LT1786FCS Linear Technology, LT1786FCS Datasheet - Page 20

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

Specifications of LT1786FCS

• 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: Contains lead / RoHS non-compliant
• Voltage - Output: -

RELATED PARTS
LT1786F
TYPICAL
20
PART NUMBER
LT1172
LT1173
LT1182
LT1183
LT1184
LT1184F
LT1186F
LT1316
LT1372
LT1786
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone]
APPLICATION
SHUTDOWN
DESCRIPTION
Current Mode Switching Regulator for CCFL or LCD Contrast Control
Micropower DC/DC Converter for LCD Contrast Control
Dual Current Mode Switching Regulator for CCFL and LCD Contrast Control
Dual Current Mode Switching Regulator for CCFL and LCD Contrast Control
Current Mode Switching Regulator for CCFL Control
Current Mode Switching Regulator for CCFL Control
DAC Programmable Current Mode Switching Regulator for CCFL Control
Micropower DC/DC Converter for LCD Contrast Control
Current Mode Switching Regulator for CCFL or LCD Contrast Contol
CCFL Controller for Wide Dimming Range and Maximum Lamp Lifetime
1 F
C7
90% Efficient Grounded CCFL with 2-Wire SMBus Control of Lamp Current
1
2
3
4
5
6
7
8
I
DIO
CCFL V
AGND
SHDN
SMBSUS
ADR
CCFL
PGND
CCFL
LT1786F
C
U
BAT85
D1
CCFL V
ROYER
www.linear.com
BULB
I
SDA
BAT
SCL
V
OUT
SW
CC
1000pF
16
15
14
13
12
11
10
9
C5
+
TO
SMBus
HOST
R3
100k
1%
R2
221k
1%
C4
2.2 F
3V < V
< 6.5V
Q2
3
10
CC
0.068 F
LAMP
+
C1
2
L2
100 H
6
C3
2.2 F
35V
Q1
1
COMMENTS
1.25A, 100kHz
1A, 24kHz, Hysteretic
1.25A, 0.625A, 200kHz
1.25A, 0.625A, 200kHz
1.25A, 200kHz
1.25A, 200kHz
1.25A, 200kHz, SPI or Pulse Mode
Programmable Peak Current Limit
1.5A, 500kHz
Multiple Lamp Capability, No Lamp Flicker, Precision
Maximum and Minimum Lamp Currents Maximize
Lamp Life
C2
27pF
3kV
4
1N5818
C1 MUST BE A LOW LOSS CAPACITOR
C1 = WIMA MKI OR MKP-20
L1 = COILTRONICS CTX210605
L2 = COILTRONICS CTX100-4
(DO NOT SUBSTITUTE COMPONENTS
COILTRONICS [phone])
Q1, Q2 = ZETEX ZTX849 OR ROHM 25C5001
D1
PANASONIC ECH-U
5
L1
1786fa LT/CP 0801 1.5K REV A • PRINTED IN USA
R1
750
1%
LINEAR TECHNOLOGY CORPORATION 1998
1786F TA03
BAT
8V TO 28V