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| 型号： | IP1203PBF |
| 厂商： | International Rectifier |
| 文件页数： | 11/23页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 15A 24LGA |
| 标准包装： | 10 |
| 系列： | iPOWIR™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 8 V |
| 输入电压： | 5.5 V ~ 13.2 V |
| 频率 - 开关： | 200kHz ~ 400kHz |
| 电流 - 输出： | 15A |
| 同步整流器： | 是 |
| 工作温度： | -10°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-LGA |
| 包装： | 托盘 |
| 供应商设备封装： | LGA（9x9） |
| 配用： | IRDCIP1203-A-ND - IP1203 REFERENCE DESIGN KIT |
iP1203PbF
Overcurrent Protection HICCUP
The overcurrent protection function of the iP1203PbF
offers a hiccup feature. During overloads, when the
overcurrent trip threshold is reached, the power sup-
ply output shuts down and attempts to restart (out-
put HICCUP mode). The time duration between the
shutdown of the output and the restart is determined
by the time it takes to discharge the soft start ca-
pacitor. Typically, the discharge time of the soft start
capacitor is 10 times the charge time. The duty cycle
of the hiccup process is typically 5%. The output will
stay in hiccup indefinitely until the overload is re-
moved. The typical overcurrent trip threshold of the
device is internally set at 30A. The overcurrent shut-
down / HICCUP threshold is about ± 30% accurate.
The iP1203PbF overcurrent shutdown and HICCUP
threshold can be set externally by adding R OCSET re-
sistor from OCSET pin. Refer to Fig.8 for R OCSET se-
lection.
Overvoltage Protection (OVP)
Overvoltage is sensed through output voltage sense
pin FB s . The OVP threshold is set to 115% of the
output voltage. Upon overvoltage condition, the OVP
forces a latched shutdown. In this mode, the upper
FET turns off and the lower FET turns on, thus
crowbaring the output. Reset is performed by recy-
cling the input voltage. Overvoltage can be sensed
by either connecting FB s to its corresponding output
through a separate output voltage divider resistor
network, or it can be connected directly to its corre-
sponding feedback pin FB. For Type III control loop
compensation, FB s should be connected through
voltage dividers only.
Refer to the iP1203PbF Design Procedure section
on how to set the OVP trip threshold.
www.irf.com
PGOOD
This is an output voltage status signal that is open
collector and is pulled low when the output voltage
falls below 85% of the output voltage. High state in-
dicates that outputs are in regulation. The PGOOD
pin can be left floating if not used.
Thermal Shutdown
The iP1203PbF provides thermal shutdown. The
threshold typically is set to 140°C. When the trip
threshold is exceeded, thermal shutdown turns the
output off. Thermal shutdown is not latched and au-
tomatic restart is initiated when the sensed tempera-
ture drops to the normal range.
11
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