
applied to the external MOSEFT drivers. Figure
23 shows a typical schematic for such
application.
Fig. 4: Current ripple cancellation for output
In addition, the 180
o
out of phase contributes to
input current cancellation. This result in much
smaller input capacitor’s RMS current and
reduces the input capacitor quantity. Figure 5
shows the equivalent RMS current.
Single Phase
2 Phase
Duty Cycle (Vo/Vin)
R
R
/
o
)
Fig. 5: Input RMS value vs. Duty Cycle
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3623MPBF_1 | 制造商:IRF 制造商全称:International Rectifier 功能描述:HIGH FREQUENCY 2-PHASE, SINGLE OR DUAL OUTPUT SYNCHRONOUS STEP DOWN CONTROLLER WITH OUTPUT TRACKING AND SEQUENCING |
| IR3623MTRPBF | 功能描述:开关变换器、稳压器与控制器 HI FREQ 2-PHASE Single or Dual SYNCH 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 |
| IR3624MPBF | 功能描述:IC REG CTRLR BUCK PWM VM 10-MLPD 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) |
| IR3624MTRPBF | 功能描述:开关变换器、稳压器与控制器 HI FREQ SYNC PWM 600kHz 5 or 12V 0.6 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 |
| IR3628MPBF | 功能描述:IC CTLR PWM BUCK SYNC 12-MLPD RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
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