lx1686 Microsemi Corporation, lx1686 Datasheet - Page 2

• Manufacturer Part Number: lx1686
• Description: Digital Dimming Ccfl Controller Ic
• Manufacturer: Microsemi Corporation

LX1686
2
(Unless otherwise specified, these specifications apply over the recommended operating conditions of T
(Ri = 40k , C
Power Supply Voltage
Operating Current
Power Supply Voltage
Output Buffer Operating Current
UVLO Threshold
UVLO Hysteresis
Direct Drive Ramp Block
Triangular Wave Generator Analog Output Peak Voltage
Triangular Wave Generator Analog Output Valley Voltage
Triangular Wave Generator Oscillation Frequency
Triangular Wave Generator Oscillation Charge Current
Triangular Wave Generator Oscillation Discharge Current
Ramp Generator Analog Output Peak Voltage
Ramp Generator Analog Output Valley Voltage
Ramp Frequency Change Threshold
Ramp Generator Oscillation Frequency - Nominal
Ramp Generator Oscillation Frequency - Maximum
OLSNS Threshold Voltage
OLSNS Hysteresis
OLSNS-to-ICOMP Propagation Delay
Supply Voltage (VDD, VDD_P) ......................................................................... 6.5V
Digital Inputs .................................................................................. -0.3 to VDD+0.5V
Analog Inputs .................................................................................. -0.3 to VDD+0.5V
Digital Outputs ................................................................................ -0.3 to VDD+0.5V
Analog Outputs ............................................................................... -0.3 to VDD+0.5V
Operating Junction Temperature
Storage Temperature Range .............................................................. -65°C to 150°C
Lead Temperature (Soldering, 10 seconds) .................................................... 300°C
Note 1. Exceeding these ratings could cause damage to the device. All voltages are with
PW PACKAGE:
Junction Temperature Calculation: T
The
system. All of the above assume no ambient airflow.
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
Plastic (DB, PW Packages) .......................................................................... 150°C
JA
numbers are guidelines for the thermal performance of the device/pc-board
respect to Ground. Currents are positive into, negative out of the specified
terminal.
VCO
A B S O L U T E M A X I M U M R AT I N G S
= 0.01µF, C
Parameter
AFD
= 0.22µF, C
T H E R M A L D ATA
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
J
= T
D
TRI
A
= 0.83µF, C
I G I T A L
+ (P
P
E L E C T R I C A L C H A R A C T E R I S T I C S
R E L I M I N A R Y
D
x
JA
JA
).
D
RAMP
I M M I N G
= 208pF, R
Symbol
V
I
V
V
V
T
VDD_P
DISCHG_TRI
F
V
V
V
TH_RAMP_R
I
TH_OLSNS
TH_UVLO
CHG_TRI
F
H_OLSNS
D_OLSNS
VDD
V
V
RAMP_HI
I
H_UVLO
P_RAMP
V_RAMP
F
DD_P
I
RAMP
P_TRI
V_TRI
DD
_TRI
(Note 1)
VDD = VDD_P
VDD = VDD_P = 5V
VDD = VDD_P
Volsns = VDD = VDD_P = 5V, C
Tri_c = 0V
Tri_c = 3V
VDD = 3V
VDD = 5.5V
V
V
VDD = 3V
VDD = 3V
GBD
RAMP
TRI_C
TRI_C
C C F L C
= 15k , C
= 1.4V
= 2.25V
D
100°C/W
A T A
Test Conditions
O N T R O L L E R
PD
= 0.22µF, C
S
H E E T
A
PDC
= C
= 0.047µF, R
I C
A
B
= 1000pF
= 0 to 85°C, VDD=VDD_P= 3.0 to 5.5V)
BRT_POS
DIG_DIM
RAMP_C
RAMP_R
VCO_C
AFD_C
PD_CR
VSS_P
AOUT
FVERT
BRITE
VSS
PACKAGE PIN OUTS
PD
= 110k .)
1.55
Min.
-2.3
170
250
2.7
2.3
1.4
84
3
3
PW PACKAGE
(Top View)
RangeMAX
LX1686
-2.55
Typ.
2.25
0.75
2.65
2.25
0.75
1.65
160
100
200
300
1.5
10
45
5
2
1
Max.
1.65
-2.9
116
256
360
5.5
5.5
2.9
2.9
1.8
10
7
BOUT
VDD_P
VDD
TRI_C
OLSNS
ISNS
ICOMP
VSNS
VCOMP
BRT
I_R
ENABLE
Units
KHz
KHz
mA
mA
mV
mV
mV
Hz
µA
µA
µS
V
V
V
V
V
V
V
V
V
TM