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NXP Semiconductors
SSL3250A
Photo flash dual LED driver
11. Thermal characteristics
Table 8.
Thermal characteristics
Symbol
R th(j-a)
Parameter
thermal resistance from junction to ambient
Conditions
based on modeling on a four layer
Typ
63
Unit
K/W
board in free air and five thermal vias
under the IC [1]
[1]
The junction to ambient thermal resistance is dependent on the board layout, PCB material application, and environmental conditions.
12. Characteristics
Table 9. Characteristics
V I = 3.0 V to 5.5 V; T amb = ? 40 ° C to +85 ° C, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ [1]
Max
Unit
General voltage levels
V I
V I(extnd)(VIN)
V I(UVLO)
V hys(UVLO)
input voltage
extended input voltage on pin VIN
undervoltage lockout input voltage
undervoltage lockout hysteresis
on pin VIN
V I falling
V I rising
[2]
3.0
2.75
2.55
50
-
-
2.65
100
5.5
5.5
2.8
150
V
V
V
mV
voltage
General current levels
I sd
I leak(LX)
I lmtr(IM)(LX)
shutdown current
leakage current on pin LX
peak current limiter current on
Shut-down mode; ACT = 0
ACT = 0
inductor peak current limiter
-
-
-
-
-
2.2
1
0.5
2.4
μ A
μ A
A
pin LX
Output voltages on external resistor pins
V R_IND
V R_TR
V R_FL
voltage on pin R_IND
voltage on pin R_TR
voltage on pin R_FL
independent of load
independent of load
independent of load
[3]
[3]
[3]
1.17
1.17
1.17
1.22
1.22
1.22
1.27
1.27
1.27
V
V
V
Allowed input voltages on external resistor pins
V R_IND
V R_TR
V R_FL
voltage on pin R_IND
voltage on pin R_TR
voltage on pin R_FL
[3]
[3]
[3]
1.4
1.4
1.4
-
-
-
V I
V I
V I
V
V
V
External resistors
R ext(R_IND)
external resistance on pin R_IND
IF_SEL = 1; resistors used
[3][4]
25
-
165
k Ω
[5]
R ext(R_TR)
external resistance on pin R_TR
IF_SEL = 1; resistors used
[3][4]
25
-
200
k Ω
[5]
R ext(R_FL)
external resistance on pin R_FL
IF_SEL = 1 or 0; resistors used
[3][4]
50
-
357
k Ω
[5]
SSL3250A_5
? NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 16 December 2009
20 of 26
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