參數(shù)資料
型號(hào)： IRU3047
廠(chǎng)商： International Rectifier
元件分類(lèi)： 基準(zhǔn)電壓源/電流源
英文描述： DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND LDO CONTROLLER
中文描述： 雙同步PWM控制器，帶有均流電路和LDO控制器
文件頁(yè)數(shù)： 3/19頁(yè)
文件大?。?/td> 141K
代理商： IRU3047
IRU3047
3
Rev. 1.0
09/09/02
www.irf.com
PIN# PIN SYMBOL
1
2
PIN DESCRIPTION
Reference Voltage.
Non-inverting input to the second error amplifier, in the current sharing mode it is con-
nected to the programming resistor. In independent two channel mode it is connected to
the reference voltage (Pin1) when Fb2 is connected to the resistor divider to set the
output voltage.
Inverting inputs to the error amplifiers, in current sharing mode Fb1 is connected to a
resistor divider to set the output voltage and Fb2 is connected to programming resistor to
achieve current sharing. In independent two channel mode, these pins work as feedback
inputs for each channel.
Supply voltage for the internal blocks of the IC.
Compensation pins for the error amplifiers.
Supply voltage for the high side output drivers. These are connected to voltages that
must be at least 4V higher than their bus voltages (assuming 5V threshold MOSFET). A
minimum of 1
μ
F high frequency capacitor must be connected from these pins to PGnd
pin to provide peak drive current capability.
Output driver for high side power MOSFET. Connect a diode, such as BAT54 or 1N4148,
from these pins to ground for the application when the inductor current goes negative
(Source/Sink), soft-start at no load and for fast load transient from full load to no load.
3,18
4
5,6
7,14
8,13
V
REF
Vp2
Fb2, Fb1
Vcc
Comp1, Comp2
VcH2, VcH1
HDrv2, HDrv1
PARAMETER
Soft-Start Section
Charge Current
Power Good Section
Fb1 Lower Trip Point
Fb1 Upper Trip Point
Fb2 Lower Trip Point
Fb2 Upper Trip Point
Fb3 Lower Trip Point
Fb3 Upper Trip Point
Power Good Voltage OK
Error Amp Section
Fb Voltage Input Bias Current
Fb Voltage Input Bias Current
Transconductance 1
Transconductance 2
Input Offset Voltage for PWM2
Oscillator Section
Frequency
Ramp Amplitude
Output Drivers Section
Rise Time
Fall Time
Dead Band Time
Max Duty Cycle
Min Duty Cycle
LDO Controller Section
Drive Current
Fb Voltage
Input Bias Current
SYM TEST CONDITION MIN TYP MAX UNITS
SS=0V
Fb1 Ramping Down
Fb1 Ramping Up
Fb2 Ramping Down
Fb2 Ramping Up
Fb3 Ramping Down
Fb3 Ramping Up
5K resistor pulled up to 5V
SS=3V
SS=0V
Fb2 to V
P2
Rt=Open
C
L
=1500pF
C
L
=1500pF
Fb=1V, Freq=200KHz
Fb=1.5V
15
4.5
-2
180
50
85
0
30
1.225
25
0.9
V
REF
1.1
V
REF
0.9
V
REF
1.1
V
REF
0.9
V
REF
1.1
V
REF
4.8
-0.1
-64
400
600
0
200
1.25
35
50
150
90
0
45
1.25
0.5
30
5
+2
220
100
100
250
1.275
2
μ
A
V
V
V
V
V
V
V
μ
A
μ
A
μ
mho
μ
mho
mV
KHz
V
ns
ns
ns
%
%
mA
V
μ
A
SS
IB
PG
FB1L
PG
FB1H
PG
FB2L
PG
FB2H
PG
FB3L
PG
FB3H
V
PG
I
FB1
I
FB2
g
m1
g
m2
V
OS(ERR)2
Freq
V
RAMP
Tr
Tf
T
DB
T
ON
T
OFF
I
LDO
V
FB
LDO
I
LDO(BIAS)
PIN DESCRIPTIONS
相關(guān)PDF資料
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