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LT1768IGN データシート(PDF) 2 Page - Linear Technology

部品番号 LT1768IGN
部品情報  High Power CCFL Controller for Wide Dimming Range and Maximum Lamp Lifetime
PDF  20 Pages
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メーカー  LINER [Linear Technology]
ホームページ  http://www.linear.com
Logo LINER - Linear Technology

LT1768IGN データシート(HTML) 2 Page - Linear Technology

  LT1768IGN Datasheet HTML 1Page - Linear Technology LT1768IGN Datasheet HTML 2Page - Linear Technology LT1768IGN Datasheet HTML 3Page - Linear Technology LT1768IGN Datasheet HTML 4Page - Linear Technology LT1768IGN Datasheet HTML 5Page - Linear Technology LT1768IGN Datasheet HTML 6Page - Linear Technology LT1768IGN Datasheet HTML 7Page - Linear Technology LT1768IGN Datasheet HTML 8Page - Linear Technology LT1768IGN Datasheet HTML 9Page - Linear Technology Next Button
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LT1768
2
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IQ
Supply Current
9V< VVIN < 24V
q
78
mA
ISHDN
Supply Current in Shutdown
VSHDN = 0V
q
65
100
µA
SHDN Pin Pull-Up Current
VSHDN = 0V
q
47
12
µA
SHDN Threshold Voltage
VSHDN Off to On
q
0.6
1.26
1.8
V
SHDN Threshold Hysteresis
q
100
200
300
mV
VIN Undervoltage Lockout
VIN Off to On
q
7.2
7.9
8.2
V
VIN Undervoltage Lockout
VIN On to Off
q
7.1
7.4
7.6
V
VREF
REF Voltage
IREF = –1mA
q
4.9
5
5.1
V
REF Line Regulation
∆VVIN 8V to 24V IREF = –1mA
q
720
mV
REF Load Regulation
∆IREF –1mA to –10mA
q
10
20
mV
VRMAX
RMAX Pin Voltage
q
1.225
1.25
1.275
V
VRMIN
RMIN Pin Voltage
q
1.22
1.26
1.30
V
FSW
Switching Frequency
VPROG = 0.75V, VSENSE = 0V
q
300
350
410
kHz
Maximum Duty Cycle
VPROG = 0.75V, VSENSE = 0V
93
%
Minimum ON Time
VPROG = 0.75V, VSENSE = 150mV
125
ns
IPROG
PROG Pin Input Bias Current
VPROG = 5V
q
100
500
nA
VPROG
PROG Pin Voltage for Zero Lamp Current
(Note 2)
q
0.45
0.5
0.55
V
PROG Pin Voltage for Minimum Lamp Current
(Note 3)
q
0.9
1
1.1
V
PROG Pin Voltage for Maximum Lamp Current
(Note 4)
q
3.8
4
4.2
V
Input Voltage (VIN Pin) ............................................ 28V
SHDN Pin Voltage .................................................... 28V
FAULT Pin Voltage ................................................... 28V
PROG Pin Voltage ................................................... 5.5V
PWM Pin Voltage .................................................... 4.5V
CT Pin Voltage ........................................................ 4.5V
SENSE Pin Voltage .................................................... 1V
DIO1, DIO2 Input Current ...................................
±50mA
RMAX Pin Source Current ..................................... 750µA
RMIN Pin Source Current ..................................... 750µA
VREF Pin Source Current ....................................... 10mA
Operating Junction Temperature Range
LT1768C ................................................ 0
°C to 125°C
LT1768I ............................................ – 40
°C to 125°C
Storage Temperature Range ................. – 65
°C to 150°C
Lead Temperature (Soldering 10 sec)................... 300
°C
ORDER PART
NUMBER
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
ELECTRICAL CHARACTERISTICS
TJMAX = 125°C, θJA = 100°C/W
1
2
3
4
5
6
7
8
TOP VIEW
GN PACKAGE
16-LEAD PLASTIC SSOP
16
15
14
13
12
11
10
9
PGND
DI01
DI02
SENSE
VC
AGND
CT
PROG
GATE
VIN
VREF
FAULT
SHDN
RMIN
RMAX
PWM
LT1768CGN
LT1768IGN
The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VVIN = 12V, IDIO1/2 = 250µA, VPROG = 0V, VPWM = 2.5V, IRMAX = –100µA,
IRMIN = –100µA, unless otherwise specified.
GN PART
MARKING
1768
1768I



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