ZXLD1362
Absolute maximum ratings (voltages to GND unless otherwise stated)
Input voltage (V )
-0.3V to +60V (65V for 0.5 sec)
IN
I
voltage (V
)
+0.3V to -5V (measured with respect to V )
SENSE
SENSE
IN
LX output voltage (V
)
-0.3V to +60V (65V for 0.5 sec)
LX
Adjust pin input voltage (V
)
-0.3V to +6V
1.25A
ADJ
Switch output current (I
)
LX
Power dissipation (P
)
1W
tot
(Refer to package thermal de-rating curve on page 16)
Operating temperature (T
)
-40 to 125°C
-55 to 150°C
150°C
OP
)
Storage temperature (T
ST
Junction temperature (T
)
j MAX
These are stress ratings only. Operation outside the absolute maximum ratings may cause device failure. Operation
at the absolute maximum ratings, for extended periods, may reduce device reliability.
Thermal resistance
Junction to ambient (R
)
82°C/W
TBD
⍜JA
Junction to case (R
)
⍜JC
(a)
Electrical characteristics (test conditions: V =24V, T
=25°C unless otherwise stated)
IN
amb
Symbol Parameter
Conditions
Min. Typ. Max. Unit
(c)
V
V
Input voltage
6
60
V
V
See note
IN
Internal regulator shutdown
threshold
Quiescent supply current
with output off
Quiescent supply current
with output switching
4.7
65
SD
I
I
ADJ pin grounded
TBD
TBD
A
INQoff
INQon
ADJ pin floating,
L=68H, 3 LEDs,
f = 260kHz
1.8
mA
V
Mean current sense threshold
voltage
(Defines LED current setting accuracy)
Measured on I
pin with respect to V
95
100
105
mV
SENSE
SENSE
IN
V
= 1.25V
ADJ
V
Sense threshold hysteresis
15
4
%
A
V
SENSEHYS
I
I
pin input current
V
= V -0.1
TBD
SENSE
SENSE
SENSE
IN
V
Internal reference voltage
Measured on ADJ pin
with pin floating
1.25
REF
⌬V
/⌬T Temperature coefficient of V
50
ppm/°C
V
REF
REF
V
External control voltage range on
ADJ pin for DC brightness control
0.3
2.5
ADJ
(b)
V
DC voltage on ADJ pin to switch
device from active (on) state to
quiescent (off) state
V
falling
0.15
0.2
0.25
V
ADJoff
ADJ
NOTES:
(a) Production testing of the device is performed at 25°C. Functional operation of the device and parameters specified over
a -40°C to +105°C temperature range, are guaranteed by design, characterization and process control.
(b)100% brightness corresponds to VADJ = VADJ(nom) = VREF. Driving the ADJ pin above VREF will increase the VSENSE
threshold and output current proportionally.
.
(c) VIN > 16V to fully enhance output transistor. Otherwise out current must be derated - see graphs. Operation at low
supply may cause excessive heating due to increased on-resistance.
Provisional version B - July 2007
© Zetex Semiconductors plc 2007
2
www.zetex.com