lx1689 Microsemi Corporation, lx1689 Datasheet - Page 2

• Manufacturer Part Number: lx1689
• Description: Third Generation Ccfl Controller
• Manufacturer: Microsemi Corporation

Copyright © 2000
Rev. 1.1, 2006-02-27
P
IN
Supply Voltage (
Digital Input (
Analog Inputs Transient Peak (
Analog Inputs (
Digital Inputs (DIM_CLK,
Digital Output (
Analog Outputs (
Storage Temperature Range ........................................................................ -65°C to 150°C
Maximum Operating Junction Temperature...............................................................150°C
RoHS / Pb-free Peak Package Solder Reflow Temperature
(40 second maximum exposure).....................................................................260°C (+0,-5)
Note:
Junction Temperature Calculation: T
The θ
system. All of the above assume no ambient airflow.
V
V
V
PW
T
GND
A
B
N
_BATT
DD_P
DD_A
HERMAL RESISTANCE
OUT
OUT
AME
JA
TM
Exceeding these ratings could cause damage to the device. All voltages are with respect to
Ground. Currents are positive into, negative out of specified terminal.
numbers are guidelines for the thermal performance of the device/pc-board
Plastic TSSOP 20-Pin
ENABLE
Ground
Power VDD_P Supply Output. This output pin is used to connect an external capacitor to stabilize and filter the
on chip VDD_P LDO regulator. The input of the LDO is the switched V
and is used only to drive the output buffers at A
ceramic dielectric. Up to 5mA DC additional load may be imposed by external circuitry. External load must be
reduced if the combination of output current and input voltage exceeds power dissipation capability of the die.
A buffer N-FET driver output. The pin includes a internal 10K pull down resistor.
Analog VDD_A Supply Output. This output pin is used to connect an external capacitor to stabilize and filter the
on chip VDD_A LDO regulator. The input of the LDO is the switched V
2.95V and is used to drive all circuitry except the output buffers at AOUT and BOUT. Average internal load is
6mA. Up to 5mA DC additional load may be imposed by external circuitry. External load must be reduced if the
combination of output current and input voltage exceeds power dissipation capability of the die. The external
capacitor will be a 100 to 1000nF ceramic dielectric type.
B buffer N-FET driver output. The pin includes a internal 10K pull down resistor.
Voltage Input, 3 to 28V input range. V
regulators follow the switch, one generates VDD_P (see VDD_P) and the other VDD_A (see VDD_A). Care
must be taken in power distribution design to minimize transients and noise coupling from the VDD_P output to
the VDD_A output. The external capacitor will be a 100 to 1000nF ceramic dielectric type.
BRITE_IN, EA_IN
A
V
BRITE_C, I_R, BRITE_OUT, BRITE_R, EA_OUT
OUT
A B S O L U T E M A X I M U M R A T I N G S
_BATT
, B
)................................................................................................. 30V
).....................................................................................-0.3V to 7V
OUT
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
) .................................................................-0.3V to V
DIM_MODE, DIV_248
-
JUNCTION TO
I_SNS, OC_SNS, OV_SNS)
T H E R M A L D A T A
).................................................................. -0.3V to 5.5V
J
= T
F U N C T I O N A L P I N D E S C R I P T I O N
A
+ (P
A
MBIENT
D
) ......................................... -0.3V to 5.5V
x θ
JA
).
, θ
Integrated Products
®
..............................-25V to +25V
_BATT
Microsemi
JA
is switched (see ENABLE) to remove power from chip. Two LDO
) ...-0.3V to V
OUT
D
ESCRIPTION
and B
Third Generation CCFL Controller
OUT
DD_A_
144°C/W
DD_P
. The external capacitor will be a 100 to 1000nF
+0.5V
+0.5V
P
RODUCTION
_BATT
_BATT
supply. LDO output is normally 5.3V
supply. LDO output is normally
DIM_MODE
RoHS / Pb-free 100% Matte Tin Lead Finish
DIM_CLK
BRITE_IN
BRITE_C
BRITE_R
D
DIV_248
ENABLE
P A C K A G E P I N O U T
ATA
GND
A
B
OUT
OUT
S
HEET
1
2
3
4
5
6
7
8
9
10
PW P
(Top View)
ACKAGE
16
13
12
11
20
19
18
17
15
14
LX1689
VDD_A
V_BATT
OC_SNS
VDD_P
OV_SNS
BRITE_OUT
EA_OUT
EA_IN
I_SNS
I_R
Page 2