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LT1786FCS 数据表(PDF) 2 Page - Linear Technology

部件名 LT1786FCS
功能描述  SMBus Programmable CCFL Switching Regulator
PDF  20 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LT1786FCS 数据表(HTML) 2 Page - Linear Technology

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



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