LXM1620-01 MICROSEMI, LXM1620-01 Datasheet - Page 5

• Manufacturer Part Number: LXM1620-01
• Manufacturer: MICROSEMI

Specifications of LXM1620-01

• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Not Compliant

Rev. 0.11 12/03
Direct Drive architecture includes two load feedback control loops to
provide uncompromised CCFL ignition and operation characteristics.
constant light output with changing lamp parameters and power supply
voltage. This also allows accurate and repeatable brightness control.
Dimming ratio with the LX1620 analog dimming inverters is typically 6:1
when driving dual LCD lamp panels.
Lamp current is regulated in the CCFL return lead (I
If no current flows in the CCFL return path because of an unstruck or
0V
SLEEP
BRITE
GND
£ 10k
PRELIMINARY DATA - Information contained in this document is pre-production data, and is proprietary to LinFinity. It may not modified
in any way without the express written consent of LinFinity. Product referred to herein is offered in sample form only, and Linfinity reserves
the right to change or discontinue this proposed product at any time.
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
5.0V
D
D I R E C T D R I V E O U T P U T A R C H I T E C T U R E
5V
I R E C T
DC
Controller
D
FIGURE 4 — Potentiometer Brightness Control
NOT RECOMMENDED FOR NEW DESIGN
R I V E
T Y P I C A L A P P L I C A T I O N S
FIGURE 3 — LXM1620 Block Diagram
BRITE
SNS
SLEEP
loop) to insure
D
SEE
U A L
(Only one lamp shown)
10.8V
LXM1620-xx
LXM1624-12-61
Transformer
L
A M P
GND
Driver
I
DC
V
SENSE
IN
- 16V
CCFL I
V
failed lamp, the inverter applies full strike voltage potential. The output
voltage feedback loop (V
1650V
and aging conditions.
component and panel insulation ratings. This prevents destructive corona
discharge to insure long term reliability of the system.
SENSE
DC
High Voltage
Because output voltage is actively regulated, it will never exceed
Transformer
RMS
N V E RT E R
. This insures the lamp will ignite under worst case temperature
V
V
V
HI2
HI1
LO
M
O D U L E
SNS
) takes control and regulates output voltage to
V
V
HI1
LO
LXM1620-01
5