LTC3722-1 LINER [Linear Technology], LTC3722-1 Datasheet - Page 4

• Manufacturer Part Number: LTC3722-1
• Description: Synchronous Dual Mode Phase Modulated Full Bridge Controllers
• Manufacturer: LINER [Linear Technology]

LTC3722-1/LTC3722-2
temperature range, otherwise specifications are at T
SYMBOL
Error Amplifier
V
FBI
A
IIB
V
V
I
I
Reference
V
REFLD
REFLN
REFTV
REFSC
Outputs
OUTH(x)
OUTL(x)
R
R
t
t
SDEL
Current Limit and Shutdown
CLPP
CLSD
CLDEL
SSI
SSR
FLT
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Sync amplitude = 5V
frequency = 1/2 sync frequency.
Note 3: Includes leading edge blanking delay, R
Note 4: FB is driven by a servo-loop amplifier to control V
tests.
4
ELECTRICAL CHARACTERISTICS
SOURCE
SINK
r(x)
f(x)
FB
VOL
OH
OL
REF
HI(x)
LO(x)
PARAMETER
FB Input Voltage
FB Input Range
Open-Loop Gain
Input Bias Current
Output High
Output Low
Output Source Current
Output Sink Current
Initial Accuracy
Load Regulation
Line Regulation
Total Variation
Short-Circuit Current
Output High Voltage
Output Low Voltage
Pull-Up Resistance
Pull-Down Resistance
Rise Time
Fall Time
SYNC Driver Turn-0ff Delay
Pulse by Pulse Current Limit Threshold
Shutdown Current Limit Threshold
Current Limit Delay to Output
Soft-Start Current
Soft-Start Reset Threshold
Fault Reset Threshold
P-P
, pulse width = 50ns. Verify output (A-F)
LEB
= 20k.
COMP
A
= 25 C. V
for these
Measured on CS
CONDITIONS
COMP = 2.5V (Note 4)
Measured on FB (Note 5)
COMP = 1V to 3V (Note 4)
COMP = 2.5V (Note 4)
Load on COMP = –100 A
Load on COMP = 100 A
COMP = 2.5V
COMP = 2.5V
T
Load on V
V
Line, Load
V
I
I
I
I
C
C
R
Measured on CS
100mV Overdrive on CS (Notes 3, 7)
SS = 2.5V
Measured on SS
Measured on SS
OUT(x)
OUT(x)
OUT(x)
OUT(x)
A
CC
REF
OUT(x)
OUT(x)
SPRG
= 25 C, Measured on V
The
= 6.5V to 9.5V
Shorted to GND
= 100k
= –50mA
= 50mA
= –50mA to –10mA
= –50mA to –10mA
= 50pF
= 50pF
CC
REF
denotes the specifications which apply over the full operating
= 9.5V, T
= 100 A to 5mA
Note 5: Set FB to –0.3V, 2.5V and insure that COMP does not phase
invert.
Note 6: The LTC3722E-1/LTC3722E-2 are guaranteed to meet
performance specifications from 0 C to 85 C. Specifications over the
–40 C to 85 C operating temperature range are assured by design,
characterization and correlation with statistical process controls.
Note 7: Guaranteed by design, not tested in production.
A
= t
REF
MIN
to t
MAX
, unless otherwise noted.
1.172
4.925
4.900
–0.3
0.55
MIN
400
240
4.7
7.9
0.7
4.5
70
18
2
7
1.204
5.000
4.92
0.18
5.00
0.65
TYP
800
180
270
0.9
8.4
0.6
0.4
3.9
80
90
30
22
12
12
5
5
2
5
5
1.236
5.075
5.100
MAX
0.73
300
2.5
0.4
0.1
3.5
20
15
10
45
30
20
15
15
17
1
UNITS
372212i
mA
mV
mV
mA
mV
dB
nA
ns
ns
ns
ns
V
V
V
V
A
V
V
V
V
V
A
V
V