zxld1362 Zetex Semiconductors plc., zxld1362 Datasheet - Page 2

• Manufacturer Part Number: zxld1362
• Description: 1a Led Driver With Internal Switch
• Manufacturer: Zetex Semiconductors plc.

Absolute maximum ratings (voltages to GND unless otherwise stated)
Electrical characteristics
NOTES:
(a) Production testing of the device is performed at 25°C. Functional operation of the device and parameters specified over
(b) V
(c) Static current of device is approximately 700 A, see Graph, Page 18
(d) 100% brightness corresponds to V
Issue 1 - December 2007
© Zetex Semiconductors plc 2007
Symbol
V
V
V
I
I
V
V
I
V
V
V
Input voltage (V
I
LX output voltage (V
Adjust pin input voltage (V
Switch output current (I
Power dissipation (P
(Refer to package thermal de-rating curve on page 16)
Operating temperature (T
Storage temperature (T
Junction temperature (T
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
Junction to board (R
INQoff
INQon
SENSE
SENSE
SENSEHYS
ADJ
ADJoff
IN
SU
SD
SENSE
REF
V
a -40°C to +105°C temperature range, are guaranteed by design, characterization and process control.
supply may cause excessive heating due to increased on-resistance. Tested at 7V guaranteed for 6V by design.
threshold and output current proportionally.
REF
IN
> 16V to fully enhance output transistor. Otherwise out current must be derated - see graphs. Operation at low
/ T Temperature coefficient of V
voltage (V
Parameter
Input voltage
Under-voltage lock-out start up
threshold
Under-voltage lock-out shutdown
threshold
Quiescent supply current
with output off
Quiescent supply current
with output switching
Mean current sense threshold voltage
(Defines LED current setting accuracy)
Sense threshold hysteresis
I
Internal reference voltage
External control voltage range on ADJ
pin for DC brightness control
DC voltage on ADJ pin to switch
device from active (on) state to
quiescent (off) state
SENSE
IN
SENSE
pin input current
)
tot
ΨJB
LX
)
)
)
ST
LX
)
JA
j MAX
OP
)
)
)
ADJ
)
)
(test conditions: V
ADJ
)
(c)
= V
(d)
ADJ(nom)
REF
= V
Conditions
See note
ADJ pin grounded
ADJ pin floating,
L=68 H, 3 LEDs,
f = 260kHz
Measured on I
with respect to V
V
V
Measured on ADJ pin
with pin floating
V
-0.3V to +60V (65V for 0.5 sec)
+0.3V to -5V (measured with respect to V
-0.3V to +60V (65V for 0.5 sec)
-0.3V to +6V
1.25A
1W
-40 to 125°C
-55 to 150°C
150°C
82°C/W
33°C/W
REF
ADJ
ADJ
SENSE
2
IN
. Driving the ADJ pin above V
=24V, T
= 1.25V
falling
= V
(b)
IN
amb
-0.1
SENSE
=25°C unless otherwise stated)
IN
pin
Min.
0.15
0.3
95
6
REF
will increase the V
Typ.
4.85
4.75
1.25
100
±10
1.8
0.2
ZXLD1362
50
65
4
www.zetex.com
Max.
0.27
105
2.5
60
90
10
IN
)
ppm/°C
Unit
SENSE
mA
mV
%
V
V
V
V
V
V
(a)
A
A
.