参数资料
型号: IR3093MTRPBF
厂商: International Rectifier
文件页数: 21/39页
文件大小: 0K
描述: IC CTLR 3PHASE VR10 48-MLQP
标准包装: 3,000
应用: VID 电压编程器
电源电压: 7.4 V ~ 21 V
电流 - 电源: 38mA
工作温度: 0°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 48-MLPQ
供应商设备封装: 48-MLPQ(7x7)
包装: 带卷 (TR)
IR3093PbF
VCC
(12V)
5VUVL
4.36V
3.75V
7.4V
UVLO
SS/DEL
1.1V
VOUT
PWRGD
OCP THRESHOLD
IOUT
START-UP
(5VUVL GATES
FAULT MODE)
NORMAL OPERATION
(VOUT CHANGES DUE TO
LOAD AND VID CHANGES)
OCP
DELAY
HICCUP OVER-CURRENT
PROTECTION
RE-START
AFTER OCP
CLEARS
POWER-DOWN
(VCC GATES
FAULT MODE)
Figure 8 – Operating Waveforms
Soft-start delay time t SSDEL is the time SS/DEL charged up to 1.1V. After that the error amplifier output is released
to allow the soft start. The soft start time t SS represents the time during which converter output voltage rises from
zero to V O. t SS can be programmed by C SS using equation (4).
C SS
I CHG * t SS
V O
60 * 10 6 * t SS
V O
(4)
C SS * ' V C SS * 1 . 1
t SSDEL (5)
Once C SS is chosen, the soft start delay time t SSDEL, the over-current fault latch delay time t OCDEL , and the delay
time t VccPG from output voltage (V O ) in regulation to Power Good are fixed and shown in equation (5), (6) and (7)
respectively.
I CHG 60 * 10 6
t OCDEL
t VccPG
C SS * ' V
I DISCHG
C SS * ' V
I CHG
C SS * 0. 25
61 * 10 6
C SS * ( 3. 75   V O   1 . 1)
60 * 10 6
(6)
(7)
Over Current Protection (OCP)
The current limit threshold is set by a resistor connected between the OCSET and VDAC pins. If the average
Current Sense Amplifier output plus VDAC voltage exceeds the OCSET voltage, the over-current protection is
triggered.
Page 21 of 39
09/08/05
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