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参数资料
| 型号： | IRDC3841 |
| 厂商： | International Rectifier |
| 文件页数： | 14/32页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL SYNC BUCK CONVERTER |
| 产品变化通告： | (EP) Parts Discontinuation 25/May/2012 |
| 标准包装： | 1 |
| 系列： | SupIRBuck™ |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 1.8V |
| 电流 - 输出： | 8A |
| 输入电压： | 12V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 600kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | IR3841 |
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IR3841MPbF
Thermal Shutdown
Temperature sensing is provided inside IR3841.
The trip threshold is typically set to 140 o C. When
1.5V <Vin<16V
4.5V <Vcc<5.5V
trip threshold is exceeded, thermal shutdown
turns off both MOSFETs and discharges the soft
start capacitor.
Automatic restart is initiated when the sensed
temperature drops within the operating range.
PGood
Vcc
PGood
Seq
Rt
Enable
Vin
Boot
SW
OCSet
Fb
RA
RB
Vo(master)
There is a 20 o C hysteresis in the thermal
shutdown threshold.
SS/ SD
Gnd
PGnd
Comp
Output Voltage Sequencing
The IR3841 can accommodate user
programmable sequencing options using Seq,
1.5V <Vin<16V
4.5V <Vcc<5.5V
Enable and Power Good pins.
Enable
Vin
Boot
Vo(master)
Vcc
SW
Vo(slave)
PGood
Vo1
RE
PGood
OCSet
RC
Seq
Fb
Vo2
RF
Rt
RD
SS/ SD
Gnd
PGnd
Comp
Simultaneous Powerup
Fig. 8b. Application Circuit for Simultaneous
Fig. 8a. Simultaneous Power-up of the slave
Sequencing
with respect to the master.
Power Good Output
Through these pins, voltage sequencing such as
simultaneous and sequential can be
implemented. Figure 8. shows simultaneous
sequencing configurations. In simultaneous
power-up, the voltage at the Seq pin of the slave
reaches 0.7V before the Fb pin of the master. For
R E /R F =R C /R D , therefore, the output voltage of
the slave follows that of the master until the
voltage at the Seq pin of the slave reaches 0.7 V.
After the voltage at the Seq pin of the slave
exceeds 0.85V, the internal 0.7V reference of
the slave dictates its output voltage.
06/18/09
The IC continually monitors the output voltage via
Feedback (Fb pin). The feedback voltage is
compared to a fixed voltage. As soon as the Fb
voltage reaches 0.88* V ref , the Power Good signal
flags. This pin is open drain and it needs to be
externally pulled high. High state indicates that
output is in regulation. Fig 9. shows the timing
diagram for the PGood function.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IRDC3841W | 功能描述:电源管理IC开发工具 User Guide IR3841W Eval Brd RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| IRDC3842 | 功能描述:电源管理IC开发工具 IR3842 SYNC CONV 600kHz EVAL BRD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| IRDC3842A | 功能描述:电源管理IC开发工具 IR3842A SYNC CONV 300kHz EVAL BRD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| IRDC3842W | 功能描述:电源管理IC开发工具 User Guide IR3842W Eval Brd RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| IRDC3843 | 制造商:International Rectifier 功能描述:BOARD EVALUATION IR3843 |
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