lx1692b Microsemi Corporation, lx1692b Datasheet - Page 2

• Manufacturer Part Number: lx1692b
• Description: Full Bridge Resonant Ccfl Controller
• Manufacturer: Microsemi Corporation

Copyright © 2005
Rev. 1.1, 12/20/2006
Supply Input Voltage(VDDP)........................................................................................ 6V
VIN_SNS
Digital Input (ENABLE)................................................................. -0.3V to VDDP+0.5V
Analog Inputs (ISNS, OV_SNS, OC_SNS)clamped to ±14V Max Peak Current ±100mA
Analog Inputs (BRITE_A, BRITE_D)........................................... -0.3V to VDDP +0.5V
Digital Outputs (AOUT, BOUT, COUT, DOUT).......................... -0.3V to VDDP +0.5V
Analog Outputs (I_R, ICOMP, VCOMP) ..................................... -0.3V to VDDP + 0.5V
Maximum Operating Junction Temperature .............................................................150°C
Storage Temperature Range........................................................................... -65 to 150°C
Peak Package Solder Reflow Temp. (40 seconds maximum exposure)........260°C(+0, -5)
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect
Junction Temperature Calculation: T
The θ
above assume no ambient airflow.
Name
DW
PW
C_R
I_R
THERMAL RESISTANCE
THERMAL RESISTANCE
JA
Ground. Currents are positive into, negative out of specified terminal
TM
numbers are guidelines for the thermal performance of the device/pc-board system. All of the
Plastic SOIC 20-Pin
Plastic TSSOP 20-Pin
..................................................................................... -0.3V to VDDP+0.5V
Lamp Frequency Programming Capacitor Pin – lamp running frequency is set by the combination of C_R and
I_R. The internal lamp current oscillator frequency can be forced to follow an external clock signal at this pin. In
this case, the programmed frequency must be lower than the external frequency. Minimum pulse width for
external synch signal is 1µsec. Maximum duty is 50%
Current Reference Resistor Input. Connects to an external resistor that determines the magnitude of the
internal bias currents. The I_R pin is a DC reference voltage of 1V. This voltage should only be used for its
intended function. The reference current established at this pin, by connecting an external resistor, is used to
charge a capacitor at the C_R pin. The nominal lamp frequency can be adjusted by varying this resistor value in
the range of 20K to 100K Ohms. (Note: C is in pF, R is in
Other reference currents derived from I_R are used for the digital dimming burst oscillator and the strike time
out function.
F
LAMP
A B S O L U T E M A X I M U M R A T I N G S
=
C
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
242
C
_
R
×
⋅
-
-
10
R
JUNCTION TO
JUNCTION TO
I
_
T H E R M A L D A T A
3
R
J
= T
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
A
JA
MBIENT
MBIENT
).
Integrated Products Division
, θ
, θ
®
Microsemi
JA
JA
Description
.
Full Bridge Resonant CCFL Controller
K , Freq is in kHz).
85°C/W
Ω
99°C/W
P
RODUCTION
to
RoHS / Pb-free 100% Matte Tin Lead Finish
VIN_SNS
BRITE_A
BRITE_D
VIN_SNS
BRITE_A
BRITE_D
ENABLE
ENABLE
VCOMP
VCOMP
D
C_BST
C_BST
VDDA
C_TO
P A C K A G E P I N O U T
VDDA
C_TO
ATA
C_R
C_R
I_R
I_R
S
HEET
10
1
PW P
1
2
3
4
5
6
7
8
9
10
DW P
(Top View)
(Top View)
ACKAGE
ACKAGE
LX1692B
20
11
20
19
18
17
16
15
14
13
12
11
VDDP
AOUT
BOUT
GND
COUT
DOUT
ISNS
OV_SNS
ICOMP
OC_SNS
VDDP
AOUT
BOUT
GND
COUT
DOUT
ISNS
OV_SNS
OC_SNS
ICOMP
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