LT1786F Linear Technology, LT1786F Datasheet - Page 2

• Manufacturer Part Number: LT1786F
• Description: SMBus Programmable CCFL Switching Regulator
• Manufacturer: Linear Technology

ABSOLUTE
ELECTRICAL CHARACTERISTICS
T
DIO = I
LT1786F
V
BAT, Royer, BULB .................................................. 30V
CCFL V
Shutdown ................................................................. 6V
I
DIO Input Current (Peak, < 100ms).................... 100mA
Digital Inputs .............................. – 0.3V to (V
Digital Outputs ............................ – 0.3V to (V
DAC Output Voltage ..................... – 15V to (V
Junction Temperature (Note 1) ............................ 100 C
Operating Ambient Temperature Range ..... 0 C to 70 C
Storage Temperature Range ................ – 65 C to 150 C
Lead Temperature (Soldering, 10 sec)................. 300 C
SYMBOL
I
ISUS
I
f
DC(MAX)
BV
2
Q
SHDN
CCFL
A
CC
= 25 C, V
........................................................................... 7V
Input Current .............................................. 10mA
OUT
SW
= GND, CCFL V
PARAMETER
Supply Current
SMBSUS Supply Current
SHUTDOWN Supply Current
SHUTDOWN Input Bias Current
SHUTDOWN Threshold Voltage
Switching Frequency
Maximum Switch Duty Cycle
Switch Breakdown Voltage
Switch Leakage Current
I
CCFL V
CCFL V
CCFL V
CCFL V
CCFL V
CCFL High-Side Sense Servo Current
CCFL
Input Programming Current
I
I
CCFL V
............................................................... 60V
CC
CCFL
CCFL
= SHUTDOWN = SMBSUS = SCL = SDA = 3.3V, BAT = Royer = BULB = 12V, I
Summing Voltage
Summing Voltage for
Programming Current
C
C
C
C
C
C
Offset Sink Current
to DIO Current Servo Ratio
Low Clamp Voltage
High Clamp Voltage
Switching Threshold
Source Current for
W
MAXIMUM
C
= 0.5V, unless otherwise specified.
W W
RATINGS
CONDITIONS
3V V
SMBSUS = 0V or Command Code Bit 7 = 1,
CCFL V
SHUTDOWN = 0V, CCFL V
SHUTDOWN = 0V, CCFL V
Measured at CCFL V
I
Measured at CCFL V
Measured at CCFL V
V
V
3V V
CCFL
I
CCFL V
I
CCFL V
DIO = 5mA out of Pin, Measure I(V
V
I
CCFL V
I
SW
SW
CCFL
CCFL
CCFL
CCFL
BAT
= 12V, Measured at CCFL V
= 30V, Measured at CCFL V
= 100 A, CCFL V
= 0 A to 100 A
– V
= 25 A, 50 A, 75 A, 100 A,
= 100 A
= 100 A, I(V
U
CC
CC
C
C
C
SW
= Open (Note 2)
CC
CC
CC
BULB
= 1.5V, Positive Current Measured into Pin
= 1.5V
6.5V, I
6.5V
DC = 0%
+ 0.3V)
+ 0.3V)
+ 0.3V)
= BULB Protect Servo Voltage
OUT
C
) = 0 A at CCFL V
SW
SW
SW
= 0 A
C
, I
= Open
SW
C
C
PACKAGE/ORDER
= Open
Consult factory for Industrial and Military grade parts.
= Open (Note 2)
= 50mA,
SW
SW
CCFL PGND
SMBSUS
C
CCFL V
) at CCFL V
C
AGND
SHDN
I
ADR
CCFL
= 1.5V
DIO
C
T
JMAX
1
2
3
4
5
6
7
8
16-LEAD PLASTIC SO
= 100 C,
C
S PACKAGE
= 1.5V
TOP VIEW
CCFL
JA
= 100 C/W
= CCFL V
16
15
14
13
12
11
10
9
CCFL V
BULB
BAT
ROYER
V
I
SCL
SDA
OUT
CC
0.425
0.385
0.45
4.70
0.93
MIN
175
160
1.7
0.6
– 5
80
75
60
94
INFORMATION
SW
U
SW
= Open,
0.465
0.465
0.85
4.95
0.95
1.00
TYP
150
200
200
0.1
2.1
40
85
85
70
99
6
5
5
5
ORDER PART
W
LT1786FCS
NUMBER
0.505
0.555
MAX
5.20
1.07
100
300
225
240
104
9.5
1.2
0.3
2.4
1.3
10
20
40
15
15
UNITS
U
A/mA
A/ A
kHz
kHz
mA
mV
%
%
A
A
A
V
V
A
A
V
V
A
V
V
V
A