LT1786FCS#TRPBF Linear Technology, LT1786FCS#TRPBF Datasheet - Page 3

• Manufacturer Part Number: LT1786FCS#TRPBF
• Description: IC SW REG CCFL SMBUS PROG 16SOIC
• Manufacturer: Linear Technology

Specifications of LT1786FCS#TRPBF

• Applications: Converter, CCFL
• Voltage - Input: 4.5 ~ 30 V
• Number Of Outputs: 1
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
BAT = Royer = BULB = 12V, I
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: T
dissipation P
Note 3: Does not include switch leakage.
SYMBOL
I
V
I
V
V
V
SMBus Timing (Notes 5, 6)
f
t
t
t
t
t
t
t
t
t
t
LIM
IN
SMB
BUF
HD:STA
SU:STA
SU:STO
HD:DAT
SU:DAT
LOW
HIGH
f
r
SAT
IH
IL
OL
I
SW
I
Q
LT1786FCS: T
J
is calculated from the ambient temperature T
PARAMETER
CCFL High-Side Sense Servo Current
Line Regulation
CCFL High-Side Sense Supply Current Current Measured into BAT and Royer Pins
BULB Protect Servo Voltage
BULB Input Bias Current
CCFL Switch Current Limit
CCFL Switch On Resistance
Supply Current Increase During
CCFL Switch On Time
DAC Resolution
DAC Full-Scale Current
DAC Zero Scale Current
DAC Differential Nonlinearity
DAC Supply Voltage Rejection
Logic Input Current
High Level Input Voltage
Low Level Input Voltage
Low Level Output Voltage
SMB Operating Frequency
Bus Free Time Between Stop and Start Condition
Hold Time After (Repeated) Start Condition
Repeated Start Condition Setup Time
Stop Condition Setup Time
Data Hold Time
Data Setup Time
Clock Low Period
Clock High Period
Clock/Data Fall Time
Clock/Data Rise Time
D
according to the following formula:
J
= T
A
+ (P
D
)(100 C/W)
CCFL
= CCFL V
SW
= Open, DIO = I
CONDITIONS
BAT = 5V to 30V, I
I(V
I
Servo Voltage Measured between BAT and BULB Pins
I
Duty Cycle = 50%
Duty Cycle = 75% (Note 4)
CCFL I
CCFL I
V(I
V(I
3V V
0V V
ADR
SMBSUS
SCL, SDA
SMBSUS, ADR
SCL, SDA
I
I
CCFL
CCFL
OUT
OUT
C
OUT
OUT
A
) = 0 A at CCFL V
and power
= 3mA, SDA Only
= 1.6mA, SMBSUS = 0V, Measured at SHDN Pin
= 100 A, I(V
= 100 A, I(V
) = 0.465V
) = 0.465V
SW
SW
CC
IN
A
= 25 C. V
= 1A
= 1A
V
6.5V, I
CC
The
OUT
C
C
OUT
CCFL
) = 0 A at CCFL V
) = 0 A at CCFL V
CC
C
= GND, CCFL V
= Full Scale, V(I
denotes the specifications which apply over the full operating
= 100 A,
= 1.5V
= SHUTDOWN = SMBSUS = SCL = SDA = 3.3V,
Note 4: For duty cycles (DC) between 50% and 80%, minimum
guaranteed switch current is given by I
LT1786F due to internal slope compensation circuitry.
Note 5: Timings for all signals are referenced to V
Note 6: These parameters are guaranteed by design and are not tested in
production. Refer to the Timing Diagrams for additional information.
C
C
OUT
= 1.5V,
= 1.5V
C
= 0.5V, unless otherwise specified.
) = 0.465V
V
CC
LIM
MIN
1.25
300
250
6.5
0.9
2.4
1.4
4.7
4.0
4.7
4.0
4.7
4.0
50
98
96
10
– 0.3
= 1.4(1.393 – DC) for the
IH
TYP
100
100
100
0.1
7.0
1.9
1.6
0.6
0.2
20
5
6
0.1
and V
LT1786F
IL
MAX
1000
0.16
150
102
104
100
300
7.5
3.0
2.6
1.0
0.8
0.6
0.4
0.4
30
50
200
9
2
signals.
1
1
mA/A
3
UNIT
%/V
LSB
LSB
Bits
kHz
nA
ns
ns
ns
ns
A
V
A
A
A
A
A
A
V
V
V
V
V
V
V
s
s
s
s
s
s