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参数资料
| 型号： | IR3080MTR |
| 厂商： | International Rectifier |
| 英文描述： | XPHASE VRD10 CONTROL IC WITH VCCVID & OVERTEMP DETECT |
| 中文描述： | XPHASE VRD10控制集成电路VCCVID |
| 文件页数： | 31/41页 |
| 文件大小： | 2267K |
| 代理商： | IR3080MTR |
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IR3080
DESIGN EXAMPLE 2 - EVRD 10 HIGH FREQUENCY ALL-CERAMIC CONVERTER
SPECIFICATIONS
Input Voltage: V
I
=12 V
DAC Voltage: V
DAC
=1.3 V
No Load Output Voltage Offset: V
O_NLOFST
=20 mV
Output Current: I
O
=105 ADC
Maximum Output Current: I
OMAX
=120 ADC
Output Impedance: R
O
=0.91 m
VCC Ready to VCC Power Good Delay: t
VccPG
=0-10mS
VID Delay Time: t
VID
=2.5mS
Soft Start Time: t
SS
=2.9mS
Over Current Delay: t
OCDEL
=2.1mS
Dynamic VID Down-Slope Slew Rate: SR
DOWN
=2.5mV/uS
Over Temperature Threshold: T
PCB
=115 oC
POWER STAGE
Phase Number: n=6
Switching Frequency: f
SW
=800 kHz
Output Inductors: L=100 nH, R
L
=0.5 m
Output Capacitors: Ceramic, C=22uF, R
C
= 2m
, Number Cn=62
IR3080 EXTERNAL COMPONENTS
Oscillator Resistor
Rosc
Once the switching frequency is chosen, R
OSC
can be determined from the curve in Figure 13. For switching
frequency of 800kHz per phase, choose R
OSC
=13.3k
VID Delay Capacitor C
VIDDEL
Given VID delay time t
VID
=2.5mS
,
the capacitor can is,
t
C
VIDDEL
42
91
.
91
.
Soft Start Capacitor
C
SS/DEL
and Resistor
R
SS/DEL
Because
faster over-current protection is required, the soft start capacitor C
SS/DEL
in series with the resistor
R
SS/DEL
is used. Calculate the soft start capacitor from the required soft start time.
t
I
C
O
10
*
20
3
Calculate the soft start resistor from the required over current delay time t
OCDEL
,
=
=
I
DISCHG
10
*
6
The soft start delay time is
I
R
C
t
CHG
10
*
70
nF
VID
10
*
5
10
*
66
*
10
*
66
3
6
6
=
=
=
, choose 47nF
uF
V
SS
CHG
DEL
SS
16
.
10
3
*
9
10
*
70
3
6
/
=
=
=
, choose C
SS/DEL
=0.15uF
=
k
C
I
t
R
DEL
SS
DISCHG
OCDEL
DEL
SS
1
10
*
6
15
.
10
6
*
6
10
*
1
09
.
09
.
6
3
/
/
mS
I
CHG
DEL
SS
DEL
SS
SSDEL
6
)
10
*
70
*
10
6
*
1
3
10
*
15
.
)
3
6
3
6
/
/
=
=
=
Page 31 of 41
9
/30/04
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| IR3080MTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE VRD10 CTRL IC CTRL IC 200 to 700mV 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 |
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| IR3081A | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM VR 10 CONTROL IC |
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