- 您现在的位置：买卖IC网 > Datasheet目录332 > IRPLLED1A (International Rectifier)IC MOSFET DRIVER Datasheet资料下载
参数资料
| 型号： | IRPLLED1A |
| 厂商： | International Rectifier |
| 文件页数： | 12/20页 |
| 文件大小： | 0K |
| 描述： | IC MOSFET DRIVER |
| 标准包装： | 1 |
| 系列： | * |
IRS254(0,1)(S)PbF
Application Information and Additional
Details
Operating Mode
determined as follows. When the inductance value
is large enough to maintain a low ripple on I FB , I out,avg
can be calculated:
The IRS254(01,11) operates as a time-delayed
hysteritic buck controller. During normal operating
conditions the output current is regulated via the IFB
pin voltage (nominal value of 500 mV). This feedback
is compared to an internal high precision bandgap
voltage reference. An on-board dV/dt filter has also
been used to ignore erroneous transitioning.
Once the supply to the IC reaches V CCUV+ , the LO
output is held high and the HO output low for a
Iout ( avg ) = VIFBTH
RCS
predetermined period of time. This initiates charging of
the bootstrap capacitor, establishing the V BS floating
supply for the high-side output. The IC then begins
toggling HO and LO outputs as needed to regulate the
current.
(A)
F ig.2 (A) Storing Energy in Inductor
(B) Releasing Inductor Stored Energy
(B)
Iout
HO
50%
t_HO_off
50%
DT1
50%
t_HO_on
DT2
HO
LO
LO
IFB
IFBTH
t_LO_on
50%
t_LO_off
50%
Fig.1 IRS254(01,11) Control Signals, Iavg=1.2 A
As long as V IFB is below V IFBTH , HO is on, modulated by
the watchdog timer described below, which maintains
charge for the floating high side on the bootstrap
capacitor. The load is receiving current from V BUS ,
which simultaneously stores energy in the inductor, as
V IFB increases, unless the load is open circuit. Once
V IFB crosses V IFBTH , the control loop switches HO off
after the delay t HO,OFF . When HO switches off, LO will
turn on after the deadtime (DT), the inductor then
releases its stored energy into the load and V IFB starts
decreasing. When V IFB drops below V IFBTH again, the
control loop switches HO on after the delay t HO,ON and
LO off after the delay t HO,ON + DT. The switching
continues to regulate the current at an average value
www.irf.com
12
Fig.3 IRS254(0,1) Time Delayed Hysterisis
The control method is hysteretic with a free running
frequency, which enables average current regulation
in constrast to a fixed frequency scheme providing
peak current regulation only. This reduces the part
count since there is no need for frequency setting
components and also provides an inherently stable
system, which acts as a dynamic current source.
A deadtime of approximately 140 ns between the two
gate drive signals is incoporated to prevent shoot-
through. The deadtime has been adjusted to maintain
precise current regulation, while still preventing
shoot-through.
? 2010 International Rectifier
相关PDF资料 |
PDF描述 |
|---|---|
| IRPLLED7 | IC MOSFET DRIVER |
| IRPP3637-06A | BOARD REF DESIGN POWIR+ |
| IRS2001MPBF | IC DRIVER HIGH/LOW SIDE 16MLPQ |
| IRS2001SPBF | IC DRIVER HI/LO SIDE 200V 8-SOIC |
| IRS2003STRPBF | IC DRIVER HALF-BRIDGE 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IRPLLED5 | 制造商:International Rectifier 功能描述: |
| IRPLLED7 | 功能描述:IC MOSFET DRIVER RoHS:否 类别:集成电路 (IC) >> PMIC - MOSFET，电桥驱动器 - 外部开关 系列:* 标准包装:95 系列:- 配置:半桥 输入类型:PWM 延迟时间:25ns 电流 - 峰:1.6A 配置数:1 输出数:2 高端电压 - 最大（自引导启动）:118V 电源电压:9 V ~ 14 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:管件 产品目录页面:1282 (CN2011-ZH PDF) 其它名称:*LM5104M*LM5104M/NOPBLM5104M |
| IRPLLNR1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| IRPLLNR2E | 功能描述:KIT BALLAST LINEAR INT 230VAC RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 类型:MCU 适用于相关产品:Freescale MC68HC908LJ/LK（80-QFP ZIF 插口） 所含物品:面板、缆线、软件、数据表和用户手册 其它名称:520-1035 |
| IRPLLNR2U | 功能描述:BALLAST 32W/T8 120V AC IR21571 RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 类型:MCU 适用于相关产品:Freescale MC68HC908LJ/LK（80-QFP ZIF 插口） 所含物品:面板、缆线、软件、数据表和用户手册 其它名称:520-1035 |
发布紧急采购，3分钟左右您将得到回复。