zxld1360 Zetex Semiconductors plc., zxld1360 Datasheet - Page 3

• Manufacturer Part Number: zxld1360
• Description: 1a Led Driver With Internal Switch
• Manufacturer: Zetex Semiconductors plc.

Electrical characteristics
(*) Parameters are not tested at production. Parameters are guaranteed by design, characterization and process control.
Issue 1 - March 2007
© Zetex Semiconductors plc 2007
NOTES:
Symbol
R
I
R
I
D
D
T
f
T
T
T
f
D
T
LXmean
LX(leak)
LX
LXmax
ONmin_REC
SS
ONmin
OFFmin
PD
ADJ
LX
PWM(LF)
PWM(HF)
LX
Parameter
Resistance between ADJ pin and
V
Continuous LX switch current
LX Switch ‘On’ resistance
LX switch leakage current
Duty cycle range of PWM signal
applied to ADJ pin during low
frequency PWM dimming mode
Brightness control range
Duty cycle range of PWM signal
applied to ADJ pin during high
frequency PWM dimming mode
Brightness control range
Soft start time
Operating frequency
(See graphs for more detail)
Minimum switch ‘ON’ time
Minimum switch ‘OFF’ time
Recommended minimum switch
'ON' time
Recommended maximum
operating frequency
Recommended duty cycle range
of output switch at f
Internal comparator propagation
delay
REF
(test conditions: V
LXmax
Conditions
0< V
V
@ I
PWM frequency
<500Hz
PWM amplitude = V
Measured on ADJ pin
PWM frequency >10kHz
PWM amplitude = V
Measured on ADJ pin
Time taken for output
current to reach 90% of
final value after voltage
on ADJ pin has risen
above 0.3V
ADJ pin floating
L = 33 H (0.093 )
I
Driving 1 LED
LX switch ‘ON’
LX switch ‘OFF’
LX switch 'ON'
OUT
IN
ADJ
3
=12V, T
LX
ADJ
= 1A @ V
> V
= 1 A
< V
REF
amb
REF
+100mV
LED
=25°C unless otherwise stated)
= 3.6V
REF
REF
Min.
13.5
0.01
0.16
135
0.3
240
200
100:1
Typ.
500
280
800
ZXLD1360
0.5
5:1
50
www.zetex.com
(*)
(*)
Max. Unit
250
1.0
0.7
25
1
5
1
1
1
(
cont.)
MHz
KHz
k
ns
ns
ns
ns
A
A
s