IRU3146CFTR International Rectifier, IRU3146CFTR Datasheet - Page 3

• Manufacturer Part Number: IRU3146CFTR
• Description: IC PWM DUAL SYNC 28-TSSOP
• Manufacturer: International Rectifier

Specifications of IRU3146CFTR

• Pwm Type: Voltage Mode
• Number Of Outputs: 2
• Frequency - Max: 345kHz
• Duty Cycle: 85%
• Voltage - Supply: 4.5 V ~ 16 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-TSSOP
• Frequency-max: 345kHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PARAMETER
Soft-Start Section
Charge Current
Power Good Section
V
V
PGood Output Low Voltage
Error Amp Section
Fb Voltage Input Bias Current
Transconductance 1
Transconductance 2
Error Amp Source/Sink Current
Input Offset Voltage for PWM1/2
VP2 Voltage Range
Oscillator Section
Frequency
Ramp Amplitude
Synch Frequency Range
Synch Pulse Duration
Synch High Level Threshold
Synch Low Level Threshold
V
Output Voltage
Output Current
Protection Section
OVP Trip Threshold
OVP Fault Prop Delay
Current Limit Threshold
Current Source
Hiccup Duty Cycle
Hiccup High Level Threshold
Hiccup Low Level Threshold
Output Drivers Section
Rise Time
Fall Time
Dead Band Time
Max Duty Cycle
Min Duty Cycle
Min Pulse Width
Thermal Shutdown Trip Point
Thermal Shutdown Hysteresis
Note 1: Guaranteed by design but not tested for production.
Rev. 1.1
6/25/04
SENS1
SENS2
OUT3
Internal Regulator
Lower Trip Point
Lower Trip Point
Puls(min)
V
PG
OCSet
SYM
PG
V
OS(ERR)2
OVP
SS
VP2
Freq
D
D
I
g
g
T
RAMP
FB1
T
T
MAX
m1
m2
MIN
DB
FB2H
FB1L
r
f
IB
SS=0V
V
V
I
SS=3V
Fb to V
Note1
Rt
Note1
20% above free running freq
Note1
Note1
Output forced to 1.125V
Hiccup pin pulled high, Note1
Note1
C
C
Figure 2
Fb=0.6V, F
Fb=1V
F
Note 1
SINK
SW
SENS1
SENS2
L
L
(SET)
=1500pF, Figure 2
=1500pF, Figure 2
=300KHz, Note1
www.irf.com
=2mA
TEST CONDITION
Ramping Down
Ramping Down
to 30K
REF
SW
=300KHz
REF,
Note1
0.8
0.8
1.1
150
MIN
1400
1400
255
200
0.8
5.9
20
60
50
16
-5
2
2
V
V
V
REF
REF
REF
1.15
0.9
0.9
TYP
1.25
-0.1
100
300
140
0.1
6.2
25
20
18
25
50
85
20
0
5
0
V
V
V
REF
REF
REF
0.95
0.95
IRU3146
1.2
MAX
2300
2300
-0.5
140
345
800
100
0.5
1.5
0.8
6.7
0.8
+5
32
24
50
50
5
V
V
V
REF
REF
REF
UNITS
µmho
µmho
KHz
KHz
mV
mA
µA
µA
µA
µA
µs
ns
ns
ns
ns
ns
%
%
%
V
V
V
V
V
V
V
V
V
V
V
C
C
3