LTC1427-50 Просмотр технического описания (PDF) - Linear Technology
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LTC1427-50 Datasheet PDF : 8 Pages
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LTC1427-50
TYPICAL APPLICATIONS
SMBus-Controlled Floating CCFL Power Supply
ALUMINUM ELECTROLYTIC IS RECOMMENDED FOR C3B WITH AN
ESR ≥ 0.5Ω TO PREVENT DAMAGE TO THE LT1184F HIGH-SIDE
SENSE RESISTOR DUE TO SURGE CURRENTS AT TURN-ON.
C1 MUST BE A LOW LOSS CAPACITOR, C1 = WIMA MKP-20
Q1, Q2 = ZETEX ZTX849 OR ROHM 2SC5001
L1 = COILTRONICS CTX210605
L2 = COILTRONICS CTX100-4
*DO NOT SUBSTITUTE COMPONENTS
COILTRONICS (407) 241-7876
UP TO 6mA
LAMP
C2
27pF
10
6 3kV
3
2 14
C5
R2
1000pF 220k
+ C3B
2.2µF
35V
L1
5
BAT
+ C3A 8V TO 28V
2.2µF
R1
35V
750Ω
VCC
3.3V
C6
0.1µF
0µA TO 50µA ICCFL CURRENT GIVES
0mA TO 6mA LAMP CURRENT FOR A
TYPICAL DISPLAY.
SHDN
LTC1427-50
1
SHDN
2
AD1
3
AD0
8
VCC
7
IOUT
6
SCL
4
GND
5
SDA
TO
SMBUS
HOST
D5
BAT85
R3
100k Q2*
1 CCFL
2
PGND
ICCFL
16
CCFL VSW
15
BULB
3
14
DIO LT1184F BAT
C7, 1µF 4
13
CCFL VC
ROYER
5
12
AGND
VIN
6
11
SHDN
REF
7
NC
10
NC
8 NC
NC 9
C1* Q1*
0.1µF
L2
D1
100µH 1N5818
+
C4
2.2µF
VIN
3.3V
1427 TA01
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.010
(0.254
–
–
0.020
0.508)
×
45°
0.008 – 0.010
(0.203 – 0.254)
0.053 – 0.069
(1.346 – 1.752)
0°– 8° TYP
0.016 – 0.050
0.406 – 1.270
0.014 – 0.019
(0.355 – 0.483)
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
TYP
0.228 – 0.244
(5.791 – 6.197)
0.189 – 0.197*
(4.801 – 5.004)
8
7
6
5
1
2
34
0.150 – 0.157**
(3.810 – 3.988)
SO8 0996
RELATED PARTS
PART NUMBER
LTC1329-10/LTC1329-50
LTC1380/LTC1393
LTC1426
LTC1428
LTC1623
DESCRIPTION
Micropower 8-Bit Current Source DAC
SMBus Single-Ended 8-Channel/Differential
4-Channel Multiplexers
Micropower Dual 6-Bit PWM DAC
Micropower 8-Bit Current Sink DAC
SMBus Dual High Side Switch Controller
8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417q (408)432-1900
FAX: (408) 434-0507q TELEX: 499-3977 q www.linear-tech.com
COMMENTS
1-Wire, 2-Wire or Standard 3-Wire SPI Control
Single 2.7V to ±5V Supply, Low Power
Pulse Mode and Push-Button Mode Interface
1-Wire, 2-Wire or Standard 3-Wire SPI Control
Regulated Onboard Charge Pump Drives External N-Channel MOSFETs
142750f LT/TP 0398 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1998
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