LX1688CPW-TR MICROSEMI [Microsemi Corporation], LX1688CPW-TR Datasheet - Page 2

• Manufacturer Part Number: LX1688CPW-TR
• Description: Multiple Lamp CCFL Controller
• Manufacturer: MICROSEMI [Microsemi Corporation]

Copyright © 2001
Rev. 1.2, 2006-03-09
Supply Voltage (VDD_P, VDD)................................................................................ 6.5V
Digital Inputs ................................................................................... -0.3V to VDD +0.5V
Analog Inputs.................................................................................. –0.1V to VDD +0.5V
Digital Outputs................................................................................. -0.3V to VDD +0.5V
Analog Outputs ................................................................................ -0.1V to VDD +0.5V
Maximum Operating Junction Temperature ............................................................150°C
Storage Temperature................................................................................. -65°C to 150°C
Peak Package Solder Reflow Temp. (40 seconds max. exposure) ................260°C(+0.-5)
Note 1: Exceeding these ratings could cause damage to the device. All voltages are with
respect to Ground. Currents are positive into, negative out of the specified terminal.
Junction Temperature Calculation: T
The θ
above assume no ambient airflow.
PW
PHA_SYNC
Pin Name
RMP_RST
THERMAL RESISTANCE
ENABLE
CPWM1
CPWM2
BEPOL
VSS_P
BRITE
CPOR
A
VSS
I_R
JA
OUT
TM
numbers are guidelines for the thermal performance of the device/pc-board system. All of the
Plastic TSSOP 24-Pin
A B S O L U T E M A X I M U M R A T I N G S
If SLAVE= “0”, PHA_SYNC is a CMOS output; if
SLAVE = “1”, it is a CMOS input that make the
A
Output Driver A
Connects to dedicated GND for Aout and Bout
Drivers
Connects to analog GND
Tri-mode input pin to control the polarity of the
ENABLE and BRITE signal
Analog/PWM input for brightness control
Connects an external capacitor C
is used for setting power-up reset pulse width.
Used to enable or disable the chip
Connects to external resistor R
setting for internal oscillator
Connects to external capacitor C
integrating an external digital PWM signal for
analog dimming
Connects to external capacitor C
integrating an external digital PWM signal for
analog dimming.
If SLAVE = “0”, RMP_RST is a CMOS output; if
SLAVE = “1”, it is a CMOS input that locks the
ramp oscillation frequency to the master clock
OUT
/B
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
OUT
-
phase synchronous with the master
JUNCTION TO
T H E R M A L D A T A
J
= T
Description
A
+ (P
F U N C T I O N A L P I N D E S C R I P T I O N
D
x θ
A
JA
MBIENT
).
I
; for bias current
PWM
PWM
POR
Integrated Products Division
, used for
, used for
to VDD and
, θ
®
Microsemi
JA
RangeMAX™
Pin Name
VDDSW
VCOMP
OLSNS
VDD_P
ICOMP
SLAVE
FAULT
TRI_C
VSNS
ISNS
B
VDD
Multiple Lamp CCFL Controller
100°C/W
OUT
P
RODUCTION
Output Driver B
Connects to dedicated VDD for Aout and Bout
Drivers
Connects to analog VDD
Switchable VDD output controlled by ENABLE
Connects to external capacitor C
Analog input to detect open-lamp condition
Analog input from lamp current, has built-in 300mv
offset
Current error Amp’s output; connects to external
capacitor C
Voltage error Amp’s output; connects to external
capacitor C
Analog input from transformer output voltage
Input control pin for setting the IC either in Master
or Slave mode; “1” for slave mode and “0” for
master mode.
Digital output to indicate maximum number of lamp
striking attempts has occurred without lamp
ignition.
PHA_SYNC
RoHS / Pb-free 100% matte Tin Lead Finish
ICOMP
VCOMP
RMP_RST
ENABLE
D
CPWM1
CPWM2
BEPOL
VSS_P
P A C K A G E P I N O U T
BRITE
CPOR
ATA
A
VSS
I_R
, can be used for soft-start
OUT
Description
S
HEET
10
11
12
1
2
3
4
5
6
7
8
9
PW P
(Top View)
ACKAGE
TRI
24
23
22
21
20
19
18
17
16
15
14
13
LX1688
B
VDD_P
VDD
VDDSW
TRI_C
OLSNS
ISNS
ICOMP
VCOMP
VSNS
SLAVE
FAULT
OUT
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