Zxld1360, Electrical characteristics – Diodes ZXLD1360 User Manual
Page 4
ZXLD1360
ZXLD1360
Document number: DS33471 Rev. 4 - 2
4 of 25
March 2011
© Diodes Incorporated
A Product Line of
Diodes Incorporated
Electrical Characteristics
(Test conditions: V
IN
= 12V, TA = 25°C, unless otherwise specified. Note 3)
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
V
SU
Internal regulator start-up threshold
V
IN
rising
5.65 V
V
SD
Internal regulator shutdown threshold
V
IN
falling
5.55 V
I
INQoff
Quiescent supply current with output off
ADJ pin grounded
20
40
µA
I
INQon
Quiescent supply current with output switching
ADJ pin floating
f=250kHz
1.8
5.0
mA
V
SENSE
Mean current sense threshold voltage
(Defines LED current setting accuracy)
Measured on I
SENSE
pin
with respect to V
IN
V
ADJ
= 1.25V
95 100
105 mV
V
SENSEHYS
Sense threshold hysteresis
±15
%
I
SENSE
I
SENSE
pin input current
V
SENSE
= V
IN
-0.1
1.25
10 µA
V
REF
Internal reference voltage
Measured on ADJ pin
with pin floating
1.25 V
ΔV
REF
/
ΔT Temperature coefficient of V
REF
50
ppm/°C
V
ADJ
External control voltage range on ADJ pin for DC
brightness control (Note 2)
0.3
2.5
V
V
ADJoff
DC voltage on ADJ pin to switch device from
active (on) state to quiescent (off) state
V
ADJ
falling
0.15 0.2 0.25 V
V
ADJon
DC voltage on ADJ pin to switch device from
quiescent (off) state to active (on) state
V
ADJ
rising
0.2 0.25 0.3 V
R
ADJ
Resistance between ADJ pin and V
REF
0 < V
ADJ
< V
REF
V
ADJ
> V
REF
+100mV
135
13.5
250
25
k
Ω
I
LXmean
Continuous LX switch current
1
A
R
LX
LX switch ‘On’ resistance
@ I
LX
=0.55A
0.5
1.0
Ω
I
LX(leak)
LX switch leakage current
5
µA
D
PWM(LF)
Duty cycle range of PWM signal applied to ADJ
pin during low frequency PWM dimming mode
PWM frequency <500Hz
PWM amplitude = V
REF
Measured on ADJ pin
0.01 1
Brightness control range
100:1
D
PWM(HF)
Duty cycle range of PWM signal applied to ADJ
pin during high frequency PWM dimming mode
PWM frequency >10kHz
PWM amplitude = V
REF
Measured on ADJ pin
0.16 1
Brightness control range
5:1
t
SS
Soft start time
Time taken for output
current to reach 90% of
final value after voltage
on ADJ pin has risen
above 0.3V
500 µs
f
LX
Operating frequency
(See graphs for more details)
ADJ pin floating
L = 33µH (0.093V)
I
OUT
= 1A @ V
LED
= 3.6V
Driving 1 LED
280 kHz
t
OFFMIN
Minimum switch off-time
200
ns
t
ONMIN
Minimum switch on-time
240
ns
t
PD
Internal comparator propagation delay
50
ns
Notes: 3. Production testing of the device is performed at 25°C. Functional operation of the device and parameters specified over a -40°C to +125°C
temperature range, are guaranteed by design, characterization and process control.